ASME thick wall expansion joint material 1

[Quentin Nguyen]

Dear engineers,
It is the first time I design a thick wall expansion joint follow ASME sec VIII div 1 to get U Stamp for the heat exchanger.
I am confusing the material use for calculate and fabricate the expansion joint.
Is it SA-240 304 or SA-182 F 304?
I'm using SA-182, but the search result on the internet show SA-240 (plate type).
Dose someone here has experience on this part?
Thank you so much for the help.

 

[SnTMan]

Quentin Nguyen, thick walled joints are generally formed from plate material. Usually match the shell metallurgy, although need not necessarily.

First time huh? I'd just advise you they can be difficult to design and its possible it cannot be made to work in a given design, in which case use of a thin (bellows) joint must be investigated.

Best of luck

MIke

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[mk3223]

The SA-240 and SA182 are the Codes of the similar material and used fir the different production methods.
Based on the process design condition, i.e. process, P&T, etc., the vendor may propose the suitable expansion joint with the proper thickness and correct material Code.

 

[Quentin Nguyen]

Thank SnTMan
It's strange that I ordered that thick expansion joint in SA-182 F 304 (forged condition), but no supplier complain about that.

 

[SnTMan]

Quentin Nguyen, you should challenge them on this. If your supplier doesn't know the difference between plate and forging, you need a new supplier

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Quentin Nguyen]

They make me wonder this can be made in forged condition.
I'm changing my spec. into SA-240 and re-order now.

Thank SnTMan

 

[SnTMan]

"They make me wonder this can be made in forged condition."

I suppose it's possible, but in 25 years in the biz, I never saw it


The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Quentin Nguyen]

I will turn into a rock if my AI ask me about the material for this expansion joint Why is it SA-182? hahahahah