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BS 6759-2:1984

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Safety valves Specification for safety valves for compressed air or inert gases

Available format(s)

Hardcopy , PDF

Superseded date

18-05-2004

Language(s)

English

Published date

31-08-1984

$443.41
Including GST where applicable

Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
Section two. Material requirements and limitations
3. Pressure containing components
Section three. Design and construction
4. General
5. Helical compression springs
Section four. Production testing and inspection
6. General
7. Pressure tests
8. Repair of defects in forgings and castings
Section five. Marking and preparation for despatch
9. Marking
10. Preparation for despatch
Section six. Performance testing
11. Type testing of safety valves for operating and
     flow characteristics using air or other gas of
     known characteristics
12. Tests to determine operating characteristics
13. Test to determine flow characteristics
14. Determination of coefficient of discharge and
     certified discharge capacity
15. Equivalent capacity
Appendices
A. Derivation of equation (11) for the certified
     capacity of a safety valve for air
B. Derivation of compressibility factor Z
Tables
1. Spring materials and characteristics
2. Value of the stress correction factor for
     curvature (K)
3. Load/length tolerances
4. Minimum duration of pressure test
5. Values of C relative to values of k
6. Capacity correction factors for back pressure (Kb)
Figures
1. Illustration of area definitions
2. Illustration of an end coil
3. Spring plate
4. Compressibility factor Z as a function of reduced
     pressure pr and reduced temperature Tr

Requirements for the design, inspection, testing and flow certification of safety valves for air receivers and compressed air or inert gases.

Committee
PSE/18/6
DevelopmentNote
REPLACES BS 1123: PART 2: 1976
DocumentType
Standard
Pages
26
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

PD 5500:2000 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS 5169:1992 Specification for fusion welded steel air receivers
BS 6759-3:1984 Safety valves Specification for safety valves for process fluids
BS 5500:1991 Specification for unfired fusion welded pressure vessels
BS 1123-1:1987 Safety valves, gauges and fusible plugs for compressed air or inert gas installations Code of practice for installation
BS 6739:1986 Code of practice for instrumentation in process control systems: installation design and practice

BS 1560-2:1970 Circular flanges for pipes, valves and fittings (Class designated) Specification for steel pipe flanges (nominal sizes ½ in to 24 in). Metric dimensions
BS 1726-1:1987 Coil springs. Guide for the design of helical compression springs
BS 4504-2:1974 Circular flanges for pipes, valves and fittings (PN designated) Copper alloy and composite flanges
BS 4504-1:1969 Circular flanges for pipes, valves and fittings (PN designated) Ferrous

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