... ends, black painting, tied in bundle by steel strip for the convenience of long distance transportationDelivery Detail: ... 18-630mmThe Description of High Pressure Alloy Steel Pipe SpecificationsChina StandardSteel GradeStandardseamless steel tubesGB/T8162-199910, 20, 35, 45 ... SPEC 5LA, B, X42APIoil casing andtubing in oil wellsSeamles Steel TubesGB5310-199520G, 20MnG, 25MnG, 15MoG, 20MoG, 12Cr1MoVG, ...