... tee coupling,graphite stone, graphite outer tube fittings, graphite inner tube fittings, graphite plug , graphite wire buri, graphite ... tube end closure , graphite plug valve . 3. Standard pipe size ... :Dg25,Dg36,Dg50,Dg65,Dg75,Dg102,Dg127,Dg152We can manufacture product according to the drawing you provide graphite pipe fittings for ...