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

ISO 4126-3:2006 specifies 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 within no more than five pipe diameters from the valve inlet. It specifies the design, application and marking requirements for such products, which are used to protect pressure vessels, piping or other enclosures from excessive pressure, and which comprise the bursting disc safety device, a safety valve or CSPRS and, where applicable, a short length of 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

May 2006

Number of pages

22 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 - 05/05/2006

International kinship

ISO 4126-3:2006

European kinship

EN ISO 4126-3:2006

Sumary

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

Standard replaced by (1)

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

<p>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.</p>

Table of contents

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Avant-propos
iv
Introduction
v
1 Domaine d'application
1
2 Références normatives
1
3 Termes et définitions
2
4 Symboles
5
5 Conception de la combinaison
5
6 Installation de combinaison
5
7 Performance de la combinaison
6
8 Détermination du coefficient de débit de la combinaison, Fd, à l'aide d'essais
6
9 Obtention du coefficient de débit de la combinaison, Fd
10
10 Alternative aux essais pour Fd
10
11 Certification du coefficient de débit de la combinaison, Fd
10
12 Application et utilisation du coefficient de débit certifié de la combinaison, Fd
10
13 Marquage et identification des dispositifs combinés
11
14 Certification
11
15 Préparation pour le stockage et le transport
12

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