Dear All, Please note that we ar

[jerin james]

Dear All,

Please note that we are currently manufacturing a tube bundle which is a replacement for one of the end users.
The complete bundle is SS410 material (Tube-SA 268 TP 410 ,tubesheet -SA 182 F 6 a Cl 2, baffles,Sliding bar and support plates-SA 240 410S). The existing equipment(bundle & shell) is not subject to PWHT . However our welding engineering has raised the concern that the bundle needs to be subject to PWHT because of clauses in tables UHA 31-1 & UHA 32-1.

The baffle thickness is 10mm Thk and there is 6mm fillet welding of baffle to sliding bars. The sliding bar is 26mm Thk which is welded to the tubesheet (groove welding-13mm up and down). tube (19.05 OD *1.65mm thk) to tubesheet (170mm Thk) is strength welded (1.2mm weld).

I would like to have your advise on PWHT requirements because of welding of SS410/SS410S.

Thanking you .

Regards
Jerin

 

[DekDee]

If your Welding Engineering department has stated PWHT is required and you (obviously being production) do not agree.
Why bother having a Welding Engineering department in the first place ?
Sack them all and then come on here and we will happily give you all the info you need to make a non-compliant weld.

 

[0707]

Don´t duplicate the threads.

luis

 

[jerin james]

Luis,

Sorry it was a mistake..not able to delete the same

 

[jerin james]

Dear dekee,

I'm from design and Estimation department.. we
Dodmt want to consider PWHT if uts not required as per code ,it just adds further to cost .

Thanks
Jerin

 

[kingnero]

If I was a welding engineer in your company telling you PWHT is necessary and Procurement told me to make it without PWHT based on dr. Google, I'd get that in writing, save that document somewhere safe, and I'd make it without PWHT. And let you deal with the aftermath, gloating from behind that document.

 

[jerin james]

kingnero ,

no one from procurement is telling PWHT is not required in our case. What i need to do is know is if it actually required for the entire bundle or can be exempt from code. We have to not that the existing bundle was not subject to PWHT & it was code stamped.

Thanks
Jerin