+91 80984 42953 hello@sascert.in
Verify a certificate ISO standards library Download brochure
ISO 4126-4:2004Withdrawn

Safety devices for protection against excessive pressure — Part 4: Pilot-operated safety valves

Dispositifs de sécurité pour protection contre les pressions excessives — Partie 4: Soupapes de sûreté pilotées

This edition has been replaced by ISO 4126-4:2013.

Abstract / scope

ISO 4126-4:2003 specifies general requirements for pilot operated safety valves, other than those covered in ISO 4126-1, irrespective of the fluid for which they are designed. In all cases, the operation is carried out by the fluid in the system to be protected.

ISO 4126-4:2003 is applicable to pilot operated safety valves having a valve flow diameter of 6 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature.

This is a product standard and it is not concerned with applications for pilot operated safety valves.

Life cycle

Amendments & corrigenda

ISO 4126-4:2004/Cor 1:2007WithdrawnSafety devices for protection against excessive pressure — Part 4: Pilot-operated safety valves — Technical Corrigendum 1International Standard · Published 2 Aug 2007 · ISO/TC 185

Replaces

ISO 6718:1991WithdrawnBursting discs and bursting disc devicesInternational Standard · Published 5 Dec 1991 · ISO/TC 185ISO 6718:1991/Cor 1:1993WithdrawnBursting discs and bursting disc devices — Technical Corrigendum 1International Standard · Published 30 Sep 1993 · ISO/TC 185

Replaced by

ISO 4126-4:2013PublishedSafety devices for protection against excessive pressure — Part 4: Pilot operated safety valvesInternational Standard · Published 12 Jul 2013 · ISO/TC 185