ISO/NP TS 6671

Thermal preinsulated ductile iron pipes, fittings, accessories and their joints for heat supply

Scope

This document specifies the requirements and test methods applicable to Thermal preinsulated ductile iron pipes, fittings, accessories and their joints for the construction of pipelines :
— to convey hot water up to 130℃;
— to be operated with pressure up to 25Bar;
— to be installed below or above ground;
— to limit temperature variations of the conveyed fluids.
This document specifies materials, dimensions and tolerances, mechanical properties, standard coatings, thermal properties of the thermal insulation layer and external casing of preinsulated ductile iron pipes, fittings and accessories. It also gives performance requirements for all components including joints and gaskets.
This document covers preinsulated ductile iron pipes, fittings and accessories of a size range extending from DN 100 to DN 1600 inclusive, which are
— manufactured with socket, flanged or spigot ends,
— preinsulated in the works, and
— normally delivered internally and externally coated.