... Wall Thickness:4.24--38.84 Length:R1 R2 R3 API 5CT OCTG Seamless Steel Oil well Casing Pipe 1.products ... 12M , according to customers' requirements Certificate API,SGS StandardBS1387/1985,ASTM A53/A36,API5CT,API 5L MaterialAPI 5CT J55/K55/L80/N80 ... Processing technology available:galvanzied,inner and outer stab clean,bevelled,threading,with coupling and plastic caps protected,packing in plastic cloths ...