... 3.DIN,SMS,ISO,IDF,AS,BS,BPE Standard.Sanitary union (ISO9001:2000,CE,TUV certified) Specification: DN15-DN150 ... 180G,240G,400G)Shape: round or hexagon typeA completed union was composed of nut,liner,male,seal ring. ... valve,ball valve,check valve,diaphragm valve,safety valve,union parts,ferrule,end cap,nut,clamp,elbow,tee, ... welding machine and so on. Stainless steel sanitary union sanitary pipe fittings