BS ISO 4126-9:2008
Current
The latest, up-to-date edition.
Safety devices for protection against excessive pressure Application and installation of safety devices excluding stand-alone bursting disc safety devices
Hardcopy , PDF
English
31-10-2008
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Risk consideration
5 Pressure limitation
5.1 General
5.2 Setting of safety devices
6 Inlet line
7 Outlet line
8 Installation
8.1 General
8.2 Installation of safety valves or the main valve of
a CSPRS or a POSV
8.3 Installation of safety valves and bursting disc safety
devices in series or parallel
8.4 Isolation of safety devices
9 Lifting device
Annex A (informative) - Safety device applications
Annex B (informative) - Sizing of multiple safety devices
Annex C (informative) - Sizing of inlet lines
Annex D (informative) - Calculation of built-up back pressure
Annex E (informative) - Calculation of reaction forces
Annex F (informative) - Calculation of noise level
Bibliography
Describes the application and installations of safety devices such as safety valves, safety valves and bursting disc safety devices in combination, pilot-operated safety valves and controlled safety pressure-relief systems for the protection of pressure equipment.
| Committee |
PSE/18/6
|
| DevelopmentNote |
Supersedes 05/30132083 DC. (10/2008)
|
| DocumentType |
Standard
|
| Pages |
42
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO4126 covers the application and installations of safety devices such as safety valves, safety valves and bursting disc safety devices in combination, pilot-operated safety valves and controlled safety pressure-relief systems for the protection of pressure equipment. ISO4126-6 covers the selection, application and installation of bursting disc safety devices.
This part of ISO4126 describes the normative requirements for applications and installations of safety devices to protect static pressure equipment. The information contained in this part of ISO4126 assumes single-phase flow of the fluid discharged from the safety device. ISO4126-10 provides guidance specific to two-phase flow conditions.
Equipment connected together in a system by piping of adequate capacity, which is free from potential blockages and does not contain any valve that can isolate any part, can be considered to be a safety system for the application of pressure relief.
This part of ISO4126 does not deal with other safety devices, such as safety related monitoring, control and regulation devices and other limiting devices allowed by some national regulations.
| Standards | Relationship |
| ISO 4126-9:2008 | Identical |
| ISO 4126-1:2013 | Safety devices for protection against excessive pressure — Part 1: Safety valves |
| ISO 4126-7:2013 | Safety devices for protection against excessive pressure — Part 7: Common data |
| ISO 4126-4:2013 | Safety devices for protection against excessive pressure — Part 4: Pilot operated safety valves |
| ISO/IEC Guide 51:2014 | Safety aspects — Guidelines for their inclusion in standards |
| ISO 4126-2:2003 | Safety devices for protection against excessive pressure Part 2: Bursting disc safety devices |
| AD 2000-MERKBLATT A2:2015 | SAFETY DEVICES AGAINST EXCESS PRESSURE - SAFETY VALVES |
| ISO 4126-5:2013 | Safety devices for protection against excessive pressure — Part 5: Controlled safety pressure relief systems (CSPRS) |
| ISO 4126-3:2006 | Safety devices for protection against excessive pressure Part 3: Safety valves and bursting disc safety devices in combination |
| TRD 421 : 1998 | SAFEGUARDS AGAINST EXCESSIVE PRESSURE - SAFETY VALVES - FOR STEAM BOILERS OF GROUPS 1, 3 AND 4 |
| ISO 4126-6:2014 | Safety devices for protection against excessive pressure — Part 6: Application, selection and installation of bursting disc safety devices |
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