out of straightness tolerance for B31.3 piping

[biju]

Hi,

We received some stainless steel pipes A358TP316L 16"SCH-10S having an
out of straightness 23 to 25 mm .Pipe length is around
11.800mtrs.Client rejected those pipes.Is B31.3 saying any thing about
out of straightness requirements. If their please provide me the
details. Also is their any manufacturing spec requirements for this?

regards,

Biju

[Raj]

Hi,

A 358 is specifies about variations in dimensions as mentioned below.
Refer 7.1.3 ??

7. Permissible Variations in Dimensions
7.1 Permissible Variations—The dimensions at any point in a length of
pipe shall not exceed the following:
7.1.1 Outside Diameter—Based on circumferential measurement, 60.5 % of
the specified outside diameter.
7.1.2 Out-of-Roundness—Difference between major and minor outside
diameters, 1 %.
7.1.3 Alignment—Using a 10-ft or 3-m straightedge placed so that both
ends are in contact with the pipe, 1⁄8in. [3 mm].
7.1.4 Thickness—The minimum wall thickness at any point in the pipe
shall not be more than 0.01 in. [0.3 mm] under the nominal thickness.

Other code A530 (Standard Specification for General Requirements for
Specialized Carbon and Alloy Steel Pipe) is specifies "Straightness
Tolerances" and mentioned in table-3. (But this is not applicable for
your case) - For your info only.

I just want to throw some light on your query !!!

Cheers!

Raj

[DHRUTI]

Hi u can refer the code - ASTM 999, where table no-2  shows the straight ness of piping.