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1、AS 46312005 Australian Standard Limited flexibility connectors for gas AS 46312005 This Australian Standard was prepared by Committee AG-011, Gas Components and Industrial Equipment. It was approved on behalf of the Council of Standards Australia on 15 April 2005. This Standard was published on 8 Ju
2、ne 2005. The following are represented on Committee AG-011: AGA Certification Services Appliance and Component Testing Energy Networks Association Engineers Australia Gas Appliance Manufacturers Association of Australia Gas Appliances and Services Association Gas Technical Regulators Committee LPG A
3、ustralia Major Industrial Gas Installations Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be
4、issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about Standards can be found by visiting the Standards W
5、eb Shop at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisions and amendments published each month. Australian Stand
6、ardsTM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop. We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any ap
7、parent inaccuracies or ambiguities. Contact us via email at mailstandards.org.au, or write to the Chief Executive, Standards Australia, GPO Box 5420, Sydney, NSW 2001. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 20 May 2009 AS 46312005 Australian Standard Limited flexibility connectors for gas Orig
8、inated as AG 2161993. Previous edition 1998. Republished and designated AS 46312005. COPYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission o
9、f the publisher. Published by Standards Australia, GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0 7337 6749 4 AS 46312005 2 PREFACE This Standard was reviewed by the Standards Australia Committee, AG-011, Gas Components and Industrial Equipment, to supersede AG 2161998, Approval requirements for l
10、imited flexibility connectors for gas. The Standard is republished without technical alterations. The objective of this Standard is to provide manufacturers, designers, regulatory authorities, testing laboratories and similar organizations with uniform minimum requirements for the safety, performanc
11、e and use of limited flexibility connectors for gas. This Standard should not be regarded as a design specification or as an instruction manual. In its preparation, consideration has been given to (a) continuity of satisfactory operation; (b) the prevention of fire hazards, and explosions; (c) the p
12、revention of injury to persons or property; (d) gas rules and regulations now in force; and (e) relevant International Standards. The terms normative and informative have been used in this Standard to define the application of the appendix to which they apply. A normative appendix is an integral par
13、t of a Standard, whereas an informative appendix is only for information and guidance. Statements expressed in mandatory terms in notes to tables and figures are deemed to be requirements of this Standard. 3 AS 46312005 CONTENTS Page SECTION 1 SCOPE AND DEFINITIONS 1.1 SCOPE 4 1.2 DEFINITIONS 4 SECT
14、ION 2 DESIGN AND CONSTRUCTION 2.1 MATERIALS 6 2.2 CONSTRUCTION.6 2.3 DIMENSIONS.7 2.4 MARKINGS7 SECTION 3 PERFORMANCE REQUIREMENTS 3.1 BURST PRESSURE8 3.2 PROOF PRESSURE8 3.3 FLOW CAPACITY.8 3.4 RESISTANCE TO KINKING .8 3.5 RESISTANCE TO PULL8 3.6 RESISTANCE TO CRUSHING8 3.7 RESISTANCE TO TEMPERATUR
15、E9 3.8 RESISTANCE TO BURNING 9 3.9 RESISTANCE TO GAS9 3.10 FLEXIBILITY.9 APPENDICES A FIGURES A1A5 10 B METHODS OF TEST 16 C LIST OF REFERENCED DOCUMENTS . 31 AS 46312005 4 Standards Australia .au STANDARDS AUSTRALIA Australian Standard Limited flexibility connectors for gas S E C T I O N 1 S C O P
16、E A N D D E F I N I T I O N S 1.1 SCOPE These requirements apply to limited flexibility connectors for use on natural gas (NG), simulated natural gas (SNG), town gas (TG), tempered liquefied petroleum gas (TLP) and liquefied petroleum gas (LPG). Requirements for a quick-connect device incorporated i
17、n a metal connector are published as AS 4627. 1.2 DEFINITIONS 1.2.1 Authority Means the authority having jurisdiction or such authority as delegated. (Technical Regulator). 1.2.2 Certified Assessed by a Certifying Body, and having a certificate number to demonstrate compliance with a Standard. 1.2.3
18、 Certifying body A body acceptable to the Technical Regulator that provides assurance of compliance of appliances and components with nominated standards or other accepted safety criteria. 1.2.4 Gas A combustible fuel gas which may be one of the following: 1.2.4.1 Natural gas (NG) A hydrocarbon gas,
19、 consisting mainly of methane. 1.2.4.2 Simulated natural gas (SNG) A gas comprising a mixture of LPG and air, in the approximate proportions of 55% gas and 45% air for commercial propane. 1.2.4.3 Town gas (TG) A gas manufactured from coal or petroleum feedstocks. 1.2.4.4 Tempered liquefied petroleum
20、 gas (TLP) A gas comprising a mixture of LPG and air, in the approximate proportions of 27% gas and 73% air for commercial propane. 1.2.4.5 Liquefied petroleum gas (LPG) A gas composed predominantly of any of the following hydrocarbons, or any combination of them in the vapour phase; propane, propen
21、e (propylene), butane, butene (butylene). 1.2.5 Gas, high pressure Gas supplied at pressures of over 200 kPa and not exceeding 1050 kPa. 5 AS 46312005 .au Standards Australia 1.2.6 Gas, low pressure Gas supplied at pressures of 7 kPa or less. 1.2.7 Gas, medium pressure Gas supplied at pressures of o
22、ver 7 kPa and up to 200 kPa. 1.2.8 Limited flexibility connector An assembly of semi-rigid pipe with permanently attached end fittings that is designed for infrequent movement. 1.2.9 Quick-connect device A two-part mating plug and socket assembly for connecting an appliance to a gas supply without t
23、he use of tools. 1.2.10 Rated working pressure The maximum allowable inlet pressure specified by the manufacturer. 1.2.11 Technical regulator The Government appointed person, body or authority that has jurisdiction over gas safety legislation (or other entity authorized by that person, body or autho
24、rity). AS 46312005 6 Standards Australia .au S E C T I O N 2 D E S I G N A N D C O N S T R U C T I O N 2.1 MATERIALS 2.1.1 Continuity of satisfactory operation Materials used in the construction shall be such that continuity of satisfactory operation can be expected during normal usage within the ma
25、nufacturers specification. 2.1.2 Suitability of materials for conditions of use Materials and finishes, including dressings and lubricants, used in the construction, shall be suitable for the conditions of use (e.g. corrosion, temperature, handling, etc.). 2.1.3 Materials in contact with gas Materia
26、ls in contact with the gas, including lubricants, dressings and jointing compounds, shall be suitable for use with all gases. 2.1.4 Melting point of materials All gas carrying parts of limited flexibility connectors shall be made of materials with a melting point not less than 430C. 2.1.5 Brass part
27、s Brass parts shall be resistant to stress corrosion cracking when tested in accordance with AS 2136. 2.1.6 Component parts materials selected to appropriate Standards Alloys used for component parts shall be selected from appropriate Australian Standards or their equivalent. 2.2 CONSTRUCTION 2.2.1
28、Continuity of satisfactory operation Construction shall ensure continued safe operation during usage within the manufacturers specification. 2.2.2 Castings and hot pressings Constituent parts shall be free from sharp edges that may cause damage or injury. 2.2.3 Construction of parts not covered by t
29、his Standard The construction of parts not covered by this Standard shall be in accordance with reasonable concepts of safety, substantiality and durability. The general assembly shall be of a neat and workmanlike character with all parts well fitted. 2.2.4 End fittings End fittings of limited flexi
30、bility connectors shall (a) be attached in such a manner that they cannot be removed without destroying the metal connector; (b) not be attached by means of soft soldering; and (c) be screwed or flanged, or shall be part of the quick-connect device or union. 7 AS 46312005 .au Standards Australia 2.2
31、.5 Screwed end fittings with spanner flats Screwed end fittings shall be provided with spanner flats. The design of these fittings shall be such that the assembly can be secured at one end without the necessity of turning the metal connector relative to its mating piece. 2.2.6 Screwed end fittings t
32、o AS 1722.1 Screwed end fittings that are not part of a union and which are intended for connection to gas pipe or the gas appliance shall conform to AS 1722.1 or equivalent. External threads shall be taper. Internal threads shall be taper for rated working pressures over 100 kPa. 2.2.7 Quick connec
33、t device Quick-connect device end fittings shall meet the requirements of AS 4627. 2.3 DIMENSIONS 2.3.1 Bore dimensions The bore of a limited flexibility connector shall conform to the following dimensions. TABLE 2.1 NOMINAL BORE DIMENSIONS Nominal bore mm Tolerance mm Up to 20.0 0.75 25.0 and above
34、 1.50 2.4 MARKINGS 2.4.1 General Limited flexibility connectors shall be clearly and durably marked with the following information: (a) Manufacturers name or trademark. (b) Model designation. (c) Rated working pressure if it exceeds 7 kPa. (d) Nominal bore in millimetres. (e) Year of manufacture. (f
35、) Compliance number. Markings may be inscribed on a durable label or sleeve that shall be securely fixed to the connector. AS 46312005 8 Standards Australia .au S E C T I O N 3 P E R F O R M A N C E R E Q U I R E M E N T S 3.1 BURST PRESSURE 3.1.1 Burst or failure resistance at pressure Limited flex
36、ibility connectors shall withstand a minimum hydrostatic pressure for 1 min of four times the rated working pressure without any indication of burst or failure. 3.2 PROOF PRESSURE 3.2.1 Leak tightness at pressure After being subjected to the hydrostatic pressure of Clause 3.1.1 limited flexibility c
37、onnectors shall show no sign of leakage or any other indication of failure when subjected to an internal air pressure of twice the rated working pressure. 3.3 FLOW CAPACITY 3.3.1 Pressure drop The pressure drop through a limited flexibility connector with a length between end fittings of 1 m shall n
38、ot exceed 50 Pa when a flow rate of air at S.T.P. (15C and 101.325 kPa), as shown in Table B1, is passed through it. 3.4 RESISTANCE TO KINKING 3.4.1 Pressure drop due to kinking The pressure drop through a limited flexibility connector that is looped and which has a 5 kg mass suspended from it and t
39、hrough which an air flow rate as specified in Clause 3.3.1 is passed shall not be more than 60 Pa above the pressure drop determined for the same connector and the same flow rate, with the connector straight and before it was looped. 3.4.2 Flow rate after test After the kinking test of Clause 3.4.1
40、and with the same flow rate the pressure drop through the limited flexibility connector shall not be more than 10 Pa above the value determined prior to the test. 3.5 RESISTANCE TO PULL 3.5.1 Resistance to force along longitudinal axis Limited flexibility connectors shall be subjected to a force in
41、Newtons of 60 times the nominal bore in mm, or 600 N, whichever is the greater, applied along the longitudinal axis for 10 min. After the force is removed, limited flexibility connectors shall meet the requirements of Clause 3.2.1. 3.6 RESISTANCE TO CRUSHING 3.6.1 Pressure drop after crushing force
42、applied The pressure drop through a limited flexibility connector which is being subjected to a force of 340 N applied over a length of 25 mm for 1 min and through which an air flow rate as specified in Clause 3.3.1 is passed, shall not be more than 30 Pa above the pressure drop determined for the s
43、ame connector and the same flow rate before it was subjected to the crushing force. 9 AS 46312005 .au Standards Australia 3.6.2 Gas tightness after crushing After the crushing test of Clause 3.6.1 the limited flexibility connector shall remain gas tight in accordance with Clause 3.2.1. 3.7 RESISTANC
44、E TO TEMPERATURE 3.7.1 Gas tightness after exposure to high temperature After being subjected for 24 h to a temperature of 125C or that specified by the manufacturer, whichever is the higher, limited flexibility connector assemblies shall show no sign of leakage or any other indication of failure, u
45、p to the rated working pressure, while the connector is maintained at temperature. 3.8 RESISTANCE TO BURNING 3.8.1 No penetration of connector wall Non-metallic exteriors or coatings shall not continue to burn sufficiently to penetrate the wall of the connector after an ignition source has been remo
46、ved when tested as specified in AS 1180.10B. 3.9 RESISTANCE TO GAS 3.9.1 No deterioration after exposure to gases Limited flexibility connectors shall be resistant to deterioration from all fuel gases. 3.10 FLEXIBILITY 3.10.1 Cycling test through arc of 180 Limited flexibility connectors shall show
47、no sign of leakage when tested to Clause 3.2.1, and no indication of failure, after being subjected to 30 cycles through an arc of +90 to 90, i.e. each cycle is through an arc of 180 and back again to the starting position. 3.10.2 Cycling test with pull force Limited flexibility connectors shall sho
48、w no sign of leakage when tested to Clause 3.2.1, and no indication of failure, when supported rigidly at one end and subjected to 30 pulls of a force of 30 N at 90 to the other end. AS 46312005 10 Standards Australia .au APPENDIX A FIGURES A1A5 (Normative) Figure Description A1 LEAKAGE TEST RIG A2
49、BUBBLE LEAK DETECTOR A3 KINKING TEST RIG A4 FLEXIBILITY TEST RIG A5 BENDING TEST RIG 11 AS 46312005 .au Standards Australia IV Air inlet valve AR Adjustable regulator ABV Air bypass valve LD Leak detector LDB Leak detector bypass LDI Leak detector inlet valve LDO Leak detector outlet valve PG Pressure gauge VIInle