ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
(OP)
I am designing an ASME VIII-1 heat exchanger fabricated from 904L materials, but there appears to be a disconnect in ASME with tubing materials.
One of the changes in the 2015 edition of the code was the reassignment of 904L steel from SB-designations to SA-designations. For example:
In 2013, welded tubing was listed in the codes as follows:
One of the changes in the 2015 edition of the code was the reassignment of 904L steel from SB-designations to SA-designations. For example:
- Fittings: SB-366 changed to SA-403
- Plate : SB-625 changed to SA-240
- Wld pipe: SB-673 changed to SA-312
In 2013, welded tubing was listed in the codes as follows:
- ASME VIII-1 (2013): Included in Table UNF-23.3 under SB-674
- ASME IID (2013): Allowable stress included for SB-674
- ASME VIII-1 (2015): Included in Table UNF-23.3 under SA-249, SB-674 removed
- ASME IID (2015): Allowable stress unchanged, only SB-674 included. No SA-249 listed.





RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
The SB-674-N08904 spec really shouldn't have been removed from ASME VIII-1 until it has been confirmed that SA-249-N08904 has been added to ASME IID.
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
In Table UHA-23, I believe that the SA-240 spec no. should be starting one line higher beside N08904.
As it currently reads, the code references an SA-217-N08904, which doesn't exist.
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
RE: ASME Oversight with reassignment of 904L (N08904) from SB-674 to SA-249?
An errata could be issued for either VIII-1 or IID though, I don't know which is easier. You could correct ASME IID changing SB-674 to SA-249, or you could change ASME VIII-1 to allow SB-674. I'm guessing that since VIII-1 wants to change over to SA-249, the best solution would be to issue an errata for IID.
The best solution though may depend on the feedback of a cat psychologist...