In chemical plants, under what circumstances are seamless steel pipes required for pipelines?
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Most of the pipes in chemical plants are made of seamless steel tubes. When I visited a company today, I found that the pipes used to transport flammable and explosive fluids there might not actually be made of seamless steel tubes; I lack knowledge in this area. I’m seeking advice from experts: under what circumstances do chemical plants need seamless steel pipes, and is there a simple way to determine whether a pipe is seamless?
Please refer to the selection principles for seamless pipes and welded pipes. For details, please refer to GB/T20801
The codes for town gas design state that GB/T3091 can be used for gas pipelines; furthermore, the diameter of seamless steel pipes available in China goes up to only DN600
Thank you. In our chemical plant, for pipelines carrying flammable and explosive liquids at pressures below 60, seamless steel pipes are used, right?
Three grams of oil. If a company uses seamless steel pipes instead of those designed for transporting flammable liquids, which standard should I refer to when raising objections against them? Dear
This post was last edited by feng elegant on 2017-8-16 at 13:47. According to the pipeline classification standards outlined in the Regulations, pipelines that transport flammable and explosive materials and have a pressure greater than 4.0 MPa are classified as GC1 grade pipelines. According to the provisions of TSG D0001-2009 \"Regulations on Safety Supervision of Pressure Piping – Industrial Piping\" and GB20801, seamless steel pipes shall not be used in GC1-class pipelines. If it does not belong to GC1 grade pipes, welded pipes can still be used.