3 PWHT Cycles for test coupon SA-516-60

[Dream91]

Can plate Sa-516 Gr70 withstand 3PWHT cycles ( on other word will it pass ? )

Plate thickness : 14 mm
What about the simulation applied also for pipes - 106Gr B and flanges 105 ?

 

[metengr]

Yes, for plate and stated materials.

 

[Dream91]

It is weird . I ask the plate supplier to do 3 cycles they said we cannot guarantee to you that it will pass . we will do it only for two cycles !

This is a requirement from client !

Can stockist do the test or it has to be from mill ? Also How I know theoretically that a certain material would probably withstand n number of cycles ?

Thanks

 

[metengr]

Can stockist do the test or it has to be from mill ? Also How I know theoretically that a certain material would probably withstand n number of cycles ?

Look at the actual strength stated on the MTR, depending on how far above the minimum required is your margin. For each PWHT cycle the strength can degrade slightly.

 

[Dream91]

Is it possible to purchase the material and do the test in third party lab? Or the mill has to do the test?

 

[btrueblood]

Yes, you can have materials certified by a 3rd party; the trouble being if it fails, you now own a lot of material that doesn't meet your requirement.

 

[Dream91]

Yes , thats my concern!!

If you cannot go to mill for small quantity then what is the best to do?

 

[weldstan]

Stockists often perform such tests when orders are not large enough for a mill run purchase.