阀门法兰连接突面- raised face 略写(RF)
阀门法兰全平面- flat face; full face略写 (FF)
阀门法兰凹面 -female face 略写(FMF);阀门法兰凸面- male face略写 (MF);阀门凹凸面-略写(MFM)
阀门法兰榫槽面-略写(TG)
阀门环垫接头 -略写ring joint (RJ)
阀门对焊连接 -butt welded 略写(BW)
阀门承插焊 -socket welded略写 (SW)
美国标准阀门锥管螺纹- American standard taper pipe thread略写 (NPT)