Basement supervisor with gas welding
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The supervisor in the basement has sand holes and leaks. Our company uses low-voltage 220V DC ordinary 3.2 welding rods for welding. I don’t know if it is right. Can an expert give guidance? What should I pay attention to when welding?
It is best to weld after purging, or bond with glue. If welding is necessary, adequate preparations should be made, such as basement combustible gas analysis, gas oxygen content analysis, accident emergency measures, gas pressure reduction, etc.
My brother, you are really brave. Since there are blisters, if it is at the top, it must be leaking gas. You are not afraid of starting a fire and causing the pipe to burn. If it is at the bottom, it should be leaking. Can you perform welding? So it is best to use sealing, or use adhesive to temporarily plug the leak, and wait until there is a chance to stop the construction.
You can try this, first use glue to plug the blisters. If the blisters are relatively large, you can jam a wooden plug and then use glue. In short, there must be basically no air leakage... After you have done it, you can check it with a CO alarm... Finally, turn off the main valve to reduce the pressure. Come...it's like 500~600, prepare fire extinguishers and other fire-fighting equipment...and you can start...but the welding repair master must be highly skilled...and also have a certain psychological quality and the ability to deal with unexpected problems...haha...
Coke oven basement The coke oven basement is a place where gas pipelines are concentrated. It is very easy to cause gas poisoning, fire and explosion accidents caused by various reasons. Fire adjusters have a lot of work to complete in the basement and must abide by the following regulations.: ①Smoking, bringing fire, and wearing spiked leather shoes are strictly prohibited in the basement. ； ②When using fire, you must strictly follow the fire work procedures and apply for a fire permit, and take effective preventive measures (such as preparing yellow mud, sand, asbestos cloth, fire extinguishers, etc.) ； ③Use explosion-proof electrical appliances in the basement and corridor areas. Use non-flammable tools (such as copper tools) ； ④Regularly check the operation of each equipment ； ⑤Wear labor protection equipment ； ⑥You must carry a CO alarm device when entering this area.
Welding is possible, but safety measures must be taken. 1. The oxygen content in the gas main pipe is not more than 1% ； 2. The wall thickness of the pipe at the leakage point reaches more than 6 mm ； 3. The gas in the main pipe must be maintained at positive pressure. ； 4. Fire parts must be reliably grounded, and the grounding resistance should not be greater than 10 ohms. ； 5. The surrounding flammable items must be cleaned up ； 6. Operators should wear gas masks ； 7. The welder master must have good skills.
We have done welding repairs: 1. The gas pipeline must be thoroughly cleaned. 2. Block the blisters with high-temperature adhesive. 3. Weld a small steel plate around the blisters. 4. Strict protective measures, CO monitoring, explosion-proof measures, etc.