AS 2896-2011

1 - AS 2896-2011 MEDICAL GAS SYSTEMS-INSTALLATION AND TESTING OF NON-FLAMMABLE MEDICAL GAS PIPELINE SYSTEMS
4 - PREFACE
5 - CONTENTS
7 - FOREWORD
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 APPLICATION
9 - 1.3 REFERENCED DOCUMENTS
9 - 1.4 DEFINITIONS
9 - 1.4.1 Alarm system
9 - 1.4.2 Boom
9 - 1.4.3 Central bulk gas supply (central supply)
9 - 1.4.4 Column
9 - 1.4.5 Connector
9 - 1.4.6 Control equipment
9 - 1.4.7 Coupler
9 - 1.4.8 Cryogenic liquid system
9 - 1.4.9 Design flow rate
10 - 1.4.10 Emergency gas supply
10 - 1.4.11 Emergency power supply (uninterruptible power supply)
10 - 1.4.12 Essential power supply
10 - 1.4.13 Extra-low voltage (ELV)
10 - 1.4.14 Ferrule
10 - 1.4.15 Fixed secondary equipment (FSE)
10 - 1.4.16 Gas specific
10 - 1.4.17 Hose
10 - 1.4.18 Hospital-accredited representative
10 - 1.4.19 Isolating valve (shut-off valve)
10 - 1.4.20 Line pressure safety valve
10 - 1.4.21 Medical air
10 - 1.4.22 Medical air compressor system
10 - 1.4.23 Medical gas pipeline system
11 - 1.4.24 Non-return valve
11 - 1.4.25 Normal power supply
11 - 1.4.26 Occluded suction
11 - 1.4.27 Pedestal
11 - 1.4.28 Pendant
11 - 1.4.29 Pipeline distribution system
11 - 1.4.30 Primary gas supply
11 - 1.4.31 Primary pressure safety valve
11 - 1.4.32 Pressure regulator
11 - 1.4.33 Secondary gas supply
11 - 1.4.34 Self-sealing valve
11 - 1.4.35 Service facility
11 - 1.4.36 Service head
12 - 1.4.37 Sleeve index system (SIS)
12 - 1.4.38 Source of gas supply
12 - 1.4.39 Special care locations
12 - 1.4.40 Suction system
12 - 1.4.41 Surgical tool air
12 - 1.4.42 Terminal unit
12 - 1.4.43 Wall ducting
13 - SECTION 2 SOURCE OF SUPPLY
13 - 2.1 GENERAL
13 - 2.2 SOURCE OF SUPPLY
13 - 2.3 PROVISION IN CASE OF FAILURE OF SUPPLY
13 - 2.3.1 Special care locations
13 - 2.3.2 Cryogenic liquid systems
14 - 2.4 CYLINDER SUPPLY SYSTEM
14 - 2.4.1 General
14 - 2.4.2 Manifold
15 - 2.4.3 Manifold isolation
15 - 2.4.4 Manifold reset
15 - 2.4.5 Manifold headers
16 - 2.4.6 Manifold control panel
16 - 2.4.7 Cylinder racks
17 - 2.4.8 Marking of maximum working pressure on the manifold
17 - 2.4.9 Cylinder lead
17 - 2.4.10 Emergency gas supply
18 - 2.5 PRESSURE REGULATORS
18 - 2.6 DESIGN OF GAS CONTROL SYSTEMS
19 - 2.7 PRESSURE RELIEF VALVES
19 - 2.7.1 Primary pressure relief valve
19 - 2.7.2 Line pressure relief valve
19 - 2.7.3 Exhausts
19 - 2.8 CRYOGENIC SYSTEMS
19 - 2.8.1 General
20 - 2.8.2 Secondary supply
20 - 2.8.3 Emergency supply
20 - 2.8.4 Primary main check valve
20 - 2.8.5 Cryogenic liquid vessel connections
20 - 2.9 MEDICAL AIR SYSTEM
20 - 2.9.1 General
21 - 2.9.2 Medical air source
24 - 2.9.3 Cylinder supply system
24 - 2.9.4 Control systems for pendants and columns
31 - 2.10 MEDICAL SUCTION SYSTEMS
31 - 2.10.1 General
31 - 2.10.2 Pipeline suction system (vacuum)
35 - 2.10.3 Compressed gas venturi ejector-operated suction system
36 - 2.10.4 Anaesthetic gas scavenging (system)
36 - 2.11 AIR FOR SURGICAL TOOLS
38 - 2.12 LOCATIONS OF SOURCES OF GAS SUPPLY
38 - 2.12.1 Cryogenic liquid systems
38 - 2.12.2 Gas manifold system
38 - 2.12.3 Electrical fittings
38 - 2.12.4 Ambient temperature
38 - 2.13 ENCLOSURES FOR CYLINDER SUPPLY SYSTEMS
38 - 2.13.1 Cylinder storage
39 - 2.13.2 Installation inside a building
39 - 2.13.3 Installation outdoors
39 - 2.13.4 Interior and exterior enclosures
40 - 2.13.5 Signs
40 - 2.13.6 Delivery access and docks
41 - SECTION 3 GENERAL REQUIREMENTS
41 - 3.1 ALARM SYSTEMS
41 - 3.1.1 General
42 - 3.1.2 Installation requirements
43 - 3.1.3 Indicator panels
44 - 3.1.4 Operating alarm systems
45 - 3.2 MATERIALS
45 - 3.2.1 General
45 - 3.2.2 Oxygen compatibility of components
45 - 3.2.3 Cleaning of pipelines and components
46 - 3.3 REQUIREMENTS FOR PIPELINES
46 - 3.3.1 General
46 - 3.3.2 Pipeline design pressure and flows
46 - 3.3.3 In-line fittings and valves
47 - 3.3.4 Surgical tool air regulator
47 - 3.4 PIPELINE SHUT-OFF VALVES
47 - 3.4.1 General
47 - 3.4.2 Valve boxes
47 - 3.4.3 Positioning
48 - 3.5 TERMINAL UNITS AND CONNECTORS
48 - 3.5.1 General
48 - 3.5.2 Form and dimensions
49 - 3.5.3 Secondary shut-off valve
49 - 3.5.4 Performance
49 - 3.5.5 Siting of terminal units
51 - 3.5.6 Identification
51 - 3.5.7 Discharge requirements for venturi ejector-operated suction outlets
52 - 3.5.8 Connections between terminal units and equipment
52 - 3.6 IDENTIFICATION OF PIPELINES
52 - 3.6.1 Pipelines
52 - 3.6.2 Durability of identification
53 - 3.7 PRESSURE GAUGES
56 - SECTION 4 INSTALLATION REQUIREMENTS FOR PIPELINES
56 - 4.1 GENERAL
56 - 4.2 ELECTRICAL SEGREGATION
56 - 4.3 PROTECTION OF PIPELINES
56 - 4.3.1 General
56 - 4.3.2 In hazardous areas
56 - 4.3.3 Covered, buried or concealed pipelines
57 - 4.3.4 Electrical earth protection
58 - 4.4 MEDICAL GAS RISERS
58 - 4.5 RISERS AND DROPPERS TO TERMINAL UNITS
58 - 4.6 SLEEVES
58 - 4.7 CONTACT WITH CORROSIVE MATERIALS
58 - 4.8 ROUTING
58 - 4.9 CUTTING INTO AN EXISTING SYSTEM
58 - 4.10 INTERCONNECTION
58 - 4.11 PIPELINE SUPPORTS
59 - 4.12 COPPER PIPELINE JOINTS
59 - 4.12.1 Brazing
59 - 4.12.2 Threaded and flange joints
59 - 4.12.3 Brazing alloy
60 - 4.13 CONNECTION TO EXISTING SYSTEMS
60 - 4.13.1 General
60 - 4.13.2 Installation of an additional pipeline
60 - 4.13.3 Sealing and labelling of isolating valve
60 - 4.13.4 Marking of affected terminal units
60 - 4.13.5 Testing for leaks after addition to the system
60 - 4.14 FIXED SECONDARY EQUIPMENT
60 - 4.14.1 General
60 - 4.14.2 Common requirements of all fixed secondary equipment
62 - 4.14.3 Specific requirements of pendants and booms
63 - 4.14.4 Specific requirements of columns and pedestals
63 - 4.14.5 Specific requirements of wall ducting
64 - SECTION 5 TESTING AND CERTIFICATION
64 - 5.1 GENERAL
64 - 5.2 TESTING, VERIFICATION AND CERTIFICATION
65 - 5.3 LABELLING OF TERMINAL UNITS
65 - 5.4 TESTS AND CHECKS ON PIPELINE BEFORE CONCEALMENT
65 - 5.4.1 General
65 - 5.4.2 Visual check
65 - 5.4.3 Initial pressure test
66 - 5.4.4 Zone isolation valve tests
66 - 5.4.5 Particulate matter tests
66 - 5.4.6 Test for cross-connections
67 - 5.5 TESTS AND COMMISSIONING OF THE COMPLETE PIPELINE SYSTEM
67 - 5.5.1 General
67 - 5.5.2 Pressure test
67 - 5.5.3 Tests for flow rate and pressure
70 - 5.6 FILLING SYSTEM WITH PROPER GAS AND FINAL COMMISSIONING
70 - 5.6.1 General
70 - 5.6.2 Purging with the proper gas
70 - 5.6.3 Tests on supply plant
71 - 5.6.4 Tests on alarm systems
71 - 5.6.5 Test for gas identity
72 - 5.7 CERTIFICATION OF SYSTEMS
72 - 5.7.1 Operational test
72 - 5.7.2 Records
72 - 5.7.3 Handover instructions
72 - 5.7.4 Certification and operation manual
72 - 5.7.5 Certificate of compliance
72 - 5.8 AS-INSTALLED DRAWINGS
72 - 5.8.1 General
72 - 5.8.2 Marking
72 - 5.8.3 Updating
73 - 5.8.4 Supplementary master drawing
73 - 5.8.5 Emergency reference
74 - SECTION 6 MAINTENANCE
74 - 6.1 GENERAL
74 - 6.2 SAFETY AND WARNING DEVICES
74 - 6.3 SOURCE OF SUPPLY
74 - 6.3.1 Checking for proper operation
74 - 6.3.2 Inspection of manifold system
75 - 6.3.3 Checking of manifolds
75 - 6.3.4 Inspection of air compressor and suction pump system
76 - 6.4 PURITY OF MEDICAL AIR
76 - 6.5 MAINTENANCE OF TERMINAL UNITS
76 - 6.6 PRESSURE GAUGES AND PRESSURE SWITCHES
76 - 6.7 SERVICE MANUALS
76 - 6.8 LOW PRESSURE FLEXIBLE HOSE ASSEMBLIES
77 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
79 - APPENDIX B - GUIDE TO PERFORMANCE OF TYPICAL MEDICAL GAS PIPING SYSTEMS
79 - B1 SCOPE
79 - B2 GENERAL
86 - APPENDIX C - OPERATING ALARM SYSTEMS
88 - APPENDIX D - RECOMMENDATIONS FOR MATERIALS AND JOINTING TECHNIQUES FOR THE PIPELINE
88 - D1 SCOPE
88 - D2 METALS
88 - D3 JOINTING METHODS
90 - APPENDIX E - OUTLINE FOR DETERMINING COMPETENCE OF INSTALLER
91 - APPENDIX F - GUIDANCE TO QUALITY OF WORKMANSHIP IN CONSTRUCTION
91 - F1 GENERAL
91 - F2 PIPE BENDS
92 - APPENDIX G - FLUXLESS BRAZING TECHNIQUE
92 - G1 SCOPE
92 - G2 GENERAL
92 - G3 GENERAL BRAZING TECHNIQUE
92 - G4 MATERIALS
93 - G5 CHOICE OF INERT GAS
93 - G6 HAZARD WITH THE USE OF CARBON DIOXIDE
93 - G7 PRECAUTIONS
93 - G8 USE OF CARBON DIOXIDE
94 - G9 PIPEWORK ASSEMBLY
94 - G10 INITIAL PIPELINE FLUSH
95 - G11 BRAZING OPERATIONS
96 - G12 INSPECTION OF JOINTS
100 - APPENDIX H - LOGISTIC DIAGRAM, TEST CERTIFICATES, NONCONFORMANCE REPORTING AND CONTRACT COMPLETION CERTIFICATE FOR...
100 - H1 SCOPE
100 - H2 GENERAL
111 - APPENDIX I - TERMINAL UNIT TEST FORM
112 - APPENDIX J - RELATIONSHIP BETWEEN TEMPERATURE AND CERTAIN PRESSURE RANGES OF A GIVEN MASS OF PERFECT GAS ASSUMING VOLUME...
113 - APPENDIX K - TEST PRESSURE/TEMPERATURE VARIATION FOR SUCTION
114 - APPENDIX L - CONVERSION FACTORS FOR UNITS USED IN THE MEASUREMENT OF PRESSURE

Specifies requirements for the safety aspects, construction, testing, operation and maintenance of non-flammable medical gas pipeline systems used for patient care, including therapeutic, diagnostic and prophylactic applications, and for operating surgical tools. Also applies to suction systems for day care centres and clinical situations but does not apply to suction systems for laboratories or hospital dental units. Also specifies requirements for operating room pendants, columns and booms.

This Standard sets out requirements for the safety aspects, construction, testing and certification, operation and maintenance of non-flammable medical gas pipeline systems used for patient care, therapeutic, diagnostic and for operating surgical tools. Non-flammable medical gas pipeline systems include suction pipeline systems.The Standard is intended to apply to suction systems for day care centres and clinical situations. It does not apply to suction systems for laboratories or hospital dental units. The supply of oxygen from pressure swing absorption and similar techniques is not covered in this Standard.Some requirements are given for the source of supply for the pipeline system as well as those for the pipeline system itself and the terminal units and related warning systems.The Standard also gives requirements for operating room pendants, columns and booms.NOTES:1 Patient care encompasses both medical and dental applications.2 Users of this Standard should be aware that medical gas systems may be subject to regulatory requirements, e.g. from Therapeutic Goods Administration, OHS Regulatory Authorities or Plumbing Industry Commission. Compliance with this Standard may not fulfil all such requirements.

First published as part of AS CZ9-1963.Revised and redesignated AS 1169-1973.Redesignated in part as AS 1169.2-1973.Revised and redesignated AS 2896-1986.Second edition 1991.Third edition 1998.Fourth edition 2011. Originated as part of AS CZ9 1963. Previous edition AS 2896 1998. Fourth edition 2011.