There_Will_Be_Mud
Mechanical
Apologies if this has already been asked - I did a search and couldn't find anything. Also, this isn't necessarily a question specific the ASME BPVC, but I figured you fine people would have an answer.
I've always heard it's generally considered good practice to avoid having any sort of overlapping HAZ or overlapping welds. However, even if it isn't the best practice code does allow you to overlap welds. My question is what is the difference between overlapping HAZ/welds and multipass welding/repair welds? Is there a significant difference in the resulting microstructure of the steel and if so what is it? Are there any rules that govern how many times an area can be reheated or when overlapping HAZ is acceptable and when it isn't? Mostly I'm asking with regard to plain carbon steel / austenitic stainless.
Any advice is appreciated thank you!
I've always heard it's generally considered good practice to avoid having any sort of overlapping HAZ or overlapping welds. However, even if it isn't the best practice code does allow you to overlap welds. My question is what is the difference between overlapping HAZ/welds and multipass welding/repair welds? Is there a significant difference in the resulting microstructure of the steel and if so what is it? Are there any rules that govern how many times an area can be reheated or when overlapping HAZ is acceptable and when it isn't? Mostly I'm asking with regard to plain carbon steel / austenitic stainless.
Any advice is appreciated thank you!
