突面(RF)平焊环板式松套钢制管法兰

RF-Flat welded ring plate loose flange

凹凸面(MF)平焊环板式松套钢制管法兰

MF-Flat welded ring plate loose flange

榫槽面(TG)平焊环板式松套钢制管法兰

TGFlat welded ring plate loose flange