BS 5041-1:1987

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Definitions
3 Valve types
4 Classification by pressure rating
5 Nominal inlet sizes
6 Temperature rating
7 Marking
Section two. Design
8 Materials
9 Valve bodies
10 Valve inlets
11 Valve outlets
12 Bonnets
13 Stems
14 Stem sealing on globe valves
15 Glands on globe valves
16 Disks and disk facings
17 Handwheels and operation
18 Bolting
19 Pressure retention
20 Strap
21 Blank cap and chain
22 Water flow rate and outlet pressure
23 Outlet pressure at restricted pressure (high
    pressure valves only)
24 Resistance to high temperature (diaphragm valves
    only)
Section three. Production testing requirements and test
               certificate
25 Hydrostatic tests
26 Pressure control test (high pressure valves only)
27 Test certificate
Appendices
A Test method
B Recommendations for the information to be supplied
    by the purchaser to the manufacturer
Tables
1 Choice of materials for components and parts
2 Bolting for valves
3 Body test pressures and durations
4 Seat test pressures and durations
Figure
1 Valve types

Material, design and performance requirements for copper alloy globe and diaphragm valves for wet rising mains to BS 5306-1. Covers high and low pressure types.

This Part of BS 5041 specifies requirements for copper alloy globe valves generally complying with BS 5154 and diaphragm valves generally complying with BS 5156, both suitable for installation as landing valves on wet risers. The valves have screwed or flanged inlets and also delivery hose connections complying with BS 336. This standard covers valves of nominal pressure (PN) designations 15 bar and 20 bar and nominal inlet sizes DN 40 to DN 65 for flanged ends and 1½ and 2½ for screwed ends.

NOTE 1 Unless otherwise stated all pressures are gauge pressures expressed in bar: 1 bar = 10⁵ N/m² = 100 kPa.

NOTE 2 Information which the purchaser is recommended to supply to the manufacturer is given in Appendix B and does not form part of the specification.

NOTE 3 The titles of the publications referred to in this standard are listed on the inside back cover.