NF EN ISO 22435, E29-699 (04/2024)

This document specifies requirements for the design, type test methods, marking and instructions for cylinder valves with integral pressure regulators (VIPR) intended for mounting on gas cylinders, tubes or drums pressure or used as the main valve of cylinder frames transporting compressed, liquefied or dissolved gases. These are requirements for VIPRs in addition to those given in the relevant standard relating to closures, for example in ISO 10297 for cylinder valves, in ISO 17871 for opening cylinder valves fast, in ISO 17879 for cylinder valves equipped with self-sealing valves or in ISO 23826 for ball valves. For ISO 17871, these requirements are only applicable to quick-opening cylinder valves Types B, C, D and E. NOTE 1 If the pressure regulating system of a VIPR serves as the primary valve operating mechanism , it is covered by the relevant standard relating to closures, for example ISO 10297, ISO 17871, ISO 17879 and ISO 23826. This also includes designs in which the closure of the main valve operating mechanism of a VIPR is obtained by closing the seat of the pressure regulator system. NOTE 2 If the main valve operating mechanism of a VIPR is on the low pressure side of the pressure regulating system, it is covered by the relevant standard relating to closures, for example ISO 10297, ISO 17871, l ISO 17879 and ISO 23826. NOTE 3 The term "pressure receptacle" is used in this document to cover cases where no distinction is necessary between gas cylinders, cylinder frames, tubes and drums pressure. However, this document does not apply to VIPRs used for: a) medical applications (see ISO 10524-3); (b) liquefied petroleum gas (LPG); c) cryogenic applications. NOTE 4 Additional requirements for a VIPR with residual pressure device (RPD) are specified in ISO 15996. NOTE 5 Regional/international standards/regulations may impose additional requirements on safety valves.
(Automatic translation from French)