... steel, standard:ASME TH:SCH20-XXS api 5l x65 psl2 steel pipe for casing,oil casing and tubing in oil wells,High Pressure ... , 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