What grade of pipeline steel was used in China’s early oil and gas pipelines (such as the 83 Pipeline)?

2009-03-15View Original

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Dear HaiChuan alumni, I would like to ask what grade of pipeline steel is currently being used for existing pipelines in China

Reply #22009-03-16

What does domestic A3 steel correspond to in terms of X grades? These days, people talk about X65, X70, X80

Reply #32009-03-16

X65, X70, and X80 are all steel grades specified in API 5L; the corresponding national standard is GB/T 9711-1999, with grades such as L450 and L485. It’s not even known whether the steel used in the old pipes is pipe steel

Reply #42009-03-17

I checked today; for the \"83\" pipeline, 16MnR steel is used, which is submerged arc spiral welded pipe with a wall thickness of 6–11 mm

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What grade of pipeline steel was used in China’s early oil and gas pipelines (such as the 83 Pipeline)?

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