Talk about the safety protection for gas cylinders

Thread Content

Overfilling of gas cylinders is strictly prohibited. When a cylinder is overfilled, the increase in temperature leads to expansion pressure of the liquid within the container; this expansion pressure increases at an astonishing rate as temperature rises. For example, if the temperature rises by 5°C, the expansion pressure increases by about 135 Fgf/cm2 (without taking into account the deformation of the cylinder). Such pressure exceeds what the container can withstand, leading to rupture. Therefore, overfilling is strictly forbidden. 　　The dumping of residual liquids is strictly prohibited. Although residual liquids C5-C6 are more difficult to vaporize for use in combustion processes compared to C3 and C4, they are still highly volatile, flammable, and explosive – even more so than gasoline. Their vapors are also denser than air and capable of spreading. If residual liquids are dumped carelessly, the vaporized gases or the liquid itself, as they diffuse and flow, can ignite in the presence of various sources of open flame, leading to combustion and explosion accidents. When there is residual liquid left in the cylinder, air can easily enter it and mix with the combustible gases still present inside, forming an explosive mixture. If sparks generated by static electricity or those produced naturally by sulfides occur, the cylinder can experience a chemical explosion that causes severe damage. Additionally, since air cannot be liquefied when it enters the cylinder, this makes subsequent filling difficult. The residual liquid also pollutes the environment; therefore, it is strictly prohibited to pour out the residual liquid from the cylinder. 　　It is strictly prohibited to transfer gas from one cylinder to another. Transferring gas means that users privately pour liquefied petroleum gas from one cylinder into another at home. Because when shutting down, liquid is delivered directly through rubber hoses, the shutdown system is subjected to high pressure, making it highly likely to rupture. During the aging process, it is difficult to ensure that all connection points are airtight. Environmental conditions will certainly not meet safety requirements. In the event of a leak, the spilled liquid vaporizes and spreads at a rate 250 times its original volume; it will catch fire upon contact with sources of heat such as stoves, smoking, or electrical switches, leading to explosions. This not only endangers the person who caused the leak but also poses a threat to the residents in the surrounding area. Therefore, it is strictly prohibited to allow gas cylinders to run out of gas. 　　The sealing ring of the gas cylinder pressure regulator must be in good condition and capable of providing a seal. 　　If the sealing ring comes off or is damaged, it must be replaced with a new one. To prevent air leakage at the connection between the pressure regulator and the angle valve on the gas cylinder, the pressure regulator must be tightened. If the handwheel on the seal ring is not tightened, the pressure relief valve becomes loose; even if the seal ring is intact, air leakage occurs at the connection between the pressure relief valve and the angle valve port of the cylinder, leading to an accident.