Fire prevention for transportation of the hottest

2022-08-17
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Transportation of inflammable and explosive chemicals fire prevention

there are five modes of transportation of inflammable and explosive chemicals: highway, railway, waterway, civil aviation and pipeline

section I main causes of fire in the transportation of flammable and explosive chemicals

first, loading and unloading violate the operating procedures or the packaging is unqualified

II. Poor technical conditions of vehicles

III. shunting operation is illegal

IV. driving against rules

v. the assembly isolation does not meet the requirements

VI. wrong fire extinguishing method

section II fire prevention technical conditions of means of transport of inflammable and explosive chemicals

I. fire prevention conditions of road transport means

the means of road transport of inflammable and explosive chemicals are mainly cars. Cars can be divided into ordinary trucks and special vehicles. Special purpose vehicles mainly include tank cars, tank cars, refrigerated cars, container cars and long-distance less than carload transport vehicles. Generally speaking, tractors do not have a better marketing atmosphere for the transportation of dangerous goods in the future, but for less dangerous goods, they are allowed to be used when the road is flat, the road is short, and the transportation volume is small. No matter what means of transportation is used, it must meet the technical conditions and requirements for the transportation of flammable and explosive chemicals, otherwise it cannot be transported

1. Ordinary truck

when transporting inflammable and explosive chemicals, the mechanical parts of ordinary truck must be in good technical condition, especially the braking, direction control and direction indication parts must be absolutely good. When transporting inflammables and explosives, it is not allowed to use trailers. The loaded carriage should not have exposed nails and other objects that are easy to hit sparks. The exhaust pipe of the engine should be equipped with a spark extinguisher to prevent fire caused by fire

the simple spark arrester for oil tanker carrying flammable liquid is generally installed on the exhaust pipe led from the engine to the front of the vehicle to further reduce the chance of oil vapor contacting with Mars

after a certain period of service, the Mars extinguisher should be repaired and maintained, especially the wires in the Mars extinguisher are easy to be damaged and corroded, so they should be repaired and replaced in time to keep them in good condition

in addition, the vehicle should also be equipped with necessary fire-fighting equipment. The type of fire extinguishers should be determined according to the nature of flammable and explosive chemicals transported. Generally, dry powder fire extinguishers should be used, and many suno energy conservation have achieved significant technical advantages over its peers

2. LPG tanker

LPG tanker can be divided into transportation tanker and distribution tanker according to different purposes. The transport tank car mainly transports liquefied petroleum gas to each storage and distribution station. Generally, there is no unloading pump on the car, but it can also directly supply liquefied petroleum gas to large users with their own unloading pump, so as to reduce the reshipment work; The distribution tank car is equipped with a unloading pump, which has a small tank capacity, and is suitable for users who directly supply individual storage tanks or steel cylinders

since the tank on the LPG tank car belongs to the pressure vessel, it must meet the relevant requirements of the pressure vessel and the requirements of the "Regulations on the safety management of LPG tank cars" issued by the Ministry of labor and personnel. In addition to the pressure under the maximum working temperature, the design pressure of the tank body of the tank car should also consider the maximum loading and unloading pressure

safety devices such as safety valve and overflow valve shall be set on the tank body of the tank car. The safety valve shall be built-in full open type, and the installation height exposed to the outside of the tank shall not exceed 150 mm, and shall be protected

some tank cars are also equipped with wave barriers on the tank body to reduce the static electricity generated by liquid vibration during vehicle transportation. When the tank car is equipped with a liquid unloading pump, the pump shaft is connected with the main shaft of the vehicle engine through the transmission mechanism, and the pump is driven by the vehicle engine. There are pressure gauges, thermometers, liquid and gas phase pipes and their valves in the valve box. Emergency shut-off valve shall be installed at the outlet of liquid phase pipe and gas phase pipe

in order to prevent collision, a buffer device (rear bumper) that is not connected with the storage tank should be installed on the frame at the rear of the tank car. The horizontal distance extending out of the rear end of the tank should not be less than 100 mm. The width of the rear bumper can be slightly less than the width of the whole car, but not less than the outer diameter of the tank. The upper end of the grounding chain for anti-static of the tank car is connected with the storage tank and pipeline, and the lower end is free to sag and contact the ground. Explosion proof electrical devices shall be used on the truck, and at least two dry powder fire extinguishers of 5kg or more or 1211 fire extinguishers of 4kg or more shall be equipped

the surface of LPG truck tank car should be painted silver gray. Paint a red ribbon with a width of not less than 150 mm around the horizontal center line of the tank. The central part on both sides of the tank (where the ribbon is left blank and not painted) shall be sprayed with the words "no fireworks" in red, with a word height of not more than 200 mm. The paint color of other exposed parts of the tank car should be: safety valve - red; Gas phase tube - red; Valve silver gray; Liquid phase tube silver gray; Others are not limited

various safety devices and accessories on the tank car, including full lift built-in spring safety valve, pressure gauge, liquid level gauge, temperature to reduce danger gauge, overflow valve, emergency shut-off valve, pipe joint, liquid pump, manhole, duct pipe, various valves, grounding chain and fire extinguisher, must be checked frequently to see whether their performance is normal, whether there is leakage or damage, etc. The pressure gauge shall be calibrated at least once every six months, and the oil resistant rubber hose for loading and unloading shall be subject to air pressure test at least once every six months. The test pressure shall not be less than 1.5 times the design pressure of the tank

regular inspection of tank cars, including inspection and maintenance of tank bodies and various accessories. The chassis and traveling parts of the tank car shall be implemented in accordance with the relevant regulations of the highway transportation department. The annual periodic inspection shall be carried out once a year, and the comprehensive periodic inspection shall be carried out once every five years. If serious defects are found in the annual inspection, the comprehensive inspection shall be carried out in advance

3. Automobile oil tanker

automobile oil tanker is a special tool for road transportation of bulk oil products, which is mostly used for transportation of small oil products or areas without trains. The structure of the tank car is relatively simple, and the tank body is made of 3mm thick steel plate. The oil measuring port is installed at the front end of the tank, and a guide tube is directly connected to the bottom of the tank; The manhole is set in the middle of the tank, and the tank bottom is equipped with a drain valve, an oil drain valve and a ladder. Modern tank cars often have a set of safety equipment for heat insulation, heating and protection with inert gas. In order to ensure fire safety, the oil tank truck should meet the following technical conditions:

1. The tank body should be equipped with a wave plate to reduce the shock of oil when driving. The anti wave plate shall be provided with holes and galvanized. The number of anti wave plates shall not be less than two. The tank shall be divided into three compartments that can be connected to eliminate the accumulation of static electricity in the tank

2. The upper part of the tank should be equipped with a safety valve to prevent the tank from cracking due to increased pressure caused by exposure to the sun

3. In order to prevent the price of electrostatic accumulation from rising again, the car should be equipped with a wire post of electrostatic grounding wire to conduct and remove static electricity

4. in order to ensure the emergency use in case of fire, a certain number of dry powder fire extinguishers must be equipped on the oil tank, and not less than two

5. When the flash point of the oil carried is particularly low, inert gas protection should be added

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