BS 1553-1:1977

Foreword
Cooperating organizations
Specification
1. Scope
2. References
3. Symbols (or elements of symbols) used in
     conjunction with other symbols
3.1 General
3.2 Pipelines
3.3 Valves: actuating methods
4. Basic functional symbols
4.1 Pipelines
4.2 Joints
4.3 End closures
4.4 Supports and hangers
4.5 Valves
4.6 Trap functions
4.7 Pipeline flexibility
4.8 Pipeline features and general equipment
4.9 Sensing elements for measurement and control
5. Basic and developed symbols for plant and equipment
5.1 Heat transfer equipment
5.2 Vessels and tanks
5.3 Pumps and compressors
5.4 Solids handling
5.5 Shaping and forming
5.6 Drying
5.7 Materials handling
5.8 Prime movers
5.9 Trucking
6. Heating and ventilating installations
6.1 Pipelines
6.2 Ducts (trunks)
6.3 Changes of section and/or size of duct (trunk)
6.4 Duct (trunk) bends: representation and design
6.5 Duct (trunk) fittings
6.6 Grills and diffusers
6.7 Dampers
6.8 Damper actuation
6.9 Heat exchange equipment
6.10 Air conditioning and ventilation equipment
Appendices
A. Representation of flow lines crossing (connected
     and unconnected)
B. Example of the use of symbols on a drawing of a
     low temperature hot water heating installation
C. Example of the use of symbols on a drawing of an
     extraction ventilation installation