BS 7327-1:1990

Committees responsible
Foreword
Specification
Section 1. General
1.1 Scope
1.2 Definitions
Section 2. Contents, filling and overall mass of
extinguishers
2.1 Filling deviation
2.2 Halons acceptable for use
2.3 Propellant
2.4 Filling density
2.5 Cleanliness and contents
2.6 Maximum overall mass
2.7 Configuration
Section 3. Construction. All extinguishers
3.1 Venting
3.2 Mounting
3.3 Pipework and fittings
3.4 Corrosion resistance
3.5 Pressure indicating device
Section 4. Construction. Low pressure extinguishers
4.1 Resistance to internal pressure
4.2 Minimum burst pressure
Section 5. Construction. High pressure extinguishers
5.1 Body
5.2 Pressure relief device
5.3 Operating head materials
5.4 Resistance of fittings to internal pressure
5.5 Minimum burst pressure of fittings
Section 6. Additional requirements for non-rechargeable
extinguishers with permanently attached swaged closures
6.1 Maximum capacity
6.2 Closures
6.3 Dimensions
Section 7. Performance
7.1 Leakage
7.2 Duration of discharge
7.3 Fire extinguishing performance
Section 8. Installation instructions and marking of
extinguishers
8.1 General
8.2 Marking of high pressure extinguisher bodies
8.3 Installation and servicing instructions and
      information
Section 9. Production and type testing
9.1 General
9.2 Low pressure extinguishers
9.3 Fittings for high pressure extinguishers
9.4 Non-rechargeable extinguishers with permanently
      attached swaged closures
9.5 Retention of charge
Appendices
A. Test for security of mounting
B. Test for corrosion resistance of extinguishers and
     fittings
C. Pressure tests
D. Test for duration of discharge
Tables
1. Mechanical properties of copper alloys
2. Batch sampling plan following failure below design
     burst pressure

Design and performance requirements for metal bodied fixed fire extinguishers suitable for installation by the user.

This Part of BS 7327 specifies manufacturing requirements for rechargeable and non-rechargeable metal-bodied small fixed fire extinguishers of the stored pressure type containing either halon 1211 or halon 1301. It relates only to fixed fire extinguishers for separate installation, i.e. not mechanically or electrically linked to any other extinguisher.

It does not specify installation requirements or recommendations for safe use. Information on the safe use of halons is given in BS 5306-5, and HSE Guidance Note GS 16.

NOTE 1 All pressures in this standard are gauge pressures expressed in bar.

1 bar = 10⁵ N/m² = 100 kPa.

NOTE 2 The titles of the publications referred to in this standard are listed on the inside back cover.