... : 1/2"-96" inspection: X-Ray test Certificate: API material: carbon steel SpecificationsChina StandardSteel GradeStandardseamless steel tubesGB/T8162-199910 ... steel tubes forAPE SPEC 5LA, B, X42APIoil casing andtubing in oil wellsSeamles Steel TubesGB5310-199520G, 20MnG, 25MnG, 15MoG, 20MoG, 12Cr1MoVG ... 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988for petroleum cracking API 5L Steel pipe and tubing