Discussion on oxygen pipeline installation
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Discussion on key points for oxygen pipeline installation: 1. Qualification inspection of stainless steel pipelines (inspection of certificates and documentation)； 2. Pipe degreasing treatment ； 3. Pipe installation (welding process: TIG welding) ； 4. Pipeline nitrogen filling for leak detection (mainly at welds, valves, and pipe fitting connections) ； 5. Pipeline flaw detection (20% flaw detection for pipelines, 1000% flaw detection for welds). 6. Inspection of valve flange jumpers (ground resistance less than 4 ohms, jumper resistance less than 3 ohms) ； 7. After all requirements are met, oxygen is used to displace nitrogen and then it is put into use. I hope the experts can offer some guidance!
Inspection by flaw detection is sufficient; leak testing can give false results, and gas leak testing is also dangerous
Oxygen pipelines require special types that have specific requirements regarding the smoothness of their inner walls; ordinary pipelines cannot be used. Argon arc welding as a backing process and degreasing before welding are crucial.
Our company has just put oxygen pipelines into use, and I think there are a few additional points to consider. Do you think they are appropriate? 1. After degreasing the pipelines, it is necessary to think about the issue of purging – removing any remaining substances from the pipes. This is especially important when the pipes are long; in such cases, a large volume of purge gas is required. The design for liquid drainage and venting on the pipes must be thorough, with no gaps left unaddressed. 2. Anti-static grounding of pipelines. 3. It is best not to have too many pipes around the pipeline, especially no cable trays. In the event of a fire, prevent it from spreading. 4. When installing pipes in the air, consideration must be given to the line of sight for ground personnel conducting inspections. 5. For nitrogen filling, it is best to have a fixed nitrogen filling port, with valves, bolts, and gaskets all following the standards for oxygen pipelines.