PWHT after welding is advisable for better properties.
From: Zakaria ghrab <zakaria.ghrab@gmail.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, January 16, 2013 1:22 PM
Subject: [MW:16522] P11 alloy steel Grade Material - PWHT scope
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Dear experts,
I have one doubt.
We have P11 alloy grade material pipe, size 8" SCH 80, thickness = 12.7 mm. So according ASME construction code PWHT is not mandatory.
For the same piping, we had one non conformance (pipe damage before installation). To release and close, client request to confirm thickness and dimensional check. We get for thickness measurement around 15 mm for all pipie lenght.
So, now client request to perform PWHT for welding joints related.
ISO Dwg mention 8" SCH 80.
How we can release ?
Regards.
--زكرياء غراب
GHRAB Zakaria
+212606588856
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