BS 779:1989
Current
The latest, up-to-date edition.
Specification for cast iron boilers for central heating and indirect hot water supply (rated output 44 kW and above)
Hardcopy , PDF
English
31-10-1989
Foreword
Committees responsible
Specification
Section one. General
1.1 Scope
1.2 Definitions
1.3 Performance
Section two. Materials
2.1 Boiler pressure bearing parts
2.2 Refractory materials
2.3 Pulling-up bolts and tie rods
Section three. Construction and workmanship
3.1 Testing
3.2 Repairs to castings by welding
3.3 Boiler openings
3.4 Dampers, doors and observation ports
Section four. Mountings and fittings
4.1 Safety valves
4.2 Vent pipes
4.3 Pressure gauges
4.5 Temperature gauges
Section five. Combustion equipment
5.1 General
5.2 Solid fuel firing
5.3 Liquid fuel firing
5.4 Gas firing
Section six. Automatic controls and electrical
installation
6.1 Automatic controls
Section seven. Inspection and marking
7.1 Inspection
7.2 Marking
Appendices
A. Installation provisions
B. Electrical installation
C. Information to be supplied by the purchaser
D. Information to be supplied by the manufacturer
Tables
1. Tapping sizes for safety valves
2. Sizes for safety valves (open vented systems
only)
3. Tapping sizes for vent pipes
4. Minimum open vent pipe sizes
Figure
1. Heating system categories
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