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ASME UG-14 Requirements for forged bar

ASME UG-14 Requirements for forged bar

ASME UG-14 Requirements for forged bar

(OP)
Since the changes the UG-14 and the requirements of code cases 2155 and 2156 it has been almost impossible to obtain forged bar with additional transverse tests already completed.

I would have thought that a market for this requirement would have been created but this simply isn't the case.

Is anyone truly applying the rules of UG-14 and the two code cases, has everyone ignored it or does everyone avoid using forged or hot rolled bar?

I know this is an ASME question but, if there is an inherent risk in a material then the checks should be applied across all design codes even if they don't explicitly mention it.

RE: ASME UG-14 Requirements for forged bar

What do you wish to do with the bar?

RE: ASME UG-14 Requirements for forged bar

(OP)
UG-14 relates to making hollow cyclindrical shapes which would not only relate to shells but also to flat heads that conform to UG-43.

RE: ASME UG-14 Requirements for forged bar

Well,from what I have seen in the past,the use of rod or bar is a cost cutting measure.

"cookie-cutter" stuff if you will.

Rod and bar is mostly used for structural or mechanical applications. If you want to use it as a PVQ item....that is the reason for the Code Cases and restrictions.

Is it cost effective to make heads and shells with? Need a special application..be prepared for the NDE costs.

That is why it is not done at the mill.

Only my opinion.

RE: ASME UG-14 Requirements for forged bar

(OP)
I agree, it is based on cost.

When you make bespoke, one-off pieces then there is no requirement for a proper forging tool and you're right, the testing cost have to be absorbed, I don't have an issue with that, that's the compromise you have to make. It appears that there is an inherent flaw in the method of manufacture and we need to remove the risk that this flaw can create. That's fine.

I don't however believe that only a few manufacturers fall into the requirements of UG-14 and I'm starting to believe, maybe wrongly, that some manufacturers either don't know about it or aren't considering it.

It could just be my frustrations coming out but I see many examples in other industries, like accumulators, that are made with heads to UG-34.

Who knows, I'll keep looking.

RE: ASME UG-14 Requirements for forged bar

deanc:  when you can't get the required material in the required finished form article on anything approximating a reasonable schedule- if at all- your only remaining feasible option for small articles is to reach for barstock. Considering the cost of some of the base metals these days, you can understand why suppliers would be reluctant to re-stock certain forged-in-shape items, whereas bar can usually be had.

RE: ASME UG-14 Requirements for forged bar

moltenmetal

Understand and do not disagree.

I would just try for something else first. Then if one must go with bar,just be prepared for what comes with it.

Pay up front or pay in back. Nothing is free.

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