Fluidsystem och delar: allmänt

This part of ISO 21028 specifies the toughness requirements of metallic materials for use at a temperature below -80 °C to ensure their suitability for cryogenic vessels. This part of ISO 21028 is not applicable to unalloyed steels and cast materials.

This document defines terms for gas cylinders and other pressure receptacles, their fittings and requirements relating to their manufacture and use.

This document specifies the technical delivery conditions for welded tubes, of square and rectangular cross section, made from stainless steels, for mechanical and general engineering purposes. This document does not apply to welded stainless steel hollow sections intended to be used in metal structures, composite metal structures and concrete structures in the construction sector covered by Regulation (EU) 305/2011.

This document specifies the characteristics and the requirements of air gap with injector Family A, Type D for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for protection of potable water in water installations from pollution by backflow. This document applies to air gaps in factory-assembled products and to constructed air gaps in situ and defines requirements and methods to verify and ensure compliance with this document during normal working use. The fluid in the receiving vessel is assumed to have similar properties to the water supply. Where this is not the case, additional care or tests may be required to verify the efficacy of the solution in practical use. The AD device is intended to be used in potable water installations according to EN 806 (all parts).