How to determine the location of defects in buried pipelines

If everything is buried underground, things will get complicated. Here’s a solution: 1. Run water for an extended period of time to see if there is any obvious seepage on certain areas of the ground； 2. Conduct sectional inspections: first divide the pipeline into two sections and perform pressure testing on each to determine where there are leaks, and proceed in this manner ； 3. Ask the welders whether the welding quality wasn’t properly controlled at the time of welding; they should have some idea about it.

There are quality defects at the weld seam; could there also be residues on the pipeline?

After reading the LZ’s post, I was really speechless – how can it be allowed to just disappear without any suppression? ! ! ! This is a huge mistake in management! It’s really difficult to check in such a situation; it’s even more troublesome than doing it again. As the guy on the 2nd floor said, there’s no simpler way around it. If straight-seam pipes or threaded pipes are used, it will be a complete disaster! It is recommended to strictly follow the procedures in future work.

Reply to 2# Chemical Engineer: 1. Extend the water supply time to see if there is any obvious seepage on which part of the floor； 2. Conduct sectional inspections: first divide the pipeline into two sections and perform pressure testing on each to determine where there are leaks, and proceed in this manner ； 3. Ask the welders whether the welding quality wasn’t properly controlled at the time of welding; they should have some idea about it. Thanks, bro really has experience. Method 1 was originally good, but unfortunately the rainy season has arrived now; the soil is generally moist, making it difficult to observe any obvious leakage. 2 is rather troublesome; there’s no other choice but to do it that way. Let’s give it a try for now. I agree with what other seniors have said as well; it is indeed a problem with the management program. But there are many frustrating factors here; firstly, the owners’ competence is quite low – they prioritize their own interests above everything else, rushing to get things up and running as quickly as possible, and eager to spend all their money at once. The quality of our contractors isn’t that great either; they’ll do anything to get the money needed for commissioning, leaving behind a bunch of outstanding items. They get 80-90% of the payment once commissioning is complete, and they really don’t care about the remaining balance. Moreover, many of the key managers on site are farmer-entrepreneurs, so they don’t consider the sustainable development of the company. Things like disruptions in the construction process have happened before; it’s just that bad luck led to problems this time. The future of owners, contractors, and workers is uncertain. Everyone’s gone mad; high profits are the only thing that matters now, and all sense of reason is ignored.

Ah, sometimes doing such things has the opposite effect. Before backfilling buried pipes, two things must be done first: first, pressurize the pipes； Second: Spark inspection (this still cannot be skipped; it’s not complicated to carry out). Only after backfilling in this way can one feel at ease. If the welder from that time can be found, it might be easier to locate the site. If nothing else works, resort to manual excavation.