AS 2927-1987

1 - AS 2927-1987 THE STORAGE AND HANDLING OF LIQUEFIED CHLORINE GAS
4 - PREFACE
5 - CONTENTS
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE.
8 - 1.2 APPLICATION.
8 - 1.3 NEW DESIGNS AND INNOVATIONS.
8 - 1.4 REFERENCED DOCUMENTS
8 - 1.5 DEFINITIONS
8 - 1.5.1 Access
8 - 1.5.2 Approved or approval
8 - 1.5.3 Approved secure area
8 - 1.5.4 Authorized
8 - 1.5.5 Bulk storage vessel (BSV)
8 - 1.5.6 Chlorinator
9 - 1.5.7 Chlorine
9 - 1.5.8 Container
9 - 1.5.9 Cylinder
9 - 1.5.10 Dedicated store
9 - 1.5.11 Drum
9 - 1.5.12 Nominal effective life (of SCBAs)
9 - 1.5.13 Opening (of a wall)
9 - 1.5.14 Protected works
9 - 1.5.15 Public place area
9 - 1.5.16 Road tanker
9 - 1.5.17 Secured area
9 - 1.5.18 Self-contained breathing apparatus (SCBA)
9 - 1.5.19 Statutory authority
9 - 1.5.20 Tank
9 - 1.5.21 Vaporizer
9 - 1.6 CLASSIFICATION OF CHLORINE
9 - 1.7 IDENTIFICATION AND MARKING REQUIREMENTS
9 - 1.7.1 General
9 - 1.7.2 Cylinders
9 - 1.8 HAZARDOUS PROPERTIES OF CHLORINE
9 - 1.8.1 Introduction
9 - 1.8.2 General.
9 - 1.8.3 Toxicity
9 - 1.8.4 Flammability
10 - 1.8.5 Density
10 - 1.8.6 Colour
10 - 1.8.7 Odour
10 - 1.8.8 Corrosive action on metals
10 - 1.8.9 Reactivity to combustibles, lubricants
10 - 1.8.10 Thermal expansion
11 - SECTION 2 STORAGE REQUIREMENTS
11 - 2.1 SCOPE OF SECTION.
11 - 2.2 GENERAL REQUIREMENTS
11 - 2.2.1 Introduction
11 - 2.2.2 Site approval
11 - 2.2.3 Foundations
11 - 2.2.4 Access to installations
11 - 2.2.5 Electrical equipment.
11 - 2.2.6 Access restrictions on personnel
11 - 2.3 LOCATION OF CHLORINE STORAGE AREAS
11 - 2.3.1 General
11 - 2.3.2 Ammonia storage
11 - 2.3.3 Flammable or combustible liquids
11 - 2.3.4 Other materials in storage area
12 - 2.4 OUTDOOR STORAGE AREAS
12 - 2.4.1 Unsecured areas
12 - 2.4.2 Approved secure areas
12 - 2.5 INDOOR STORAGE AREAS
12 - 2.5.1 Materials of construction
12 - 2.5.2 Doors - operation and maintenance
12 - 2.5.3 Signs
12 - 2.5.4 Pits, sumps and machinery wells
12 - 2.5.5 Ventilation of storage areas
13 - 2.5.6 Chlorinators
14 - SECTION 3 PIPING AND PIPELINES
14 - 3.1 SCOPE OF SECTION.
14 - 3.2 MATERIALS
14 - 3.3 FIXED AND UNDERGROUND PIPING
14 - 3.3.1 Metal piping
14 - 3.3.2 Plastics piping
14 - 3.3.3 Underground piping.
14 - 3.3.4 General.
14 - 3.3.5 Pressure relief devices
14 - 3.4 FLEXIBLE PIPING
14 - 3.4.1 General
14 - 3.4.2 Flexible copper tubing
14 - 3.4.3 Materials for flexible hoses
14 - 3.5 GRADIENT OF PIPING.
14 - 3.6 REDUCTION OF LIQUEFACTION HAZARD
15 - 3.7 VALVES
15 - 3.7.1 General
15 - 3.7.2 Globe valves
15 - 3.7.3 Ball valves
15 - 3.7.4 Automatic or remote shut-off valves
15 - 3.7.5 Vacuum-operated valves
15 - 3.7.6 Gas valves under vacuum
15 - 3.8 JOINTS AND FITTINGS
15 - 3.8.1 Joints
15 - 3.8.2 Fittings
15 - 3.8.3 Pressure gauges and pressure switches
15 - 3.9 MANIFOLDING OF CHLORINE CONTAINERS
15 - 3.9.1 Gas supply systems
15 - 3.9.2 Liquid supply systems
15 - 3.10 COLOUR CODING.
16 - SECTION 4 PUBLIC RECREATION AREAS AND SWIMMING POOLS
16 - 4.1 SCOPE OF SECTION.
16 - 4.2 STORAGE AND SUPPLY AREAS.
16 - 4.3 SELF-CONTAINED BREATHING APPARATUS.
17 - SECTION 5 OPERATING PROCEDURES
17 - 5.1 SCOPE OF SECTION
17 - 5.2 PERSONNEL.
17 - 5.3 STORAGE OF CONTAINERS
17 - 5.3.1 Generral
17 - 5.3.2 Cylinders.
17 - 5.3.3 Drums and tanks.
17 - 5.4 HANDLING OF CONTAINERS
17 - 5.4.1 Valve protection caps
17 - 5.4.2 Cylinders
17 - 5.4.3 Drums.
17 - 5.4.4 Tanks.
17 - 5.5 CONNECTION OF CONTAINERS
17 - 5.5.1 Number of containers interconnected
17 - 5.5.2 Orientation of containers
17 - 5.5.3 Making and breaking connections
17 - 5.5.3.1 Safety precautions
17 - 5.5.3.2 Integrity of new connections
17 - 5.6 WITHDRAWAL OF CHLORINE - RESIDUAL PRESSURE
17 - 5.7 INSTALLATION INSPECTIONS/CHECKS
18 - SECTION 6 MAINTENANCE OF INSTALLATIONS
18 - 6.1 SCOPE OF SECTION.
18 - 6.2 PROCEDURES FOR MAINTENANCE
18 - 6.2.1 Personnel
18 - 6.2.2 Openings to area during maintenance
18 - 6.2.3 Preparing for maintenance
18 - 6.2.4 Exclusion of moisture from system
18 - 6.2.5 Lubrication and degreasing.
18 - 6.2.6 Components/replacement parts
18 - 6.2.7 Piping and fittings
19 - SECTION 7 SAFETY EQUIPMENT
19 - 7.1 SCOPE OF SECTION
19 - 7.2 GENERAL REQUIREMENTS
19 - 7.3 INSPECTION AND MAINTENANCE
19 - 7.4 PERSONNEL SAFETY EQUIPMENT
19 - 7.4.1 Self-contained breathing apparatus (SCBA)
19 - 7.4.2 Protective clothing
19 - 7.4.3 Safety showers and eye irrigators.
19 - 7.4.4 First aid instructions.
19 - 7.5 PLANT SAFETY EQUIPMENT
19 - 7.5.1 Leak detectors
20 - 7.5.2 Vapour dispersal
20 - 7.5.3 Sprinkler systems
20 - 7.5.4 Foam generators.
20 - 7.5.5 Caustic venting tanks
20 - 7.5.6 Wind indicators
21 - SECTION 8 EMERGENCY PROCEDURES - PLANT
21 - 8.1 SCOPE OF SECTION
21 - 8.2 EMERGENCY PLANS
21 - 8.3 LEAKS
21 - 8.3.1 Gas leaks
21 - 8.3.2 Liquid leaks
21 - 8.4 FIRES
21 - 8.4.1 General information
22 - 8.4.2 Emergency action
23 - SECTION 9 TRANSPORTATION
24 - APPENDIX A - CHLORINE - PHYSICAL AND CHEMICAL DATA
25 - APPENDIX B - FIRST AID
25 - B1 SCOPE.
25 - B2 PHYSIOLOGICAL SYMPTOMS
25 - B3 CONCENTRATION EFFECTS OF CHLORINE GAS
25 - B4 PLAN OF ACTION.
25 - B5 TREATMENT
25 - B5.1 General
25 - B5.2 Inhaled
25 - B5.3 Eyes
26 - B5.4 Skin
27 - APPENDIX C - HAZARD SIGNS FOR CHLORINE
28 - APPENDIX D - GUIDE TO THE SELECTION OF CONSTRUCTION MATERIALS FOR USE WITH CHLORINE
29 - APPENDIX E - TEMPERATURE/PRESSURE RELATIONSHIP OF LIQUID CHOLORINE
30 - APPENDIX F - GRAPH ILLUSTRATING THE EXPANSION OF WATER AND LIQUID CHLORINE OVER THE TEMPERATURE RANGE -30°C TO 60°C

Lays down recommendations for the safe storage, handling and use of liquefied chlorine gas, in cylinders, drums or bulk storage vessels. The code is of particular relevance for storing chlorine gas and for the use of chlorine from containers for the treatment of large swimming pools or large chemical plants. It has been written having in mind the need for a national code to be applied where large scale treatment of waters or chemical processing for disinfection is being undertaken. Operation, maintenance, equipment requirements, safety and emergency procedures are all dealt with, together with useful appendices including first aid requirements.

This Standard sets out requirements and recommendations for the safe storage, handling and use of liquefied chlorine gas. It also includes the use of chlorine in gaseous form.

Under Revision see DR 99498