平面（FF）对焊钢制管法兰

FF-Welded steel pipe flange

突面（RF）对焊钢制管法兰

RF-Welded steel pipe flange

凹凸面(MF)对焊钢制管法兰

MF-Welded steel pipe flange

榫槽面(TG)对焊钢制管法兰

TGWelded steel pipe flange

环连接面(RJ)对焊钢制管法兰

RJWelded steel pipe flange