Narrow Gap Welding

[WE17]

HI All,
I have some question regarding Narrow Gap Welding,
my question applicable for AWS D1.1, I need to improve Joint design from Double V Groove Weld(1/3&2/3) to Narrow Gap Welding to reduce consumable consumtion and make a faster welding
Welding Machine I used is SAW,
So Based on this question above would you like to advice some Guidance(like Travel Speed, Ampere, Volt, Angle,etc) ?Where I can find it at Code since AWS D1.1 Figure 3.3 & 3.4 not mention about it?

Thanks n Regards

we17

 

[gtaw]

Narrow Gap Welding is not prequalified since it does not utilize a prequalified joint detail.

Lincoln Electric should provide you with all the details.

Best regards - Al

 

[WE17]

Hi GTAW,
Thankyou for answer my quetion,

http://www.lincolnelectric.com/assets/us/en/literature/mc09109.pdf

This is what I found from Lincoln,
So based on your statement above your mean :
1. Since this is not an prequalified Joint so this is not a standard of AWS D1.1 so I can not use narrow gap welding for welding all structural Joint ? OR
2. I can use Narrow Gap Welding if I qualified it based on Clause 4 aws d1.1 but for my WPS-PQR only qualified for Narrow Gap Welding and
I can not use it for another Joint since aws make a limitation in table 4.5 aws d1.1?

Please avice , sorry about my english...

Thanks n Regards

we17

 

[gtaw]

It sounds like you understand perfectly. You can use the Narrow Gap Welding process if you demonstrate it will produce the required results. Qualify the WPS in accordance with Clause 4 Parts A and B. If notch toughness is a requirement, you must also comply with Part D.

Best regards - Al

 

[WE17]

Hi GTAW,

Thankyou very much for your advice,

Cheersss

we17

 

[gtaw]

Happy to help.

Best regards - Al