Occupational Safety Training Document for the Petroleum Industry

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The materials for the occupational safety training course for the gasoline and oil industry equip workers with safety knowledge and prevention of hazards when working in the petroleum sector.

I. CLASSIFICATION OF GASOLINE STATIONS

Gasoline stations are classified according to the total storage capacity of gasoline and oil as specified in the table below.

Type of station	Total capacity (m³)
	On-land gasoline stations and fixed on-water gasoline stations	On-water gasoline stations (barges, steel-hulled vessels, and other floating means)
Grade 1	From 150 to 210	From 100 to 200
Grade 2	Over 100 to under 150	From 16 to under 100
Grade 3	Less than or equal to 100	Less than 16

 

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II. GENERAL REQUIREMENTS IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. The construction site or mooring location of a gasoline station, and the utility services belonging to the station, must ensure compliance with traffic safety, construction, environmental hygiene, and fire prevention and fighting requirements as per current laws.
2. The use of technological equipment for payment must be carried out outside the hazardous area, or the equipment must be of an explosion-proof type.
3. For gasoline stations that also sell bottled liquefied petroleum gas within the station area, the safety requirements specified in TCVN 6223:2017 Liquefied petroleum gas (LPG) stores – General safety requirements must be complied with.
4. Gasoline stations must develop an oil spill prevention and response plan in accordance with legal regulations.
5. Comply with fire prevention and fighting requirements as stipulated by the law on fire prevention and fighting.
6. Regulations for on-land gasoline stations
   • In addition to the requirements from Clause 1 to Clause 5 of this Article, on-land gasoline stations must meet the following requirements:
   • The distance between construction items within the gasoline station must not be less than specified in the Table.

Item	Underground storage tank (m)	Dispensing pump (m)	Sales building (m)
1. Underground storage tank	0.5	Not specified	2
2. Sealed fill pipe	Not specified	Not specified	3
3. Dispensing pump	Not specified	Not specified	Not specified
4. Other construction items that may generate sparks	2	2	2
Notes:
1) No safety distance is specified between the storage tanks and the side of the sales building that has no windows or doors.
2) No safety distance is specified between the dispensing pump and a building wall, but it must ensure convenience for installation, operation, and repair.

 

• • The structure and materials for the sales area and other construction items must have a fire-resistance rating of Grade I or II as specified in QCVN 06:2020/BXD National Technical Regulation on Fire Safety for Buildings and Constructions; they must ensure stable load-bearing capacity against the effects of loads and environmental corrosion throughout the service life of the structure.
  • Roads and parking areas for vehicles entering for purchasing and receiving goods must meet the following requirements:
    • The width of a single traffic lane within the station must not be less than 3.5 m. A two-lane road must not be less than 6.5 m.
    • The parking area for dispensing and receiving petroleum products must not be paved with asphalt-containing materials.
  • A gasoline station adjacent to other constructions must have a surrounding wall of at least 2.2 m in height (relative to the ground level inside the station), made of non-combustible material. For civil works and other constructions outside the station (excluding production sites with open flames or sparks and public works) with a fire-resistance rating of Grade I or II, if the wall facing the gasoline station is a firewall, no safety distance is required from that item to the station’s fence, but current construction regulations must be complied with.
  • If the area where dispensing pumps are located has a canopy, the height of the canopy must not be less than 4.75 m.

7. Regulations for on-water gasoline stations
   • In addition to the requirements from Clause 1 to Clause 5 of this Article, on-water gasoline stations must meet the following requirements:
     • The structure and materials for the sales area and other construction items must have a fire-resistance rating of Grade II or III as specified in QCVN 06:2020/BXD National Technical Regulation on Fire Safety for Buildings and Constructions or QCVN 72:2013/BGTVT National Regulation on the Classification and Construction of Inland Waterway Vessels.
     • There must be a flood and storm prevention plan; a storm-safe mooring location must be determined as required. For fixed-built gasoline stations, there must be measures for bracing, mooring, and evacuation to avoid storms as regulated.

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III. CLASSIFICATION OF HAZARDOUS ZONES AT GASOLINE STATIONS

The classification of flammable and explosive hazardous zones for construction items at on-land gasoline stations is specified in the following table.

Name of construction item	Hazardous Zone Classification
1. Areas for storage and sale of petroleum products:
Gasoline storage tank, fill pipe, manhole	See Figures 2, 3, 4
Breather valve	See Figures 5, 6
Gasoline dispensing pump	See Figure 7
Gasoline dispensing pump when serving vehicles	See Figure 8
Vehicle when receiving product at the gasoline station	See Figures 9, 10
2. Areas for storage and sale of other petroleum products:
Storage for liquefied petroleum gas cylinders	Z1
Lubricant storage	Z2
3. Other construction items	Non-hazardous area
Note: The definition of flammable and explosive hazardous zones, and detailed figures on the classification of hazardous zones can be found in Appendix 1 issued with this Regulation.

 

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IV. GASOLINE STORAGE TANKS IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. For on-land gasoline stations
   • The material for gasoline storage tanks must be petroleum-resistant and non-combustible.
   • The installation of gasoline storage tanks at the station must comply with the following regulations:
     • Above-ground installation of gasoline storage tanks is not permitted.
     • Storage tanks and manholes must not be installed in or under sales buildings.
     • When installing gasoline storage tanks, the possibility of buoyancy must be considered, and measures must be taken to prevent the tank from floating.
     • The area around the storage tank must be filled with sand or fine soil with a thickness of not less than 0.3 m.
     • Tanks installed under roadways must have measures to protect the tank structure.
     • For tanks made of non-conductive materials, measures must be taken to eliminate static electricity during product loading and unloading.
   • The outer surface of underground steel tanks must have an anti-corrosion coating of a grade not lower than the reinforced level specified in TCVN 4090:1985 Petroleum depots, stations and pipelines – Main pipelines for oil and oil products – Design standard.
   • Safety distances from gasoline storage tanks to external structures are specified in the Table.
2. For on-water gasoline stations
   • The material for gasoline storage tanks must be petroleum-resistant and non-combustible.
   • For tanks made of non-conductive materials, measures must be taken to eliminate static electricity during product loading and unloading.
   • The storage tank area must be regularly cleaned and have “No Unauthorized Entry” signs posted.

Article 9. Gasoline Dispensing Pumps

1. For on-land gasoline stations.
   • The installation location of dispensing pumps in a gasoline station must comply with the following requirements:
     • Pumps must be placed in well-ventilated locations. If a pump is placed indoors, it must be in a separate room with ventilation measures and doors that open outwards.
     • Ensure that vehicles can easily stop alongside the pump without obstructing other traffic entering or exiting the station.

• • The dispensing pump must be placed on a pump island. The pump island must be designed in accordance with the following requirements:
    • The height must be at least 0.15 m above the parking area surface.
    • The width must not be less than 1.0 m.
    • The end of the pump island must be at least 0.5 m from the edge of the canopy support column or the pump itself.
  • Safety distances from the dispensing pump to external structures are specified in the following Table.

Construction Item			Safety distance (m) {not less than (2), (3)}
			Grade 1 Station	Grade 2 Station	Grade 3 Station
Production site with open flame or sparks			18	18	18
Place of public assembly (4)			50	50	50
Civil works and other constructions outside the station (5)	Fire-resistance rating (1)	I, II	5	5	5
		III	15	12	10
		IV, V	20	14	14
Power cable line			– According to current regulations on electrical grid safety corridors.
Telecommunication cable line			– According to current regulations of the telecommunications industry.
Notes:
(1) Fire-resistance rating of the structure according to QCVN 06:2020/BXD National Technical Regulation on Fire Safety for Buildings and Constructions.
(2) The distance for tanks is measured from the edge of the manhole (tank neck).
(3) The distance for dispensing pumps is measured from the center of the pump.

 

• • • The safety distances in Table 4 may be reduced by 30% if the station is equipped with a gasoline vapor recovery system.
    • The safety distance from storage tanks and dispensing pumps to places of public assembly is reduced to 25 meters (17 meters if a vapor recovery system is installed) if the gasoline station is equipped with a fixed or semi-fixed firefighting system.
  • For on-water gasoline stations.
    • The installation location of dispensing pumps in a gasoline station must comply with the following requirements:
      • Pumps must be placed in well-ventilated and convenient locations.
      • Ensure that vessels can easily stop alongside the pump without obstructing other traffic entering or exiting the station.

Construction Item			Safety distance (m) {not less than (2), (3)}
			Grade 1 Station	Grade 2 Station	Grade 3 Station
1. Piers, ferry terminals, ports, bridges, aquaculture areas, markets			100	100	70
2. Production site with open flame or sparks			50	50	30
Civil works and other constructions	Fire-resistance rating	I, II	15	12	5
		III	20	15	10
		IV, V	25	20	12
Note: In the case of civil works and other constructions in the table with a minimum fire-resistance rating of Grade I, II, or III, and the wall facing the gasoline station is a firewall, no distance is specified.

 

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V. PROCESS PIPING IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. Process piping in a gasoline station must be made from petroleum-resistant and non-combustible materials. The inner diameter of the pipe must be at least 32mm. For steel pipes, anti-corrosion measures must be applied. For pipes made of non-conductive materials, measures to eliminate static electricity during product loading and unloading must be considered.
2. Joints on process piping must be tight, and mechanically and chemically durable.
3. Parallel process pipes must be spaced at least one larger pipe diameter apart. For parallel pipes with flanged connections, the distance between the pipes must be at least the flange diameter plus 3 cm. For pipes with staggered flanged connections, the minimum distance from the outer edge of the flange to the outer edge of the nearest pipe is 3 cm.
4. The distance from the lowest point of the gasoline dispensing pipe inside the storage tank to the bottom of the tank must be at least 15 cm.
5. Gasoline must be loaded into storage tanks using a closed-fill method. The fill pipe into each tank must extend to the bottom of the tank and be no more than 20 cm from the bottom.
6. All gasoline storage tanks must be equipped with breather valves. A common breather valve may be installed for tanks containing the same group of fuel.
7. For on-land gasoline stations, in addition to complying with the requirements from Clause 1 to Clause 6 of this article, the process piping must comply with:
   • Process piping within the station must be laid underground directly in the soil or in a covered trench, with the pipe surrounded and tightly packed with sand. The thickness of the sand packing must be at least 15 cm (If the pipe is in a trench, the sand packing thickness must be at least 5 cm). Above-ground installation of process piping is permitted in locations not affected by people and passing vehicles. For on-water gasoline stations, it is only necessary to ensure that the process piping within the station is placed in locations not affected by people and passing vehicles.
   • Process piping in areas where cars pass must be placed in an underground casing pipe or in a sand-filled trench with a cover. Both ends of the casing pipe must be sealed. The burial depth of the pipe must ensure it does not affect the durability of the entire piping system.
   • For underground tanks, the process piping must slope towards the storage tank, with a slope that ensures the pump’s suction capability.
8. For on-water gasoline stations, in addition to complying with the requirements from Clause 1 to Clause 6 of this article, the process piping must comply with:
   • Process piping within the station must be placed in locations not affected by people or passing vehicles.
   • The distance from the suction inlet of the gasoline dispensing pipe to the bottom of the storage tank must be at least 15 cm.
   • For suction pump technology, when one storage tank supplies gasoline to multiple dispensing pumps, each pump must have a separate dispensing pipe, and the pipe inside the storage tank must have a one-way valve.
9. Requirements for breather valves
   • The technical specifications must be suitable for the structure, capacity, and operating conditions of the storage tank. The discharge opening of the breather valve must be directed horizontally or upwards.
   • The inner diameter of the pipe connecting the tank to the breather valve must not be less than 50 mm.
   • The breather valve of a gasoline station must have a flame arrester, a separate direct lightning strike protection system, or be within the protection zone of the station’s common direct lightning strike protection system.
   • The breather valve of an on-land station, in addition to complying with the requirements from point a to point c of this Clause, must comply with:
     • In case the breather valve connecting pipe is installed along the station’s boundary wall: the pipe may be adjusted to a 45° angle vertically, ensuring the distance from the breather valve to the inner edge of the wall towards the station is not less than 2 m. This distance is reduced to 0.5 m if the station has a gasoline vapor recovery system installed.
     • In case the breather valve connecting pipe is installed along a wall or column of a building, the discharge opening of the valve must be at least 1 m higher than the roof or eaves and at least 3.5 m away from any type of opening.

• • The breather valve of an on-water station, in addition to complying with the requirements from point a to point c of this Clause, must comply with: The discharge opening of the breather valve must be at least 1 m higher than the roof or canopy of the station.

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VI. ELECTRICAL SYSTEM IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. For on-land gasoline stations in petroleum industry safety documents

• Safety requirements in the design, installation, and use of electrical equipment for gasoline stations must comply with TCVN 5334:2007 Electrical equipment for petroleum and petroleum product depots – Safety requirements for design, installation and use.
• If a generator is used in the gasoline station area, its location must be outside the flammable and explosive hazardous zone. The generator’s exhaust pipe must have a spark arrester and be insulated.
• Electrical wires and cables installed in a gasoline station must meet the following requirements:
  • Wires and cables must use copper conductors with synthetic plastic insulation.
  • Electrical cables must comply with the technical requirements of the current National Technical Regulation.
  • Underground power cables laid directly in the soil must be copper-cored, insulated with petroleum-resistant synthetic plastic, and have a protective steel sheath.
  • If a power cable does not have a protective steel sheath when laid underground, it must be run through a steel pipe (in areas where cars and motorcycles pass) or a plastic pipe (in areas without vehicle traffic), or laid in a separate trench filled with sand and covered.
  • It is forbidden to lay power cables in the same trench as gasoline pipelines.
  • All underground power cables, when crossing roads, construction items, and intersecting with gasoline pipelines, must be run through a protective steel pipe. The ends of the pipe must extend 0.5 m beyond the edge of the structure on each side.
  • Power and lighting cables must not be run in the same conduit as control, communication, or signal cables.
  • Conduits for cables must be connected using threaded joints. When joining or branching wires and cables, explosion-proof junction boxes and distribution boxes must be used.

• Cables used for automation, information, and signal equipment must comply with point c of clause 1 of this Article.
• Equipment installed in hazardous zones Z0 and Z1 must be of an explosion-proof type.
• There must be a direct lightning strike protection system for the construction items in the station.
  • The grounding system for direct lightning strike protection must have a grounding resistance not exceeding 10 Ω. The height of the lightning rod must ensure that the breather valve is completely within its protection zone. If the breather valves are placed high and not within the lightning protection zone of surrounding tall structures, they must be protected from direct lightning strikes by lightning rods that are equipotentially bonded. The tip of the lightning rod must be at least 5 m away from the breather valve.
• To protect against induced lightning and static electricity, steel storage tanks must be connected with at least two metal wires each to the grounding system for induced lightning and static electricity protection. The grounding resistance of this system must not exceed 10 Ω.
• At gasoline receiving locations, there must be an anti-static grounding device for grounding the vehicle when receiving gasoline into the storage tank.
• The safety grounding system must have a grounding resistance not exceeding 4 ohms. All non-current-carrying metal parts of electrical equipment and dispensing pumps must be safety-grounded.
  • This grounding system must be 5 m away (distance in the ground) from the direct lightning strike protection grounding system.
  • When combining the safety grounding system with the direct lightning strike protection grounding system, the required grounding resistance must not exceed 1 Ω.
• The design of lightning protection and grounding for a gasoline station must comply with current regulations on the design and construction of lightning protection for petroleum depots.

2. For on-water gasoline stations in petroleum industry safety documents

• Safety requirements in the design, installation, and use of electrical equipment for gasoline stations must comply with TCVN 5334:2007.
• If a generator is used in the gasoline station area, its location must be outside the flammable and explosive hazardous zone. The generator’s exhaust pipe must have a spark arrester and be insulated. The generator location must have a partition separating it from the tank area, storage compartment, or sales area.
• Electrical wires and cables installed in a gasoline station must meet the following requirements:
  • Wires and cables must use copper conductors with synthetic plastic insulation, run through a conduit.
  • Electrical cables must comply with the technical requirements of the current National Technical Regulation.
  • Power and lighting cables must not be run in the same conduit as control, communication, or signal cables.
  • Conduits for cables must be connected using threaded joints. When joining or branching wires and cables, explosion-proof junction boxes and distribution boxes must be used.
• For cables used for automation, information, and signal equipment, they must comply with point c of clause 1 of this Article.

There must be a direct lightning strike protection system for the construction items in the station. The height of the lightning rod must ensure that the breather valve is completely within its protection zone. If the breather valves are placed high and not within the lightning protection zone of surrounding tall structures, they must be protected from direct lightning strikes by lightning rods that are equipotentially bonded. The lightning protection system must be periodically inspected annually according to current regulations.

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VII. FIRE FIGHTING EQUIPMENT IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. At the gasoline station, fire prevention and fighting regulations, firefighting commands, “No Fire” signs, and “No Mobile Phone Use” signs must be posted in conspicuous and easily readable locations.
2. The gasoline station must be equipped with a sufficient quantity of suitable initial firefighting equipment as specified in TCVN 3890:2009 Fire protection means for buildings and constructions – Equipment, arrangement, inspection and maintenance, and as specified in this regulation.
3. Based on the fire hazard properties of the substances and materials in each section of the gasoline station, appropriate firefighting equipment shall be equipped and arranged.
4. The quantity of initial firefighting equipment and tools is specified in the following Table.
   • Depending on the specific conditions of the station, powder extinguishers may be replaced with foam or CO2 extinguishers suitable for each type of combustible material.
   • The number of fire extinguishers in parentheses () is the number of reserve extinguishers. Reserve extinguishers are to be located in a separate cluster inside the station.
   • The station must have a suitable means of storing water to promptly wet fiber blankets in the event of a fire.

   • Name of station item	Powder extinguisher (unit)		Fiber blanket (unit)
     	≥25 kg	≥4 kg
     1. Tank cluster of Grade 1, 2 station	2	2	4
     2. Tank cluster of Grade 3 station	1	2	2
     3. Dispensing pump and gasoline receiving point		2	5
     4. Car wash, vehicle maintenance area		1 (1)
     5. Lubricant and other product sales area		1 (1)	1
     6. Sales transaction office		1 (1)
     7. Security room		1 (1)
     8. Generator, transformer station	1	2

      

5. The arrangement of firefighting equipment and tools must ensure they are:
   • Easy to see.
   • Easy to access and use.
   • Not obstructing escape routes, walkways, and other activities.
   • Protected from rain, sun, and environmental degradation.
6. Only firefighting equipment and tools that meet quality regulations are permitted to be arranged.
7. Fire extinguishers shall be hung on walls, columns, or placed on the floor… If extinguishers are hung on a wall or column, the distance from the floor to the handle of the extinguisher shall not exceed 1.25 m. If placed on the floor, extinguishers must be in a dry place; if on a stand, the height of the stand shall not exceed 2/3 of the extinguisher’s height. If an extinguisher is placed near an exit, it must be hung or placed 1 m from the edge of the door.
8. Within the station, firefighting equipment and tools may be arranged sporadically at each location or, if possible, in clusters depending on the level of fire and explosion risk and the area to be protected. If arranged in clusters, there must be at least 2 clusters.

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VIII. WATER SUPPLY, DRAINAGE, AND ENVIRONMENTAL HYGIENE SYSTEM

1. For on-land gasoline stations
   • Domestic water and firefighting water at the gasoline station shall be sourced from public water supplies, groundwater, or surface water.
   • The domestic water supply pipeline and the firefighting water supply pipeline for the station can be combined.
   • Oil-contaminated wastewater from the station must be collected through a separate drainage trench system with covers made of reinforced concrete grates with ventilation holes or steel bar grates to prevent the accumulation of gasoline vapor. A trap must be installed before connecting the oil-contaminated wastewater drainage system to the common drainage system.
   • Oil-contaminated wastewater from the station must be treated to meet the regulations in QCVN 29:2010/BTNMT National Technical Regulation on the Effluent of Petroleum Depots and Stations before being discharged into the external environment.
   • Oil-contaminated tools and waste must be sorted, stored, collected, transported, and treated in accordance with the provisions of Decree No. 38/2015/ND-CP dated April 24, 2015, of the Government on waste and scrap management; Decree No. 40/2019/ND-CP dated May 13, 2019, amending and supplementing a number of articles of the decrees detailing and guiding the implementation of the Law on Environmental Protection; Circular No. 36/2015/TT-BTNMT dated June 30, 2015, of the Ministry of Natural Resources and Environment on hazardous waste management.
2. For on-water gasoline stations
   • Oil-contaminated wastewater from the station must be collected through a separate drainage trench system with sturdy covers, with ventilation holes or steel bar grates to prevent the accumulation of gasoline vapor.
   • Oil-contaminated wastewater from the station must be treated to meet the regulations in QCVN 29:2010/BTNMT before being discharged into the external environment.
   • When pumping fuel, tools must be available to catch excess gasoline from the nozzle; gasoline must not be allowed to fall into the water. Oil-contaminated tools and waste must be placed in a sealed container and treated in accordance with the provisions of Circular No. 36/2015/TT-BTNMT dated June 30, 2015, of the Ministry of Natural Resources and Environment on hazardous waste management.

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IX. GASOLINE VAPOR RECOVERY SYSTEM IN PETROLEUM INDUSTRY SAFETY DOCUMENTS

1. The diagram and principle of a typical gasoline vapor recovery system are described in Appendix II issued with this Regulation.
2. The vapor recovery system must ensure that all gasoline vapor generated during the receiving process is returned to the tanker truck’s tank.
3. The equipment used in the vapor recovery system must be made of petroleum-resistant and non-combustible materials.
4. General requirements for the vapor recovery system:
   • The breather valve system of the storage tanks must meet the regulations in this Standard.
   • The vapor recovery connection point of the station is installed independently corresponding to the breather valve system of the storage tank.
   • The quick couplings must meet quality and tightness requirements: rubber gaskets must be oil-resistant; the male and female ends of the quick couplings at the gasoline station and on the tanker truck must be compatible.
   • After installation, the system must be tested for tightness and the quality of the breather valve components, shut-off valves, and quick couplings of the entire system must be checked.

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X. DISTANCE OF GASOLINE STATIONS TO OTHER INFRASTRUCTURE

The distance from a gasoline station to other construction works shall comply with QCVN 01:2019/BXD National Technical Regulation on Construction Planning.

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XI. Responsibilities of state management agencies in petroleum industry safety documents

1. The Domestic Market Department – Ministry of Industry and Trade shall lead and coordinate with relevant agencies and units to guide, inspect, and supervise the implementation of this Regulation; It is responsible for proposing to the Minister of Industry and Trade amendments and supplements to this Regulation to suit practical conditions.

2. The Departments of Industry and Trade of provinces and centrally-run cities are responsible for guiding, inspecting, and supervising the implementation of this Technical Regulation in their localities; Receiving reports on regulation conformity from organizations and individuals as prescribed.

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XII. Responsibilities of Business Entities owning gasoline stations

Must ensure that the gasoline station complies with the provisions of this Technical Regulation and report to the Department of Industry and Trade where the gasoline station is located. Subject to inspection and supervision by competent state management agencies as prescribed.

Article 18. Implementation Organization

1. In case the documents referred to in this Regulation are amended, supplemented, or replaced, the provisions of the new document shall apply.
2. This Regulation takes effect from January 01, 2021.
3. This Regulation replaces the national technical regulations:
   • QCVN 01:2013/BCT National technical regulation on requirements for designing petrol stations;
   • QCVN 10:2015/BCT National technical regulation on requirements for designing on-water petrol stations.

4. Organizations and individuals, in the course of implementing this Regulation, if they detect any inconsistencies, are requested to report them to the Ministry of Industry and Trade for consideration, research, and adjustment./.

 

ILLUSTRATION AND CLASSIFICATION OF FLAMMABLE AND EXPLOSIVE HAZARDOUS ZONES AT GASOLINE STATIONS

1. Hazardous zone
   • An area in which flammable substances in the form of gas or vapor are, or may be, present in quantities such as to require special precautions for the construction, installation and use of electrical apparatus. Hazardous zones are classified as follows:
     • Zone 0: an area in which an explosive gas atmosphere is present continuously or for long periods.
     • Zone 1: an area in which an explosive gas atmosphere is likely to occur in normal operation.
     • Zone 2: an area in which an explosive gas atmosphere is not likely to occur in normal operation and, if it does occur, will persist for a short period only.

2. Non-hazardous zone
   • An area in which an explosive gas atmosphere is not expected to be present in quantities such as to require special precautions for the construction, installation and use of electrical apparatus. Areas outside the hazardous zones and not illustrated as in Figure 1 are defined as non-hazardous areas.

3. Hazardous zones at some locations in a gasoline station (dimensions on drawings are in mm)

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XIII: Further Reference

1. Safety training service for group 3 certification

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2. Group 3 labor safety test

• Group 3 labor safety multiple-choice test

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3. Price list for labor safety training services

• View details