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BS EN ISO 4126-4:2013

Current

Current

The latest, up-to-date edition.

Safety devices for protection against excessive pressure Pilot-operated safety valves

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-07-2013

$443.41
Including GST where applicable

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Design
6 Production testing
7 Type testing
8 Determination of pilot operated safety valve performance
9 Sizing of pilot operated safety valves
10 Marking and sealing
Bibliography
Annex ZA (informative) - Relationship between this International
         Standard and the Essential Requirements of EU Directive
         97/23/EC (PED)

Defines general requirements for pilot operated safety valves, irrespective of the fluid for which they are designed.

Committee
PSE/18/6
DevelopmentNote
Supersedes 99/704033 DC. (04/2004) Supersedes 09/30197346 DC. (07/2013)
DocumentType
Standard
Pages
26
PublisherName
British Standards Institution
Status
Current
Supersedes

This part of ISO4126 specifies general requirements for pilot operated safety valves, 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.

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

This is a product standard and it is not applicable to applications of pilot operated safety valves.

BS 1123:2006 Fusible plugs for steam boilers and compressed air applications. Specification
BS PD5500(2006) : 2006 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS

ISO 4126-7:2013 Safety devices for protection against excessive pressure — Part 7: Common data
ISO 6708:1995 Pipework components Definition and selection of DN (nominal size)
ASME B16.34 : 2017 VALVES - FLANGED, THREADED, AND WELDING END
API 527 : 2014 SEAT TIGHTNESS OF PRESSURE RELIEF VALVES
1997/23/EC : 1997 DIRECTIVE 97/23/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 29 MAY 1997 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING PRESSURE EQUIPMENT

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