PWHT Requirement for welding of SS410/SS410S

[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

 

[jerin james]

@0707, @ironic metallurgist, @EdStainless

Please advise your thoughts on requirement of PWHT for welding of NON-PRESSURE parts to pressure parts in line with code.

Thanks
Jerin

 

[0707]

jerin james

I would like to help you, but do your work, and say exactly where do you want to go, do not use me.


luis

 

I kind of agree with 0707 here. The answers you seek are all found in the Code. Ctrl-F is your friend and guide.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[kingnero]

That's also a first for me, hearing that you should use the code as a guide

 

That's not what I said.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[goutam_freelance]

 

[jerin james]

@goutam_freelance,

thank you so much for the above post. But this interpretation says when attachments are welded to a corrosion resistant weld metal ,so will this be applicable if a sliding bar is welded to a tubesheet or if a sliding bar is welded to the baffle.

Thanks
Jerin

 

[EdStainless]

JJ, note that those interpretations are related to weld overlay material.
And are your parts non-load bearing?

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[0707]

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 .

Did you finish your work? Let us know how you have done it.

regards

luis

 

[jerin james]

@Edstainless ,@0707

Finally it ended up as complete PWHT of tube bundle : Yes

Couldn't convince the QC of exemption for PWHT for welding of non-pressure parts like tie rods and sliding plates.

Anyways thanks for the replies.

Thanks
Jerin

 

[goutam_freelance]

Sorry for delay in reply ! I could not locate any further relaxation in PWHT requirement in Sec VIII-1. I would imagine that you could build a weld overlay and weld the sliding bar to tubesheet to obviate the PWHT requirement. This may be a suggestion for future.