ISO 4126-7:2013
Safety devices for protection against excessive pressure — Part 7: Common data
ISO 4126-7:2013 specifies requirements for safety valves. It contains information which is common to ISO 4126-1 to ISO 4126-6 to avoid unnecessary repetition.
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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_4
Table tab_1
Section sec_5
Section sec_5.1
Section sec_5.2
Section sec_5.3
Section sec_5.3.1
Section sec_5.3.2
Section sec_5.4
Section sec_5.5
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
Section sec_6.3.3
Section sec_6.3.3.1
Section sec_6.3.3.2
Section sec_6.3.4
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.3
Section sec_7.4
Table tab_a
Figure fig_1
Section sec_7.5
Section sec_7.5.1
Section sec_7.5.2
Section sec_7.5.3
Table tab_b
Figure fig_2
Section sec_7.6
Table tab_5
Section sec_8
Section sec_8.1
Section sec_8.2
Section sec_8.3
Section sec_8.4
Section sec_8.4.1
Section sec_8.4.2
Section sec_8.4.3
Section sec_8.4.4
Section sec_8.5
Section sec_8.6
Section sec_8.6.1
Section sec_8.6.2
Table tab_c
Figure fig_3
Section sec_8.6.3
Section sec_9
Section sec_9.1
Section sec_9.2
Section sec_9.3
Section sec_9.4
Section sec_9.4.1
Section sec_9.4.2
Section sec_9.5
Section sec_9.5.1
Section sec_9.5.2
Annex sec_A
Annex sec_A.1
Annex sec_A.2
Annex sec_A.3
Reference ref_1
Reference ref_2
Table tab_2
Table tab_2___1
Table tab_2___2
Table tab_2___3
Table tab_2___4
Table tab_3
Table tab_4
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Determination of safety valve performance
5.1 Determination of coefficient of discharge
5.2 Critical and subcritical flow
5.3 Discharge capacity at critical flow
5.4 Discharge capacity for any gas at subcritical flow
5.5 Discharge capacity for non-flashing liquid as the test medium in the turbulent zone where the Reynolds number Re is equal to or greater than 80 000
6 Sizing of safety valves
6.1 General
6.2 Valves for gas or vapour relief
6.3 Calculation of capacity
7 Thermodynamic properties
7.1 Steam data
7.2 Value of C as a function of k
7.3 Theoretical capacity correction factors for sub-critical flow (Kb)
7.4 Estimating chart for compressibility factor, Z
7.5 Capacity correction factor for viscosity, Kv
7.6 Properties of gases
8 Minimum requirements for helical compression springs
8.1 General
8.2 Materials
8.3 Marking
8.4 Dimensions
8.5 Spring plates/buttons
8.6 Inspection, testing and tolerances
9 Minimum requirements for safety valve disc springs
9.1 General
9.2 Materials
9.3 Marking
9.4 Dimensions
9.5 Inspection, testing and tolerances
Annex A (informative) Examples of capacity calculations for various media
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_4
Table tab_1
Section sec_5
Section sec_5.1
Section sec_5.2
Section sec_5.3
Section sec_5.3.1
Section sec_5.3.2
Section sec_5.4
Section sec_5.5
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
Section sec_6.3.3
Section sec_6.3.3.1
Section sec_6.3.3.2
Section sec_6.3.4
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.3
Section sec_7.4
Table tab_a
Figure fig_1
Section sec_7.5
Section sec_7.5.1
Section sec_7.5.2
Section sec_7.5.3
Table tab_b
Figure fig_2
Section sec_7.6
Table tab_5
Section sec_8
Section sec_8.1
Section sec_8.2
Section sec_8.3
Section sec_8.4
Section sec_8.4.1
Section sec_8.4.2
Section sec_8.4.3
Section sec_8.4.4
Section sec_8.5
Section sec_8.6
Section sec_8.6.1
Section sec_8.6.2
Table tab_c
Figure fig_3
Section sec_8.6.3
Section sec_9
Section sec_9.1
Section sec_9.2
Section sec_9.3
Section sec_9.4
Section sec_9.4.1
Section sec_9.4.2
Section sec_9.5
Section sec_9.5.1
Section sec_9.5.2
Annex sec_A
Annex sec_A.1
Annex sec_A.2
Annex sec_A.3
Reference ref_1
Reference ref_2
Table tab_2
Table tab_2___1
Table tab_2___2
Table tab_2___3
Table tab_2___4
Table tab_3
Table tab_4
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Determination of safety valve performance
5.1 Determination of coefficient of discharge
5.2 Critical and subcritical flow
5.3 Discharge capacity at critical flow
5.4 Discharge capacity for any gas at subcritical flow
5.5 Discharge capacity for non-flashing liquid as the test medium in the turbulent zone where the Reynolds number Re is equal to or greater than 80 000
6 Sizing of safety valves
6.1 General
6.2 Valves for gas or vapour relief
6.3 Calculation of capacity
7 Thermodynamic properties
7.1 Steam data
7.2 Value of C as a function of k
7.3 Theoretical capacity correction factors for sub-critical flow (Kb)
7.4 Estimating chart for compressibility factor, Z
7.5 Capacity correction factor for viscosity, Kv
7.6 Properties of gases
8 Minimum requirements for helical compression springs
8.1 General
8.2 Materials
8.3 Marking
8.4 Dimensions
8.5 Spring plates/buttons
8.6 Inspection, testing and tolerances
9 Minimum requirements for safety valve disc springs
9.1 General
9.2 Materials
9.3 Marking
9.4 Dimensions
9.5 Inspection, testing and tolerances
Annex A (informative) Examples of capacity calculations for various media
Bibliography