Regarding the allowable deviation for pipe fitting wall thickness
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Hello everyone. When purchasing fittings such as elbows and tees that comply with GB/T 12459, what standard should be used to determine the allowable deviation in wall thickness? General pipeline standards specify allowable deviations for the outer diameter and wall thickness of steel pipes, but after checking many standards, no such specifications for the allowable deviations of pipe fitting wall thickness were found. I hope the experts can offer some guidance; it would be great if relevant standard regulations could be provided. Thank you in advance.
The standard book states 0.875
Hello, may I ask which standard and which clause it is? I’ve been searching for a long time but couldn’t find it
It’s not clear; we need to study it further. Currently, we are verifying that the deviation of the materials is within 5 percent
It’s in GB/T12459. . . I didn’t look at it carefully at all. . GB/T12459-2005 Table 13 GB/T12459-2017 Clause 8.2
Is there a limit on the deviation range?