Dear k zamani,
A 350 Gr P22 is not listed/stated in ASME IX..may be you meant a A335 Gr P22 (2.25Cr–1Mo). Based on API 582 back purging is required for the GTAW and GMAW processes for welding materials having a nominal chromium content greater than 2 1/4% unless the joint is ground or back gouged to sound metal
Tong2je
On Sat, Aug 22, 2009 at 5:56 PM, Ahmed Osman <a.osman81@yahoo.ca> wrote:
there is nothing A 350 Gr P22 but " A 335 " Gr P22 and it dose not need pack purging
Best Regards ,ENG. Ahmed Osman
TEL. +213 793092233Received: Saturday, August 22, 2009, 7:12 AM
From: kambiz zamani <kambiz_zamani50@yahoo.com>
Subject: [MW:2985] A350 Gr P22 purging
To: materials-welding@googlegroups.com
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Dear All , i want to know that A350 Gr P22 required to argon back purging (GTAW process) or not? regards ,k zamani IRICO. cswip3.1 welding inspector
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