Introduction date 1978-01-01

INTRODUCED BY Decree of the State Committee for Standards of the Council of Ministers of the USSR dated February 12, 1976 N 381

By the Decree of the State Standard of 08.02.83 N 702, the validity period was extended until 01.01.88 *

* The validity period was removed by the Decree of the State Standard of Russia N 1044 of 08/27/92. (IUS N 11, 1992). Note "CODE"

REPUBLICATION (July 1983) with Amendment No. 1 approved in February 1983 (IUS 5-83).

INTRODUCED Amendment No. 2, approved by the Decree of the USSR State Committee for Standards No. 2936 dated 16.08.88, entered into force on 01.01.89 and published in IUS No. 12, 1988

Amendment No. 2 was introduced by the legal bureau "Kodeks" according to the text of IUS No. 12, 1988.

This standard applies to specialized trucks, trailers and semi-trailers-tanks of category U category 1 in accordance with GOST 15150-69 (hereinafter referred to as "tank trucks") and intended for the transportation and distribution of liquefied hydrocarbon gases in accordance with GOST 20448-80 (technical butane , mixtures of propane and technical butane) for pressure up to 1.8 MPa during operation on all roads of the general network USSR in accordance with the "Instruction for ensuring the safety of transportation of dangerous goods by car approved by the Ministry of Internal Affairs of the USSR.

Definitions of terms used in this International Standard are given in the reference annex.

1. TYPES, MAIN PARAMETERS AND DIMENSIONS

1.1. Depending on the transport base, the following types of tank trucks and road trains are installed:

• AC - tank cars;
• ПЦ - tank trailers;
• APC - road trains, consisting of a tank car and a tank trailer;
• PPC - tank semi-trailers;
• APTC - road trains consisting of a tractor vehicle and a tank semi-trailer.

Depending on the purpose, two groups of tank trucks and road trains are installed:

• T - transport, intended for transportation of liquefied gases;
• Z - filling stations designed both for transporting liquefied gases and for using them as tankers.

AT symbol tank trucks and road trains should include: type of tank truck (road train), group, nominal capacity, model number of the transport base (except for road trains), designation of technical conditions.

Examples of symbols:

• tank car with a transport nominal capacity of 8 m3 based on the ZIL-130 car:

Tank truck ATsT-8 - 130 TU…

• tank trailer with a transport nominal capacity of 10 m3 based on the GKB-8350 trailer:

Tank truck PCT-10 - 8350 TU…

• road train transport with a nominal capacity of 20 m3, consisting of a tank car and a tank trailer:

Road train-APCT-20 TU…

• refueling road train with a nominal capacity of 12 m, consisting of a tractor vehicle and a tank semi-trailer:

Road train-APPTsZ-12 TU…

(Changed edition, Rev. N 2).

1.2. Static axial loads, mass and dimensions of tank trucks must comply with regulatory and technical documentation.

(Changed edition, Rev. N 1).

1.3. The norms and methods for calculating tankers must comply with GOST 14249-80, GOST 24755-81 and GOST 25895-83.

The bottoms and shells of the vessel bodies must be made of sheet steel grade 16GS in accordance with GOST 5520-79, which must pass heat treatment, providing at a temperature of minus 40 ° C values ​​of impact strength not lower than 3 kgf m/cm. As materials for welded parts, the following should be used:

• for flanges, hatches and manholes, reinforcing rings and linings of supports - steel 16GS according to GOST 5520-79;
• for couplings, branch pipes, fittings and flanges - steel 09G2S according to GOST 19282-73.

It is allowed to manufacture vessels and welded parts from steels whose physical and chemical characteristics are not lower or exceed the requirements of the above standards.

1.4. The dimensions that determine the location of the king pin on the tank semi-trailer, as well as the contour of the lower front part of the tank semi-trailer, must comply with the requirements of GOST 12105-74.

Coupling eyelets of trailers - in accordance with GOST 2349-75, coupling pins of semi-trailers - in accordance with GOST 12017-81.

(Changed edition, Rev. N 1).

1.5. Nominal capacities and main dimensions of tanker containers should be selected taking into account the carrying capacity of the base vehicle, trailer or semi-trailer and economical cutting of material.

When choosing nominal capacities, one should be guided by the parametric range of the GEE type, version 1 in accordance with GOST 9931-85.

The bottoms of the vessels of tankers must comply with the requirements of GOST 6533-78.

(Changed edition, Rev. N 1, 2).

2. TECHNICAL REQUIREMENTS

2.1. Tank trucks must be manufactured in accordance with the requirements of this standard for specifications for a specific type of tank truck and comply with the current "Rules for the Design and safe operation vessels operating under pressure", approved by the USSR Gosgortekhnadzor.

(Changed edition, Rev. N 1).

2.2. The design of tankers should be calculated:

a) the strength of the vessel from the action of the internal overpressure of propane at the design wall temperature of +50 °C;

b) strength load-bearing structures(vessels of tank trucks of a frameless design, frame, vessel and supports), taking into account the dynamic coefficient = 2.5, which takes into account the impact load perceived by tank trucks when driving on uneven roads;

c) stability cylindrical shape vessel from the joint action of maximum weight bending loads (when filling the vessel with butane with design temperature minus 40 °C) and vacuum;

d) the distribution of the mass of the equipped tank truck and the total mass along the axes of the transport base and sides;

e) longitudinal and transverse stability against overturning.

f) on the fatigue strength of the vessel (calculation of strength under low-cycle loads - according to GOST 25895-83).

(Changed edition, Rev. N 1, 2).

2.3. Transport bases of tank trailers and tank semi-trailers must comply with the requirements of GOST 3163-76, tank cars - with the requirements of GOST 21398-75.

(Changed edition, Rev. N 1).

2.4. The design of transport tankers should provide:

a) filling and draining gas using the means of liquefied gas filling stations (LGS) and cluster bases (CB);

b) gas discharge due to the difference in levels in the drained and filled vessels.

2.5. The design of refueling tankers should provide:

a) filling the tank transported by this vehicle;

b) filling the consumer's tank with his own means both from the tank transported by this vehicle and from another tank.

2.6. Each tank truck must have the following equipment and devices:

a) shut-off valves and plugs on the filling and drain pipelines and the vapor phase pipeline;

b) a pressure gauge with an accuracy class of at least 2.5 with an upper measurement limit of 2.5 MPa (25 kgf/cm) of vibration-resistant design and with a device for connecting a control pressure gauge;

c) safety valves that meet the requirements of the "Rules for the Design and Safe Operation of Pressure Vessels" approved by the USSR Gosgortekhnadzor;

d) liquefied gas level indicator with measurement limits from 10 to 90% of the geometric capacity, with an integer division of 5%. It is forbidden to use glass tubes as a level indicator, as well as the use of level indicators with gas emissions into the atmosphere;

e) valve for maximum filling with a control tube of 85% level;

f) devices that automatically protect the tanker from emergency gas flow through the discharge and filling communications in the event of a rupture of the sleeve (such as a high-speed valve on the drain pipeline and type check valve on the filling pipeline);

g) a mechanism for automatic blocking of the vehicle ignition system in the course of loading and unloading operations for tank trucks of the AC type;

h) at least two suction and delivery hoses 10 m long for tank semi-trailers and at least 6.5 m for tank cars and tank trailers;

i) devices for removing residual gas from the hoses into the system or purge candle;

j) external lighting fixtures according to GOST 8769-75;

k) at least two powder fire extinguishers with a capacity of at least 5 liters each;

m) a grounding cable with a pin-clamp and a chain constantly touching the ground to protect the tanker from static electricity;

m) removable spark arrester;

o) a set of special tools;

n) two signs "Danger" in accordance with GOST 10807-78.

(Changed edition, Rev. N 1, 2).

a) a means or device with a control panel for draining and filling liquefied gas;

b) a filter for cleaning liquefied gas from mechanical impurities in front of the filling and draining facility;

c) a device for measuring the amount of released gas.

(Changed edition, Rev. N 2).

2.8. At the request of the consumer, the following additional equipment must be installed on tankers:

a) automatic filling limiter on the filling pipeline;

b) (Deleted, Rev. N 2).

c) anti-freeze drain valve;

d) a signaling device in the driver's cab indicating the maximum allowable gas pressure in the vessel;

e) means for accelerated discharge of gas on transport tankers;

f) a device that provides the possibility of sampling gas from a vessel of tank trucks of the AC type and supplying it to the power supply system of a vehicle converted to operate on liquefied gas.

(Changed edition, Rev. N 1).

2.9. Each tank truck must be equipped with a towing hook for pulling out, a buffer protruding at least 50 mm beyond the size of the vessel, and a device protecting communications and equipment for securing hoses during the movement of tank trucks, a bracket (or place) for attaching a license plate and information tables of the SIO (hazard information system), storage box for spare parts, special tools and accessories, devices for installing a spare wheel and protecting the fuel tank.

The installation (or application) of SIO tables and the protection of the fuel tank must be carried out in accordance with the requirements of the "Instructions for ensuring the safety of the transportation of dangerous goods by road" according to the technical documentation for a specific type of tanker.

(Changed edition, Rev. N 1, 2).

2.10. The installation of special equipment should not reduce the basic parameters of the passability of base vehicles, trailers and semi-trailers, with the exception of the rear overhang angle, which must be at least 18°.

(Changed edition, Rev. N 1).

2.11. Tanker trucks must be equipped with a muffler exhaust pipe in accordance with the requirements of the "Instructions for Ensuring the Safety of the Transportation of Dangerous Goods by Road".

(Changed edition, Rev. N 2).

2.12. Pneumatic brake drive of tank trucks must comply with the requirements of GOST 4364-81.

(Changed edition, Rev. N 1).

2.13. Bandwidth safety valves calculated as specified in GOST 12.2.085-82.

The number of valves must be at least two. Construction and throughput safety valves must comply with the requirements of the Rules for the Design and Safe Operation of Pressure Vessels.

The valves must be installed in the vapor phase.

(Changed edition, Rev. N 1, 2).

2.14. On the lines leading to the pressure gauge and safety valves, it must be impossible to connect for gas sampling.

2.15. The diameters of the flow sections in front of the pressure gauges should be no more than 3 mm.

(Changed edition, Rev. N 2).

2.16. (Deleted, Rev. N 2).

2.17. The means for draining and filling liquefied gas must be installed with the obligatory presence of a bypass with a valve that ensures the draining and filling both with the help of the means itself and without it.

The rotation drive of the pouring and filling means can be carried out both from the engine of the base chassis, and from an autonomous electric motor with a voltage of 220/380 V in an explosion-proof version.

(Changed edition, Rev. N 1).

2.18. (Excluded, Rev. N 1).

2.19. The connecting devices of the suction and delivery hoses must be made of materials that do not give sparks during impacts, or have coatings from these materials.

The fittings of the sleeves must be interconnected by a soldered metal jumper, which ensures the closure of the electrical circuit to remove static electricity.

Rubber-fabric sleeves (flexible hoses) must comply with the requirements of the "Safety Rules in the Gas Industry" of the USSR Gosgortekhnadzor.

2.20. Connecting devices of sleeves and fittings of loading and unloading communications of tankers must have a M60 x 4 H thread in accordance with GOST 8724-81.

(Changed edition, Rev. N 1, 2).

2.21. Vessels and equipment mounted on the chassis of trailers and semi-trailers must be removable.

2.22. Each vessel of tank trucks must have a round hole with a diameter of 500 mm on the bottom.

2.23. Vessels of tank trucks must be equipped with devices for damping hydraulic shocks. The number and location of devices should ensure the division of the vessel into compartments with a capacity of not more than 4 m3 each and should not interfere with the internal inspection of the vessel. The minimum area of ​​the device must be at least 75% of the cross-sectional area of ​​the vessel.

(Changed edition, Rev. N 1).

2.24. Vessels must be thoroughly cleaned and dried, valves and lids must be tightly closed, plugs must be installed on fittings.

The internal surfaces of the vessels in contact with the gas must ensure the safety operational qualities and purity of the transported gas.

(Changed edition, Rev. N 2).

2.25. Vessels of tank trucks must be of steel, welded construction.

2.26. Seams of welded joints at manual welding must be made in accordance with GOST 5264-80, with automatic and semi-automatic - in accordance with GOST 8713-79, non-standard seams - according to working drawings and specifications.

The class of welded joints of vessel elements is 3 according to GOST 23055-78.

(Changed edition, Rev. N 2).

2.27. The following defects are not allowed in welded joints:

a) cracks of all types and directions located in the weld metal, along the fusion line and in the near-weld zone of the base metal, including microcracks detected during microexamination;

c) undercuts, influxes, burns and unmelted craters;

d) lack of penetration located in the cross section of the welded joint (between individual beads and layers of the weld and between the base metal and the weld metal);

e) pores in the form of a continuous grid;

f) single slag and gas inclusions with a depth of over 10% of the wall thickness and over 3 mm in length;

g) chains of pores and slag inclusions with a total length of defects greater than the wall thickness in the weld area equal to ten times the wall thickness;

h) accumulation of gas pores and slag inclusions in separate sections seam over 5 pcs. per 1 cm of the seam area; the maximum linear size of an individual defect along its greatest extent should not exceed 1.5 mm, and the sum of their linear dimensions should not exceed 3 mm.

(Changed edition, Rev. N 1).

2.28. Outside surface tank trucks should be coated with light gray enamel, coating class V according to GOST 9.032-74, operating conditions group VI according to GOST 9.104-79 or other light gray enamels intended for painting surfaces operated in atmospheric conditions.

It is allowed to manufacture tankers with a protective shadow casing made of fireproof material located above top vessel.

(Changed edition, Rev. N 1, 2).

2.29. Service life of vessels of tankers - 20 years.

(Changed edition, Rev. N 1).

2.30. Resource of tank trucks up to the first overhaul must match the resource of the base chassis.

The established resource, the mean time between failures and the established trouble-free operating time of tankers must be no less than the corresponding indicators of the base chassis.

Specific values ​​of indicators of failure criteria and limit states are established for each specific type of tankers by regulatory and technical documentation.

(Changed edition, Rev. N 1, 2).

3. COMPLETENESS

3.1. The completeness of the tanker is established by the technical specifications for a specific type of tanker.

(Changed edition, Rev. N 2).

3.2. 1 set is attached to the tank truck kit. operational documentation in accordance with GOST 2.601-68 and a pressure vessel passport in the form established by GOST 25773-83.

The composition of the operational documentation set is established in specifications for a specific type of tanker.

(Changed edition, Rev. N 1, 2).

4. ACCEPTANCE RULES

4.1. To verify the compliance of tankers with the requirements of this standard, acceptance and periodic tests should be carried out.

4.2. Acceptance tests should be subjected to each tanker for compliance with the requirements of paragraphs. 2.6-2.9; 2.11; 2.12; 2.14; 2.19; 2.22-2.28; 3.1; 8.1-8.15.

The run tests according to clause 5.12 should be subjected to one tank truck out of a batch of ten pieces, which has passed the acceptance tests.

(Changed edition, Rev. N 1, 2).

4.3. The test results according to paragraphs 2.26 and 2.27 must be entered in the vessel passport. In accordance with the requirements of the Rules for the Design and Safe Operation of Pressure Vessels, a mark must be made in the tanker's passport confirming the acceptance of the tanker by the technical control service.

(Changed edition, Rev. N 1).

4.4. Periodic tests should be subjected once a year to three tankers from among those that have passed acceptance tests for compliance with the requirements of paragraphs. 1.2; 2.4-2.15; 2.17-2.23; 2.26; 2.27.

(Changed edition, Rev. N 2).

4.5. The tank truck assembly during acceptance and periodic tests must be tested for the tightness of communications and devices.

4.6. The results of periodic tests are final.

4.5, 4.6. (Changed edition, Rev. N 1).

5. TEST METHODS

5.1. The determination according to clause 1.2 of the total mass and mass of the equipped tank truck, as well as the distribution of the total mass and mass of the equipped tank truck along the axes and sides, is carried out by weighing on a general-purpose scale according to GOST 14004-68, with a weighing limit of up to 20 tons, division value 10 kg. Before weighing, the completeness and stowage of equipment, the presence of full refueling, the absence of contamination and foreign objects on a tank truck.

The dimensions of the scales must allow the tank truck to be placed on them with all wheels at the same time.

When weighing, the wheels of the tank truck must not be braked, the gear lever must be in neutral position, the engine must be stopped.

(Changed edition, Rev. N 1).

5.2. Check according to paragraph 2.4; 2.5 is produced on liquefied gas according to the program and methodology drawn up by the developer. At the same time, the operability, adjustment and adjustment of all components, assemblies and devices of the tanker should be checked for compliance with their technical characteristics.

(Changed edition, Rev. N 1).

5.3. Check according to paragraphs. 2.6-2.9; 2.11; 2.13; 2.14; 2.17; 2.21; 2.23-2.25; 2.28; 3.1; 6.1; 6.4; 8.1-8.15 and correct assembly are carried out by external inspection.

Inspection should be carried out without removing and disassembling the equipment.

(Changed edition, Rev. N 1, 2).

5.4. Verification according to clause 2.19 is carried out by external inspection. Sleeve dents, sheath wear, cord delamination, breaks in the grounding conductor are not allowed. The integrity of the grounding conductor of the sleeve must be checked control lamp at a voltage of 36 V.

5.5. Checking according to paragraphs 1.4 and 2.22 is carried out by measuring the dimensions with a caliper in accordance with GOST 166-80 and a tape measure in accordance with GOST 7502-80.

5.6. Checking according to clause 2.12 is carried out in accordance with GOST 4364-81.

(Changed edition, Rev. N 2).

5.7. Checking according to clauses 2.15, 2.20 is carried out with ring gauges and plugs PR and NOT of the corresponding tolerance field and diameter.

(Changed edition, Rev. N 2).

5.8. Checking according to clause 1.5 is carried out by measuring the main dimensions of the vessel.

At least three measurements are taken different places. The arithmetic mean value of the dimensions is taken as the actual size.

5.9. Verification according to paragraphs 2.26 and 2.27 is carried out:

a) external inspection of 100% of welded joints in accordance with GOST 3242-79;

b) mechanical testing of samples in accordance with GOST 6996-66;

c) transillumination of 100% of welded joints in accordance with GOST 7512-82 or ultrasonic testing in accordance with GOST 14782-86, or X-ray television method in accordance with the requirements of industry regulatory and technical documentation.

Sensitivity class of radiographic control of welded joints of vessel elements - 1 according to GOST 7512-82.

Sensitivity standards - wire type N 2 and groove type N 1, according to GOST 7512-82.

(Changed edition, Rev. N 2).

5.10. Checking for equipment performance and valve tightness is carried out according to the program and methodology drawn up by the developer and agreed with the customer.

5.11. Checking the tightness of the connection of communications and devices of the tank truck assembly should be carried out with an air pressure of 1.8 MPa or a fluorescent-hydraulic method with a pressure of 2.3 MPa.

Tests by the luminescent-hydraulic method must be carried out in accordance with the normative and technical documentation. The test results must be recorded in the vessel passport.

Pneumatic testing is allowed only under the condition positive results internal inspection and strength test of the vessel hydraulic pressure and compliance with safety precautions: the valve on the filling pipeline from the pressure source and pressure gauges must be outside the room in which the tanker being tested is located, and people are removed to a safe place for the duration of the pneumatic pressure test.

When testing, plugs must be installed on the vessel fittings, stuffing boxes of shut-off and control valves must be tightened.

The pressure in the vessel must increase smoothly, the vessel must remain under the specified pressure for the time necessary to inspect the vessel and check the tightness of its seams and detachable connections soapy water.

Tapping of vessels, elimination of defects and tightening of fasteners in vessels under pressure is not allowed.

After the defects are eliminated, the tests are repeated.

(Changed edition, Rev. N 1)..

5.12. Tankers must be subjected to road tests:

a) during acceptance tests by mileage of equipped tankers on roads at a speed provided for during the running-in of the base vehicle, for a distance of at least 10 km;

b) during periodic mileage tests of tank trucks with a full load of liquefied gas for a distance of at least 100 km, of which 50 km on paved roads and 50 km on dirt roads and rough terrain. Movement must be carried out with high speeds subject to traffic safety, taking into account road conditions.

During the tests, the operability of electrical equipment, pneumatic equipment, the reliability of all locks and latches, the attachment points of the vessel, communications and fittings of instruments and other equipment are checked, and three vigorous braking is performed at a speed of 40 km / h to a complete stop.

(Changed edition, Rev. N 1, 2).).

6. MARKING, PACKAGING, TRANSPORT AND STORAGE

6.1. On the body of the vessel, distinctive stripes and the inscriptions "Propane - flammable" must be applied in accordance with the requirements of the "Rules for the Design and Safe Operation of Pressure Vessels" approved by the USSR Gosgortekhnadzor.

Each tank truck must have information tables of the SIS, made and installed in accordance with the requirements of the Instruction for Ensuring the Safety of the Transportation of Dangerous Goods by Road.

(Changed edition, Rev. N 1, 2).

6.2, 6.3 (Deleted, Rev. N 2).

6.4. Passport data plates must comply with the requirements of GOST 12969-67 and GOST 12971-67, the font of the inscriptions is made using the flat printing method in accordance with GOST 26020-83.

(Changed edition, Rev. N 2).

6.5. Tank trucks, spare parts and tools must be preserved in accordance with GOST 9.014-78, product group - II, storage conditions - strict, conservation period - 3 years.

The inner surface of the vessel and pipelines is not subject to preservation.

(Changed edition, Rev. N 1, 2).

6.6. Spare parts, tools and accessories must be placed in the box of the tanker designed for storing spare parts, tools and accessories.

It is allowed to pack spare parts, tools and accessories separately in wooden boxes according to GOST 16536-84.

The weight of the box with packed products should not exceed 60 kg.

(Changed edition, Rev. N 2).

6.7. Each box must be accompanied by an accompanying document indicating the manufacturer, type of product, number of products packed in boxes, date and period of conservation and packing date.

6.8. Operational documentation must be packed in a case polyethylene film in accordance with GOST 10354-82 and placed in a box of a tank truck for storing spare parts, tools and accessories.

(Changed edition, Rev. N 2).

6.9. Transportation of tank trucks can be carried out on their own, by rail and water transport in accordance with the rules for the carriage of goods in force on this type of transport.

Transportation conditions in terms of the impact of climatic factors - according to storage conditions 8 GOST 15150-69.

6.10. Storage conditions for tankers in terms of the impact of climatic factors - according to storage conditions 5 GOST 15150-69.

It is allowed to store tank trucks in open areas, if this does not contradict the requirements for storing the transport base (car, trailer, semi-trailer).

6.9, 6.10. (Changed edition, Rev. N 1).

7. MANUFACTURER WARRANTY

7.1. The manufacturer must guarantee the compliance of tankers with the requirements of this standard, provided that the consumer observes the operating and storage conditions established by this standard and the operating instructions.

7.2. The warranty period for a tank truck is 3 years and is calculated from the date of its registration with the traffic police of the Ministry of Internal Affairs, but no later than one month from the date of receipt by the consumer.

(Changed edition, Rev. N 1).

7.3. For cars, trailers, semi-trailers and other components guarantee period- according to the normative and technical documentation for these products.

8. SAFETY REQUIREMENTS

8.1. Vessels of tank trucks must be manufactured, tested and equipped with fittings and instruments in accordance with the requirements of the Rules for the Design and Safe Operation of Pressure Vessels and this standard.

8.2. All controls of tank trucks must be accessible for manual control and convenient for operation during operation. All valves should be easily opened and closed (one-handed) by the handwheel, ensuring complete tightness. In this case, the moment applied to them should not exceed 4.9 N m.

(Changed edition, Rev. N 1).
8.3. Controls must exclude the possibility of spontaneous switching on of control under the influence of transport shaking and must have clear explanatory inscriptions.

8.4. Plugs must be installed on the fittings during transportation and storage of gas.

8.5. Shut-off valves must be closed with protective covers, providing the possibility of sealing them for the period of transportation and storage of gas in tankers.

8.6. At least two safety valves must be installed on each vessel to prevent pressure increase in the vessel above the established norm.

8.7. Drain and fill lines must have devices to relieve pressure from the hoses before they are disconnected into the purge plug.

Each vessel must have at least two devices.

(Changed edition, Rev. N 1).

8.8. To prevent spontaneous movement of tankers when parked, the design of tankers should be provided with a parking brake and wheel chocks, as well as fixers for the working position of support devices for tankers of the PPTs and APPTs types.

(Changed edition, Rev. N 1, 2).

8.9. To prevent the front part of tank trucks of the PPTs and APPTs types from falling if the fifth wheel coupling of the tractor fails to operate at the moment of starting the movement, a safety chain or cable must be installed on the front support of the tankers of the PPTs and APPTs types.

After checking the operation of the fifth wheel coupling, the safety chain or cable is removed.

(Changed edition, Rev. N 2).

8.10. To ensure electrical safety during operation, all tank truck equipment must be grounded.

The fittings of rubber-fabric sleeves must be interconnected by a soldered metal jumper, which ensures the electrical circuit is closed.

Each tank truck must have an electrically conductive grounding chain connected to the vessel with a length that, when the tank truck is unloaded, makes contact with the ground of at least 200 mm, and a ground cable with a pin-clamp at the end for penetration into the ground or connection to the ground loop.

(Changed edition, Rev. N 1).

8.11. The electrical equipment of tankers must comply with the "Electrical Installation Rules" (PUE) and Sec. 4 Instructions for ensuring the safety of the transport of dangerous goods by road.

(Changed edition, Rev. N 1, 2).

8.12. Fire extinguishers must be installed: one on the chassis (in the cab in close proximity to the driver and in an easily accessible place for him), the second - on the tank (in the front end or on its left side, mounting height - no more than 1.8 m). Fire extinguishers located outside the cabin must be protected from the effects of precipitation and dirt. The design of the bracket must ensure reliable fastening of fire extinguishers and fast withdrawal them if necessary.

(Changed edition, Rev. N 2).

8.13. (Deleted, Rev. N 2).

8.14. The distinctive color of the fittings is according to the "Rules for the Design and Safe Operation of Pressure Vessels" approved by the USSR Gosgortekhnadzor.

8.15. On both sides of the vessel from the seam of the front bottom to the seam of the back bottom, distinctive red stripes 200 mm wide down from the longitudinal axis of the vessel must be applied.

Above the distinctive stripes must be inscribed in black "Propane - flammable".

The inscription "Flammable" shall be applied on the back bottom of the vessel.

8.16. The maximum filling rate with gas is 85% of the geometric capacity of the vessel.

(Changed edition, Rev. N 1).

8.17. It is not allowed to operate the tanker when:

a) expiration of the terms of the next technical examination of the vessel and the car, trailer or semi-trailer;

b) damage and malfunction of the vessel, fittings, grounding and running gear of the tank truck;

c) the absence of a passport, established stamps, inscriptions, necessary fittings, fire extinguishers and residual overpressure of at least 0.05 MPa;

d) the absence of distinctive coloring of the tanker and the contaminated surface of the vessel.

(Changed edition, Rev. N 1, 2).

8.18. When performing any work, it is necessary to ground the tank truck.

8.19. It is forbidden to heat shut-off valves with fire, smoking or lighting matches near the tank truck. Heating should be done with hot air, steam or water.

(Changed edition, Rev. N 2).

8.20. Before inspecting, repairing or cleaning the vessel, measures must be taken to remove residual gas and its vapors, as provided for in the operating instructions and the "Safety Rules in the Gas Industry" of the USSR Gosgortekhnadzor.

8.21. (Excluded, Rev. N 1).

Since liquefied petroleum gas is classified as dangerous goods, specialized transport units are used for its transportation. Automotive gas carrier consists of a vehicle chassis (KamAZ, MAZ) and gas system(tanks, valves, pumps, measuring instruments, safety devices, etc.).

Tank trucks for transporting LPG: technical requirements

An automobile tank designed for the transportation of liquefied gases is a cylindrical steel tank. To protect the container from impact sun rays can be completed with a shadow casing made of of stainless steel. The working pressure at which the cargo is transported is 16 atmospheres. Working temperature must be between -40°C and +50°C.

LPG carrier based on Kamaz

Tanks for gas carriers are manufactured in accordance with GOST 21561-76, which provides for the following requirements:

• Compliance with the Rules for the Design and Operation of Pressure Vessels.
• The ability to withstand the internal load created by propane at a wall temperature of +50°C.
• The strength of load-bearing structures, taking into account the dynamic coefficient equal to 2.5.
• The resistance of the cylindrical shape to the action of weight loads and vacuum.
• Transverse and longitudinal stability against overturning.

Modern requirements for the chassis on which tanks are installed require the mandatory presence of ABS. In addition, each car must have such technical capabilities, as a GLONASS/GPS monitoring system.

Locking and regulating mechanisms

To fill the tank of the autogas carrier and drain the LPG into the gas tank, a drain unit is provided, consisting of several ball valves with a flange connection (see figure). The KSh4 valve is designed to work with the vapor phase, and the KSh1, KSh3, KSh7 valves are for filling/draining the liquid phase. It should be noted that gas is drained using these mechanisms only for filling industrial tanks. To refuel gas tanks located in private households, a drum with a filling sleeve is used, the length of which reaches 50 m.

The drain assembly is required to fill the tank and drain the LPG

Pump equipment

The liquefied gas transfer pump must comply with safety standards when working in an explosive environment. In particular, pump unit Corken Z2000, which is often installed on domestic autogas carriers, is manufactured in strict compliance with Russian and European rules and regulations. The complete unit is mounted on a common frame and consists of a vane pump with a cardan shaft drive of the engine power take-off.

Specifications Z2000:

• Max. rotation speed: 750 rpm;
• Max. temperature: 107°C;
• Max. working pressure: 28.6 atm.;
• productivity: 270 l/min;

Pump unit Corken Z2000

Instruments for measurement and control

Not a single gas carrier can operate without instrumentation. Such devices must undergo regular metrological checks, since they are responsible not only for the correct filling of the container, but also for the safety of working with a propane-butane mixture. By the way, you can read about the features of LPG operation in the article: propane butane for a gas tank - properties and application features.

The following devices are installed on tankers for the transportation of liquefied gases:

• pressure gauge for measuring pressure after the pump;
• pressure gauge for measuring pressure in the tank;
• electronic level gauge showing the percentage filling of the tank;
• drain meter with vapor phase cut-off valve.

For safe work gas carrier is equipped with instrumentation

By monitoring the indicators of the devices, the operator controls the process of filling / draining, preventing dangerous situations. The critical indicator of pressure gauges is considered to be 16 atmospheres, as evidenced by the red mark. It is also important to monitor the filling level of the tank, which should not exceed 85%.

The meter allows you to control the amount of drained gas both to the driver-operator of the gas carrier and to the buyer. It is important that after the counter there is no additional taps. Its outlet should only be connected to a drain hose.

The counter for control of the merged gas

Equipment protection means

To protect equipment from emergencies safety elements are included. One such mechanism is the differential bypass valve. It is designed to release excess gas back into the tank when the pressure in the pump supply line is exceeded and serves to protect and maintain a long service life of the pump.

A bypass valve is installed to relieve excess pressure

An important point is the filtration of LPG, since it can contain various suspended particles, such as scale. To prevent breakage pumping equipment and provide the end user with a clean product, a filter is installed at the pump inlet.

Such a filter is installed in a gas carrier for cleaning LPG

In the event of a breakdown of the electronic level gauge, a special crane is used to determine the filling level of the tanker. The tube from the locking mechanism is located exactly at the level of 85% filling of the tank. If the vapor phase is released when the tap is opened, it means that the container is not yet filled enough, if the liquid phase - the filling level has reached the limit or exceeded it.

Such an electronic level gauge is used in gas carriers

How to operate a gas carrier: basic safety rules

Before leaving, the driver of the gas carrier must check the technical condition and make sure that all equipment is in good condition. Make sure you have a fire extinguisher and a device to remove static electricity (usually a bronze spike located next to the drain pipe).

On the left in the photo is a bronze pin that serves as a device for removing static electricity.

It is forbidden to place a tanker truck filled with gas near places with open fire and in places of large crowds of people. All manipulations with gas valves must be done carefully, avoiding actions that can lead to the formation of a spark. It is forbidden to use a tool that promotes sparking.

Periodic leak test

An important aspect of the safe operation of a gas carrier is the tightness of all connections. To avoid emergencies, it is necessary to carry out periodic check for a gas leak. To do this, each connection is wrapped with a film material, after which nitrogen is pumped into the system. A small hole is made in the film, which is lubricated with soapy water. In this way, a leak can be detected and promptly repaired.

Using a film smeared with soapy water, a gas leak is checked

Gas delivery is best trusted by a trusted supplier. The Promtekhgaz company has at its disposal new 12 m³ tank trucks based on KamAZ vehicles, which are equipped with a GLONASS/GPS monitoring system. Thanks to the new fleet, the buyer receives gas products in the shortest possible time.

Incidentally, more detailed information you will find about autonomous gasification.