1. Types.
The types of container valves specified in accordance with the High Pressure Gas Management Act and Japanese industrial standards are as follows: 1. Compressed gas container valves (except container valves for acetylene gas);2. Compression acetylene container valve;3. Liquefied gas container valve (except 4, 5);4. Liquefied petroleum gas accommodating valve;5. Ultra-low temperature and cryogenic valves.
Second, the material. Generally, according to the type of filling gas, valves of different materials are selected. There are brass, brass nickel-plated, stainless steel, Monel, etc.
3. Valve thread turning.
The container valve is threaded connection, and the gas generally filled is combustible gas, so the outlet thread of the container valve is left-handed, and the other gases are right-handed.
Fourth, the specifications of the container valve.
1. Safety, the container valve must be able to withstand the pressure test above the pressure test of various gases filled with the container it is assembled.
2. Testing, since February 1976, the test items include appearance inspection, tensile test, impact test, chemical composition analysis of materials, pressure test, air tightness test, and performance test.
3. Safety valve, for the container must be equipped with a safety valve (except for hydrogen cyanide and other parts), the safety device of the safety valve has two types: safety plate type and fusible alloy type. Its starting pressure is set below 4 5 of the withstand pressure test pressure of the vessel valve.
4. Regular re-inspection, the container valve exceeds the validity period or is damaged, and it needs to be inspected again according to the regulations.
5. Although the printed content on the container valve is different from the container and there is no certificate, it is stipulated that the same 6 contents can be printed with the container.
5. The use and maintenance of container valves.
1.Check before use: Before opening the container valve, check whether the valve is intact to ensure that there is no leakage and no blockage. At the same time, make sure that the outlet thread of the valve matches the container to which it is connected.
2.Correct use: When opening or closing the valve, a special valve tool should be used, and the operation should be operated according to the arrow indication on the valve. For valves that need to control the flow direction of the gas, make sure that the flow direction indicator arrow is pointing in the correct direction.
3.Maintenance and maintenance: Regularly maintain the container valve to check whether there is wear, leakage and other phenomena. If necessary, the damaged valve should be replaced in time. At the same time, it is necessary to keep the valve clean and prevent debris and dirt from entering the inside of the valve.
4.Storage and transportation: During storage and transportation, container valves should be placed in a dry, well-ventilated place, away from direct sunlight and humid environments. At the same time, it is necessary to ensure that the valve will not be subjected to excessive vibration and collision during transportation.
6. Summary. Vessel valves are an indispensable part of high-pressure gas management, and there are strict regulations on their types, materials, specifications, and maintenance. Only the correct use and maintenance of container valves can ensure the safe use and management of high-pressure gases. During use, regular inspection and maintenance should be carried out to find and solve problems in time to ensure that the container valve is always in good working condition. At the same time, it is necessary to strengthen the training and education of relevant personnel, improve their safety awareness and operational skills, and provide a strong guarantee for the safe and stable operation of high-pressure gas management.