... pipe fitting1.Delivery of goods : metric thread ; no special requirements are delivery of goods in standard sizes2. Kind: male flange connection ... , loose flange connection, 90°graphite elbow coupling, graphite tee coupling, ... graphite tube end closure , graphite plug valve 3.Standard pipe size :Dg25,Dg36,Dg50,Dg65,Dg75,Dg102,Dg127,Dg152We ...