Is it allowed to heat the weld for alignment?

[QCJT]

The design code is B 31.3. Production uses heat extensively to align the joints and we are talking about 304H steel small size piping (pig tails). It's GTAW welding, so they simply use the rod tip to heat the existing weld and sometimes the joint comes into position without additional force applied, just due to thermal shrinkage but sometimes they also apply some force. Is this a point of concern?

 

[metengr]

Please do not cross post.

 

[QCJT]

Metengr, in repeated the post in two different topics for getting the input from various disciplines on the issue. Here I'm asking more about the metallurgy of the issue and in the welding posts, it's more about the code requirements.

Thanks however and I will note for future posts
Regards

 

[cloa]

In that case post this thread in ASME forum.

 

[QCJT]

Thanks cloa, will do - didnt see this forum at first