ISO 4126-1:2013
Safety devices for protection against excessive pressure — Part 1: Safety valves
ISO 4126-1:2013 specifies general requirements for safety valves irrespective of the fluid for which they are designed.
It is applicable to safety valves having a flow diameter of 4 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature.
ISO 4126-1:2013 is a product standard and is not applicable to applications of safety valves.
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Section sec_1
Section sec_2
Section sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
Section sec_3.6
Section sec_3.7
Section sec_3.8
Section sec_3.9
Section sec_3.10
Section sec_3.11
Section sec_3.12
Section sec_3.13
Section sec_3.14
Section sec_3.15
Section sec_3.16
Section sec_3.17
Section sec_3.18
Section sec_3.19
Section sec_3.20
Section sec_3.21
Section sec_3.22
Section sec_4
Table tab_1
Section sec_5
Section sec_5.1
Section sec_5.1.1
Section sec_5.1.2
Section sec_5.1.3
Section sec_5.1.4
Section sec_5.1.5
Section sec_5.1.6
Section sec_5.1.7
Section sec_5.1.8
Section sec_5.1.9
Section sec_5.1.10
Section sec_5.1.11
Section sec_5.1.12
Section sec_5.2
Table tab_a
Figure fig_1
Section sec_5.3
Section sec_5.4
Section sec_6
Section sec_6.1
Section sec_6.2
Section sec_6.3
Section sec_6.3.1
Section sec_6.3.2
Table tab_2
Section sec_6.3.3
Section sec_6.3.4
Section sec_6.4
Section sec_6.4.1
Section sec_6.4.2
Section sec_6.5
Section sec_6.6
Section sec_7
Section sec_7.1
Section sec_7.1.1
Section sec_7.1.2
Section sec_7.1.3
Section sec_7.1.4
Section sec_7.1.5
Section sec_7.1.6
Section sec_7.2
Section sec_7.2.1
Section sec_7.2.2
Section sec_7.2.3
Section sec_7.2.4
Section sec_7.3
Section sec_7.3.1
Section sec_7.3.2
Section sec_7.3.3
Section sec_7.3.3.1
Section sec_7.3.3.2
Section sec_7.3.3.3
Section sec_7.3.3.4
Section sec_7.3.3.5
Section sec_7.3.4
Section sec_7.3.5
Section sec_7.3.6
Section sec_7.4
Section sec_8
Section sec_9
Section sec_10
Section sec_10.1
Section sec_10.1.1
Section sec_10.1.2
Section sec_10.2
Reference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Reference ref_5
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Design
5.1 General
5.2 Valve end connections
5.3 Minimum requirements for springs
5.4 Materials
6 Production testing
6.1 Purpose
6.2 General
6.3 Hydrostatic testing
6.4 Pneumatic testing
6.5 Adjustment of set or cold differential test pressure
6.6 Seat leakage test
7 Type testing
7.1 General
7.2 Tests to determine operating characteristics
7.3 Tests to determine flow characteristics
7.4 Determination of the coefficient of discharge
7.5 Certification of coefficient of discharge
8 Determination of safety valve performance
9 Sizing of safety valves
10 Marking and sealing
10.1 Marking
10.2 Sealing of a safety valve
Bibliography
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Section sec_1
Section sec_2
Section sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
Section sec_3.6
Section sec_3.7
Section sec_3.8
Section sec_3.9
Section sec_3.10
Section sec_3.11
Section sec_3.12
Section sec_3.13
Section sec_3.14
Section sec_3.15
Section sec_3.16
Section sec_3.17
Section sec_3.18
Section sec_3.19
Section sec_3.20
Section sec_3.21
Section sec_3.22
Section sec_4
Table tab_1
Section sec_5
Section sec_5.1
Section sec_5.1.1
Section sec_5.1.2
Section sec_5.1.3
Section sec_5.1.4
Section sec_5.1.5
Section sec_5.1.6
Section sec_5.1.7
Section sec_5.1.8
Section sec_5.1.9
Section sec_5.1.10
Section sec_5.1.11
Section sec_5.1.12
Section sec_5.2
Table tab_a
Figure fig_1
Section sec_5.3
Section sec_5.4
Section sec_6
Section sec_6.1
Section sec_6.2
Section sec_6.3
Section sec_6.3.1
Section sec_6.3.2
Table tab_2
Section sec_6.3.3
Section sec_6.3.4
Section sec_6.4
Section sec_6.4.1
Section sec_6.4.2
Section sec_6.5
Section sec_6.6
Section sec_7
Section sec_7.1
Section sec_7.1.1
Section sec_7.1.2
Section sec_7.1.3
Section sec_7.1.4
Section sec_7.1.5
Section sec_7.1.6
Section sec_7.2
Section sec_7.2.1
Section sec_7.2.2
Section sec_7.2.3
Section sec_7.2.4
Section sec_7.3
Section sec_7.3.1
Section sec_7.3.2
Section sec_7.3.3
Section sec_7.3.3.1
Section sec_7.3.3.2
Section sec_7.3.3.3
Section sec_7.3.3.4
Section sec_7.3.3.5
Section sec_7.3.4
Section sec_7.3.5
Section sec_7.3.6
Section sec_7.4
Section sec_8
Section sec_9
Section sec_10
Section sec_10.1
Section sec_10.1.1
Section sec_10.1.2
Section sec_10.2
Reference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Reference ref_5
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Design
5.1 General
5.2 Valve end connections
5.3 Minimum requirements for springs
5.4 Materials
6 Production testing
6.1 Purpose
6.2 General
6.3 Hydrostatic testing
6.4 Pneumatic testing
6.5 Adjustment of set or cold differential test pressure
6.6 Seat leakage test
7 Type testing
7.1 General
7.2 Tests to determine operating characteristics
7.3 Tests to determine flow characteristics
7.4 Determination of the coefficient of discharge
7.5 Certification of coefficient of discharge
8 Determination of safety valve performance
9 Sizing of safety valves
10 Marking and sealing
10.1 Marking
10.2 Sealing of a safety valve
Bibliography