NBN EN 1124-4 : 2013

Defines requirements, dimensions and tolerances for pipes and fittings of longitudinally welded, stainless steel pipe with spigot and socket used for vacuum drainage systems inside and outside buildings and for gravity and vacuum drainage systems on ships and floating maritime structures: - above freeboard deck as long as the heeling is taken into account in the event of damage when installed above freeboard deck on passenger ships; - inside a watertight compartment below freeboard deck; - with direct connection to the outboard (not permitted below freeboard deck); and - inside tanks as long as these are not filled with foreign media and are not cargo tanks.