Re: [MW:31420] Clarification

it seems that 

You do not want  to use ROOT PASSS WITH FLUX CORED filler wire and want to use solid wire with backing gas.

The  query is tricky one.

it has many variables 

Joint design :Welding with backing  to  Welding without backing

Backing gas :Addition of backing gas with Solid  filler wire

Qw 404.23  and QW 402.5 are there but not that clear to support your  query.

Advice :Qualify PQR with backing gas with Solid Wire ER308L for root pass as well as filler passes.

On Thu, 10 Sep 2020, 12:19 K K, <karan.hbl@gmail.com> wrote:

Dear All, 

Please clarify some below points. 

I have previously qualified PQR, details as below.

PQR with ASME sec.IX and B31.3 and API 582.  

Process - GTAW (Manual)

Base Metals - ASTM A312 TP304L to STM A312 TP304L

P.No - P8 Gr.1 to P8 Gr.1 

Test coupon Thickness - 5.54 mm

First Process - GTAW - SFA - 5.22,  AWS - R308LT1-5 , F.No - 6, 

A.No - 8, Size of Filler .M - 2.2 , F.M.Product from - Flux-cored, Weld Metal Thickness - 

1.5mm.

Second Process - GTAW - SFA - 5.9,  AWS - ER308L , F.No - 6, 

A.No - 8, Size of Filler .M - 2.5 , F.M.Product from - Solid, Weld Metal Thickness - 

4.04 mm. 

According to red highlighted (Second process) can I use to prepare WPS.

And Thickness range 1.5 mm to 8.08 mm, other all parameters in WPS shall be as above in red highlighted. 

I don't want to use the first process.

Please let me clarify, if any changes, please guide me to prepare WPS.

Regards

KK

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