DIN 2391 Cold drawn seamless steel tube,ST-52 Seamless Precision steel tubes

api 5ct octg coupling
API 5CT OCTG pipe Couplings, 4-20 inches,threaded end, R1,R2,R3
December 22, 2016
,X42,X60 erw pipe,lsaw pipe
API 5L line pipe , Seamless | SSAW | ERW | LSAW
December 23, 2016