U- Stamped Equipment - Machining of WNRF Flange to WNFF Flange
U- Stamped Equipment - Machining of WNRF Flange to WNFF Flange
(OP)
Hi,
One of our projects, the contractor machined the WNRF Flange of U-Stamped Static Mixer to Flat face to match with the connecting piping. The equipment is new and the design code is ASME Sec-VIII Div. 1. Is it acceptable to convert the flange face of U- stamped equipment without following R-stamp procedure? Your expert reply/ suggestions are highly appreciated.
Thanks in advance,
Regards,
Sajeev
One of our projects, the contractor machined the WNRF Flange of U-Stamped Static Mixer to Flat face to match with the connecting piping. The equipment is new and the design code is ASME Sec-VIII Div. 1. Is it acceptable to convert the flange face of U- stamped equipment without following R-stamp procedure? Your expert reply/ suggestions are highly appreciated.
Thanks in advance,
Regards,
Sajeev





RE: U- Stamped Equipment - Machining of WNRF Flange to WNFF Flange
Again, assuming B16.5, if this were done before hydro I'd see no need for an R stamp, afterwards I'd still say not, but it'd likely be up to the AI.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: U- Stamped Equipment - Machining of WNRF Flange to WNFF Flange
You haven't changed or repaired anything and it remains a compliant ASME B 16.5 flange so long as he doesn't remove too much of the flange material....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: U- Stamped Equipment - Machining of WNRF Flange to WNFF Flange
NB Interpretation 98-30 seems to back me up on this
Addresses damage during operation, but I've machined damaged flanges all the way down to FF (as allowed by B16.5). I don't see how converting it wouldn't fall under the same interpretation:
Nathan Brink