can you refer me the standard that mentioned this thickness limit for GTAW
Regards
On Mon, 17 Feb 2014 11:14:15 +0530 wrote
>NO - GTAW is not qualified to weld any base metal thicker than 11mm.
-----Original Message-----
From: materials-welding@googlegroups.com on behalf of Ali Samdani
Sent: Fri 2/14/2014 11:41 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:20106] Combination PQR to one WPS
Just in case if I specify in my WPS that I'll use GTAW process for root
pass only and SMAW process for fill passes. Keeping in view SMAW process
qualification range (up to 14.22 mm), will my WPS qualification range not
up to 14.22 mm?
Regards,
On Thu, Feb 13, 2014 at 7:35 PM, John Henning
> The answers you have received are correct but somewhat incomplete.
>
>
>
> If you are going to combine PQR's to make a single WPS, the essential
> variables for each process must be met - see QW-200.4. Qualified base
> metal thickness is an essential variable and is determined from QW-451.1
> and PQR base metal thickness. From QW-451.1, for your example, each
> process is limited to base metal thickness range of 1.5mm to 2T. Thus,
> your GTAW process is limited to a maximum base metal thickness of
> 2*(5.54mm) or 11.08mm while the SMAW process is qualified for welding base
> metal thickness up to 14.22mm. The base metal thickness range for the GTAW
> process is the limiting condition. If a combined WPS is written from
> these two PQRs, your qualified base metal thickness range is: 1.5mm *<*T
> *<* 11mm. You cannot use the great qualified thickness range for SMAW
> since GTAW is not qualified to weld any base metal thickness greater than
> 11mm.
>
>
>
> I hope this makes the issue more clear.
>
>
>
> John A. Henning
>
> Welding & Materials
>
>
>
> *From:* materials-welding@googlegroups.com [mailto:
> materials-welding@googlegroups.com] *On Behalf Of *veera raghava
> kommisetti
> *Sent:* Thursday, February 13, 2014 6:06 AM
> *To:* materials-welding@googlegroups.com
> *Subject:* Re: [MW:20090] Combination PQR to one WPS
>
>
>
> No
>
>
>
> On Thu, Feb 13, 2014 at 10:46 AM, Original Man
>
> Back ground: One Welding procedure was qualified with GTAW process with
> base material thickness 5.54 mm with material API 5L Gr.B And Another
> was qualified with SMAW process with base material thickness 7.11 mm
>
> Question: May this both PQR support a WPS with GTAW + SMAW process for
> the base material thickness from 14 mm for the same material and same
> variables ?
>
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