A335 GR P11 Alloy ANSI B16.25 steel Pipes Size: 1/2"- ... : API material: carbon SpecificationsChina StandardSteel GradeStandardseamless steel tubesGB/T8162-199910, 20, 35, 45, 40Mn2, 45Mn2, 27SiMn, 20Cr, 40Cr, 20CrMo, 35CrMo, 38CrMoA1 ... high pressure --Chemical fertilizer equipmentASTM A161-94Seamless steel tubesGB9948-8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988for petroleum cracking A335 ...