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BS 4434:1989

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Specification for safety aspects in the design, construction and installation of refrigerating appliances and systems
Available format(s)

Hardcopy , PDF

Superseded date

15-11-1995

Language(s)

English

Published date

31-05-1989

Foreword
Committees responsible
Specification
Section 1. General
1.0 Introduction
1.1 Scope
1.2 Definitions
1.3 Refrigerant groups
1.4 Categories of occupancy
1.5 Types of cooling system
Section 2. Design and construction
2.1 Refrigerant group and cooling system
2.2 Maximum charge of refrigerant
2.3 Design and maximum working pressures
2.4 Pressure vessels
2.5 Heat exchangers
2.6 Piping and fittings
2.7 Protection against excess pressure
2.8 Instrumentation
Section three. Installation
3.1 General
3.2 Machinery rooms
3.3 Safety provisions for personnel in refrigerated
      spaces
3.4 Refrigerant detectors
3.5 Electrical installations
3.6. Charging and discharging refrigerant
Section four. Testing, inspection, documentation and
marking
4.1 Testing
4.2 Inspection
4.3 Documentation
4.4 Marking
Section five. Instruction manual or leaflet
5.1 Provision of instruction manual or leaflet
5.2 Contents of instruction manual or leaflet
Appendices
A. Refrigerants and their physical properties
B. Materials
C. Pipe supports and hangers
D. Relationship between maximum working pressure and
     other pressures
E. Minimum design pressures for selected refrigerants
F. Ventilation and refrigerant detection in machinery
     rooms
G. Guide to the selection of electrical apparatus for
     hazardous (potentially explosive) areas
H. Guide to the operation and maintenance of
     commercial and industrial refrigerating appliances
     and systems in relation to safety
Tables
1. Group classification of refrigerants
2. Categories of occupancy
3. Types of cooling system
4. Selection of refrigerant group and cooling system
     in relation to category of occupancy
5. Maximum concentration of refrigerant in the event
     of major release
6. Refrigerants and their physical properties
7. Recommended maximum spacings for single pipe
     supports
8. Minimum design pressures
Figures
1. Schematic diagram of the relationship between the
     maximum working pressure and other pressures
     referred to in this standard
2. Selection of electrical apparatus for hazardous
     (potentially explosive) areas

Includes requirements for inspection. Applies to new systems, extensions and modifications and used systems being re-installed on another site. Also applies to the conversion of a system for use with a different refrigerant.

Committee
RHE/18
DevelopmentNote
BS DRAFT 95/702343 DC
DocumentType
Standard
Pages
34
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
ISO/R 1662:1971 Similar to
ISO 5149:1993 Similar to

BS 7120:1989 Specification for rating and performance of air to liquid and liquid to liquid chilling packages
BS 2501:1992 Specification for commercial refrigerated storage cabinets of the closed reach-in type
BS 2626:1992 Specification for lubricants for refrigerant compressors
BS 3122-1:1990 Refrigerant compressors Methods of test for performance
BS 6880-2:1988 Code of practice for low temperature hot water heating systems of output greater than 45 kW Selection of equipment
BS 4376-1:1991 Electrically operated blood storage refrigerators Specification for closed reach-in types
BS 6880-3:1988 Code of practice for low temperature hot water heating systems of output greater than 45 kW Installation, commissioning and maintenance

BS 5588-2:1985 Fire precautions in the design, construction and use of buildings Code of practice for shops
BS 4999-20:1972 Specification for general requirements for rotating electrical machines Classification of types of enclosure
BS 4667-3:1974 Breathing apparatus Fresh air hose and compressed air line breathing apparatus
BS 6759-3:1984 Safety valves Specification for safety valves for process fluids
BS 5378-1:1980 Safety signs and colours Specification for colour and design
BS 4667-2:1974 Specification for breathing apparatus Open-circuit breathing apparatus
BS 3456-102.24(1988) : 1988 SPECIFICATION FOR SAFETY OF HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - REFRIGERATORS AND FOOD FREEZERS
BS 2871-2:1972 Specification for copper and copper alloys. Tubes Tubes for general purposes
BS 1723-1:1986 Brazing Specification for brazing
BS 476-8:1972 Fire tests on building materials and structures Test methods and criteria for the fire resistance of elements of building construction
BS 5345-1:1976 Code of practice for the selection, installation and maintenance of electrical apparatus for use in potentially explosive atmospheres (other than mining applications or explosive processing and manufacture) Basic requirements for all Parts of the code
BS 4667-1:1974 Specification for breathing apparatus Closed-circuit breathing apparatus

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