1.application:graphite pipe coupling 2.material:impermeable graphite 3.specification: Dg22-Dg152 Graphite pipe fitting1.Delivery of goods : metric thread ... connection, loose flange connection, 90°graphite elbow coupling, graphite tee coupling, graphite stone, graphite outer tube fittings, graphite ... tube end closure , graphite plug valve 3.Standard pipe size :Dg25,Dg36,Dg50,Dg65,Dg75,Dg102,Dg127, ...