BS EN 1123-3:2004
污水系统用带插接套的纵向焊接热浸镀锌钢管及配件.真空排水系统以及造船用排水系统的尺寸和特殊要求
Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems - Dimensions and special requirements for vacuum drainage systems and for drainage systems in ship-building