钢制管法兰 PN ; Class ; steel pipe flanges

整体钢制管法兰 Integral steel pipe flanges

钢制法兰管件 Steel flanged fittings

钢制管法兰盖 Steel pipe blank flanges

对焊钢制管法兰 Steel pipe welding neck flanges

板式平焊钢制管法兰 Slip-on-welding plate steel pipe flanges

带颈对焊钢制管法兰 Steel pipe welding neck flange

带颈螺纹钢制管法兰 Hubbed screwed steel pipe flanges

钢制法兰 Carbon steel flange

大直径钢制管法兰 Large diameter steel pipe flanges