... :stainless steel, standard:ASME TH:SCH20-XXS api 5l x65 psl2 steel pipe for casing,oil casing and tubing in oil wells,High Pressure Boiler ... N80APIand pipesfor casingSeamless steel tubes forAPE SPEC 5LA, B, X42APIoil casing andtubing in oil wellsSeamles Steel TubesGB5310-199520G, 20MnG, 25MnG, 15MoG ... , 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988for petroleum cracking api 5l x65 psl2 steel pipe