Present situation and management of fire extinguishing agent filling system for gas fire extinguishing system in China
Abstract: the types of gas fire extinguishing agents currently used in China and the reasons for the explosion of gas cylinders in the application of gas fire extinguishing systems are briefly described. The current situation of gas fire extinguishing charging in gas fire extinguishing system in China, the existing problems of gas fire extinguishing charging and charging are introduced, and some suggestions are put forward for the filling of fire extinguishing agent in the standard gas extinguishing system, and the expectation for the management of the filling of the fire extinguishing agent is put forward.
Gas fire extinguishing system is one of the four traditional fire extinguishing systems in China (sprinkler system, foam extinguishing system, dry powder extinguishing system and gas fire extinguishing system). Because the gas extinguishing agent has no electricity, no corrosion and no residue after release, it will not cause two pollution disasters to the environment and so on. It is widely used in our country. At present, there are 9 kinds of gas fire extinguishing agents in China, including seven fluoropropane, carbon dioxide, six fluoropropane, three fluoro methane, three fluoro methyl bromide, IG-01 (argon), IG-100 (nitrogen), IG-55 (argon, nitrogen), and IG-541 (argon, nitrogen, carbon dioxide). Among them, 70% fluorine propane, carbon dioxide and IG-541 extinguishing agent are more commonly used. With the popularization and application of gas fire extinguishing system and the increasing market demand, the gas fire extinguishing system has increased to more than 200 units. However, there are many problems in the production, use, maintenance and management of the gas fire extinguishing system, especially in recent years, many gas fire accidents in the gas fire extinguishing system, which have appeared in the engineering application, have raised questions about the safety of the gas fire extinguishing system. The cause of the explosion accident of the cylinder is not only related to the material of the container, the thickness of the wall and the unreasonable processing technology of the inner wall, but the other is related to the filling process of the gas extinguishing agent.
Current situation of filling out extinguishing agent in 1. gas fire extinguishing system
At present, there are more than 200 production units in the gas fire extinguishing system in our country. According to the survey, nearly 90% of the fire extinguishing system of seven fluoropropane, six fluoropropane, three fluoro methane and three fluoro one brominated methane fire extinguishing system is filled by the production unit itself. Less than 10% of the qualified gas filling units are filled and nearly 80% inert gas is extinguishing. Fire extinguishing agent is filled in the filling unit without the filling qualification of the gas extinguishing agent. Less than 20% of the qualified gas extinguishing agent filling unit is filled.
The gas extinguishing agent in China is a product of compulsory certification. However, there are still some gas extinguishing agents that are not compulsory certification for the gas fire extinguishing system by the production units of the fire extinguishing system and the filling units, especially the IG 541 extinguishing agent of the fire extinguishing system of the IG541 fire extinguishing system, which has occurred many times, is the most popular. All over. There are no relevant standards and regulations concerning the filling of gas extinguishing agents in China. The new edition of TSGR00n6 - 2014 "Safety Technical Supervision Regulations for gas cylinders" clearly stipulates "the material, design and manufacture of fire extinguisher gas cylinders in accordance with this regulation", but it does not specify the requirements for the filling of the gas. It is suitable for fire-fighting gas cylinders. The current national standard GB14194 - 2006 "permanent gas cylinder filling regulations" and (jBl4193 - 2009 "filling regulations for liquefied gas cylinders" are also mainly stipulated for the gas filling of general purpose, and no explicit requirements for the filling of gas extinguishing agents are given. In order to meet the quality requirements of the gas extinguishing system and the demand for the filling market, several large domestic two industry gas filling units refer to the national standard GB14194-2006 "permanent gas cylinder filling regulations" and GB14193-2009 "filling regulations for liquefied gas cylinders", as well as gas fire extinguishing system and gas fire extinguishing agent product standard. According to the requirements, the charging standard for the fire extinguishing agent in the gas fire extinguishing system in the enterprise or the local area is set up, and the gas extinguishing agent filling license issued by the local quality and technical supervision department has been obtained. However, there are still a considerable number of the filling units of the fire extinguishing system not only refusing to fill in the national standard, but also not to be filled in according to the relevant technical parameters of the standard of the gas fire extinguishing system, and do not control the filling of the gas extinguishing agent for the compulsory certification, even to reduce the doping of the cost. Low price other gas fire extinguishing agents can not guarantee the safety and fire extinguishing performance of gas fire extinguishing systems.
Problems existing in the filling of fire extinguishing agent in 2. gas fire extinguishing system
The author visited some production units of gas fire extinguishing systems and gas extinguishing agent filling units, and found that most of the gas extinguishing agent filling process in China has many problems.
(1) before the filling of the fire extinguisher, the cylinders were not routinely inspected and inspected. Cylinders are containers filled with high pressure gas. Due to the manufacturing quality, usage environment and usage mode, the safety performance of cylinders is likely to decrease after use. Therefore, it is clearly required in the regulations and standards of TSGRO006-2014 "monitoring regulations on safety technology of gas cylinders", GB14194-2006 "permanent gas cylinder filling regulations" and GB14193 - 2009 "filling regulations for liquefied gas cylinders", which must be checked and tested before the gas cylinder is inflated. In order to ensure the safe use of the cylinder, the unit production, the unsupervised inspection mark, the bottle mouth screw thread is complete, the cylinder is in the prescribed periodic inspection cycle, and the safety accessories of the gas cylinder are complete. But some gas extinguishing agent filling units have not checked and inspected the gas cylinder above, but directly carry out the filling of the gas extinguishing agent. This also increases the safety hazard of the fire extinguishing system.
(2) no compatibility of cylinder material, permanent mark of filling medium on cylinder and nominal work of cylinder.