The issue of selecting these materials

2010-05-15View Original

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I saw on a pipe that the pipe material is specified as L245 welded steel pipe, while the fittings are specified as grade 20. Is this acceptable? Thank you!

Reply #22010-05-16

L245 is a type of low-pressure fluid-coiled tube, whose performance is similar to that of seamless tube grade 20； Using pipe fitting No. 20 is appropriate

Reply #32010-05-16

Refer to GB/T9711.1-1997 \"Petroleum and natural gas industry – Technical conditions for the delivery of steel pipes for transportation – Part 1: Steel pipes of grade A\", where the steel grade is L245, indicating that the specified total elongation stress Rt0.5 (min) is 245 MPa.

Reply #42010-05-16

The material grade of ordinary pipe fittings should not be lower than that of the pipes; of course, it can be higher than that of the pipes

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The issue of selecting these materials

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