标 准 编 号: BS 1640-4-1968 简体中文标题:石油工业用钢质对焊管配件规范.第4部分:锻制和铸制奥氏体铬镍钢配件:米制件 繁体中文标题:石油工业用钢质对焊管配件规范.第4部分:锻制和铸制奥氏体铬镍钢配件:米制件 English Name: Specification for steel butt-welding pipe fittings for the petroleum industry - Wrought and cast austenitic chromium-nickel steel fittings - Metric units