突面(RF)对焊环板式松套钢制管法兰

RF-Welding ring plate loose flange

凹凸面(MF)对焊环板式松套钢制管法兰

MF-Welding ring plate loose flange

榫槽面(TG)对焊环板式松套钢制管法兰

TG-Welding ring plate loose flange