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BS 6759-1-1984 safety valves. specification for safety valves for steam and hot water

Standard Number:  BS 6759-1-1984
Title:  safety valves. specification for safety valves for steam and hot water
Language:  English
Replaced by Standard:  BS EN ISO 4126-1:2004

Replacing Standard:  BS 759-2:1975

Publication Date:  1984/2/29
Execute Date:  1984/2/29
Adopted International Standard:  ISO 4126 Not Equivalent ISO 4126-1981 Similar
Status:  Withdrawn
CCS Classification for Standardsmechanical>>Gm parts>>The valve
Publisher:  British Standards
Price:  
Number of Pages:24P.;A4  

Description:Specifies requirements for safety valves for boiler installations and associated pipework where the steam pressure exceeds 1 bar gauge or, in the case of hot water boilers , where the rating is 44 kW and above.  
Catalog:Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
Section two. Material requirements and limitations
3. Pressure containing components
4. Body seat faces and valve disk faces
5. Safety valve springs
6. Bolting for pressure containing joints
Section three. Design and construction
7. General
8. Scantlings
9. Castings
10. Forgings
11. Springs
Section four. Production testing and inspection
12. General
13. Safety precautions
14. Test media
15. Hydraulic test
Section five. Marking
16. Body marking
17. Identification plate
Section six. Performance testing
18. Type testing of safety valves for operating and
flow characteristics using water, steam, air or
other gas
19. Tests to determine operating characteristics
20. Tests to determine flow characteristics
21. Determination of coefficient of discharge and
certified discharge capacity
Section seven. Safety valves for boilers, superheaters,
reheaters and economizers
22. Boilers and superheaters
23. Reheaters and superheaters separated from the
boiler
24. Safety valves for economizers
25. Operating margins
Appendices
A. Derivation of superheat correction factors
B. Guidance on safety valve mounting
C. Inspection and testing facilities
Tables
1. Helical coil spring materials and mechanical
properties
2. Minimum duration of hydraulic shell test
3. Values of C relative to values of k
4. Capacity correction factors for back pressure (Kb)
5. Superheat correction factor KSh
Figures
1. Illustration of area definitions
2. Graph for value of constant K, the safety valve
spring correction factor
3. Compression factor Z as a function of reduced
pressure pr and reduced temperature Tr  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  370KB
Tile in English:  safety valves. specification for safety valves for steam and hot water

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