钢: sharpen; strop; whet制管: tubulation法兰: flange和: mix; blend附件: appendix; annex标准: standard; criterion; benchma ...钢制管法兰: specification for steel pipe flanges; types and parameters for steel pipe flanges钢制管法兰类型: types for steel pipe flanges gb/t 1-pn6mpa(16bar)平面钢制管法兰盖: steel pipe blank flanges with flat face for pn 6mpa凸面钢制管法兰盖: steel pipe blank flanges with raised face for pn 0mpa突面钢制管法兰盖: steel pipe blank flanges with flat face or raised face凹凸面对焊钢制管法兰: steel pipe welding neck flanges with male and female face for pn 0mpa; steel pipe welding neck flanges with male and female face for pn 5mpa; steel pipe welding neck flanges with male and female face for pn mpa凹凸面钢制管法兰盖: steel pipe blank flanges with male and female face for pn 0mpa凹凸面整体钢制管法兰: integral steel pipe flanges with male and female face for pn 0mpa; integral steel pipe flanges with male and female face for pn 5mpa; integral steel pipe flanges with male and female face for pn 6mpa; integral steel pipe flanges with male and female face for pn mpa板式翻边松套钢制管法兰: loose plate steel pipe flanges with lapped pipe end for pn 0mpa钢制管法兰对焊端部: butt-welding ends for steel pipe flanges钢制管法兰技术条件: specification for steel pipe flanges钢制管法兰压力温度等级: pressure-temperature ratings for steel pipe flanges环连接面对焊钢制管法兰: steel pipe welding neck flanges with ring-joint face for pn 0mpa环连接面钢制管法兰盖: steel pipe blank flanges with ring-joint face for pn 0mpa环连接面整体钢制管法兰: integral steel pipe flanges with ring-joint face for pn 0mpa平面、突面对焊钢制管法兰: steel pipe welding neck flanges with flat face or raised face平面板式平焊钢制管法兰: slip-on welding plate steel pipe flanges with flat face for pn 6mpa平面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with flat face for pn 0mpa平面对焊钢制管法兰: steel pipe welding neck flanges with flat face for pn 25mpa; steel pipe welding neck flanges with flat face for pn 6mpa; steel pipe welding neck flanges with flat face for pn0mpa; steel pipe welding neck flanges with flat face for pn6mpa