[MW:6810] MW:6806- tests for PQR using R 308 LT1-5 flux cored filler rod

Hi Hrishi,

 

Flux cored GTAW would require some practices and adjustment of welding parameters over  solid wire GTAW. The arc is soft, less penetrating and requires wider fit-up gap and a steady keyhole technique all along the length of the weld.

 

Weld procedure and performance  qualification test would be as per ASME Sec-IX (if that's the code of qualification).

 

Note: a change from solid wire  to Flux-cored wire is an essential variable both for procedure and performance qualification.

 

I hope the attached articles would be of help to you.

 

Thanks

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Ontario Power Generation Inc.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

QW-404.23 A change from one of the following filler

metal product forms to another:

(a) flux cored

(b) bare (solid) or metal cored

(c) powder

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of K.M Hrishikesan
Sent: Tuesday, August 31, 2010 9:37 AM
To: materials-welding
Subject: [MW:6806] tests for PQR using R 308 LT1-5 flux cored filler rod

Dear members

 

Can anybody suggest what are the special test requirements for performing PQR on a 6"dia, 8 mm thk. SS 304 pipe using TGX-308L flux cored filler rod for root run.

Subsequent passes are by conventional TIG wire followed by Arc welding.

 

Regards

Hrishi

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