Deviation from SA-213

[isoca]

A client has sent us an specification for tube manufacturing which indicate that the material shall be manufactured under ASME II SA-213 and and the additional requirements specified herein.
The SA-213 indicates for flaring test a minimum expansion of 30%, however, for this test, the client specification request 20%.
We asked the client if it was an error, and he answered no, and also request that our procedure should indicate 20%. (I know, it doesn't make any sense ..)
My question is, can a client request a deviation from ASME II and still request that the certificate include that the material was manufactured under that standard?
Many thanks

 

[EdStainless]

Did you go to the table in SA1016 and calculate the OD/ID ratio and then select for the correct material group?
And this uses the actual ID size, not nominal.
They range from 15% to 68%, and it is expansion of the ID that is measured.

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P.E. Metallurgy, consulting work welcomed

 

[isoca]

Yes, actual dimensions of these tube requires an expansion of 30% of the ID.
My query is, can the client request a deviation from the standard and at the same time request that the material certificate state that it was manufactured under SA-213?
Thank you very much for the reply

 

[EdStainless]

No, in ASTM and ASME if you do not meet all of the minimum requirements you cannot certify.
The only specs that I know of that have an exception mechanism is AMS.
Make a copy of the table and highlight your size and material and send it back, hold your ground.
I don't know why a client would want a less strict test. My guess is that for some job the value was 19% and they picked 20% min not realizing that it would likely be different for each job.


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P.E. Metallurgy, consulting work welcomed