On Dec 5, 2007, at 9:13 AM, Hafiz A Alvi wrote:
> mill tolerance of 12.5% ( it is not for ASME B31.3) is for ASTM
> A53 or ASTM A106
This tolerance is (was) a fabrication issue. It's pretty easy to get
pipe made to tighter tolerances, presumably because fabrication
techniques have improved.
Christopher Wright P.E. |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania1864)
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