Cylindrical duplex shell tensile test

[ElCidCampeador]

Hi,
my client requires from a forging used as a shell for a pressure vessel (D.8" thk.30mm), with material superduplex, to do tensile test in all direction (x,y,z) because "ASME requires it", without any explanation. Why??? What par. of ASME prescribes this?

Construnction code ASME VIII DIV.1 + SA 182.

Thanks

 

[david339933]

I'm sure there are others with more experience in Super Duplex than myself, but reviewing SA-182, UF, UHA, I see nothing requiring this.

 

[EdStainless]

I understand x and y, but z?
I hope that the A923 requirements are in place also requiring -40 impact testing.
HT is the real place where these alloys get messed up.
And orientation of those does matter.

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P.E. Metallurgy, consulting work welcomed

 

[ElCidCampeador]

2 questions:

-Is A923 mandatory to check? Or simply "common practice"?
- In ASME VIII Div.1 I found UG-14 par.(b)(4) (it's my case, not (3) ) which requires 2 transverse tension test taken at 90° around the perimeter...is it applicable? This means that only transverse and longitudinal tensile test are required, right? According to A370 Fig.2 tangential test is required?

Thank you

 

[EdStainless]

A923 is a series of tests for determining the presence of detrimental secondary phases. These arise from incorrect heat treatment and hurt both mechanical properties and corrosion resistance.

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P.E. Metallurgy, consulting work welcomed