BS 5156:1985

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Types
4. Nominal size range
5. Nominal pressure designations
6. Pressure/temperature ratings
7. Dimensions and tolerances of body ends
Section two. Design and operation
8. Design
9. Operation
Section three. Materials
10. Materials
Section four. Testing
11. Pressure test requirements
12. Test certificate
Section five. Marking
13. General
14. Body markings
15. Identification plate markings
16. Diaphragm markings
17. Marking indicating body lining
18. Material symbols
Section six. Preparation for storage and transportation
19. General
20. Diaphragm positions
21. Body ends
Appendices
A. Information to be supplied by the purchaser
B. Typical diaphragm valve constructions
Tables
1. Face-to-face dimensions for flanged body end valves
    and end-to-end dimensions for butt weld end valves
2. Materials
3. Test durations
Figures
1. Typical weir pattern diaphragm valve
2. Typical straight through pattern diaphragm valve
3. Typical weir pattern valve
4. Typical straight through pattern valve

Specifies size, rating, design, materials, marking, preparation for transport and storage and pressure testing requirements for flanged and screwed diaphragm valves with nominal pressure up to PN 16. For flanged valves covers the range DN 10 to DN 300 and for valves with internal screwed threads, sizes ¼ to 3.