Appendix 2 vs custom forging
Appendix 2 vs custom forging
(OP)
If a rough forging is purchased for a LWN type flange on a PV is it to be designed to App 2 or can it be calculated as a custom forging with standard dimensions. Example. For a 18" Type F flange.





RE: Appendix 2 vs custom forging
If any of the dimensions are different beyond the tolerances outlined in B16.5, you will need to perform the Appendix 2 calculation.
RE: Appendix 2 vs custom forging
Anything else going to be a special design. Be aware the B16.5 flange patterns may not survive an Appendix 2 calculation.
Manufacturers such as FVC list their products as per B15.5 pressure classes, and as a practical matter I suppose a copy could be expected to have the same rating.
Regards,
Mike
RE: Appendix 2 vs custom forging
Thanks for the input.
RE: Appendix 2 vs custom forging
if your LWN is CS/Low alloy steel please also refer clause UCS-66(c)(4).
Dhaval