Issues regarding the supervision and inspection of pressure pipeline installation
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1. Our company has purchased a batch of DN300 stainless steel pipes (seam-welded pipes) for pipeline installation, and the special inspection agency is required to carry out supervision； 2. The steel pipe manufacturer explained that the welding process it uses is plasma + TIG welding. This process does not require special inspections for batch-by-batch testing; an annual inspection is sufficient ； 3. The inspection report provided by the manufacturer is the annual inspection report for DN25 pipes. Questions: 1. Is the welding process of plasma + TIG welding subject to annual inspection? 2. For this process, are all specifications inspected, or is only a certain specification selected for inspection?
This post was last edited by niat8888 on 2017-4-18 08:07. This explanation does not address the right issue. The supervision inspection for pressure pipeline components specified in TSG D7001-2013 is temporarily suspended. . Therefore, there is no mandatory inspection; if the client wishes for an inspection, it is part of the terms agreed upon in the contract. . If the contract stipulates supervision and inspection, then according to TSG D7001, the types of steel pipes manufactured by PAW+GTAW methods that are covered under TSG D7001 are not subject to such batch-by-batch supervision and inspection. Even if inspection is required, it is an annual supervision inspection. There are also regulations regarding annual inspections. . You can’t just pick any specification you like.
Personally, I think an annual random inspection report for DN300 stainless steel welded pipes should be issued. Additionally, I would like to ask whether, for pipeline construction, it is necessary to provide a supervision report from the manufacturing period for special inspections?
First of all, these rules are suspended from being implemented. . . So, in your personal opinion, that view is not valid; since statutory supervision and inspection do not cover it, only contractual obligations remain. . If not, you’re asking me to do it and pay for it now. . . It also depends on whether the special inspection agency you hire is willing to issue a report.
From another perspective, the factory has been inspected by a specialized inspection agency, and the quality certificate issued upon shipment is accompanied by the corresponding documentation to support traceability. There’s no need to worry about it!
You are confusing the supervision of the pressure pipeline manufacturing process with that of the installation process.
I’ve learned it; referring to the answer above, it’s very useful information