Re: Re: [MW:28101] Thickness of weld metal qualified on two or more pipe as per ASME Sec ix for welders table QW-452.1 (b)

Greetings Gentlemen,

I have scrutinized your below query and its comes with conjunction to CASE A acceptable and CASE B not acceptable, please correct me / advise me if i am wrong.

CASE 1) 

A) COMBI WPQ

GTAW-2''-3mm dep

SMAW-2''-2.54mm dep

B) COMBI

GTAW-4''-3.1mm dep

SMAW-4''-10.39mm dep

With both collaboratively gives a result as per below.

Dia 1'' O.D / 12.20mm GTAW dep / 25.86 SMAW dep which is acceptable as per below interpretation of ASME section IX 1993 edition.

Interpretation: IX-92-59
Subject: QW-306, Combination of Welding Processes; QW-452.1 and QW-452.3, 
Performance Qualification Thickness Limits and Test Specimens 
Date Issued: February 22, 1993
File No: 92-206
Background: The combination of welding processes and pipe diameters listed below were used for performance qualification:
(1) 2 in. Sch. 80 (.218) pipe with open butt using GTAW process.
(2) 2 in. Sch. 160 (.343) pipe with consumable insert and fill pass using the GΤAW process and the remainder welded with SMAW process.
(3) 6 in. XXS (.864) using SMAW process with backing.
Question: Using the combinations listed in the Background, in accordance with QW-306, Note 2 of QW-452.1(b) to determine maximum thickness qualified, and QW-452.3 for minimum diameter qualification, is the welder qualified to weld on unlimited thickness and diameters above 1 in., using either an open butt joint or a consumable insert with the root layer deposited with the GTAW process and the remainder deposited with the SMAW process?
Reply: Yes. 

CASE-2) 

A) COMBI WPQ

GTAW-2''-3mm dep

SMAW-2''-5.08mm dep

B) COMBI

GTAW-4''-3.1mm dep

SMAW-4''-20.78mm dep

Answer: All are same as per CASE 1 except of SMAW noted as unlimited, which is not acceptable as ASME SEC IX QW-452..1 (b) states Thickness, t , of Weld Metal in

The Coupon, in. (mm) regardless of note 2, a single 13mm coupon requires over with a three layers.

Conclusion

Though note 2 speaks ''maybe applied to the production, which is fully depends upon the owners satisfaction, for above 2 cases can be accepted by them or even rejection with new qualification.             

____________ 

Thanks & Regards,

MOHAMED          MUNEEB           MAHABOOB

JAPID,

JAZAN-IGCC-001

M:                         +966(0)59 607 2237

O.E:     mahaboob.muneed@aramco.com

P.E:                  muneebslsa@gmail.com

 

From: Ramesh

Date: 2018-07-18 08:56

To: materials-welding

Subject: Re: [MW:28092] Thickness of weld metal qualified on two or more pipe as per ASME Sec ix for welders table QW-452.1 (b)

Hi

 

From the attached WPQ record, it clearly indicates, 

Test A was welded with 2"NPS x 5.54 Thk & Test B was welded with 4"NPS x 13.49 Thk.

 

Test A was welded with GTAW 2mm & 3.54mm SMAW , So his qualification is GTAW up to 4 mm & SMAW up to 7.08 mm, and Dia qualified 25mm & Over – Example WELDER X

 

Test B was welded with GTAW 2mm & 11.49mm SMAW , So his qualification is GTAW up to 4 mm & SMAW up to 22.98mm, Dia qualified 73mm & Over - Example WELDER Y

 

So,

GTAW 2mm only deposited in either case and  its qualified up to 4 mm only, Not 8 mm.!

SMAW 11.49mm only deposited and  its qualified up to 22.98 mm only, Not unlimited.! 

 

QW-452.1 (b) Note (2) shall be used when the diameter restriction along with thickness limitation comes in pics.

Example, In your case Test B i.e. WELDER Y cannot weld 25mm Dia pipe.

Thanks and Regards

Rameshkannan Devaraj

"What you have learned is a mere handful; What you haven't learned is the size of the world – Avvaiyar"

On Tue, Jul 17, 2018 at 4:47 PM Babur Khan <mbabur.bwp@gmail.com> wrote:

Greetings,
Dear professionals,
Need your opinions and experience on below case.
Welders qualification as per ASME sec. ix for thickness qualification, can we use different thickness pipes as per Table QW-452.1 (b) Note (2) Two or more pipe test coupons with different weld metal thickness may be used to determine the weld metal thickness qualified and that thickness may be applied to production welds to the smallest diameter for which the welder is qualified in accordance with Table QW-452.3
 One welder with below thickness qualifications.
Test A:
GTAW 4mm  &  SMAW 7.08mm qualified.
Test B:
GTAW 4mm  & SMAW 22.98 mm qualified.
His qualification for GTAW 8mm? and SMAW Unlimited as per above note 2?
Noted: for reference images are attached.
Waiting for your valuable comments with references.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Best regards,
M. Babur Khan Lashari
Whatsapp# 00923346186285
Cell# 00966 582774568


--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.