Re: reply to copper for High pressure relief vent piping

From: <Christopher>
Date: Sat Jul 02 2005 - 23:23:00 EDT

On Jul 2, 2005, at 5:13 PM, Al wrote:

> brazing is legal under the welding codes but this is not the issue.
> the issue is whether the material is code rated
I've only seen the 'type K' designation used for domestic fuel gas piping. It's fairly common there, but the applicable pressures are only a few psi. ASTM B88 (Seamless Copper Water Tube) uses (or did use in 1966) the K, L, and M type designations for various tempers of substantially pure copper (99.90% min Cu). The material isn't permitted for ASME PV Code use, so I'd say it's not permitted for piping code construction. Whatever material you end up using for ASME Code piping work has to be (1) permitted by the Code in the sizes you need and your service conditions (2) covered by a qualified brazing specification. Rules for qualification are found in the code.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=NITdw02jZTxUqvmKB-7Yg018NGdOOPpBcfA-sg5pbksGelJhGGfKUa5qSPPGOh9x0V6WcsVxMqbgNw">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 Sat Jul 02 23:23:00 2005