Forged Nuts and Bolts

[nickypaliwal]

Can forged Nuts and Bolts eg A182 UNS 31803 be used for valves ? As I understand, the bolts and nuts are special items that will need special heat treatment suchas quenching for surface hardness for the threads.

In case vendor offers forged bolts, is it acceptable ?

 

[gerhardl]

You mention 'valves' without referring to any actual valve standard or requirement. The actual standard or end-users description/requirements is what sets the limits to what is allowed.

Forged material bolts in good quality (quality control and/or tests certificates?) could under circumstances be at least as good as non-forged bolts.

If fabrication methode is not described in the requirement, and the bolts cover the other quality requirements (material, strength, dimension etc. etc.), I can see no reason that forged bolts could not be used.

 

[nickypaliwal]

It is a Ball Valve with Nuts and Bolts requirement as A193 B8MLCuNA and A194 8MLCuN or A193 B8M and A194 8MA.

 

[gerhardl]

Then if the offered bolts comply with the specifications they are OK, with any deviation they are not.