NF EN ISO 4126-3

NF EN ISO 4126-3

September 2020
Standard Current

Safety devices for protection against excessive pressure - Part 3 : safety valves and bursting disc safety devices in combination

This document specifies only the requirements for a product assembled from the in-series combination of safety valves or CSPRS (controlled safety pressure relief systems) according to ISO 4126‑1, ISO 4126‑4 and ISO 4126‑5, and bursting disc safety devices, according to ISO 4126‑2, installed upstream of the valve within five pipe diameters of the valve inlet. It specifies the design, application and marking requirements for such products, composed of the bursting disc safety device, a safety valve or CSPRS and, where applicable, a connecting pipe or spool piece. In addition, it gives a method for establishing the combination discharge factor used in sizing combinations.

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Main informations

Collections

National standards and national normative documents

Thematics

Sécurité, Gestion des risques et SST, QSE

Publication date

September 2020

Number of pages

21 p.

Reference

NF EN ISO 4126-3

ICS Codes

13.240   Protection against excessive pressure
23.060.40   Pressure regulators

Classification index

E29-417-3

Print number

1

International kinship

ISO 4126-3:2020

European kinship

EN ISO 4126-3:2020
Sumary
Safety devices for protection against excessive pressure - Part 3 : safety valves and bursting disc safety devices in combination

This document specifies only the requirements for a product assembled from the in-series combination of safety valves or CSPRS (controlled safety pressure relief systems) according to ISO 4126‑1, ISO 4126‑4 and ISO 4126‑5, and bursting disc safety devices, according to ISO 4126‑2, installed upstream of the valve within five pipe diameters of the valve inlet. It specifies the design, application and marking requirements for such products, composed of the bursting disc safety device, a safety valve or CSPRS and, where applicable, a connecting pipe or spool piece. In addition, it gives a method for establishing the combination discharge factor used in sizing combinations.

Replaced standards (1)
NF EN ISO 4126-3
May 2006
Standard Cancelled
Safety devices for protection against excessive pressure - Part 3 : safety valves and bursting disc safety devices in combination

Le présent document définit les spécifications applicables aux combinaisons en série de dispositifs de sécurité tels que des soupapes de sûreté, soupapes de sûreté pilotées et dispositifs de sécurité à décharge contrôlés contre les surpressions (DSDCS) et des dispositifs de sûreté à disque de rupture. Ces spécifications portent notamment sur la fabrication, le contrôle, les essais, le marquage, la certification et le conditionnement de ces dispositifs. Ce document constitue la troisième partie d'un ensemble de sept normes relatives aux dispositifs de sécurité contre les pression excessives, publiées sous le même indice E 29-417, la partie 7 traitant de données communes. Il est destiné à venir en appui aux exigences essentielles de la Directive Équipements sous Pression 97/23/CE.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles
  • 5 Conception de la combinaison
  • 6 Installation de la combinaison
  • 7 Performance de la combinaison
  • 8 Détermination du coefficient de débit de la combinaison, F d, à l'aide d'essais
  • 9 Obtention du coefficient de débit de la combinaison, F d
  • 10 Alternative aux essais pour F d
  • 11 Certification du coefficient de débit de la combinaison, F d
  • 12 Application et utilisation du coefficient de débit certifié de la combinaison, F d
  • 13 Marquage et identification des dispositifs combinés
  • 14 Documentation
  • 15 Préparation pour le stockage et le transport
  • Annexe A (informative) Relation entre la présente Norme européenne et les Exigences Essentielles concernées de la Directive UE 2014/68/UE (DESP)
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