Different brands SAW wire in single PQR

[Muhammed Ibrahim PK]

Gents,

I have encountered a WPS where manufacture used different brands of SAW wire and flux in single PQR to cover the range of various brand.

Is it permitted to qualify a single PQR with different brand in same weld ?

We can make separate PQR with each brand and can combine those PQR in a single WPS. But welding a single coupon using different SAW fire /flux combination is not yet experienced before. Could you please shed some light on this scenario ?

Plate : SA 516 Gr.70, 

Wire F7P8EH12K :  ESAB/LONCOLN/Bohler

Thanks & Regards
Muhammed Ibrahim PK

[Charles Jacob]

Dear, 

If the company used different brands of wire in a single test coupon,  then it can be considered as a change of variables like process, filler wire etc, as per QW-202.2(b).  In this case, the deposited weld metal thickness for each brand of wire shall be noted and the range of values arrived at using the table QW-451.1

Hope this helps.

Regards, 

Charles Jacob 

Welding Consultant

Magnum Consultancy Services

Mob:7034331779  

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[Muhammed Ibrahim PK]

Dear Mr. Charles, 

Thank you for information provided on this matter.

Reg, 

Ibrahim

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[Kannayeram Gnanapandithan]

Also ref 404.9.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Thu, Feb 6, 2020 at 12:08 PM Kannayeram Gnanapandithan <kgpan...@gmail.com> wrote:

pl ref QW 404.35.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CALOPgmPbT6vf%3DX5mmNUB%2B5Da43BofT8vpaace%3D4SFK3MxqOAqQ%40mail.gmail.com.

[Amitabh Bhattacharya]

Hello

Consumable Manufacturers mentioned in the e-mail are globally renowned for their performance. Even though fluxes are  said to be "neutral"-  results obtained of each manufacturer will be different. Hence good Engg judgement / practice will be to use flux-wire combination of one trade/supplier.  You may not experience any problem as long the wire/electrode (SFA 5.17 EH12K) remained as single brand .  'As welded" mechanicals will be fine even if some flux mix -up.

In your case, however, coupon is being prepared to qualify with PWHT & Impact  tested @-80degF.  You are suggested to look at QW-254 & QW 404.35 of Sec IX for direction.

In my opinion, NEVER mix up wire & fluxes of different manufacturers when qualifying /developing WPS/PQR.

Hope this helps

Amitabh 

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