Difference between A and SA in materials callouts 3

[Spongerot]

We are a plastic-lined pipe and fittings manufacturer who supplies the CPI with process piping. Our applications does not require code (ASME Pressure Vessel) fabrication and stamp but occasionally, we will see a spec that calls out, for instance, SA-105 flanges and SA-53 Gr. B pipe or SA-106 Gr. B pipe. What is the difference between an A-105 callout and an SA-105 callout?

 

[lostsailor]

Spongerot,
The A designator is for ASTM materials, the SA for ASME materials.
Regards,
RLS

 

[jte]

To add a bit to lostsailor's correct reply, if you look at ASME II-A, Appendix A (at the front of the code), you'll find a listing of how the SA-xx materials differ from the A-xx materials. In the case of SA-53 SA-105, they are identical to A-53 and A-105. Your supplier should be able to provide dual stamped flanges or pipes.

In the case of SA-106, it is identical to A-106 "except for editorial differences in 8.1, 13.4, and 24.1 and deletion of ASTM caveat 1.5."

jt

 

[metengr]

To add to the above, when the ASME Boiler and Pressure Vessel Code was formed, a materials subcommittee was established to review other materials standards/specifications like ASTM and either adopt them in whole or in part, with exceptions or editorial revisions.

To assure identity, the ASME Code committee elected to use a prefix S to denote that the material specification was reviewed and approved for ASME Boiler and Pressure Vessel use. In some cases, material can meet both ASTM and ASME specifications. In other cases, ASTM materials are not acceptable for use in boiler or pressure vessel applications.