1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 43.060.40Automotive LPG components ContainersBRITISH STANDARDBS ISO 20826:2006BS ISO 20826:2006
2、This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 49205 2Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standar
3、d cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 20826:2006. The UK participation in its preparation was entrusted to Technical Committee PVE/19, LPG containers and their associated fittings.A list of orga
4、nizations represented on PVE/19 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 20826:2006(E)INTERNATIONAL STANDARD ISO20826First edition2006-08-15Automotive LPG components Containers Composants pour vhicu
5、les au GPL Rservoirs BS ISO 20826:2006ii iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Symbols and abbreviated terms 3 5 Technical requirements 4 5.1 General provisions 4 5.2 Dimensions.4 5.3 Materials .5 5.4 Design temperature .5 5.5 Design pressure.5
6、6 Construction and workmanship.5 6.1 General requirements5 6.2 Heat Treatment.5 6.3 Tolerances 6 6.4 Openings 6 6.5 Accessories6 7 Test Programme.6 7.1 General6 7.2 Test programme for metal containers .7 7.3 Test programme for all-composite containers .8 7.4 Tests to be performed after design change
7、s9 8 Marking .10 9 Periodic inspection and re-qualification .10 9.1 Periodic inspection10 9.2 Re-qualification10 Annex A (normative) Test methods.13 Annex B (informative) Example of calculations of the pressure-retaining parts of containers28 Annex C (informative) Welding guidelines .34 Annex D (nor
8、mative) Tolerance on position of plate or ring 38 Annex E (normative) Location of test samples for metal containers 39 Annex F (normative) Test sample for mechanical tests on metal containers 42 Annex G (normative) Material test methods for all-composite containers .43 Annex H (informative) Example
9、of toric containers.45 Annex I (informative) Example of requirements for performance verification .46 Bibliography 52 BS ISO 20826:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparin
10、g International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liai
11、son with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of t
12、echnical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is d
13、rawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20826 was prepared by Technical Committee ISO/TC 22, Road vehicles. BS ISO 20826:20061Automotive LPG components
14、 Containers 1 Scope This International Standard specifies the technical requirements for the design and the testing of automotive Liquefied Petroleum Gas (LPG) containers, to be permanently attached to a motor vehicle which uses automotive LPG as a fuel. The technical requirements cover the design c
15、riteria, the requirements on construction and workmanship, the marking and re-qualification procedures. This International Standard also covers all tests, including their frequencies, to be carried out on autogas containers, during production and performance verification. Specific recommendations ar
16、e also given on the tests to be carried out when changing the design. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
17、ocument (including any amendments) applies. ISO 175, Plastics Methods of test for the determination of the effects of immersion in liquid chemicals ISO 306, Plastics Thermoplastic materials Determination of Vicat softening temperature (VST) ISO 2504, Radiography of welds and viewing conditions for f
18、ilms Utilization of recommended patterns of image quality indicators (I.Q.I.) ISO 2768-1:1989, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 4136, Destructive tests on welds in metallic materials Transverse tensile test ISO 5173,
19、 Destructive tests on welds in metallic materials Bend tests ISO 6507-1:1997, Metallic materials Vickers hardness test Part 1: Test method ISO 6721 (all parts), Plastics Determination of dynamic mechanical properties ISO 6892, Metallic materials Tensile testing at ambient temperature ISO 7438, Metal
20、lic materials Bend test ISO 7799, Metallic materials Sheet and strip 3 mm thick or less Reverse bend test ISO 9328-7, Steel flat products for pressure purposes Technical delivery conditions Part 7: Stainless steels ISO 9606 (all parts), Approval testing of welders Fusion welding BS ISO 20826:20062 I
21、SO 12097-2:1996, Road vehicles Airbag components Part 2: Testing of airbag modules ISO 15614-1:2004, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys ISO 17636, Non-de
22、structive testing of welds Radiographic testing of fusion-welded joints ASTM 3039, Fibre-resin composite ASTM D2343, Standard Test Method for Tensile Properties of Glass Fiber Strands, Yarns and Rovings Used in Reinforced Plastics ASTM D2344, Standard Test Method for Short-Beam Strength of Polymer M
23、atrix Composite Materials and Their Laminates ASTM D4018.81 Carbon (tens. Prop. Continuous filament) EN 589, Automotive fuels LPG Requirements and test methods EN 10120, Steel sheet and strip for welded gas cylinders NOTE ASTM standards are available from ASTM, 100 Barr Harbor Drive, West Conshohock
24、en, PA 19424-2959, USA. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 test pressure pressure to which the container is subjected during the test procedure 3.2 design pressure pressure on which the calculations are based 3.3 container vessel
25、 with all its permanent support(s) and attachment(s) installed, used for the storage of automotive LPG 3.4 cylindrical container container with a cylindrical shell and two dished ends, either torispherical or elliptical 3.5 metal container container made only of any suitable metal 3.6 all-composite
26、container container made only of composite materials without a metallic liner 3.7 batch maximum of 200 containers of the same type produced consecutively on the same production line BS ISO 20826:200633.8 type of container container or a group of containers where the individual container does not dif
27、fer significantly with respect to the following conditions: the manufacturer (different trade names or marks possible); the shape; the openings; the material; the welding process (if applicable); the heat treatment (if applicable); the production line; the diameter; the height (in case of a toric co
28、ntainer see Annex H); the nominal wall thickness. 3.9 longitudinal weld weld over the full length of the shell or cylindrical part of the shell, excluding welds for fittings 3.10 re-qualification activities such as examining and testing of the automotive LPG containers, carried out at defined interv
29、als 3.11 parent material material in the state after transformation necessary for the container manufacturing process 3.12 Liquefied Petroleum Gas LPG mixture of light hydrocarbons, gaseous under normal atmospheric conditions which can be liquefied by increased pressure or decreased temperature, the
30、 main components of which are propane, propene, butane and butene isomers 4 Symbols and abbreviated terms a is the calculated minimum wall thickness of the cylindrical shell in mm, b is the calculated wall thickness of the dished ends in mm, C is the shape factor, c.g is the centre of gravity, D is
31、the nominal outside diameter of the container in mm, F is the force in N, BS ISO 20826:20064 g is the gravity in m/s2, h is the height of cylindrical part of dished end in mm, H is the outside height of dished part of container end in mm, Hwis the height of the wedge in mm, Lwis the length of the ed
32、ge in mm, n is the ratio between the diameter of the mandrel of the bending test machine and the thickness of the test sample, Pbis the maximum pressure measured in the burst test in MPa, Phis the design pressure in MPa, r is the inside knuckle radius of the dished end of the standard cylindrical co
33、ntainer in mm, R is the inside dish radius of the dished end of a standard cylindrical container in mm, Reis the minimum yield stress in MPa guaranteed by the manufacturer of the container, for the parent material, Rgis the minimum tensile strength in MPa specified by the material standard, Rmis the
34、 actual tensile strength in MPa, Tgis the glass transition temperature of the resin matrix, in C, V is the velocity in km/h, z is the welding factor, HV is the Vickers hardness, PRD is the pressure relief device, PRV is the pressure relief valve, UV is Ultra-Violet. 5 Technical requirements 5.1 Gene
35、ral provisions The container for vehicles using automotive LPG in their propulsion system shall function in a correct and safe way. Any finished container, randomly chosen, shall comply with the applicable tests as prescribed in Annex A. All necessary corrosion prevention measures shall be taken to
36、protect the finished container. 5.2 Dimensions For all dimensions without indication of tolerances, general tolerances of ISO 2768-1 shall apply. BS ISO 20826:200655.3 Materials All materials compatible with LPG, may be used provided that the container complies with the applicable tests of this Inte
37、rnational Standard. For steel, EN 10120 or EN 10028-7 may be used. The container manufacturer shall ensure that all parent materials are free from defects. Container parts and filler materials shall be compatible when welded. For steel welds, ISO 15614-1 shall apply. The container manufacturer shall
38、 maintain records of the results of metallurgical and mechanical tests and analyses of parent and filler materials as described below: for metal containers: chemical cast analysis certificates and mechanical properties for the metal used for the construction of the parts subject to pressure; for all
39、-composite containers: results of tests as prescribed in Annex G. The container manufacturer shall maintain a system to trace all parent materials for parts subject to pressure. 5.4 Design temperature The minimum design temperature shall be 20 C. The maximum design temperature shall be +65 C. For ex
40、tremely low operating temperature, a minimum design temperature of 40 C shall be applied. This lower design temperature shall be indicated on the marking plate. The manufacturer shall demonstrate that the material from which the pressure-containing parts of the container are constructed shall have p
41、roperties suitable for the range of temperatures down to 40 C. 5.5 Design pressure The design pressure of the container shall be 3,0 MPa. 6 Construction and workmanship 6.1 General requirements The manufacturer shall be able to demonstrate that its quality control system ensures that the containers
42、produced meet the requirements of this International Standard. The manufacturer shall maintain records of the processes, procedures, inspections and qualification that are carried out during production. It is recommended that the out-of-roundness of the cylindrical shell of the metal container is no
43、t more than the difference between the maximum and minimum outside diameter of the same cross-section and is not more than 1 % of the average of those diameters. Unless otherwise shown on the construction drawing, it is recommended that the maximum deviation of the cylindrical part of the shell from
44、 a straight line (straightness) does not exceed 0,3 % of the length of the cylindrical part. 6.2 Heat treatment The container manufacturer shall maintain records of the heat treatment procedures on container parts and finished containers, either completely or localized, necessary to comply with the
45、requirements of this International Standard. BS ISO 20826:20066 6.3 Tolerances 6.3.1 Capacity The actual water capacity of the container, shall have a tolerance of 0 % to +3 % compared to the figure shown on the marking plate. 6.3.2 Position The tolerance on the position of the valve boss/plate in t
46、he container shall be plus or minus 1 degree in two directions, transverse and twist (see Annex D). 6.4 Openings Openings shall be provided for filling, off-take, pressure relief and level indication. Openings for pressure relief valves shall be in the vapour phase, when the container is in its norm
47、al mounting position. Openings shall be taper threaded or flanged. Openings may also be provided for power supply, pumps, etc. Openings for valves may be either separate or combined. An O-ring may be fitted either in the ring or in the flange, see Figure C.4. Internal vapour off-take pipework shall
48、be adequately supported and shall end in the vapour space of the container as high as possible above the maximum filling level. Internal liquid off-take pipework shall end as low as possible in the container. 6.5 Accessories Where fitted, the marking plate shall be fixed permanently on the container
49、 shell or end. Corrosion prevention measures shall be taken. The accessories in and on the container shall be fitted under the responsibility of the holder of the bonfire test approval certificate (see I.5). It shall be possible to securely mount a gas-tight housing or other protective device over the container accessories. The support(s) shall be manufactured and attached to the container body in such a way as: not to cause dangerous concentrations of stresse
