API 5CT casing and tubing pipe 1)API 5CT, 5B standard 2)advanced test for quality 3)MTC,COC provided oil casing 1 ... .standard: API 5CT 2.Steel grade:J55,K55,N80,L80,p110 ... :seamless pipe 4.OD:114.30-508.00mmoil well casing1.standard: API 5CT2.Steel grade:J55,K55,N80,L80,p1103.technology ...