12.5% Mill Undertolerance
12.5% Mill Undertolerance
(OP)
Hi,
I understand that the pipe wall thickness at maximum mill under tolerance is considered at 12.5%.
Where can I find this information in the ASME code book ? UG-16(d) says "The manufacturing undertolerances are given in the several pipe and tube specs listed in the applicable tables in SubSection C"
I am unable to find the table of paragraph that actually mentions that the undertolerance in 12.5%.
I understand that the pipe wall thickness at maximum mill under tolerance is considered at 12.5%.
Where can I find this information in the ASME code book ? UG-16(d) says "The manufacturing undertolerances are given in the several pipe and tube specs listed in the applicable tables in SubSection C"
I am unable to find the table of paragraph that actually mentions that the undertolerance in 12.5%.





RE: 12.5% Mill Undertolerance
RE: 12.5% Mill Undertolerance
Refer to e.g. ASTM A312 (or ASME SA312 in sect II-A) for details, when you have stainless steel pipe.
RE: 12.5% Mill Undertolerance
It is either in the product spec SA312, or in the general spec that it references SA530 (as an example).
You may need both specs.
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Plymouth Tube
RE: 12.5% Mill Undertolerance
The pipe we have is a 6" SA-53 Grade B Type E pipe.
RE: 12.5% Mill Undertolerance
You'll find the wall thickness tolerance for SA-53 in Section II Part A 2013 under SA-53 / SA53M in paragraph 12.3 (page 167 of the print version, page 217 of the pdf).
Note that tolerances on weight and diameter are the other sub-paragraphs of paragraph 12.
RE: 12.5% Mill Undertolerance
RE: 12.5% Mill Undertolerance
Permissible variation in dimensions are given in applicable specifications
For example Clause 12.3 of SA-53 or clause 16.3 of SA-106
RE: 12.5% Mill Undertolerance