Does anyone know anything about the technology for gas-bearing intersections in natural gas fields?
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When repairing pipelines or joining old and new pipelines, natural gas is often welded at the junction without being replaced, for the sake of speed and convenience. Does anyone know the details of such procedures?
There was a gas collision at the drilled tee; it’s gas. The technical requirements are that the air pressure must be positive; there must be no interruption in the supply of air, and adequate safety measures must be in place.
It is a relatively dangerous operation: 1. Experienced personnel are required; 2. It must be carried out with positive pressure and a flame; 3. Sufficient operating space and ventilation are necessary; 4. The operation must be carried out quickly (preparation in advance)
I guess it’s not done this way these days; no one wants to take on such safety risks. In the past, it was common to carry out repairs by welding things together
The technology for making openings under pressure is already quite mature; the original poster can search online – there’s a very intuitive animation that makes it clear at a glance
I’m aware of this; we have used it on numerous occasions in projects such as chemical plant modifications, long-distance pipelines, and tank farm upgrades. The technology known as \"plant continuous operation sealing fitting\" is highly mature, and contact information can be provided if needed. However, the cost is very high; the cost for one weld joint of DN250 is around 80,000 yuan.