Can’t socket welding be used for ammonia-containing pipelines?
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Some people say that ammonia-containing pipelines cannot be welded using socket welding; I’m not sure if there are any regulations specifying this. Everyone, please help take a look.
Is there crevice corrosion? Is it GC1?
Generally, pipes for transporting chemical media that use socket welding have a diameter of no more than 1.5 inches; for larger diameters, butt welding is used. Pipes with a diameter of no more than 1.5 inches are no longer considered pressure pipes.
Can’t the pipes of GC1 be welded by socket joint?
c) Socket welding shall not be used in the following situations: 1) Situations where crevice corrosion or severe erosion may occur； 2) Cases where a smooth transition at the welding area and the inner wall of the pipeline is required ； 3) In cases of severe cyclic loading or for GC1-class pipelines, where the nominal diameter of the socket weld joint is greater than DN50.
It’s required by these specifications; could you provide the specification number? And is it a **mandatory standard?