Dear Sirs,

at present we have a project about some vessels, which will be used for transporting some medium by air freight again and again. Therefore this vessels have to be as easy as possible.
Acc. ASME VIII Div. 1 U2 all pressure bearing parts, which can be computed, must be computed.
In our case the ASME-Code covers all this pressure bearing parts.
But, nevertheless, is there any possibility to apply a bursting test for optimizing the wall-thicknesses?

Thanks in advance for response.
Rainer

To optimise You can do it but better to ask Enduser/cleint.
If you are end user or cleint you can refer H.Bednar book for calcualtion.

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Niraj

UG-101 can be used "for vessels or vessel parts for which the strength cannot be computed with a satisfactory assurance of accuracy", unfortunately not for vessels which are too heavy. I´m afraid there is no way for your optimization when there are applicable design rules.

Michael
(When weight is such a big issue, what´s about Part 5 of Div. 2?)

Thanks a lot for response,

@Michael: in fact, calculation acc. Div. 2 seems to be the only way, but unfortunately our company has
no U2-stamp, that's the problem

Rainer

Rainer,

According to our experience, proof tests do not really help, the resulting thickness is usually thicker than according to the formulae.

I would check the Code cases for a solution, there is one allowing cold stretched vessels with increased stress values
Next idea, look for higher strength material,
Michaels idea is possible for you with an earlier Joint Review, before shipment of the vessels, and only when the user of the vessel agrees to U2 stamp.
Sometimes also the design streamlining can help. If your inspector has no idea, maybe talk to other consultants specialised in design questions: Michael would be a good address.

DK