API 5CT OCTG pipe Couplings, 4-20 inches,threaded end, R1,R2,R3

API 5CT tubing Specifications , J55 / L80 / N80 / C90 / P110
December 21, 2016
din2391st52 seamless pipe
DIN 2391 Cold drawn seamless steel tube,ST-52 Seamless Precision steel tubes
December 23, 2016