BS 5885-1:1988

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Verification
4. Gas flow pipework and controls
4.1 Filters and strainers
4.2 Pipework and flow components
4.3 Gas flow in pipework
4.4 Vents on safety shut-off systems
4.5 Gas supply
4.6 Safety shut-off systems
5. Combustion air, pre-purge and post-purge
5.1 Combustion air
5.2 Pre-purge and post-purge
6. Electrical supply and ancillary equipment
6.1 Electricity supply
6.2 Electrical equipment
6.3 Instrument and control fluid supplies
7. Flame safeguard system
7.1 Flame detection
7.2 Start-gas glame establishment
7.3 Main flame establishment
8. Control system requirements
9. Fuel/air ratio control
10. Materials
10.1 General
10.2 Metallic materials
10.3 Non-metallic materials
10.4 Glands and spindle packings
10.5 Jointing materials
10.6 Flexible pipes and pipe connections
11. Constructional requirements
11.1 Burner construction
11.2 Fixing
12. Manufacturer's literature
13. Marking
14. Commissioning instructions
Appendices
A. Dual fuel burners
B. Over-pressure protection
Tables
1. Test gases
2. Wall thickness of pipes complying with BS 3601
3. Connections for valves and pipework
4. Inlet pressure ranges
5. Main gas safety shut-off valve system requirements
6. Flame safeguard drop-out times
7. Summary of materials

Safety aspects for burners employing forced or mechanically induced draught, which may be packaged or non packaged types and designed for use with 1st, 2nd and 3rd family gases. Covers single burners and dual fuel burners when operating only on gas.

This Part of BS 5885 specifies minimum requirements for automatic gas burners employing forced or mechanically induced draught and having a heat input rating of 60 kW and above. such burners may be of packaged or non-packaged types, and may be designed for use with 1st, 2nd or 3rd family gases. BS 5885 applies to burners intended for use in industrial processes. rt does not cover burners intended for use in heating appliances, e.g. boilers, which are covered by BS EN 616, AutomatiC forced draught burners for gaseous fuels. It covers single burners and dual fuel burners when operating only on gas. It does not cover multi-burners. Guidance on dual fuel burners is given in Appendix A. This Part of BS 5885 specifies requirements primarily for the safety aspects of automatic control and operation. It does not constitute a complete specification for automatic burners and their ancillary equipment. NOTE 1 The use of gases which are dirty, wet, of variable composition or high dewpoint may cause difficulties which are not covered in detail by this Part of BS 5885. In such cases, suppliers and users of equipment will need to take additional measures to comply with the requirements of this standard. NOTE 2 Burners complying with this Part of BS 5885 meet the statutory requirements for the protection against flow of air into piped gas supplies in the following circumstances: where the maximum combustion air pressure is not greater than 50 mbar1); where the maximum combustion air pressure is not greater than 15 mbar, and where the start-gas and main gas supplies are each under the control of at least one class 1 safety shut-off valve of size not greater than 50 mm; where the start-gas and main gas supplies are each under the control of at least one safety shut-off valve with a proved capability of withstanding a reverse flow pressure differential of at least twice the maximum combustion air pressure. In other circumstances burners complying with this Part of BS 5885 may require additional protection, e.g. non-return valves, and in such cases reference should be made to the fuel supplier. NOTE 3 The titles of the publications referred to in this standard are listed on pages 23, 24 and on the inside back cover.