... :SCH20-XXS api 5l x65 psl2 steel pipe for casing,oil casing and tubing in oil wells,High Pressure Boiler, ... pipesfor casingSeamless steel tubes forAPE SPEC 5LA, B, X42APIoil casing andtubing in oil wellsSeamles Steel TubesGB5310-199520G, 20MnG, 25MnG, ... , Q390, 10MoVNb, 12CrMo, 15CrMo, 12Cr2MoISO 9329-2-1997 for high pressure --Chemical fertilizer equipmentASTM A161-94Seamless steel tubesGB9948-8610 ...