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254 SMO piping material

254 SMO piping material

(OP)
What are the allowable stress at 95 degree centigrade and the yield stress

RE: 254 SMO piping material

What’s your design? Is this material listed in that code?

RE: 254 SMO piping material

And it depends on product form and specification.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: 254 SMO piping material

Joe Thomas,
254SMO is a SANDVIK product with UNS number UNS S31254. . Once you know the UNS number look up Table 1A stress table in ASME Sec II part D. Looks like this material was added in 2015 code version. Allowable stresses for this material are based on product form and thickness. So, you will need to have all details before looking up the table. Your answers are in this table.

Ganga D. Deka, P. Eng
Canada

RE: 254 SMO piping material

(OP)
I was looking for the allowable stress for pipe ASTM A312 UNS31254. I did not find in ASME 31.3 2002 edition.

RE: 254 SMO piping material

2002 is (too) far outdated. Have you checked the 2016 edt? I don’t have it at hand, so can’t check it for you.

RE: 254 SMO piping material

Joe Thomas,
What the product form and the thickness?

Ganga D. Deka, P. Eng
Canada

RE: 254 SMO piping material

Pipe A312 UNS No. S31254 exists in 2016 edition.
Please see in Table A-1 / A-1M at 20Cr–18Ni–6Mo
Please note that tensile values are not the same for thk. >3⁄16 and ≤3⁄16
Please consider Basic Quality Factor acc. to Table A-1B for the relevant pipe description.

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