pipe joint :We are setting up a mill for production of tubing and casing couplings. 2 3/8"-20" pipe joint pipe coupling,fitting,pipe fitting,steel pipe fittings,carbon steel pipe fitting,tubing and casing couplingSize range from 2 3/8"to 20"Steel grade including:K55,J55,L80,N80,C90,T95andP110Thread types:NU,EU,STC,LTCand BTCQuality is fully guaranteed. pipe joint