BS 6680:1985

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. General requirements
4. Joints within the flameproof enclosure
5. Air inlet system
6. Exhaust and conditioning system
7. Flame traps
8. Fuel systems
9. Engine shut-down
10. Condition monitoring
11. Electrical apparatus
12. Verification testing
13. Maintenance literature
14. Marking
Appendices
A. Stage 1 type testing of the flameproof enclosure
B. Stage 2 type testing of the complete engine and
    ancillary fittings
C. Fire/flame resistance of non-metallic materials
D. Guidance on information to be supplied by the
    flameproof equipment supplier with equipment to be
    tested
Table
1. Maximum adjusted volumetric concentrations of CO
    and NOx permitted in the undiluted exhaust gases
Figures
1. Relationship between length and gap for flamepaths
2. Derivation of pressure rise time

Establishes requirements for flameproof equipment attached to, or forming part of, a diesel engine for use in coal, and other, mines susceptible to firedamp. Covers definitions, joints within the flameproof enclosure, air inlet system, exhaust and conditioning system, flame traps, fuel systems, engine shut-down, condition monitoring, electrical apparatus, verification testing, maintenance literature and marking.

This British Standard specifies requirements for flameproof equipment attached to, or forming part of, a diesel engine for use in coal, and other, mines susceptible to firedamp. The use of diesel engines in such mines imposes environmental constraints on the equipment and these constraints are detailed in the standard.

The tests which the diesel engine and its ancillary fittings are required to undergo to prove compliance with this standard are detailed in the appendices.

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