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Hubbed joints. use of them

Hubbed joints. use of them

Hubbed joints. use of them

(OP)
Dear friends:

I'm a mech designer that have a problems to determine when the equipments must have a hubbed joint (BEM heat exchangers shell to tubesheet joint).

If my client uses 100% radiograph , it is mandatory to use them? or additionally the fluid must be lethal. Now, I'm using corner joint (because fluid is NH3, toxic but not lethal)and i'm applying RT2 cathegory ---> 100% long. joints + 100% crosses and i'm making UT to this problematic joint (shell to tubesheet joint), is it possible or acceptable?.

Thank's in advanced for your oppinion.

José Luis Gómez R.

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