What tests are required after modifying existing pipelines
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It is now necessary to modify some of the pipelines. As these buried pipelines have been in use for many years, they need to be descaled again, coated with anti-corrosion materials, and equipped with leak detection devices. What tests need to be conducted on these pipelines, and is it necessary to have a qualified entity to reinstate them in use? . GC2 tube.
Follow the original pipeline design specifications! It’s not just testing; material selection and construction standards are also followed!
Are there any specifications specifically for the renovation of old pipes?
Non-destructive testing, thickness measurement, pressure testing, spark testing
This post was last edited by touchskyyy on 2019-4-2 at 11:50. If it involves major modifications to processes or pipeline layouts. First, a modification design is carried out (which requires qualified personnel), followed by the modification construction (also requiring qualified personnel). For pressure pipelines, an installation notification is necessary, and a permit for using such pipelines must be obtained from the Quality and Technical Supervision Bureau. Personal opinions are for reference only. For testing, non-destructive testing, strength tests, leak tests, purging, etc. (in accordance with the provisions of the construction acceptance specifications)
Pipelines that have been buried for many years, if they were not properly protected against corrosion in the past, have little value left for reuse. Generally, special attention is paid to corrosion protection for buried pipelines in order to ensure a sufficient service life. Reapplying corrosion protection in such cases is quite difficult, which is why it is rarely done. Since it is a pressure pipeline, it must undergo standardized testing and inspection in accordance with the original design requirements; special inspection qualifications are essential
1. Raw material control； 2. Assembly and welding control ； 3. Corrosion control! There must be supporting documents!