... API 5L Steel pipe and tubing Size: 1/2"-96" inspection: X-Ray test Certificate: API material: carbon steel SpecificationsChina StandardSteel GradeStandardseamless steel ... 5LA, B, X42APIoil casing andtubing in oil wellsSeamles Steel TubesGB5310-199520G, 20MnG, 25MnG, 15MoG, 20MoG, ... steel tubesGB9948-8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988for petroleum cracking API 5L Steel pipe ...