Re: mill tolerance for pipes by ASME B 31.8/ B31.4

From: <Christopher>
Date: Wed Dec 05 2007 - 11:48:00 EST

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 <a href="/group/PipingDesign/post?postID=wPzaKe9UmxzQPkPKYRL99nz1qT7DlTRBGZak8KQxwNqsvaF22pBE3HcOOgsBkHSPiVXEu2iCAtgrdw">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Wed Dec 05 11:48:00 2007