NBN ISO 9349:2021

This document specifies the requirements and test methods applicable to preinsulated ductile iron
pipes, fittings, accessories and their joints for the construction of pipelines (or parts thereof):
— to convey water (e.g. potable water), wastewater and other liquids;
— to be operated with or without pressure;
— to be installed below or above ground;
— to limit temperature variations of the conveyed fluids. These pipelines are mainly used to prevent
the water to be conveyed from freezing by providing external insulation.
NOTE 1 In this document, all pressures are relative pressures expressed in bars1)
.
This document gives, in addition to the specifications of the existing International Standards for the
conveying ductile iron pipes and fittings, specifications for materials, dimensions and tolerances,
mechanical and thermal properties of the thermal insulation layer and external casing of preinsulated
ductile iron pipes, fittings and accessories.
This document covers preinsulated ductile iron pipes, fittings and accessories of a size range extending
from DN 60 to DN 600 inclusive, which are as follows:
— manufactured with socketed, flanged or spigot ends for jointing by means of various types of gaskets
which are not within the scope of this document;
— preinsulated in the works (excluding on site application of the insulation layer and/or the casing);
— normally delivered internally and externally coated;
— intended for fluid temperatures from 0 °C to 50 °C, excluding frost.
NOTE 2 Other applications are possible by agreement between manufacturer and purchaser.