Regulation for the Design, Construction and Operation of Storage and Filling Plants for LPG 1st-OBJECTIVE AND SCOPE OF APPLICATION This Regulation establishes the technical requirements that must be observed and fulfilled throughout the National Territory for the design, construction and operation of LPG Storage and filling Plants with a storage capacity greater than 3 785 liters, in relation to the diverse operations of storage, transport, and supply.
2nd-DEFINITIONS For the purposes of this Regulation, the definitions contained in the standard INTE 21-1-24-99 Storage and Handling of Liquefied Petroleum Gases (LPG) must be used.
3rd-GENERAL PROJECT REQUIREMENTS 3.1 Generalities. For the granting of the location permit for an LPG storage and filling plant, the requirements indicated in articles 9 and 14 of the Reglamento para la Regulación del Sistema de Comercialización de Hidrocarburos must be presented.
3.2 Project presentation. The presentation of the project must consist of plans, statements (memorias), operation manuals, maintenance manuals, safety and emergency procedures manuals, and other documents established by this regulation, in the Spanish language or official translation, duly ordered and bound, in a single copy.
3.3 Plant project. The project must contain the basic information for the Civil, Mechanical, Electrical, Fire Safety, and Process areas.
3.4 Area responsible parties. In the statement (memoria), the chapters for each specialty and the corresponding plans must indicate the data of the responsible parties for the project area indicated below:
3.4.1 Civil area: civil engineer or architect with their respective professional registration number, full name, and signature.
3.4.2 Mechanical area: mechanical engineer with their respective professional registration number, full name, and signature.
3.4.3 Fire safety area: set of professionals participating in the elaboration of the project, who must note their respective professional registration number, full name, and signature.
3.4.4 Electrical area: electrical engineer with their respective professional registration number, full name, and signature.
3.4.5 Process area: chemical engineer with their respective professional registration number, full name, and signature.
3.5 Plans and statements (memorias). The plans and statements (memorias) must have the same date, be duly numbered and signed.
3.5.1 Plan scales. The drawings, diagrams, sketches, charts, and details that make up a plan must be drawn to scale, in such a way that the drawings presented are legible and of adequate size for their interpretation. The scale may be indicated graphically or numerically.
3.5.2 Plan specifications. They must be to scale and with dimensions, unless otherwise indicated.
3.5.3 Symbology. The symbols used in the plans must comply at a minimum with what is indicated in Decreto Ejecutivo 26483-MEIC (RTCR 289), without prejudice to the use of others not provided for and which are of usual practice in the industry, for which their meaning must appear in the plans.
3.6 Plans for project areas. The information and data indicated may be presented in one or several plans.
3.7 Official Laws and Regulations. The L.P. gas storage and filling plants must also comply with the legislation in force, according to the following official regulations:
3.7.1 Ley General de Salud.
3.7.2 Electrical installations regulation (Reglamento de instalaciones eléctricas).
3.7.3 Emergency Stairways Regulation (Reglamento de Escaleras de Emergencia).
3.7.4 Ley Orgánica del Ambiente.
3.7.5 Water Supply and Sewerage Regulation (Reglamento de Acueductos y Alcantarillados).
3.7.6 Electrical Code of Costa Rica. (CODEC) 3.7.7 Seismic Code of Costa Rica.
3.7.8 Decreto Ejecutivo No. 25235-MTSS, Reglamento de Seguridad en Construcciones, of February 5, 1996, La Gaceta No. 122 of June 27, 1996.
3.7.9 Decreto Ejecutivo No. 1 Reglamento de Seguridad e Higiene del Trabajo of the year 1967.
3.7.10 Decreto Ejecutivo No. 26483-MEIC, Reglamento Técnico RTCR289:1997. "Fire Safety. Graphic Symbols for their Use in Construction Plans and Emergency Plans," La Gaceta No. 232 of December 2, 1997.
3.7.11 Decreto Ejecutivo No. 24867-S, Hazardous Materials Risk Classification (Clasificación del Riesgo de los Materiales Peligrosos), La Gaceta No. 22 of January 31, 1996.
3.7.12 Decreto Ejecutivo No. 28113-S(*), Reglamento para Registro de Productos Peligrosos, La Gaceta No. 194, Alcance 74 of October 6, 1999.
(*)(Note from Sinalevi: Through article 2 of Reglamento Técnico RTCR 478:2015 Chemical Products. Hazardous Chemical Products. Registration, Importation and Control approved by decreto ejecutivo No. 40705 of August 17, 2017, the following is established: "Henceforth, in any regulation in which Decreto Ejecutivo No. 28113-S of September 10, 1999 "Reglamento para el Registro de Productos Peligrosos" is cited as a reference for any requirement, it shall be interpreted that the same correspond to what is indicated in this Decree". Said decree comes into force as of May 3, 2018) (*) (Note from Sinalevi: through article 2 of Reglamento técnico RTCR 481:2015 Chemical Products. Hazardous Chemical Products. Labeling, approved by decreto ejecutivo No. 40457 of April 20, 2017, it is established that in any regulation where Decreto Ejecutivo No. 28113-S of September 10, 1999 "Reglamento para el Registro de Productos Químicos Peligrosos," published in Alcance No. 74 to La Gaceta No. 194 of October 6, 1999, is cited as a reference to any labeling requirement, it shall be interpreted that the same correspond to what is indicated in decreto ejecutivo No. 40457 of April 20, 2017) 3.7.13 Decreto Ejecutivo No. 12715-MEIC Norma Oficial for the Use of Colors in Safety and their Symbology, of June 15, 1981, La Gaceta of July 16, 1981.
Likewise, with the Standards and Codes of the Associations and Institutions listed below:
3.7.14 INTE 21-4-3-96 (RTCR 289:1997). Fire safety. Graphic symbols for their use in construction plans and emergency plans.
3.7.15 INTE 21-1-1-96. (RTCR 226). Portable fire extinguishers.
3.7.16 INTE 21-3-2-96. Fire protection. Emergency Plans 3.7.17 INTE 31-7-3-97. Safety. Color code for the identification of fluids conducted in pipes.
3.7.18 INTE 21-1-24-99 Standard for the storage and handling of LPG" 3.7.19 CODEC. National Electrical Code of Costa Rica. College of Electrical, Mechanical and Industrial Engineers.
The following standards are taken as references:
3.7.20 ASTM A 53. "Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless".
3.7.21 ASTM E 114.
3.7.22 ASTM E 587 3.7.23 ASTM E 1003 3.7.24 API 510 3.7.25 API RP-500c 3.7.26 ANSI B 31.3.
3.7.27 ANSI B 2.1.
3.7.28 ANSI B 16.5.
3.7.29 ANSI 300.
3.7.30 ANSI-ISA-S 12.13.
3.7.31 ANSI RP 12.6 3.7.32 NFPA 20 3.7.33 U.L. Underwriter Laboratories 3.7.34 U.L.C. Underwriter Laboratories of Canada.
These reference standards are available at the Instituto de Normas Técnicas de Costa Rica.
In the event that the design is based on standards different from those set forth here, their acceptance or rejection corresponds to the competent authority (DGTCC). The acceptance is conditioned on the minimum standard established.
4th-GENERAL REQUIREMENTS OF THE CIVIL PROJECT 4.1 General Concepts. The plans that contain constructions must indicate the materials used in them. They must contain the pertinent information on means used for the delimitation of the property, buildings, offices, workshops, guardhouse, warehouses, sanitary services, water supply installations, sanitary installations, stormwater drainage, protection zones in the different areas, indication of circulation routes, direction and route number and location of the railroad siding or spur and all the concepts used that are mentioned in the specifications.
The existing distances between the different elements of the plant must be indicated, the pipe network in single-line diagram, with equipment location, as well as a location sketch indicating the orientation of the land and its location, marking the direction of the prevailing winds and intermittent or permanent watercourses. The calculation statement (memoria de cálculo) must be attached.
The design must consider what is established in the EIA regarding the civil design, operation, safety, environmental protection, and any other consideration for the correct design and operation of the project.
4.2 General distribution plan. Dimensioned plan that includes the plant with its storage zones, transfer (trasiego) zones, and the constructions or properties external to the plant, indicating the owner and activity or use, within a radius of up to 100 m, measured from the LPG storage or transfer (trasiego) area, whichever is closest to the adjoining property, in which case the reference element shall be the filling manifold in the transfer (trasiego) area or the storage tank closest to the adjoining property.
4.3 Support bases for storage containers. Show their characteristics, the required steel reinforcement, and necessary anti-corrosion protection elements.
4.4 Filling dock (andén de llenado). Plan, elevation, and longitudinal and transverse sections. Mark the location of accesses and flammable atmosphere detection equipment. Closed filling docks (andenes de llenado) are prohibited.
4.5 Sanitary modules. Plan, elevation, and longitudinal and transverse sections. Detail of the sanitary installations. They must comply with the Construction Regulation (Reglamento de Construcciones), and with Decreto Ejecutivo No. 1 Reglamento de Seguridad e Higiene del Trabajo.
4.6 Portable cylinder sales area to the user. The sales area for portable cylinders must be a premises designed for this purpose, where the user has safety, ease of parking, delivery and receipt of the cylinder, and ventilation. Closed sales premises are prohibited.
4.7 Calculation statement (memoria de cálculo). A copy must be included of all the corresponding calculations and the methodology applied.
5th-GENERAL REQUIREMENTS OF THE MECHANICAL PROJECT 5.1 Storage containers. Longitudinal and transverse view of each container specifying the type and location of valves and accessories.
Once the mechanical installation is completed, the manufacturer's technical data sheet must be presented to the DGTCC, ASME certification or one issued by a recognized national or international body. Records and results of inspections carried out, including the pressure test, the measurement of body and head thicknesses if the containers are used.
5.2 Isometric diagram of the gas installation. In double-line, without scale or dimensions, with details of all its components, using the pipe colors and symbology established in standard INTE 31-7-3-97, detailing grades, diameters, capacities, materials, and valving.
5.3 Reception, supply, and vehicle fueling connections. Show their design with dimensions, anchoring, characteristics, and the calculation statement (memoria de cálculo).
5.4 Calculation statement (memoria de cálculo). A copy must be included of all the corresponding calculations and the methodology applied.
6th-GENERAL REQUIREMENTS OF THE ELECTRICAL PROJECT 6.1 Generalities. They must comply with the requirements of the electric power supply company.
6.2 Single-line diagram. Plan view, without scale nor dimensions of the electrical installation in a single-line diagram with load chart, which must comply with the provisions of article 500 of the CODEC.
6.3 Calculation statement (memoria de cálculo). A copy must be included of all the corresponding calculations and the methodology applied.
7th-GENERAL REQUIREMENTS OF THE FIRE SAFETY PROJECT 7.1 Generalities. Present in detail plans of the installation of the fire prevention and fighting system with the endorsement of the Benemérito Cuerpo de Bomberos.
7.1.1 Isometric diagram of the fire-fighting installation: In single-line without scale with details of all its components: pumps, fuel tank, water tank, pipe diameters, instrumentation, power ratings, capacities, location of monitors, hydrants, and equipped fire hose cabinets (gabinetes equipados).
7.1.2 Area coverage: Development of areas projected to be covered with the extinguisher, hydrant, or monitor system.
7.1.3 Location of extinguishers: Location of the extinguishers indicating capacity and type in accordance with the provisions of standard INTE 21-1-1-96.
7.1.4 Calculation statement (memoria de cálculo): A copy must be included of the calculation statement (memoria de cálculo) for the fire prevention and fighting systems.
8th-GENERAL REQUIREMENTS OF THE PROCESS PROJECT 8.1 Generalities. The process plans, calculation statement (memoria de cálculo), and operating process manual must be included as part of the project presentation.
8.2 Flow diagram and process plans. The plans must be dimensional and with nomenclature in accordance with the provisions of this document (see section 3.5).
8.3 Risk analysis plan. Dimensioned plan where the risks of normal plant operation, emergency risks, and major emergency risks must be detailed. Concentric circles must be drawn on the topographic plan including all the buildings within the possible reach of the events analyzed and their possible consequences, as well as other details required. It must comply with the provisions of point 13.2 of this regulation.
8.4 Risk analysis and mitigation. The complete analysis of the risk of the LPG product, its consequences, and the possible mitigation must be included.
8.5 Operation manual. The operation manual must cover all the operational aspects of the plant in accordance with the regulations and legislation in force.
8.6 Calculation statement (memoria de cálculo). A copy must be included of all the corresponding calculations and the methodology applied.
9th-SPECIFIC REQUIREMENTS OF THE CIVIL PROJECT 9.1 Land requirements. The land where an LPG storage and filling plant is installed must comply with the following requirements:
9.1.1 Have a dimension that allows locating all the components safely and complying with the requirements established in this Regulation.
9.1.2 Have the corresponding state and municipal alignments.
9.1.3 Must be located in zones authorized by the competent body in accordance with the Zoning Plan (Plan Regulador) of the area, or failing that, by the INVU and the Ministry of Health. They may not be built in residential areas.
9.1.4 There must be no high-voltage lines that cross the land, whether aerial or underground. The property must be located at a minimum safeguard distance of 30.0 m with respect to high-voltage lines, railway lines, and ducts transporting petroleum-derived products; said distance shall be measured taking as a reference the location of the LPG storage tanks and the indicated restriction elements.
9.1.5 Respecting the distance of 30.0 m indicated in the preceding point, with respect to ducts transporting petroleum-derived products, if for any reason the construction of access roads and exits over them is required, it is an indispensable requirement that the required documentation include the description of the protective works for the ducts; said works must be approved by the respective area of RECOPE.
9.1.6 Must not be located in landslide zones, high seismic risk zones, or floodable zones in accordance with the CNE.
9.1.7 Access to the plant must be via a public road with a width of no less than fourteen (14) meters. The access must not be located in a highway sector that is on a vertical curve, or horizontal curve, or it must maintain a minimum distance of one hundred meters from these.
9.1.8 For safety reasons, the construction of LPG storage and filling plants is not permitted whose distance is less than or equal to (in accordance with point 4.2 of this regulation) that indicated below:
9.1.8.1 One hundred meters from factory buildings or sites where explosive or flammable products or substances are stored, sites of public congregation, and electrical substations.
9.1.8.2 Two hundred meters from service stations, with the exception of installations for supplying fuel to vehicles of the same company, or for the sale of L.P. gas for automotive vehicle carburation, which are installed within the L.P. gas filling plants, duly authorized by the DGTCC, for which it must comply with all the safety measures provided in this regulation, and in standard INTE 21-1-24-99.
9.1.9 When there are railway lines at the accesses to the plant, the crossings must have a level and firm finish that allows the easy passage of vehicles.
9.1.10 If the land is in zones susceptible to erosion, lower parts of hillocks, land with unevenness, or low-lying land, the analysis and development of corresponding measures must be done within the EsIA.
9.1.11 If a probable risk is manifested in a determined direction of the land due to its conformation or location or due to operational risks of the installations, dikes, berms (muretes) must be built, or other effective means used to channel ventilation towards non-hazardous zones, avoiding the accumulation of gases.
9.2 Boundaries. For the establishment of the boundaries, the following must be considered:
9.2.1 Dimensions and orientation, owners of lands, and activities carried out within the radius defined in point 4.2.
9.2.2 The distances from the plant to the internal buildings must be governed by INTE-21-1-24-99 Standard for the Storage and Handling of LPG.
9.2.3 The plant must have a safety ring to enforce the minimum distances of this Regulation.
9.3 General layout plans (planos de conjunto).
9.3.1 Description of general characteristics of accesses, walls or delimitations of the land, constructions (such as: offices, bathrooms, warehouses, workshops), indicating the materials used, railroad spurs, parking lots, internal circulation, sanitary and water supply installations, and protection zones for storage containers, pumps, compressors, and all the concepts used in the design.
9.3.2 The plant design must have the appropriate slopes and systems for the discharge of rainwater.
9.3.3 The circulation and parking zones must have at least a consolidated surface finish and sufficient width for the easy and safe movement of tanker trucks and people.
9.4 Blank wall (tapia ciega).
9.4.1 A wall must be built, with material whose fire resistance is at least three hours and with a height of no less than three meters above the construction level of the plant, in the following cases:
9.4.2 When the installations of existing plants become risky, due to variation in the conditions external to the plant boundaries. In this case the wall shall be built on the entire perimeter in its risk zone.
9.4.3 In non-urban zones, if it is near a national or municipal highway at a distance of less than 100 m, counted from the center of the storage or transfer (trasiego) area to the center of the highway. In this case the wall shall be built on the boundary facing said highway. The other sides may be delimited by any convenient means of non-combustible material with a minimum height of 2 m.
9.5 Accesses.
9.5.1 The plant must have accesses that allow the easy entry and exit of vehicles, so that their movements do not hinder traffic outside the plant. They must be controlled by means of gates with a minimum clear opening of 6 m. The gates must be of blank sheet metal. In non-urban areas that do not have an entrance onto a municipal or national highway, they may be of another metallic material, such as at least cyclone mesh. Gates for people must have a minimum width of 1.2 m and may be an integral part of the vehicle gate or independent.
9.5.2 When the accesses are from a national or cantonal highway, they must have the respective authorization from the Dirección General de Ingeniería de Tránsito of the Ministerio de Obras Públicas y Transportes (the project must include at least acceleration and deceleration lanes, horizontal and vertical signaling of the zone, value of the minimum turning radius, and consider functional aspects).
9.5.3 The plant must have at least one emergency exit for people and vehicles, which must be duly signaled, in accordance with Decreto No. 26483 MEIC.
9.6 Foundations for storage containers. A description and structural calculation of the foundations for the storage containers must be made. The design and construction must conform to the specifications of the Construction Regulation in force in the country and the Seismic Code.
9.7 Protection zones. The storage containers, machinery, and the reception, supply, and vehicle fueling connections must be protected by adequate means such as posts, pile bumpers, or steel guards covered with non-sparking material or reinforced concrete, whose design and materials protect them from damage that any vehicle could cause. The protection must allow ample natural ventilation and easy access to the machinery and controls. It must have a minimum height of 0.6 m above the floor level. The maximum permissible clear span between elements is 1.5 m.
No additional protection will be required for storage containers, machinery, or connections located on a concrete platform, with a height of no less than 0.6 m above the floor level.
The floor must have a concrete finish and have a slope that allows the discharge of rainwater. The ground surface under the tanks must be finished with concrete. The floor level under the pipes that connect the tanks must have a slope in a direction perpendicular to the axis of the pipes and crowning beneath them.
9.8 Buildings. They must be of non-combustible material in their construction, exterior windows and doors, structure, roofs, and canopies.
9.9 Dock (andén) for portable containers. Description of the construction of the dock (andén), indicating materials used, edge protection, and accesses.
The dock (andén) must comply with the provisions of standard INTE 21-1-24-99.
9.10 Platform. It must be a filled platform and its floor must be covered with concrete, to allow easy and safe handling of the portable cylinders. Its edge on the sides where the cylinders are loaded and unloaded must be protected against sparks from impacts caused by delivery vehicles. Rubber, wood, or non-sparking material protectors are acceptable.
9.11 Walls and baffles (mamparas). In places where winds predominate in the direction of the operation areas, causing discomfort and consequently inadequate maneuvering, walls, covered walls (tapias cubiertas), or baffles (mamparas) that prevent them may be built, without detriment to adequate ventilation.
9.12 Accesses to the plant. It must have at least two accesses that allow the easy evacuation of personnel in case of emergency.
9.13 Services. The construction of service rooms inside the plant for surveillance personnel is optional; these must meet the best safety and hygiene conditions (lighting, ventilation, location) and be equipped with means to store food, reheat it, and store utensils.
9.14 Sanitary Services. They must be built in accordance with Chapter VII of Decreto Ejecutivo No. 25235-MTSS Reglamento de Seguridad en Construcciones and article 86 of Decreto Ejecutivo No. 1 Reglamento de Seguridad e Higiene del Trabajo of the year 1967.
If the bathroom service for personnel use requires water heaters, the location of these will always be in interior courtyards, at a distance of 25 m or more from the storage or transfer (trasiego) zones of combustible materials.
9.15 Portable cylinder sales area to the user. It must be located so as to prevent the user from passing into the interior of the plant when delivering and receiving the container and have sufficient width and natural ventilation.
9.16 Parking lots.
9.16.1 The parking of vehicles inside the plant must allow the orderly exit of the units in case of emergency, and must have free areas for easy circulation.
9.16.2 Public parking must be located outside the plant, in such a way that it does not obstruct the entry and exit accesses (including emergency ones), as well as any element used in firefighting.
9.17 Roofs or canopies for vehicles. Covering the places intended for parking with protective roofs is optional.
9.18 Workshops. Having a workshop for the repair of delivery vehicles and tanker trucks inside the plant is optional. They will be for the exclusive use of vehicles under the company's responsibility. The construction of pits is prohibited. If necessary, ramps will be used.
9.19 Trenches for pipes. The trench and its cover must be capable of withstanding the traffic passing over them, whether vehicular or pedestrian. The covers must be grated. They must have drainage to safe zones.
9.20 Railroad spurs and unloading towers. The spurs must comply with current legislation. Their end section must be provided with adequate bumpers.
9.21 Installations for the sale of L. P. gas for automotive vehicle carburation. It must be located so as to prevent the passage of the user into the interior of the plant.
All its boundaries with the plant must be delimited by any convenient means of non-combustible material with a minimum height of 2 m.
9.22 Distances between elements. The minimum distances that must be respected in the plants, measured from the nearest external limit to the comparison or measurement element, must be:
9.22.1 From storage containers to:
Boundary walls of the plant property 15m if the tank has a capacity between 7570 and 113550 liters.
23 m if the tank has a capacity greater than 113550 and less than 264950 liters.
30 m if the tank or set of tanks has a capacity greater than 264,950 liters.
Railway spur, nearest rail 15 m if the tank has a capacity between 7,570 and 113,550 liters.
23 m if the tank has a capacity greater than 113,550 and less than 264,950 liters.
Portable cylinder filling manifold (múltiple de llenado de cilindros portátiles) 6 m Loading platform (andén de llenado) 15 m if the tank has a capacity between 7,570 and 113,550 liters.
23 m if the tank has a capacity greater than 113,550 and less than 264,950 liters.
30 m if the tank or set of tanks has a capacity greater than 264,950 liters.
Offices or Warehouses 15 m if the tank has a capacity between 7,570 and 113,550 liters.
23 m if the tank has a capacity greater than 113,550 and less than 264,950 liters.
30 m if the tank or set of tanks has a capacity greater than 264,950 liters.
Between storage containers 1.5 m or ¼ of the sum of the diameters of both tanks, whichever is greater Bottom crest of the container to finished floor 1.5 m minimum Vehicle supply connection (toma de abastecimiento vehicular) 6 m Railway tank car receiving connection (toma de recepción de carros tanque de ferrocarril) 12 m Receiving and supply connections (tomas de recepción y suministro) 6 m Ornamental vegetation 15 m Protection zone for storage containers 2 m Facilities for supplying fuel to vehicles of the same company or facilities for L.P. gas dispensing for carburation 25 meters or 1.5 times the distance of motor vehicles, within the plant Offices or Warehouses, whichever is greater 9.22.2 Filling manifold (múltiple de llenado) (nozzle) for cylinders to:
Plant's own boundary line (lindero) 15 m Plant's own offices or warehouses 15 m Receiving, supply, and vehicle supply connections (tomas de recepción, suministro y abastecimiento vehicular) 6 m Ornamental vegetation 15 m 9.22.3 From receiving, supply, and vehicle supply connections to:
Offices, guard service room, and warehouses 15 m Ornamental vegetation 5 m 9.22.4 From storage and transfer (trasiego) zones to:
Fire pumps 25 m Emergency electrical power plant 15 m Workshops 25 m Water supply tank 25 m Electrical control panel area or room 15 m 9.22.5 From pumps and compressors to:
Limit of their protection zones 2 m 9.23 Signage. Describe the types, characteristics, and location of the signage to be placed in each of the various zones of the plant, in accordance with Executive Decree No. 26483-MEIC (RTCR 289).
9.24 Paint and prevention signs.
9.24.1 Distinctive colors for pipes. Pipes must be painted in accordance with the provisions of standard INTE 31-7-3-98 Safety Color Code for the Identification of Fluids Conveyed in Pipes or Executive Decree No. 12715-MEIC Official Standard for the Use of Colors in Safety and their Symbols.
9.24.2 Paint for storage containers. It must be white in color and marked with distinctive color characters not less than 0.15 m, capacity, content, and tank number. They must bear the international distinctive corresponding to Class 2 (gases) of the international classification of dangerous goods, as shown in Executive Decree No. 24867-S, on the risk classification of hazardous materials, as well as Code 1075, assigned to liquefied petroleum gases internationally.
9.24.3 Paint on stops, posts, and protection. Stops, posts, and other protections must be painted in alternating diagonal stripes of yellow and black, in accordance with Executive Decree No. 12715-MEIC. The width of the stripes must be 0.1 m.
9.24.4 Signs in the plant enclosure. Visible signs must be posted Sign Location Danger flammable gas Various No entry for vehicles or persons At the plant entrance No lighting fires in this zone Entire plant No entry to this zone for any unauthorized person. On each side of the storage zone No smoking in these facilities Entire plant Keep your cell phone off in these facilities Entire plant Entry to the interior of the plant prohibited Public sales zone Table indicating the color codes for pipes At least at the plant entrance Preventive sign in red color with white background, in the shape of a rhombus with minimum dimensions per side of one meter, which must have a flame drawn inside 0.45 m high by 0.34 m wide and the legend GAS Exterior of the property accesses for INFLAMMABLE in minimum dimensions of vehicle and railroad tank car entrances 10 X 10 cm.
9.24.5 Sign when a tanker is connected to the connection (toma). A visible sign shall be placed, indicating:
Sign Location Tanker connected to the plant system Transfer zone Containing flammable LPG Tanker entrance and exit Exterior of the tanker entrance to the plant Emergency exit On both sides of said doors Vehicle repairs prohibited Storage and transfer zones in this zone Evacuation route Various Maximum speed 10 kph At the plant entrance and every 25m along the internal road Contingency action plan sign Various 10.-SPECIFIC REQUIREMENTS OF THE MECHANICAL PROJECT 10.1 Project and calculation of pipes.
10.1.1 The pressure and temperature for which the system is designed must be indicated. Indicate the service pressure and temperature.
10.1.2 The flow calculation in lines, connections, and accessories must be developed and certified by a competent professional in competent engineering.
10.2 Accessories and equipment. The equipment and accessories used for the storage and handling of LPG must be certified, and have the U.L. or U.L.C. initials stamped on them.
All accessories and equipment used for gas handling in a plant must withstand a working pressure of 2.40 MPa (24.61 kgf/cm²) as a minimum, or the project design pressure, whichever is greater.
10.3 Storage containers.
10.3.1 A description of the storage containers and their accessories must be provided, as well as the characteristics of the control instruments. Indicate the general characteristics of accessories, connections, hoses, pipes, and valves.
10.3.2 It must include a copy of the container manufacturing certificate, use and operation authorization, leak test certification, and a tracing of the certification plate.
10.3.3 Technical data sheet or manufacturing certificate. It must include at a minimum:
10.3.3.1 Design pressure and temperature.
10.3.3.2 Working pressure and temperature.
10.3.3.3 Indicate hydraulic test pressure.
10.3.3.4 Manufacturing material.
10.3.3.5 Design thicknesses.
10.3.3.6 Corrosion allowances.
10.3.3.7 Standard and edition under which it was designed.
10.3.3.8 Year of manufacture.
10.3.3.9 Volume.
10.3.3.10 Container weight.
10.3.3.11 Radiography 10.3.3.12 Heat treatment, if any.
10.3.3.13 Number and setting (set pressure) of the relief valves.
10.3.3.14 Numerical value of the seismic design coefficient for the installation site.
10.3.3.15 Dimensions.
10.3.3.16 Connection openings and accessories.
10.3.3.17 Manufacturer's data.
10.4 Placement of containers. Storage containers must be placed on the support bases on the part of the reinforcement or support plate required by the manufacturing standard. The placement of the container on the bases must allow for its expansion and contraction movements. The base must conform to the container it receives, in such a way that the load is distributed uniformly.
Between the base plate and the foundation, waterproofing material must be used to minimize the effects of moisture corrosion. If the base plate is adapted, waterproofing material must be used between the tank-plate and plate-foundation. The maximum number of containers per group must be between 6 and 9, as established by INTE 21-1-24-99.
10.5 Ladders. To facilitate the reading of measurement instruments, a fixed ladder and walkway must be provided. The location of the walkways must not impede the cooling of the tank under fire conditions. The ladder must comply with safety measures for emergency stairs.
A permanent metal ladder and walkway must be provided for easy and safe access to the upper part of the containers, so as to guarantee the maintenance of the safety valves.
10.6 Upper level of the tank. When containers are interconnected in their liquid phase, they must be leveled at their upper level, at their maximum filling points, with a tolerance of 2% of the outer diameter of the smaller container.
10.7 Liquid outlets. The liquid outlets of the storage containers must always be on their lower part. The use of containers with liquid outlets on the upper part is not permitted.
10.8 Instruments and accessories. The excess flow valves, check valves (no retroceso), maximum filling valves, rotary meter, thermometer, and pressure gauge shall conform to national standards or, in their absence, to the standards used internationally by the industry.
10.9 Pressure gauges. They must have a minimum reading range of 0 to 2.48 MPa.
10.10 Thermometers. They must have a minimum range of 253º K to 323º K (-20º C to + 50º C).
10.11 Pressure relief valve discharge.
10.11.1 They must have metal discharge pipes with a minimum length of 2 m, with a diameter equal to or greater than that of the valve, and have fracture points if the valve or coupling does not have one.
10.11.2 The installation of the valves must comply with the ASME standard or similar.
10.12 Other container outlets. All entrances and exits for liquid and vapors of containers with a diameter greater than 6 mm, except those for pressure relief, maximum filling, rotary meter, pressure gauge, and thermometer, must be protected with excess flow valves or check valves, depending on the function to be performed, followed by a control valve. Other automatic valves that fulfill one or both functions shall be accepted. If internal valves are used, a subsequent control valve must be provided. Sampling and purge connections on the containers must have double valves.
10.13 Modifications or repairs to storage containers. They must comply with the provisions, according to their date of manufacture, with national standards or, in their absence, with the ASME standard or the code used for their manufacture, for which the owner must provide the necessary documentation for such approval.
10.14 Damage and inspections of containers.
10.14.1 If, before or during the installation maneuver of a storage container, damages are caused that affect its integrity, whether geometric or physical, tests must be carried out to verify or confirm its integrity. Such tests must be performed under the inspection and supervision of an authorized inspector. The API 510 standard is used as a reference. A certified copy of the corresponding opinion must be provided to the DGTCC.
10.14.2 The equipment used for these tests must be certified and in good operating condition. Those equipment that require frequent calibration and certification under laboratory conditions must be up to date. Inspection results performed with uncalibrated or expired equipment are not accepted. The personnel performing the tests must be accredited according to current national regulations.
10.14.3 Every container destined for bulk storage, for sale or internal consumption, must be subjected to thickness measurement on the body and heads. The ASTM E 114 and ASTM E 587 standards or similar are used as a reference. This test must be performed biannually. Likewise, a pressure test must be performed at 150% of its working pressure or at the pressure recommended by the manufacturer. The ASTM E 1003 standard or similar is used as a reference. The pressure test must be performed according to the period established by the manufacturer, with reference to the provisions of point 4.3 of the API 510 standard, or every six years, whichever period is less.
10.14.4 Any container whose remaining thickness does not satisfy the minimum thickness requirements, necessary for the design pressure of its plate or technical data sheet, must be taken out of service.
10.14.5 The authorized inspector shall be a professional expressly recommended by the pertinent Professional Association (Colegio Profesional). This recommendation is individual and must be based on the procedure established by the Professional Association, in which the applicant's credentials in this matter are evaluated at a minimum. The Professional Association, in the recommendation document it issues, must include the criteria used.
10.15 Container history.
10.15.1 Every container destined for bulk storage for sale or internal consumption must have a historical archive until its removal from service, and at a minimum, a copy of the manufacturer's original technical data sheet, a copy of the ASME or equivalent metallic certification plate, the latest calibration of the relief valves, and records of tests and inspections performed.
10.15.2 Every test, inspection, and repair performed during the life of the container must be recorded in a written report rendered by an authorized inspector. A copy of this report must always be sent to the DGTCC. The report must remain at the facilities and form part of the container's history. This history may be requested at any visit by DGTCC officials. It is the obligation of each company to keep this history up to date and accessible.
10.15.3 Companies that, on the publication date of this regulation, have containers that do not have a manufacturer's technical data sheet shall have a grace period of up to one year from its publication date to obtain or reconstruct it, which must be endorsed by an authorized inspector. Tanks that do not meet the previously established requirements must be taken out of operation.
10.16 Pumps, compressors, and machinery. A description, general specifications, capacity, and maintenance program for the equipment must be provided. All this equipment must be designed, manufactured, constructed, and certified for handling LPG.
Pumps and compressors must be mounted on a metal structure, which shall be anchored to a concrete base.
10.17 Machinery sheds. It is mandatory to have sheds for the machines.
10.18 Closed rooms for machinery. It is optional to have closed rooms for the machines.
10.19 Pumps. Pumps for LPG use may be rotary, centrifugal, turbine, or reciprocating and must be of positive pressure type. It is optional to use emergency LPG pumping in case of electrical power interruption.
10.20 Compressors. They must be for LPG use, have liquid traps, and may be rotary or reciprocating. They must be oil-free in the gas compression chamber.
The discharge of the liquid purge valve must be at a minimum height of 2.5 m above the floor level, such that it does not affect the operator. It must have a shed and the discharge shall be to the exterior.
10.21 Liquid meters. The use of volumetric meters is optional. If used, they must be protected against mechanical damage and withstand a working pressure of 2.4 MPa as a minimum, or the project design pressure, whichever is greater.
10.22 Piping system.
10.22.1 Pipes. The types of pipes used must be specified, justifying the materials according to the design pressure, with reference to the ANSI B31.3 standard or similar.
10.22.1.1 The system must be designed to allow for its easy maintenance and be protected against mechanical damage. It must be integrated in its entirety with rigid pipes firmly installed, except where there is a need to absorb stress, vibrations, settlements, thermal variations, or possible movements. For this purpose, flexible connectors or changes in direction with pipe or pipe and connections must be used. Connectors must be special for fire conditions.
10.22.1.2 Pipes must be installed supported above the floor level or inside concrete trenches with metal grids. The support shall be made of non-combustible material. The height of the pipe shall be a minimum of 0.1 m with respect to the floor level.
10.22.2 Threaded pipes.
10.22.2.1 Must withstand a working pressure of 2.4 MPa. Pipes shall be seamless carbon steel, schedule 80, and the connections must withstand pressures of 13.74 MPa as a minimum.
10.22.2.2 The depth, length, and other characteristics of the threads must be as indicated in the ANSI B-2.1 standard or similar. The seal of the threaded joints must be made of material resistant to LPG.
10.22.3 Welded pipes.
10.22.3.1 Must withstand a working pressure of 2.40 MPa (24.61 kgf/cm²). Pipes shall be seamless carbon steel, schedule 40, in accordance with ASTM A53 or better, with ANSI B-16.5 flanges, class according to the design pressure, never less than ANSI 300 or similar.
10.22.3.2 The gaskets used in flanged joints shall be made of materials resistant to LPG, constructed of metal or any material with a minimum melting temperature of 1088º K (815º C), except asbestos sheet.
10.23 Piping System Accessories.
10.23.1 Flow indicators. A flow indicator must be provided, at least at the receiving connection (toma de recepción). They may be simple flow direction indicators or of the glass type that allows observation of the gas as it passes. They may be simple or combined indicators with check valve (no retroceso).
10.23.2 Automatic return. In liquid pipes supplied by pump, automatic return valves must be installed.
10.23.3 Flexible connectors. Flexible connectors shall have a maximum length of 1 m. They may be constructed of textile elastomers, metallic materials, or combinations thereof, resistant to the use of LPG and for the required working pressures, fire-resistant.
10.23.4 Pressure gauges. Those used in the piping system must have a minimum reading range of 0 to 2.48 MPa.
10.23.5 Filters. They must be selected to minimize the possibility that solid particles obstruct the lines or damage pumps and compressors. The filter element must be accessible for its maintenance and cleaning.
10.23.6 Valves. Any type of valve may be used for gas shutoff or control for the pressure of the pipe area in which it is installed, suitable for LPG flow control handling. Shutoff valves must be designed to achieve total closure under service conditions and must be fire-safe.
10.23.7 Hydrostatic relief valves. In pipe sections, pipe and hose, or hose where liquid gas may be trapped between two shutoff valves, excepting hose sections for filling portable cylinders, a hydrostatic relief valve must be installed between them.
The discharge of these valves must not be directed toward the storage containers. Connecting discharge pipes directed to a safe location is permitted.
In plants designed for a working pressure of 2.4 MPa, the opening of the valve must be for a minimum pressure of 2.61 MPa and not greater than 3.5 MPa. If the project pressure is higher, they must open at a minimum of 110% and a maximum of 125% of the project design pressure.
10.23.8 Excess flow valves and check (or retention) valves. They must comply with the national standard and, in its absence, with current international standards and be certified by UL or by an accredited body.
10.23.9 Pipes in trenches. The pipe shall have a minimum clearance of 0.1 m in any direction, except to another pipe.
10.23.10 Hoses, flexible connectors, and their connections. They must comply with the specifications in national standards or, in their absence, in similar international standards, for the project design pressure.
10.23.11 Filling manifold (múltiple de llenado). The characteristics of the filling manifold must be specified. The installation of the filling manifold must be firm and allow for its easy repair and maintenance. It must have pressure gauges and the supply line to the manifold must have a control valve and a block valve.
10.23.12 Cylinder filling connection (toma de llenado de cilindros). They must have valves that allow for the changing of hoses. Each filling nozzle (punta de llenado) must be equipped with a quick-closing valve.
Each filling connection must have an automatic shutoff valve for filling, which stops the flow of gas upon reaching the determined weight.
Hoses must be installed in a manner that avoids their deterioration and sharp bends. The filling nozzle must not reach the floor.
10.24 Scales.
10.24.1 Filling scales. Specify the type of scale for weighing and re-weighing or testing of portable cylinders. The scales used for filling cylinders must have a minimum capacity of 0-120 kg and be equipped with an automatic device that actuates the closure of the valve upon reaching the filling weight.
10.24.2 Re-weighing or test scales. There must be a verification scale with automatic indication and a capacity of not less than 100 kg and a resolution of 100g or less, as established by the MEIC.
10.25 Evacuation of gas from cylinders. Specify the portable cylinder evacuation system, indicating its characteristics.
A system must be available that allows for the evacuation of gas from cylinders, to carry out their repair or evacuation due to leakage.
10.26 Receiving, supply, and vehicle supply connections. Describe the types of valves, hoses, connections, control instruments, accessories, and fixing or anchoring details.
10.27 Types of connections and their installation. Each connection with an individual volumetric meter must have an automatic excess flow valve and a check valve (válvula de retención), except for vehicle supply connections. If this is an excess flow type, it must additionally have a remote-acting emergency shutoff valve, which may be hydraulic, pneumatic, electric, or mechanical type. The use of one emergency shutoff valve per multiple of connections shall be acceptable.
Each connection must have a control valve. In vehicle supply connections, this must be of the quick-closing type. Vehicle supply connections must be designed independently of the receiving or supply connections.
10.28 Receiving from railroad tank cars. The receiving connections for railroad tank cars must be located to one side of the spur, at the minimum distances specified in this regulation and at an approximate height of the tank car dome, and be equipped with a fixed ladder allowing easy access.
10.29 Hoses. The connection of the hose for the connection and the position of the vehicle being loaded or unloaded must be designed so that the hose is always free of sharp bends.
Means must exist so that the free end of the hoses does not drag.
10.30 Connection supports. The design of the connections, pipes, connections, and valves must be such that the pipes are firmly held, on perfectly anchored supports, and that in the event of undue stress, there is a fracture point between the hose and the fixed installation, whereby the excess flow or check and control valves remain in place and capable of functioning.
A calculation report must be presented demonstrating that the hose support resists the pull of a truck as indicated in standard INTE 21-1-24-99.
10.31 Fracture point. It must force the discharge of gas upward as far as is foreseeable. Its design must be such that at no point does the pipe have a wall thickness less than 80% of the nominal wall thickness of the pipe of that diameter in schedule 40 (0.8 * (Outer Diameter - Inner Diameter) /2).
10.32 Anti-corrosion protection. The tanks, pipes, and all surface metallic structures must be protected against corrosion by means of an inorganic primer and a finish suitable for the environment where the plant is located.
11.-SPECIFIC REQUIREMENTS OF THE ELECTRICAL PROJECT Description of the concepts used in the design.
The electrical system must comply, at a minimum, with what is established by the CODEC.
11.1 General aspects. A main switch must be placed in an easily accessible location and outside the storage and transfer zones. This switch must be installed in a NEMA-3R box.
It is optional to have an emergency electrical power generation plant in case of service interruptions. Electrical installations must be explosion-proof in the storage zones, transfer zones, and zones with explosive atmospheres and within a 15 m radius of them. The combustible gas detectors used must comply with what is indicated in the reference standard ANSI/ISA-S12.13, Part I, and API RP 500c, or similar.
11.2 Those are defined as Class I (locations where flammable gases and vapors are present), Group D (for atmospheres containing Butane and Propane) of the CODEC.
Electrical installations must be explosion-proof in closed enclosures where transfer operations are carried out and within a 15 m radius of these.
11.3 Instruments, apparatus, and electrical or electronic equipment Within the risk areas, electrical or electronic equipment approved as:
11.3.1 Intrinsically safe. Equipment with this classification may be used in any area. It must comply with what is indicated in the reference standard ANSI/ISA-RP12.6 and API RP 500c or similar.
Those elements that will be exposed to the weather must be adequately protected.
11.3.2 Class I, Division 1. Areas that, under normal operating conditions, may contain an atmosphere with combustible vapors, as defined in Article 500-5, subsection a) of the CODEC.
From the transfer connection (boca de trasiego) up to a radius of 5m, the equipment used must comply with the CODEC and with what is indicated in the reference standard ISA-S12.12 or similar.
11.3.3 Class I, Division 2. Area where LPG is handled or stored, which in normal conditions will be contained in containers or closed systems, from which it can only escape by accidental rupture or failure in those systems, containers, or their accessories, or by abnormal operation of the equipment, as defined in Article 500-5, subsection b).
The area adjacent to a Division 1 area, a radius of 5m up to 15m from the transfer connections (bocas de trasiego), shall also be considered within this Division. The use of equipment accepted in standard ISA-S12.12 for this classification or similar shall be required.
11.4 Risk Area Classification.
Area 5m or less 5m to 15m Vehicle supply connection (boca de abastecimiento vehicular) Division 1 Division 2 Portable cylinder filling connections (bocas de llenado de cilindros portátiles) Division 1 Division 2 Forced ventilation discharge of closed loading dock Division 1 Division 2 Tanker loading or unloading connection (toma de carga o descarga de cisterna) Division 1 Division 2 Gas pipeline trap. Measurement bridges and other apparatus or equipment requiring venting as normal operation. Division 1 Division 2 Trenches below floor level that at any Point are in a Division I area. Division 1 Division 2 Venting of hose, rotary meter or compressor. Storage area for charged portable containers. Division 2 --- Cylinder sales area to the public Division 2 --- Pumps or compressors Division 2 --- Discharge of pressure relief valves or hydrostatic relief valves. Division 2 --- Discharge of compressor relief valve Division 2 --- Parking of loaded vehicles Division 2 --- If any item considered as Division 2 is located within a Division 1 area, the equipment used must be designed for the latter.
The above table is not limiting. Operations carried out in any location shall be classified according to the Class and Division specifications.
11.5 Flammable atmosphere detection. Under normal operating conditions, where gas leaks in the form of liquid vapor may exist (such as: transfer points, transfer equipment, filling manifold (múltiple de llenado), and storage zones), a fixed combustible gas detector must be provided, with automatic alarm actuation for alerting at concentrations exceeding 10% of the lower flammability limit of LPG, and suspension of operations when the detected level exceeds 50% of the lower flammability limit.
11.6 Closed rooms for machinery. Closed rooms for machinery must have flammable atmosphere detection systems.
11.7 Lighting. Lighting must be provided, at a minimum, in accesses, parking areas for delivery vehicles and tankers, loading dock, storage zone, and transfer zones, all explosion-proof.
Lighting poles must be protected against mechanical damage.
11.8 Telephone or intercommunication services. Telephone or intercommunication installations in risk zones must comply with the electrical specification according to the area where they are located.
11.9 Fire electrical system. The fire electrical system and its lighting must be independent of the general system.
11.10 General grounding system. At any point in the system there must be at least one connection to the single grounding system. In the event that an insulating connector is used in any part of the piping system, each of the elements must have a grounding connection.
11.11 Ground connection at filling stations. At each receiving, supply, and vehicle supply station (toma de recepción, suministro y suministro vehicular), there must be means to connect the vehicles to ground before starting the operation.
11.12 Lightning rods. The installation of lightning rods in the plant system must be in accordance with the provisions of the CODEC. The installation of lightning rods in the LPG storage tank area is prohibited.
11.13 Portable cylinder sales area to the user. If there is an electrical installation, all its elements shall be explosion-proof.
12.-SPECIFIC REQUIREMENTS FOR THE FIRE PROTECTION PROJECT 12.1 General. A detailed description of the fire prevention and firefighting systems must be prepared, indicating the main technical specifications, the calculation reports (memorias de cálculo), and the plans.
Plants must have fire prevention and firefighting systems based on a safety analysis in accordance with the conditions of the installations, future expansions, and training and contingency plans for personnel according to standard INTE 21-3-2-96.
The project must be based on the protection of storage, transfer (trasiego), and filling areas, as well as administrative and workshop areas, for which sprinklers (aspersores), hydrants (hidrantes), equipped cabinets (gabinetes equipados), monitor nozzles (pitones monitores), and extinguishers (extintores) must be used; as well as fire detection and alarm systems, LPG detection systems, and flame sensors.
12.2 The expansive wave study must be used as a parameter to evaluate the risk and consequences of an explosion of an L.P. gas storage tank at different distances.
It must indicate the calculation model used, in such a way as to maximize the protection of the health and life of people and the environment.
12.3 Water-based protection system. The entire plant must have a water-based fire protection system, which consists of:
12.3.1 Water tank. Its actual volume must be indicated. In the case of a well, it must be justified with a capacity test (aforo) performed by a competent professional.
The minimum capacity of the water tank must be obtained from the result of multiplying the area in square meters of the largest container in the plant by the density (rate) by 60 minutes, plus the capacity required to cool two adjacent tanks at 10 liters/min/m², plus the demand of the hydrant and monitors required to attack the fire in the burning tank or critical scenario for 60 minutes.
Reducing the size of the water tank for 45 minutes of action is accepted if the following variables are considered:
12.3.1.1 That the response time of the extinguishing units is less than or equal to 15 minutes.
12.3.1.2 That there is an alternate water supply source that, throughout the year, delivers a flow rate equal to or greater than that designed for the plant system; it must be accessible, reliable, and the pumping units must have the possibility of suctioning with two pipes of a maximum length of 3 meters each.
12.3.1.3 Having the approval (visto bueno) of the Benemérito Cuerpo de Bomberos.
12.3.2 Pumping equipment. The firefighting pumping equipment shall be composed of a pump driven by an electric motor (electrical equipment) or one by an internal combustion diesel engine (internal combustion equipment).
The use of electrical pumping equipment is accepted as long as there is an emergency electric generator.
As a mandatory complement to the firefighting pumping equipment, a siamese connection (toma siamesa) shall be installed outside the plant to directly inject the water provided by the fire department into the firefighting network; in addition, next to this siamese connection, there must be a direct water intake to the base of the firefighting water tank, with an N.S.T. thread coupling and an outlet diameter of 114 mm. The diameter of this pipe may not be less than 150 mm.
The pumps must be specified in accordance with national regulations or, failing that, with the NFPA 20 standard or similar and certified by U.L. (Underwrite Laboratories) or another recognized accredited body.
12.4 Special characteristics of the pumps.
12.4.1 Centrifugal type pumping unit, which must have an operating reserve that allows continuous work for a period of 8 hours.
12.4.2 Said pump must comply with the characteristic curve of fire pumps (reference Standard NFPA 20) which indicates the following:
12.4.2.1 The curve must always be descending, presenting the maximum pressure at zero flow.
12.4.2.2 Pass through a point, called nominal, in such a way that:
12.4.2.2.1 At zero flow, the pressure must not exceed 140% of its nominal pressure.
12.4.2.2.2 At 150% of its nominal flow, the pressure must be greater than 65% of its nominal pressure.
12.4.3 Horizontal centrifugal pumps shall always work under positive head (positive suction). If the pump does not work under positive head (suction by elevation), a vertical centrifugal pump must be used. Therefore, horizontal centrifugal pumps with the possibility of losing prime (descebamiento) are NOT permitted, even if they have priming reservoirs with automatic water replenishment.
12.4.4 It must have a relief valve and a test manifold (múltiple para pruebas). They must be automatic start by pressure drop.
12.4.5 The firefighting system(s) must have auxiliary pressurizing pumps (bombas auxiliares presurizadoras).
12.5 Pumping capacity. The minimum pumping capacity of the electrical or internal combustion firefighting equipment must be at least 10 l/min/m² of the total area of the largest tank in the plant, plus 2 adjacent tanks of the same size, plus the demand of the hydrant and monitors required to attack the fire in the burning tank or critical scenario.
12.6 Pumping pressure. When any of the firefighting equipment is in operation, whether electrical or internal combustion, the minimum pressure measured at the pump discharge header (cabezal de descarga) must be 0.588 MPa, when the flow in said header corresponds to the accumulated cooling flow rate on the container with the largest area in the plant and two monitors with nozzles and valves fully open.
12.7 Hydrants and Monitors. A hydrant system must be installed with adjacent cabinets containing the necessary minor equipment: 63.5 mm diameter hoses with a maximum length of 30 m or stationary monitors (monitores estacionarios) of the heart type or similar with one or two racks (handles), with a nozzle (the minimum number of monitors shall be two) that allows spraying fog in such a way as to cover 100% of the storage and transfer (trasiego) areas.
12.8 Tank cooling system. A fixed water spray cooling system must be installed on all tanks (recipientes), guaranteeing total cooling of the surface, in accordance with standard INTE 21-1-24-99.
The water must directly wet 100% of the surface of the tanks.
12.9 Extinguisher-based protection system. In accordance with the following table, protection by means of extinguishers must be carried out with an adequate selection for the foreseeable fire class and determining the risk factor in each area:
12.9.1 Table 1. Risk Units Area Risk Factor Class Filling bay (Andén de llenado) High 0.3 BC Warehouses and storerooms (Bodegas y almacenes) Moderate 0.2 ABC Pumps and compressors High 0.3 BC Receipt and metering hut (Caseta de recibo y medición) High 0.3 BC Guardhouse (Caseta de vigilancia) Low (Leve) 0.1 ABC Kitchen High 0.3 ABC Dining room Moderate 0.2 ABC Parking Moderate 0.2 ABC Offices Moderate 0.2 ABC Power plant (Planta de fuerza) Moderate 0.2 BC Sanitary services Low (Leve) 0.1 ABC Electrical panel Moderate 0.2 ABC Mechanical Workshop Moderate 0.2 ABC Receiving, Supply stations (Tomas de recepción, Suministros) High 0.3 BC Storage area (entry or exit coupling area) High 0.3 BC The detailed surfaces or elements must be comprised within circles drawn from a location that will have the acceptance of the Benemérito Cuerpo de Bomberos for the placement of the extinguisher and with the radius corresponding to the area risk factor, type, and capacity of the extinguisher. The circle cannot cross walls of any type of material. When neighboring circles are comprised within an area, they must overlap or at least touch each other.
12.9.2 Extinguishing capacity units and coverage radii:
Coverage radius in meters applied to risk factor Type of Capacity Units Risk Factor 0.1 Risk Factor 0.2 Risk Factor 0.3 Extinguisher Nominal (Kg.) of Extinguishment A BC Dry Chemical 9 20 7.87 5.64 4.61 Powder. 3 20 7.87 5.64 4.61 Sodium Bicarbonate 50 80 15.73 11.28 9.21 Base (BC) 68 80 15.73 11.28 9.21 159 80 15.73 11.28 9.21 Dry Chemical 9 40 11.12 7.98 6.51 Powder. 13 60 13.63 9.77 7.98 Potassium Bicarbonate 50 160 22.25 15.96 13.03 Base (BC) 68 160 22.25 15.96 13.03 159 160 22.25 15.96 13.03 Dry Chemical 9 4 30 9.63 6.91 5.64 Powder. 13 6 40 11.12 7.98 6.51 Monoammonium Phosphate 50 20 120 19.27 3.82 11.28 Base (ABC) 68 20 120 19.27 13.82 11.28 159 20 120 19.27 13.82 11.28 Carbon 9 10 5.56 3.99 3.26 Dioxide (BC) 23 16 7.04 5.05 4.12 34 20 7.87 5.64 4.61 45 30 9.63 6.91 5.64 For capacities in kilograms different from those indicated, the extinguishment units must be interpolated according to the nearest capacity.
When two or more installations occupy a common surface, this must be considered as a single one. The highest risk factor is used.
For other extinguishers, the extinguishment units given by the Benemérito Cuerpo de Bomberos must be used, determining the number of extinguishers required in each of the areas, for which the following formula shall be used:
S surface in square meters of area x area factor = number of extinguishers Extinguishment Units Extinguishers shall have a minimum nominal capacity of 9 Kg and must be of the dry chemical powder type ABC or BC, with the exception of those required for electrical control panels, which may be carbon dioxide type C.
12.9.3 Placement of extinguishers In the installation of extinguishers, the following must be complied with:
12.9.3.1 They must be located in the place with the greatest visibility of the area to be covered.
12.9.3.2 The support of this equipment or its upper part must be at a height of 1.25 m from the ground level.
12.9.3.3 Have on its rear part a laminated wood or metal panel, painted red on its background and white or yellow transverse stripes; said panel must exceed the dimensions of the extinguisher in order to make it more noticeable.
12.9.3.4 In storage structures where the eaves (esquivas) are high, arrows must be located in the upper sections of the bays, exactly above the site where the portable extinguishers are installed, in order to quickly locate them from any point in these bays. These arrows must be painted red on their background and with white or yellow transverse stripes.
12.9.3.5 Extinguishers must receive adequate maintenance that includes:
12.9.3.5.1 Inspection (at least once a year).
12.9.3.5.2 Test.
12.9.3.5.3 Location without obstacles in front, clean, and visible.
12.9.3.5.4 Written control on an attached card or separate control.
12.9.3.5.5 Perform the corresponding hydrostatic tests.
12.9.4 Firefighting system Prior to the authorization for the plant to operate, the Benemérito Cuerpo de Bomberos must inspect and test all fire prevention and firefighting systems. A certified copy of the final results must be delivered to the DGTCC.
The person responsible for the operation and maintenance of the fire prevention and firefighting systems must be the Company Regent (Regente de la empresa).
13.-SPECIFIC REQUIREMENTS FOR THE PROCESS PROJECT 13.1 Flow diagram and process plans. All the equipment required in the unit operations and processes, their connections, and the material and energy balances that occur in the process must be indicated. In the plans, a nomenclature table and a material and energy balance table must be presented according to current regulations.
13.2 Risk analysis. The evaluation of each risk (expansive wave, heat wave, etc.) must be analyzed and plotted on a cartographic sheet at a scale of 1:50000 (one to fifty thousand) and 1:10000 (one to ten thousand), in the form of a concentric circle, and the buildings subject to risk must be highlighted according to their importance. In addition, the risk incidence table must be prepared with detail of effects on buildings and effects on animal life for each major risk, complying with current legislation.
13.3 Proposals for risk mitigation. The various alternatives that can be implemented to mitigate or, if applicable, eliminate the risk that LPG may cause in the facilities and the environment must be presented in the corresponding plans and tables.
13.4 Operations manual. It must contemplate all relevant aspects of the operation and handling of LPG in the facilities. The emergency protocol must be included, according to the regulations of the Comisión Nacional de Emergencias.
14.-COMPLETION OF WORK 14.1 Completion tests. Upon completion of the construction of the plant, the DGTCC or whoever it designates must witness the tests stated below, noting the test results and all values and operating conditions in the Logbook (Bitácora). The annotation of the results must be signed by the professional performing the test, a representative of the company, and the representative of the DGTCC.
14.2 Piping system. When the pipes are welded, the welds must be inspected during the leakproofness test (prueba de hermeticidad).
Once the piping system is completed, the leakproofness test must be carried out for a minimum period of 60 minutes, without presenting leaks.
The pipe test must be:
14.2.1 Hydraulic at a pressure of 1.5 times the design pressure (presión de proyecto) or 3.6 MPa, whichever is greater; 14.2.2 Pneumatic at the working pressure.
In both cases, the standard ASTM E 1003 is taken as a reference.
The sequence of execution of these tests must be: first the hydrostatic test and then the pneumatic test.
14.3 Electrical system. The operation of the electrical system must be approved by the electrical engineer responsible for its design. Prior to the authorization for the plant to operate, a certified copy of the approval of the system's operation must be submitted to the DGTCC.
14.4 Firefighting system. The operation of the firefighting system must comply with the provisions of point 12.9.4 of this regulation.
14.5 Measurements and dimensions. All dimensions must be verified using the appropriate instrument.
14.6 Storage tanks. The tests of the storage tanks must be in accordance with the provisions of point 10.14 of this regulation.
14.7 Notification of completion. Once all tests have been satisfactorily completed, the owner or legal representative must request the operating permit (permiso de funcionamiento) from the DGTCC.
14.8 Work modifications during construction. If modifications to the original project are required during the execution of the work, these must be recorded in the plans and reports (memorias). They must be notified to the DGTCC for its approval, and the updated plans and reports must be delivered.
15.-OPERATING SPECIFICATIONS 15.1 The plant shall be subject to periodic supervisions at any time and without prior notice by the DGTCC, in order to verify the provisions of this regulation.
15.2 Within the plant, there must be a suitable site where the operations manuals, maintenance manuals, technical data sheets of the equipment and storage tanks, inspection records, physical tests performed, and contingency plan are located, in accordance with the provisions of this regulation. This documentation shall be of unrestricted access to the control of the DGTCC.
15.3 The plant's operations, preventive maintenance, and contingency manuals must contemplate at least the following aspects:
15.3.1 Logbook (Libro de bitácora). In it, maintenance operations, modifications made, and observations by the DGTCC shall be recorded periodically.
15.3.2 Maximum working pressure. With the pump or compressor operating, the design pressure of the project must not be exceeded.
15.3.3 Automatic return. Its adjustment for operation must not exceed the maximum design pressure of the system or that established by the pump manufacturer, whichever is less.
15.3.4 Receiving, supply, and vehicle supply stations (Tomas de recepción, suministro y abastecimiento vehicular). Vehicles in receiving, supply, and vehicle supply areas must be connected to ground before being able to perform any transfer maneuver (maniobra de trasiego) and have spark arrestors (matachispas) on their exhaust pipe.
Lights and other electrical equipment must not be used during the receipt and transfer of LPG. Performing repairs on vehicles in any area of the plant is prohibited, except in the area designated for such purposes.
15.3.5 Vehicle supply station (Toma de abastecimiento vehicular). Vehicle supply stations must operate exclusively for vehicles of the company. The location of these stations must not obstruct vehicle circulation when they are in use.
15.3.6 Hoses. It must be observed that during the time hoses are not in service, their couplers are kept with the respective protector.
Hoses must have a breakaway valve (brake valve) at the dispenser outlet.
The hose that is permanently connected to the station must have a manually operated valve at its free end.
15.3.7 Tools, equipment, and workers' clothing: In risk areas, only non-sparking tools (herramientas antichispa) and equipment suitable for use in them may be used, unless the pertinent precautions are taken to ensure that the environment does not contain gas vapors in concentrations greater than 10% of the lower flammability limit, detected with sensors for that purpose.
Workers must use appropriate clothing. The use of shoes with external metal protectors, nailed soles, nylon or similar clothing, combs, or other objects capable of generating static electricity is prohibited.
The lighting means and hand lamps used shall be in accordance with the area, as defined in point 11.4. Any type of fire-based lighting is prohibited. Flashlights shall be explosion-proof.
15.3.8 Operation of motor vehicles in risk areas. Within Division 1 and 2 areas, the motor vehicles that operate must:
15.3.8.1 Have a spark arrestor (matachispas) placed on the exhaust pipe.
15.3.8.2 If the vehicle's engine is not used to move the pump or compressor performing the transfer, the engine must be turned off during loading or unloading. If it is used, the operator must remain next to the controls during the maneuver.
15.3.9 Operation of the filling hose valve. The outlet valves of the manifold to which the cylinder filling hoses are connected must always remain open, except in the case of hose replacement.
15.3.10 Pipes in trenches. Drainage of rainwater must be provided for and they must be adequately protected against corrosion.
15.3.11 Pressure relief valves. Protective caps must be placed on the upper part of the vent pipe.
15.3.12 Hydrostatic relief valves. If their placement does not allow rainwater to accumulate, they do not require a protective cover.
15.3.13 Firefighting and safety. For the purpose of increasing the water availability time, the operation plan of the firefighting system must take into account the following aspects:
15.3.13.1 Adequate maintenance of the firefighting equipment and network.
15.3.13.2 Periodic review of the water supply and its operating condition.
15.3.13.3 Use of monitors in fog position.
The system must have annual approval by the Benemérito Cuerpo de Bomberos.
15.3.14 Protection equipment: An accessible place must be available for the protection equipment that the Benemérito Cuerpo de Bomberos defines for the personnel in charge of handling the main firefighting means.
The plant must have at least three sets of equipment for the use of the personnel responsible for its operation.
15.3.15 Emergency preparations.
15.3.15.1 Equipment. There must be a first aid kit, equipped according to the scope of Law No. 6727 or, failing that, duly certified by a person or entity competent in medicine or by the Medical Section of the Benemérita Cruz Roja Costarricense.
15.3.15.2 Alarm system. There must be an audible and visual alarm system for emergencies, by means of which all personnel are effectively and timely warned of an emergency situation. There must be combustible gas detectors and flame detectors in all gas operation areas. The flame detector in the storage area must open the supply valve to the sprinklers (relief valve).
15.3.15.3 Parking. Vehicle parking within the plant must not obstruct access to the storage areas, transfer areas, firefighting equipment, main electrical switch, entry or exit of the plant, and emergency exits.
Parking areas must be designed to allow adequate and safe vehicle movement; likewise, all motor vehicles must be parked in reverse in the areas defined for this purpose; this will facilitate emergency movements.
15.3.15.4 Cleanliness. Parking areas, circulation zones, and protection zones for storage and transfer must be kept clear, free of trash or any combustible material.
15.3.15.5 Public access. The public shall only have access to the offices and this shall be in a controlled manner.
15.3.15.6 Public sales area. The sales prices must be visible to the public.
15.3.15.7 Ornamental vegetation. Ornamental vegetation must always be kept green, to minimize fire risks.
15.3.15.8 Test of safety valves, check valves (non-return), and excess flow valves. The safety valves, excess flow valves, and check valves of the storage tanks must be tested or replaced with new ones every 5 years, noting in the Logbook (Bitácora) the test date, results, and replacements made.
15.3.15.9 Flanged pipe gaskets. When a flanged joint is opened, the gaskets must be replaced.
15.3.15.10 Flammable atmosphere tests. All points susceptible to leaks must be checked with a flammable atmosphere detector. Standard ANSI/ISA-S12.13 or similar is used as a reference; this test must be performed by the Regent at least every six months. A certified copy of its results must be submitted to the DGTCC. In the event of detecting leaks within a radius of 1 m from the leak point or at the nearest vehicle circulation point if this is less, they shall be classified and addressed as follows:
Lower Flammability Limit Classification Attention Less than 10% Non-risky At the first opportunity that allows the necessary time.
Greater than 10% but less than 50% Non-risky Immediate Greater than 50% Risky Suspension of operation Immediate repair Brigade surveillance Continuous use of combustible gas detector during repair.
Report of the situation to the 911 Emergency System, in a preventive manner 15.3.15.10.1 If the detected leak originates in the body of a transfer hose and the concentration of combustible gas is less than 10% of the lower flammability limit, it must be replaced at the first suspension of operations.
15.3.15.10.2 If the combustible gas concentration reading is greater than 10%, it must be removed from operation immediately. If immediate replacement is not possible, the control valves shall be closed and it shall be depressurized.
16.-STORAGE MEANS FOR THE DEVELOPMENT OF THE L.P. GAS FILLING, MARKETING, AND DISTRIBUTION ACTIVITY 16.1 The portable cylinders, stationary tanks, and tanker trucks used by L.P. gas operators in the L.P. gas filling, marketing, and distribution processes must comply with international safety and quality control guidelines. The following standards can be used as a reference:
16.1.1 D.O.T.
16.1.2 A.S.M.E.
16.2 The reference standard must appear on the manufacturer's technical data sheets, or failing that, they must be endorsed by internationally accredited inspectors for these purposes.
16.3 Portable cylinders, tanker trucks, and stationary tanks used in the national market by L.P. gas filling companies.
16.4 Every cylinder, whatever its capacity, and whether portable or stationary, must have a serial number placed by the manufacturer, which will allow keeping a control for inventory or to control those that are repaired, or those that are permanently taken out of service.
16.5 Each company must identify its cylinders with its emblem or particular color.
16.6 On the body of stationary tanks and tanker trucks, the company name (razón social), trade name, or trademark of each filling company shall be indicated.
16.7 Filling companies shall place a safety seal on each of their cylinders at the time of completing the L.P. gas filling process.
16.8 The seal shall be plastic with a hot-air closure, which will mold against the valve and cover it completely so that the seal must be necessarily broken to operate it, no matter how slight the turn given to it.
16.9 The portable cylinders used by L.P. gas operators must be inspected upon entering the filling bay, and assessed to determine if, and in case of presenting damage, they can be repaired or must be permanently taken out of service.
16.10 Each repaired cylinder must be authorized by the Regent for its reuse, who will keep a control for this purpose.
16.11 Stationary cylinders must be inspected and certified every five years by an inspector, duly accredited for this purpose.
17.-TECHNICAL DOCUMENTATION FILE A project file must be kept at the plant, which shall contain reports (memorias), plans, and operation and maintenance programs, as well as all documentation supporting the registration of the installations. The technical documents must be approved by the DGTCC.
18.-MODIFICATIONS.
Prior to carrying out a remodeling or expansion of the plant, the respective project must be submitted to the DGTCC for its respective authorization.