Re: [MW:28987] Backing gas as per API RP 582

we use back gas purging only if consumable MAT no have self purge but SAMW electrode  have covering and work as purging during welding  

no any purging for SMAW process.

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From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of BCK 055 <bck055@gmail.com>
Sent: Monday, January 28, 2019 4:13 AM
To: Manoj John; materials-welding@googlegroups.com
Subject: Re: [MW:28986] Backing gas as per API RP 582

 

If PQR using purging gas, wps must follow.

First time we heard back purging for SMAW

From: Manoj John Sent: Monday, January 28, 2019 09:33 To: materials-welding@googlegroups.com Reply To: materials-welding@googlegroups.com Subject: [MW:28982] Backing gas as per API RP 582

Dear Experts,

As per clause 7.3 of API RP 582 Ed. 2016 back purging required for GTAW & GMAW process but no where I could found for other process like SMAW.  Is it mean that if we do welding with SMAW process back purging is not required?

Please share your interpretation.

Thanks and regards

Manoj.

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