标 准 编 号： BS 1640-3-1968 简体中文标题：石油工业用钢质对接焊管配件规范.锻制碳钢与铁素体合金钢配件:米制件 繁体中文标题：石油工业用钢质对接焊管配件规范.锻制碳钢与铁素体合金钢配件:米制件 English Name：Specification for steel butt-welding pipe fittings for the petroleum industry - Wrought carbon and ferritic alloy steel fittings - Metric units
