AS/NZS 2496:1995

1 - AS/NZS 2496:1995 BREATHING ATTACHMENTS FOR ANAESTHETIC PURPOSES FOR HUMAN USE
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
6 - 3.1 Adjustable pressure limiting (APL) valve
6 - 3.2 Breathing attachments
6 - 3.3 Breathing system
6 - 3.4 Connector
6 - 3.5 Elastomeric
7 - 3.6 Expiratory port (of a circle absorber or ventilator)
7 - 3.7 Flow-direction- sensitive component
7 - 3.8 Fresh (common) gas outlet
7 - 3.9 Fresh gas inlet connector
7 - 3.10 Fresh gas supply tube
7 - 3.11 Inhalation anaesthesia apparatus (includes gas machine and anaesthetic machine)
7 - 3.12 Inspiratory port (of a circle absorber or ventilator)
7 - 3.13 Non-rebreathing valve
7 - 3.14 Patient connection port
7 - 3.15 Receiving system
7 - 3.16 Reservoir bag port
7 - 3.17 Transfer system
7 - 4 MATERIALS FOR RIGID COMPONENTS FOR BREATHING ATTACHMENTS
8 - 5 ELECTRICAL CONDUCTIVITY
8 - 6 STERILIZATION
8 - 7 CONICAL FITTINGS MADE OF RIGID MATERIAL
8 - 7.1 Rigid conical fittings of 15 mm size
8 - 7.2 Rigid conical fittings of 19 mm size
8 - 7.3 Rigid conical fittings of 22 mm size
8 - 7.4 Rigid conical fittings of 23 mm size
8 - 7.5 Rigid conical fittings of 30 mm size
9 - 8 CONICAL FITTINGS MADE OF SEMI-RIGID PLASTICS MATERIAL EXCLUDING ELASTOMERS
9 - 9 SOCKETS MADE OF ELASTOMERIC MATERIAL
9 - 10 CONNECTIONS FOR RESERVOIR BAG PORT, RESERVOIR BAG AND CORRUGATED TUBING
9 - 10.1 General characteristics
9 - 10.2 Retention fitting
9 - 10.3 Reservoir bag tubing
10 - 10.4 Colour coding
10 - 11 SIZE AND SEQUENCE OF CONICAL FITTINGS FOR ADULT USE
10 - 11.1 Breathing system connections
10 - 11.2 Face mask fitting
10 - 11.3 Tracheal tube connectors
10 - 11.4 Fittings for flow- direction-sensitive components
11 - 11.5 Inspiratory and expiratory ports
11 - 12 FITTINGS CONNECTING ANAESTHETIC VENTILATOR, PATIENT AND HUMIDIFIER
11 - 12.1 General
11 - 12.2 22mm fitting
11 - 12.3 Connections other than 15 mm, 19 mm, 22 mm, 23 mm and 30 mm, sizes (non-standard connections)
11 - 13 SCAVENGING CONNECTIONS
11 - 13.1 Connecting tubing
12 - 13.2 Exhaust outlet
12 - 13.3 Receiving system connection (scavenging)
12 - 14 SIZE AND SEQUENCE OF CONICAL FITTINGS FOR PAEDIATRIC USE
12 - 14.1 General characteristics
12 - 14.2 Breathing system fittings
12 - 15 MARKING OF FLOW-DIRECTION-SENSITIVE COMPONENTS
12 - 15.1 General
12 - 15.2 Components incorporating valves
12 - 15.3 Flow-direction-sensitive equipment other than valves
12 - 15.4 Method of marking
12 - 16 APPLICATION OF SCREW-THREADED, WEIGHT- BEARING FITTINGS
12 - 16.1 General
13 - 16.2 Ports to which a breathing tube may be connected
13 - 16.3 Fittings for unidirectional valves on circle absorbers
13 - 16.4 Design of screw-threaded, weight-bearing fittings
13 - 16.5 High resistance components
13 - 17 CONNECTIONS FOR VAPORIZERS
14 - 18 FRESH-GAS INLET
30 - APPENDIX A - BREATHING ATTACHMENTS FOR USE WITH ADULTS- SUMMARY OF SIZE AND SEQUENCE OF FITTINGS*
31 - APPENDIX B - SOME WIDELY USED SYSTEMS INCORPORATING FLOW-DIRECTION-SENSITIVE COMPONENTS
31 - B1 SCOPE
31 - B2 GENERAL

Specifies basic requirements for breathing attachments for anaesthetic apparatus, including the sequence and dimensions of cone and socket joints (conical fittings) of 15mm, 19mm, 22mm, 23mm and 30mm sizes, used for adult and paediatric purposes. Dimensions and form of screw-threaded, weight-bearing connections for use with attachments for anaesthetic apparatus and ventilators are also specified.

This Standard specifies basic requirements for breathing attachments for anaesthetic apparatus, including the sequence and dimensions of cone and socket joints (conical fittings) of 15 mm, 19 mm, 22 mm, 23 mm and 30 mm sizes, used for adult and paediatric purposes.A conical fitting of 30 mm size is specified for scavenging. A 23 mm conical fitting is specified for vaporizers and manifold attachments outside the breathing system. The basic requirements for fresh gas inlets to components of breathing systems are also specified.The Standard also deals with dimensions and form of screw-threaded, weight-bearing connections for use with attachments for anaesthetic apparatus and ventilators.The 15 mm and 22 mm cones are intended primarily for use with breathing attachments. The 19 mm, 23 mm and 30 mm cones are intended for other applications which are not within the breathing system.22 mm screw-threaded, weight-bearing connections may be used to produce a more permanent connection between components than that provided by the cone and socket joint. They are particularly designed to allow heavy components to be safely mounted at the outlet from an anaesthetic or breathing machine to the inlet of a breathing system.

Originated as AS T37-1966.
Revised and redesignated AS 2496-1981.
Jointly revised and designated as AS/NZS 2496:1995.