NF P16-325-1/A1*NF EN 1123-1/A1:2005 Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems - Part 1 : requirements, testing, quality control
2005NF P16-325-1/A1*NF EN 1123-1/A1:2005 Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems - Part 1 : requirements, testing, quality control