1、 ISO 2017 Gas cylinders Service life testing for cylinders and tubes of composite construction Bouteilles gaz Dure de vie des bouteilles et tubes composites TECHNICAL REPORT ISO/TR 19811 Reference number ISO/TR 19811:2017(E) First edition 2017-05 ISO/TR 19811:2017(E)ii ISO 2017 All rights reserved C
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4、ww.iso.org ISO/TR 19811:2017(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Information on existing service life test programmes 2 4.1 General . 2 4.2 Information requested . 2 4.3 Information received . 2 4.4 Service life test programmes 2 5 Comment
5、ary on similarities and differences . 2 5.1 General . 2 5.2 Requirements: Approach 1 . 2 5.3 Requirements: Approach 2 . 3 5.4 Other overviews . 3 6 Concluding remarks on feasibility of harmonization 4 Annex A (informative) A ppr oach 2: Details of t est pr oc edur e , crit eria and definitions .5 An
6、nex B (informative) Information request form 7 Bibliography 9 ISO 2017 All rights reserved iii Contents Page ISO/TR 19811:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Intern
7、ational 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 liaison with
8、 ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,
9、 Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives). Attention is drawn to the possibility that some
10、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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarati
11、ons received (see www .iso .org/ patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity a
12、ssessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: w w w . i s o .org/ iso/ foreword .html. This document was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC
13、 3, Cylinder design.iv ISO 2017 All rights reserved ISO/TR 19811:2017(E) Introduction The concept of a service life test programme originated from the United Nation Recommendation on the Transport of dangerous Goods (The Orange Book 19th Revision). The Orange Book requirement for a service life test
14、 programme for composite cylinders of more than 15 years will be incorporated into the International Regulation for Transport of Dangerous Goods by sea, air and land. In the 19th Revision of United Nation Recommendation on the Transport of dangerous Goods (The Orange Book) Note 2 of Section 6.2.2.1.
15、1 is as follows: “NOTE 2: Composite cylinders with a design life longer than 15 years shall not be filled after 15 years from the date of manufacture, unless the design has successfully passed a service life test programme. The programme shall be part of the initial design type approval and shall sp
16、ecify inspections and tests to demonstrate that cylinders manufactured accordingly remain safe to the end of their design life. The service life test programme and the results shall be approved by the competent authority of the country of approval that is responsible for the initial approval of the
17、cylinder design. The service life of a composite cylinder shall not be extended beyond its initial approved design life.” To understand what testing programmes are in use by ISO P member countries, competent authorities were asked to provide information regarding the composite cylinder approvals tha
18、t are accepted in their country and any service life test programmes currently practised. The information received from the competent authorities has been used to determine the similarities and differences in the service life test programmes in use. ISO 2017 All rights reserved v Gas cylinders Servi
19、ce life testing for cylinders and tubes of composite construction 1 Scope This document covers composite cylinders and tubes to be used under the International Regulation for Transport of dangerous Goods by sea, air and land: with a water capacity up to 3000 l; with a design life greater than 15 yea
20、rs. This document provides: information on existing service life test programmes from ISO/TC 58/SC 3 member countries; comments (initially for internal committee use only) on similarities and differences; recommendations on the feasibility of harmonization and whether it would be appropriate to deve
21、lop an ISO deliverable. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
22、nced document (including any amendments) applies. ISO 10286, Gas cylinders Terminology 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in ISO 10286 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the f
23、ollowing addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp 3.1 design life maximum life (in years) for which the composite cylinder is designed and approved in accordance with the applicable standard
24、3.2 service life number of years the cylinder is permitted to be in service Note 1 to entry: In this document for “cylinder/tube” only the term “cylinder” will be used. TECHNICAL REPORT ISO/TR 19811:2017(E) ISO 2017 All rights reserved 1 ISO/TR 19811:2017(E) 4 Information on existing service life te
25、st programmes 4.1 General The concept of a service life test programme is to ensure that an approved cylinder design, with a design life in excess of 15 years, is safe for use beyond 15 years of life. The service life cannot exceed the design life. According to of United Nations Recommendations on t
26、he Transport of Dangerous Goods, the overall programme shall be part of the initial design type approval. 4.2 Information requested To gather information, a request form and covering letter (see Annex B) were sent to the heads of governmental delegations to the sub-committee of experts on the transp
27、ort of dangerous goods of the 25 countries who are P Members of ISO TC 58 /SC 3. 4.3 Information received Information has been received from 11 countries. This information has been collated in Tables 1, 2 and 3 (see Clause 5). Service life testing on cylinders already in service has been practised i
28、n a limited number of countries with different checks, tests and requirements. 4.4 Service life test programmes Two countries have confirmed that they have service life test programmes (including one response for UN cylinders) in place. One other country has indicated additional requirements to perm
29、it the use of the cylinders beyond their 15 years service and up to the design life (not exceeding 30 years). 5 Commentary on similarities and differences 5.1 General From the information obtained, the service life test programmes are based on two different approaches: Approach 1: Some of the destru
30、ctive tests performed at the time of the type approvals, as required by the design standard, are carried out on a prescribed number of representative cylinders (see 5.2). Approach 2: Some destructive tests are carried out on a number of representative cylinders and using a statistical assessment of
31、the findings is done (see 5.3). Both approaches can also include non-destructive tests/inspections on each cylinder. Additional information received from the authorities that is of interest has also been collated (see 5.4). 5.2 Requirements: Approach 1 The requirements of the tests to be performed f
32、or the service test programmes may be different from those specified at the type approval stage in the design standard. Table 1 attempts to summarize the sampling procedure and general concepts for the test work. However, full details can be found in the original approval documents.2 ISO 2017 All ri
33、ghts reserved ISO/TR 19811:2017(E) Table 1 Sampling and testing for Approach 1 Country Standard or s p e c i f ic a t ion Cylinder sampling Tests to be performed Sampling size Sampling period Type of tests Test requirements United States DOT special permits based on: DOT CFFC or ISO 11119 series 60
34、off cylinders randomly selected for each design At 10 years 30 off cylinders At 13 or 15 years 30 off cylinders, as specified Hydraulic burst Ambient cycle Flaw Drop Differ from the type approval re- quirements: aiming to reflect potential degradation of the cylinder over the 1015 years of use Unite
35、d Kingdom HSE specs This will depend upon the manufacturing or inspection standard, as well as the use to which the cylinder is put. At 15 years This will depend upon the manufacturing or inspection standard as well as the use to which the cylinder is put. This will depend upon the manufac- turing o
36、r inspec- tion standard, as well as the use to which the cylinder is put. 5.3 Requirements: Approach 2 Test procedure and requirements using the statistical assessment method are described below. Table 2 attempts to summarize the sampling procedure and general concepts for the test work. Table 2 Sam
37、pling and testing for Approach 2 Country Standard or s p e c i f ic a t ion Cylinder sampling Tests to be performed Sampling size Sampling period Type of tests Test requirements Germany Official note of BAM “CAT“ (concept addi- tional tests) EN or ISO standard ATR national 5 randomly selected cylind
38、ers per sample (at least 6 samples i.e. 30 cylinders dur- ing service life) At design type testing; Further 2 dates for sampling during ser- vice life are determined by the compe- tent authority dependent from design life (e.g. 10 and 20 years) Two samples at each date of sampling. (1st: Slow burst
39、testing, 2nd: Load cycle testing to failure) Dependent from P-V-product; category of gas and LBB-property. Each sample shall demonstrate reliability higher than required (high mean value and low scatter including a safety margin). After 10 15 years quantifica- tion of degradation and extrapolation o
40、f results to EoL. After 20 30 years estimated EoL to be confirmed or modified. For details of the test procedure, criteria and definitions used in Approach 2, see Annex A. 5.4 Other overviews From the competent authority responses received, the following information has been collected from those cou
41、ntries who do not have service life test programmes and allow the use of non-UN composite cylinders beyond 15 years. ISO 2017 All rights reserved 3 ISO/TR 19811:2017(E) Table 3 Sampling and testing for other overviews Country Standard or s p e c i f ic a t ion Cylinder sampling Tests to be performed
42、 Sampling size Sampling period Type of tests Test require- ments Republic of Korea KGS AC 415:2014 for LPG cylinders and KGS AC 413:2014 for LPG composite cylinders 2 cylinders in accordance with KGS AC 413:2014 At design stage High temperature creep In accordance with KGS AC 413:2014 Republic of So
43、uth Africa DOT special permits and ISO standards In accordance with the relevant manu- facturing standard for unlimited design life At design stage In accordance with the rele- vant manufac- turing standard for unlimited design life In accordance with the relevant manu- facturing stand- ard for unli
44、mited design life Sweden RID/ADR regu- lation Switzerland EN 12245 ISO 11119 series UK EN 12245 ISO 11119 series 6 Concluding remarks on feasibility of harmonization Most participating ISO TC 58/SC 3 P member countries accept composite cylinders designed to ISO standards (and/or EN standards for Eur
45、ope) with a design life longer than 15 years based on the initial design type approval. In these cases there is no further service life testing programme to be undertaken, other than performing the periodic inspection and pressure test according to the national regulations (see ISO 11623). Two other
46、 approaches for specific design type approvals have been collated and grouped together as described in 5.2 and 5.3. Additionally, other approaches also exist and these are listed in 5.4. Sustainability should be considered, including the wide range of cylinder applications and design variants. In th
47、e future, if new concepts or techniques show benefit these would need to be further considered.4 ISO 2017 All rights reserved ISO/TR 19811:2017(E) Annex A (informative) A ppr oach 2: Details of t est pr oc edur e , crit eria and definitions A.1 Test procedure Dependent on the cycle fatigue sensitivi
48、ty and leak-before-break properties, a key assessment, based on a slow burst tests and/or load cycle tests is performed on a sample of at least five new cylinders per test. The quality of production is surveyed continuously (on each production batch) by statistics on results of batch tests (key test
49、) to failure. Before the end of the 15 year period, both tests are repeated on a sample of at least 5 cylinders, again on request of the owner. For variants at least the key test, depending on the cycle fatigue sensitivity, is performed. In case of a design life of more than 25 years, a second repetition of testing samples coming out of service may be requested. The appropriate service life time is estimated by comparing development of properties (degradation with respect to mean value and scatter of sample te
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