Hi Maulik,
As replied earlier by Mr. K.G Pandian, it's not mandatory to have have the IGC testing done for SS 347 following PWHT. However if the intended service is for polyhtionic acid environment. A thermal stabilization as mentioned below is often recommended by the specifications.
If so the weld has to undergo thermal stabilization in addition an IGC test conforming to A 262 Practice E at least. Some clients' may have more demanding requirements as below
Those needs to be clearly spelt out clearly in the specifications to help material procurement as well as for establishing the PQR.
What was specified in your project specifications? Could you please share to avoid ambiguity?
Thanks.
Pradip Goswami, P.Eng,IWE
Independent Welding & Metallurgical Engineering Specialist & Consultant.
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299
- A thermal stabilization heat treatment at 900ºC (1650ºF) may be applied to chemically stabilized austenitic stainless steels after welding to reduce sensitization and PASCC susceptibility. This heat treatment may be difficult to apply in the field.
-
Susceptibility to PASCC can be determined by laboratory corrosion testing according to ASTM A262 Practice C. A sensitizing heat treatment is applied to low-carbon (L) and chemically stabilized stainless steel grades prior to testing
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kannayeram Gnanapandithan
Sent: Monday, March 07, 2016 10:18 PM
To: materials-welding
Subject: Re: [MW:24444] IGC AFTER PWHT
if it is client requirement ,yes, otherwise not required
THANKS & BEST REGARDS,
KG.PANDITHAN, IWE, AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
On Mon, Mar 7, 2016 at 10:18 PM, Maulik Thakkar <mlkthakkar2@gmail.com> wrote:
Dear experts,
Is it require to have IGC testing in PQR if representatives seam undergoes in PWHT.
If yes then pls provide the reference.
MOC: SS347
COC: ASME SEC VIII DIV1Regards,
--
Maulik
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