Thursday, September 23, 2010

RE: [MW:7166] Welder Qualification on WPS with PWHT

Hi,
1. When there is no supplementary essential variable requirement (e.g. PWHT & impact test), use QW-451 for max & min T qualified.
2. Where there is supplementary essential variable requirement (e.g. PWHT & impact test), use QW-451 for max T qualified and use QW-403.6 for min T qualified.

In your case,min.Thickness shall be as per QW 403.8 and according to QW451.1.When you use this WPS for less than the 20mm thickness(without PWHT),you need to do a additional PQR without PWHT.(As per QW407.1 "no PWHT" need seperate PQR)
 
Thanks & Regards,
 
(Karthik)
Karthikeyan.S
QA/QC Manager
Getabec Energy Co.,Ltd.
379,Moo6,Soi8,Nikhomphatana,
Rayong-21180,
Thailand.
Phone: 0066 38 897035-8 (Off)
Fax: 0066 38 897034
Hand Phone: 0066 892512282


--- On Thu, 9/23/10, Larry <quality@unieng.com.au> wrote:

From: Larry <quality@unieng.com.au>
Subject: RE: [MW:7163] Welder Qualification on WPS with PWHT
To: materials-welding@googlegroups.com
Date: Thursday, September 23, 2010, 11:50 AM

Hi Karthik,

 

If I follow table 451.1 of ASME IX, it will give the WPS a minimum thickness of 4.8mm.

 

The WPS is with PWHT procedures, then the minimum thickness of 4.8 mm would not be subjected to PWHT as per table 331.1.1 of ASME B31.1. Therefore, logically you can not indicate 4.8mm as the minimum thickness on a WPS with PWHT procedure.

And because the WPS is with PWHT procedure, you can only use this procedure on welding materials that would be subjected to PWHT, and as per table 331.1.1 of ASME B31.1, the minimum thickness is 20mm.

 

What do you think?

 

Again thanks for your reply.

 

 

Cheers,

 

Larry

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Karthik
Sent: Thursday, 23 September 2010 1:18 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:7159] Welder Qualification on WPS with PWHT

 

Hi,

WPS/PQR thickness qualifications follow Sec.IX.Table 331.1.1. of B31.3 -requirements of Heat treatment.It is apply during PWHT of PQR and production welding.

For welder Qualification No need to do PWHT,Because it is not an essential variable for Welder Qualifications.

 

Thanks & regards,

 

(Karthik)

Karthikeyan.S

QA/QC Manager

Getabec Energy Co.,Ltd.

379,Moo6,Soi8,Nikhomphatana,

Rayong-21180,

Thailand.

Phone: 0066 38 897035-8 (Off)

Fax: 0066 38 897034

Hand Phone: 0066 892512282



--- On Thu, 9/23/10, Larry <quality@unieng.com.au> wrote:


From: Larry <quality@unieng.com.au>
Subject: [MW:7149] Welder Qualification on WPS with PWHT
To: materials-welding@googlegroups.com
Date: Thursday, September 23, 2010, 8:33 AM

Hi There,

 

I'm developing a WPS with the following criteria:

 

Welding Code: ASME IX

Construction Code: ASME B31.3

 

Material: ASTM A333 / API 5L

Thickness: 44.45mm; 400 NB pipe

Preheat: 79°C

PWHT: 593°C - 649°C as per table 331.1.1 of ASME B31.1

 

My question, is what is the thickness range, should I follow table 331.1.1 of ASME B31.1 for the minimum thickness, and table QW-451.1 of ASME IX for the maximum thickness?

 

Assuming all the necessary test on the coupon for the PQR have passed, and we need to do some welder qualification on the same WPS, do we need to do PWHT on the test coupon?

 

Thank you in advance.

 

 

Cheers,

 

Larry

 

 

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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