BS 7074-2:1989
Current
The latest, up-to-date edition.
Application, selection and installation of expansion vessels and ancillary equipment for sealed water systems Code of practice for low and medium temperature hot water heating systems
Hardcopy , PDF
English
31-07-1989
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Foreword
Committees responsible
Section one. General
1. Scope
2. Definitions
3. Symbols, designations and units
4. Connection of expansion vessel to the system
5. Testing and commissioning
6. Maintenance
7. Workmanship
Section two. Low temperature systems
8. Design considerations
9. Application
10. Ancillary equipment
Section three. Medium temperature systems
11. Design considerations
12. Application
13. Ancillary equipment
Appendix
A. Examples of recommended procedure for the
calculation of the size of expansion vessels
Tables
1. Symbols, designations and units
2. Expansion percentages (e) for various flow
temperatures (tf) from 4 deg C initial temperature
3. Pressure allowance
Figures
1. System pressure variations: recommended arrangement
2. System pressure variations: neutral point at pump
discharge
3. System pressure variations: neutral point remote
from pump
4. Low temperature hot water system
5. Multiple boiler installations for low temperature
and medium temperature applications
6. Typical expansion percentage of water mixed with
anti-freezing agent versus temperature
7. Medium temperature hot water system
Vessels and systems for heating larger premises - commercial and industrial.
| Committee |
PVE/1
|
| DevelopmentNote |
Supersedes 87/73420 DC (09/2005) Reviewed and confirmed by BSI, November 2012. (10/2012)
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Part of BS 7074 gives recommendations on the application of expansion vessels complying with BS 4814 and having a maximum pressure of 7 bar* for use in hot water heating systems. It includes description, design considerations and application.
Sections one and two cover low temperature systems in which the flow temperature does not exceed 100 °C.
Sections one and three cover medium temperature systems in which the flow temperature does not exceed 120 °C.
Recommendations are also given on:
- the application and use of ancillary equipment and
- testing, commissioning and maintenance.
NOTE. The titles of the publications referred to in this standard are listed on the inside back cover.
| BS 4814:1990 | Specification for expansion vessels using an internal diaphragm, for sealed hot water heating systems |
| BS 4814:1976 | Specification for expansion vessels using an internal diaphragm, for sealed hot water heating systems |
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