ASME OR ASTM MATERIAL

[JVJV]

Concerning material for Power plant ASME B31-1
When is it necessary to specify SA106GrB for example instead of A106GrB
Is there any difference?
I'd appreciate anyone's comments on the matter
Other question
Is there a difference between ANSI and ASME for example ANSI B16-5 and ASME B16-5

 

[metengr]

JVJV;
I will answer your first question in two parts. Part 1 - For new boiler and pressure vessel construction, it is required to use material that has been endorsed by Section II of the ASME Boiler and Pressure Vessel Committee. I would refer you to Appendix A in Section II which lists substitution between A and SA material - A 106 can be used under the 1995 Edition of the ASTM specification. Otherwise, you must generate a Code case for particular usage of material, that is not listed in Section II or in Appendix A.

Part 2 - For B31.1 Power Piping, refer to paragraph D) of 123.1.2 -..Materials conforming to ASME SA or SB can be used interchangeably with material specified in ASTM A or B specifications of the same number.... with the exception of 123.2.2. In this section, if the piping falls under Boiler External the administrative rules of Section I apply - refer to Part 1 answer.

The ASTM committees have worked very closely with ASME B&PV committees over the years. All SA material originated from ASTM -A specifications. However, it is important to note that there can be technical or editorial variations that result in material having the SA designation versus the A designation from ASTM.

To answer your second question. ANSI is an accrediting organization, and I believe as publications are reviewed and approved by ANSI, they become ANSI publications, as well. Someone may add additional information.

 

[EdStainless]

There are often differences between A and SA that you need to watch for. First, the SAs are based on older A specs. A new alloy or mechanical condition may have been added by ASTM, but it may be years before that change is adopted by ASME.
Secondly the SAs sometimes require different testing or reporting.
If it is going into a Code application it should be procured to Code requirements.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[ctopher]

good responses above
maybe this may help a little

http://www.techstreet.com/STD.tmpl?tabName=STD

http://store.asme.org/

http://www.ansi.org/

 

[GenB]

If you use ASME mats you will more likely will not run into problems when reading and checking the MTR's, if your material is to ASTM, your report may lock of information required by the SA specification and you may not notice it until you have serious problems with the AI, ASME team leader, sometimes you may even have to scrap a vessel.

I believe the ASME CODE is an ANSI Standard so The ASME has combined is own ANSI-ASME thing similar to the ASTM A/SA
specifications.
You must own the required (for your operation)ANSI/ASME standards when available and the ASTM when not.
E.R.

 

[bvi]

The question was with respect to B31.1 piping, so this answer is limited to that.

You need to read the Code for specifics, but this is the general case.

For Boiler External Piping, ASME (e.g. SA) material is generally required, but ASTM (e.g. A) may be used under certain circumstances.

For Non-Boiler External Piping, ASTM material is generally used, but ASME material can generally also be used.

Note that per a recent change to B31.1, materials not listed in the Code may be used under specified conditions for Non-Boiler External Piping, without requiring a Code Case (e.g. committee approval is note required).