1,api 5ct pipe/oilfield pipe/oil pipe/casing and tubing/api 5l line pipe 2,ISO9001-2008/ISO11960 3,.API 5CT-1043,API 5L-0699 We can supply tubing & casing ... (OD)Casing:4-1/2”,5”,5-1/2”,6-5/8”,7”,7-5/8”8-5/8”,9-5/8”,10 ... Carbon steel alloy steel As per agreementVessel pipe360,410,460,490,500,510GB/T5312Low-medium-pressure-boiler-pipe 10#,20#GB3087 api 5ct j55 seamless steel pipe