1 - AS 2430.3-1991 CLASSIFICATION OF HAZARDOUS AREAS - SPECIFIC OCCUPANCIES
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
6 - 3.1 Area, hazardous
6 - 3.2 Area, non-hazardous
6 - 3.3 Authority, authority having jurisdiction
6 - 3.4 Capacity (of a tank or cylinder)
7 - 3.5 Gas capacity (of a tank or cylinder)
7 - 3.6 Metric standard conditions (MSC)
7 - 3.7 Vapour barrier
7 - 3.8 Drum
7 - 3.9 Pail
7 - 3.10 Cylinder
7 - 4 MEASUREMENT OF DISTANCES
7 - 5 VEHICLE WORKSHOPS
7 - 5.1 Scope of Clause
7 - 5.2 Dispensing pumps
7 - 5.3 Delineation of hazardous areas
7 - 5.3.1 At or above ground or street level
7 - 5.3.2 Below ground or street level
7 - 5.3.3 Pits or depressions
7 - 6 VEHICLE PARKING AREAS
7 - 6.1 Scope of Clause
7 - 6.2 Delineation of hazardous areas
7 - 6.2.1 At or above ground or street level
7 - 6.2.2 Below adjacent ground or street level
7 - 6.2.3 Lift wells
8 - 6.2.4 Depressions, pits or sumps
8 - 7 RESIDENTIAL GARAGES
8 - 7.1 Scope of Clause
8 - 7.2 Delineation of hazardous areas
8 - 7.2.1 At or above ground or street level
8 - 7.2.2 Below ground or street level
8 - 8 AIRCRAFT HANGARS
8 - 8.1 Scope of Clause
8 - 8.2 Delineation of hazardous areas
8 - 8.2.1 Pits or depressions
8 - 8.2.2 Hangars
8 - 8.2.3 Around alrcraft
8 - 8.2.4 Other areas
9 - 9 PETROL AND LP GAS DISPENSING STATIONS
9 - 9.1 Scope of Clause
9 - 9.2 Delineation of hazardous areas
9 - 9.2.1 Petrol dispensing units in outdoor locations
9 - 9.2.2 Petrol dispensing units in indoor locations
9 - 9.2.3 `Type A' LP gas dispensing devices in outdoor locations
10 - 9.2.4 Other LP gas dispensing devices in outdoor locations
11 - 9.2.5 Outlets of tank venting pipes
11 - 9.2.6 Other areas
11 - 10 MAJOR REFINERIES AND CHEMICAL PLANTS
11 - 10.1 Scope of Clause
11 - 10.2 Delineation of hazardous areas
11 - 10.2.1 Extent of hazardous areas
11 - 10.2.2 Open air situations
12 - 10.2.3 Enclosed premises and surrounding areas
13 - 10.2.4 Open premises and surrounding areas
14 - 10.2.5 Enclosed premises with plenum of safe atmosphere
14 - 11 FLAMMABLE LIQUIDS
14 - 11.1 Scope of Clause
14 - 11.2 Delineation of hazardous areas
14 - 11.2.1 Storage tank, above ground in open area
16 - 11.2.2 Underground storage tank
16 - 11.2.3 Drum or pail storage
16 - 11.2.4 Pump for flammable liquid transfer
16 - 11.2.5 Rail or road tanker filling-bottom loanding with vapour recovery
16 - 11.2.6 Rail or road tanker filling point-without vapour recovery
17 - 11.2.7 Garage for tank-vehicles, enclosed on more than on side
17 - 11.2.8 Drum or pail filling
17 - 11.2.9 Valves and fittings in liquid pipeline
17 - 11.2.10 Pits
17 - 11.2.11 Underground enclosures
17 - 12 HEAVIER-THAN-AIR FLAMMABLE GASES
17 - 12.1 Scope of Clause
18 - 12.2 Delineation of hazardous areas
18 - 12.2.1 Pressure storage tank
18 - 12.2.2 Tank filling or discharge connections
18 - 12.2.3 Gauging-vent valve on tank
18 - 12.2.4 Tabk safety relief valve
18 - 12.2.5 First stage regulator in connection with tank
18 - 12.2.6 Valve, flange or screwed connection
18 - 12.2.7 Stationary pumps
19 - 12.2.8 Compressors - Gas-air mixers
19 - 12.2.9 Bleed, vent or drain valve in liquid piping system
20 - 12.2.10 Pits containing pumps, compressors, regulators or valves in liquid or vapour lines, outdoors
20 - 12.2.11 Cylinder filling (other than in situ)
22 - 12.2.12 Cylinders installed for use, indoors
22 - 12.2.13 Cylinder storage, shed or building
22 - 12.2.14 Cylinders, outdoors, whether in storage or installed for use, exchange type
22 - 12.2.15 Cylinders, whether in storage or installed for use, outdoors, in situ fill type
23 - 13 LIGHTER-THAN-AIR FLAMMABLE GASES - GAS INDUSTRY CODES
23 - 13.1 Scope of Clause
23 - 13.2 Delineation of hazardous areas
23 - 13.2.1 General
23 - 13.2.2 Discharge points-vent pipe and relief valves
23 - 13.2.3 Pits
23 - 13.2.4 Cylinders, outdoors, where in storage or installed for use
23 - 13.2.5 Compressors
23 - 13.2.6 Vehicle filling hoses
23 - 13.2.7 Other areas
23 - 14 LIGHTER-THAN-AIR FLAMMABLE GASES - OTHER INSTALLATIONS
23 - 14.1 Scope of Clause
23 - 14.2 Delineation of hazardous areas
23 - 14.2.1 General
24 - 14.2.2 Enclosures
24 - 14.2.3 Gas equipment, outdoors
24 - 14.2.4 Gas equipment located in enclosed premises
24 - 14.2.5 Compressed gases in cylinders
26 - 15 FINISHING PROCESSES
26 - 15.1 Scope of Clause
26 - 15.2 Delineation of hazardous areas
26 - 15.2.1 Paint spraying and dipping
26 - 15.2.2 Drying and baking areas
26 - 15.2.3 Motor body workshops
26 - 15.2.4 Other areas
26 - 15.2.5 Powder coating
28 - 16 FLAMMABLE MEDICAL AGENTS
28 - 16.1 Scope of Clause
28 - 16.2 Delineation of hazardous areas
28 - 16.2.1 Storage of flammable medical agents
28 - 16.2.2 Anaesthetizing areas
28 - 17 FUME CUPBOARDS AND LABORATORIES
28 - 17.1 Scope of Clause
28 - 17.2 Delineation of hazardous areas
28 - 17.2.1 Fume cupboard
30 - 17.2.2 Laboratories where flammable liquids are used
30 - 18 FRUIT RIPENING ROOMS
30 - 18.1 Scope of Clause
30 - 18.2 Delineation of hazardous areas
30 - 19 SPECIAL INDUSTRIAL PROCESSES
30 - 19.1 Scope of Clause
30 - 19.2 Delineation of hazardous areas
30 - 19.2.1 Interior of equipment
31 - 19.2.2 In vicinity of open containers
32 - 19.2.3 In the vicinity of tightly enclosed equipment
32 - 19.2.4 Drycleaning equipment
32 - 19.2.5 Paint and similar materials
33 - 20 SEWAGE TREATMENT PLANTS AND SEWAGE PUMPING STATIONS
33 - 20.1 Scope of Clause
33 - 20.2 Delineation of hazardous areas
33 - 20.2.1 General
33 - 20.2.2 Open areas
34 - 20.2.3 Enclosed areas
34 - 20.2.4 Sewage pumping stations
34 - 20.2.5 Other areas
41 - APPENDIX A - FUME CUPBOARDS
41 - A1 SCOPE
41 - A2 EMERGENCY ISOLATOR
41 - A3 POWER FAILURE DISCONNECT DEVICE
41 - A4 WARNING
41 - A5 SUMP
41 - A6 EXHAUST SYSTEM
41 - A7 INSTALLATION OF GPOs