Imperfection and scratch of face of flange

[jtseng123]

Dear All,

We have vessel shipped to jobsite and found pitting on the face of flange.
I looked at ASME PCC-1, Table D-2, but it only talks about acceptable imperfection for "soft-faced gasket", which is not applicable to "soft gasket" such as spiral-wound that we are using. The pitting is about 0.008" deep in gasket seating area, and 0.011" in non-gasket seating area.

Does any one know where I can find an acceptable imperfection criteria for spiral-wound gasket seating surface? or is it mandatory to re-face ?

Thanks for you immediate help.

 

[racookpe1978]

Your link (downloaded picture ?) was entered as seven different individual words. Please try again.

 

[SnTMan]

jtseng123, if you can get a copy of TEMA, Fig. F-4 may give you some guidance,

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[jtseng123]

I attach the photos. You will see how bad it is.

 

[BJI]

You are correct in using PCC-1. A spiral wound gasket is a soft faced gasket (graphite filler), as opposed to metal faced gaskets (hard faced). The definition of hard and soft faced gaskets are included in Appendix B-2.