Local PWHT of ASME VIII Div1 Vessel

[YMech]

We have a local heat matching (Miller Proheat 35) and are fabricating a Vessel to ASME VIII, div 1 - requiring PWHT (made of SA 516-70 material). There are 4 longitudinal seams and 5 circumferential seams. Does anyone have experience in using local PWHT on longitudinal seams? Would like to do heat treat each weld at a time, so would need to do the long seams before getting into the circ seams.

 

[racookpe1978]

You will need to get with a professional heat treat company who can work in the field.

Try Analytic Stress,

http://www.analyticstress.com

 

[metengr]

If you are fabricating a vessel, I would outsource the PWHT to a heat treatment vendor that has a car bottom furnace or oven to perform the PWHT on the entire vessel at once and done only once.

 

[10mm]

We have a 60" x 120" that we are going to have local PWHT. I have never tried this method, but find a HT company that specializes in this, and they can take care of you. I believe they use heat blankets. What is the wall thickness thickness of the vessel?

There is no situation so bad that you cant make it worse. Cmdr_Hadfield