1、 Reference number ISO/TS 18226:2006(E) ISO 2006TECHNICAL SPECIFICATION ISO/TS 18226 First edition 2006-10-01 Plastics pipes and fittings Reinforced thermoplastics pipe systems for the supply of gaseous fuels for pressures up to 4 MPa (40 bar) Tubes et raccords en matires plastiques Systmes de canali
2、sations en matire thermoplastique renforce pour la distribution de combustibles gazeux des pressions allant jusqu 4 MPa (40 bar) ISO/TS 18226:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall
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7、 www.iso.org Published in Switzerland ii ISO 2006 All rights reservedISO/TS 18226:2006(E) ISO 2006 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms, definitions and abbreviations. 2 3.1 General terms and definitions . 2 3.2 Temperature- a
8、nd pressure-related definitions. 4 3.3 Abbreviations 5 4 Performance requirements 6 4.1 Materials 6 4.2 Pipes and fittings 7 4.3 Re-qualification . 8 5 Process and quality control. 8 6 Dimensions and marking . 8 6.1 Dimensions 8 6.2 Marking 8 7 Handling, storage and installation 8 Annex A (informati
9、ve) Description of RTP Products 9 Annex B (informative) Liner material durability considerations . 12 Annex C (informative) Rationale for the elevated temperature test 14 Annex D (normative) Test procedures . 17 Annex E (normative) Qualification protocol 19 Annex F (informative) Process and quality
10、control requirements 32 Bibliography . 35 ISO/TS 18226:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carrie
11、d 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 ISO, also take part in the work. IS
12、O 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 technical committees is to prepare Internatio
13、nal 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. In other circumstances, particularly when there is an urge
14、nt market requirement for such documents, a technical committee may decide to publish other types of normative document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by mo
15、re than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/
16、TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed
17、into an International Standard or be withdrawn. Attention is drawn 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/TS 18226 was prepared by Technical Committee ISO/
18、TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels. ISO/TS 18226:2006(E) ISO 2006 All rights reserved vIntroduction A reinforced thermoplastics pipe (RTP) comprises a thermoplastics liner with contin
19、uous reinforcement and a thermoplastics outer cover. An RTP “system” comprises runs of RTP, along with the fittings required to connect them to each other and to the other components of a conventional gas transmission system. This Technical Specification is applicable for operating pressures up to 4
20、 MPa (40 bar). However it may be used for guidance in the development of RTP systems for higher operating pressures. It is intended to accommodate the upgrading of the performance of RTPs and to provide a framework within which future development can take place. RTP can be used in both new pipe syst
21、ems and in the replacement of corroded metallic pipes. The principal load-bearing components of the RTP are high-strength reinforcing members in the form of fibres, yarns, tapes or wire, which generally carry load only in tension. The reinforcing element may take the form of helically-wound yarns or
22、 fibre-reinforced tapes, in which the matrix may be a thermoplastics resin. In the most frequently employed configuration of reinforcement, dry (non-impregnated) aramid-fibre yarns are encapsulated in a tape of polymer resin or adhesive. It is also possible to employ other classes of reinforcement,
23、such as glass, carbon or textile fibres, or metallic wire or strip. The reinforcement may or may not be bonded to the liner or to the outer cover. Several types of fitting design are possible, with joints made by mechanical means, electrofusion or other methods of bonding or welding. TECHNICAL SPECI
24、FICATION ISO/TS 18226:2006(E) ISO 2006 All rights reserved 1Plastics pipes and fittings Reinforced thermoplastics pipe systems for the supply of gaseous fuels for pressures up to 4 MPa (40 bar) 1 Scope This Technical Specification describes the use of reinforced thermoplastics pipe (RTP) systems for
25、 transmission of gaseous fuels at maximum operating pressures up to and including 4 MPa (40 bar) 1) , and service temperatures in the region 50 C to 120 C, depending on the liner and cover materials. This Technical Specification relates to transmission systems in which wear and damage to the liner a
26、re restricted by limiting pigging operations to soft pigging only. The recommendations in this Technical Specification are confined to RTP and its associated in-line fittings and end-fittings. Where the other system components (elbows, tees, valves, etc.) are of conventional construction, they will
27、be governed by existing standards and codes of practice. This Technical Specification specifies a qualification testing procedure for RTP systems. It also provides a procedure for reconfirmation of the design basis that may be used for product variants where changes have been made in design, materia
28、ls or the manufacturing process. This Technical Specification provides informative annexes relating to quality assurance, product marking, handling and storage. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
29、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4433-1:1997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 1: Immersion test method ISO 4433-2:1997, Thermoplastics pipes Resistance to
30、 liquid chemicals Classification Part 2: Polyolefin pipes ISO 4433-3:1997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 3: Unplasticized poly(vinyl chloride) (PVC-U), high-impact poly(vinyl chloride) (PVC-HI) and chlorinated poly (vinyl chloride) (PVC-C) pipes ISO 4433-4:1
31、997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 4: Poly (vinylidene fluoride) (PVDF) pipes ISO 4437, Burried polyethylene (PE) pipes for the supply of gaseous fuels Metric series Specifications 1) 1 bar = 0,1 MPa = 10 5Pa. ISO/TS 18226:2006(E) 2 ISO 2006 All rights reser
32、vedISO 9080:2003, Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 12162:1995, Thermoplastics materials for pipes and fittings for pressure applications Clarification and designation Overall service
33、(design) coefficient ISO 12176-1:1998, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 1: Butt fusion ISO 14531-1, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 1: Pip
34、es ISO 14531-2, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 2: Fittings for heat-fusion jointing ISO 14531-3, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance
35、 of gaseous fuels Metric series Specifications Part 3: Fittings for mechanical jointing (including PE-X/metal transitions) ISO 14531-4, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 4: System design and
36、installation guidelines ASTM D2992-01, Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings 3 Terms, definitions and abbreviations For the purpose of this document, the following terms, definitions and ab
37、breviations apply. 3.1 General terms and definitions 3.1.1 aramid class of high-strength organic fibre “aromatic amide” EXAMPLES Twaron 2) , Kevlar 2) . 3.1.2 application-related service factor(s) multiplication factor(s) applied to the manufacturers nominal pressure rating, to allow for effects suc
38、h as cyclicity 3.1.3 ballooning inflation of the cover of an RTP, by pressurised gas, that has accumulated in the reinforcing layer 3.1.4 blistering damage in polymer materials caused by the release of absorbed gas on sudden decompression 3.1.5 carbon fibre class of high-strength graphite-based rein
39、forcing fibre 2) Twaron and Kevlar are examples of suitable products available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of these products. ISO/TS 18226:2006(E) ISO 2006 All rights reserved 33.1.6 cyclic fatigu
40、e service conditions where the internal pressure fluctuates 3.1.7 dynamic service condition involving external time-dependent loads 3.1.8 elevated temperature test constant-pressure survival test aimed at verifying that no undesirable failure mode can occur between the end of the qualification test
41、period and the end of the design life 3.1.9 end-fitting joint that occurs at either end of a run of RTP, where it is connected to other parts of the system 3.1.10 fitting coupler pipe joint 3.1.11 glass fibre high-strength inorganic reinforcement based on E-glass or S-glass 3.1.12 in-line fitting pi
42、pe joint between adjacent lengths of RTP 3.1.13 lower prediction limit 97,5 % lower prediction limit of the mean regression curve 3.1.14 minimum required strength lower prediction limit at 20C in a thermoplastics pipe at 50 years in accordance with ISO 9080:2003, rounded down in accordance with ISO
43、12162:1995 3.1.15 Principal party that initiates and pays for a project, or his agent NOTE The Principal will generally specify the technical requirements of a project. 3.1.16 principal mode only failure mode that shall be permitted in the pressure testing of RTP 3.1.17 product family group of RTP p
44、roducts having certain similarity characteristics 3.1.18 product-family representative member of a product family, chosen for full qualification ISO/TS 18226:2006(E) 4 ISO 2006 All rights reserved3.1.19 product variability factor factor, allowing for product variability, applied to the Lower Predict
45、ion Limit (LPL) pressure, to give the Manufacturers Nominal Pressure Rating (MNPR) 3.1.20 product variant member of the same product family, to which certain permissible changes have been made 3.1.21 rapid crack propagation undesirable fracture mode, in which a crack propagates along a pipeline at v
46、ery high speed 3.1.22 regression analysis statistical procedure to establish a design rating from pressure test results carried out over a period of 104 h (or a number of pressure cycles) 3.1.23 safety class classification associated with a particular probability of failure 3.1.24 stress rupture sta
47、tic fatigue failure, as a result of a period under steady stress or pressure 3.1.25 survival test constant-pressure test, to demonstrate that a product performs at least as well as the qualified product 3.2 Temperature- and pressure-related definitions 3.2.1 design temperature maximum operating temp
48、erature of the RTP system 3.2.2 FAT pressure Factory Acceptance Test pressure 3.2.3 LPL pressure pressure obtained by extrapolating the LPL to the design life 3.2.4 long-term hydrostatic pressure pressure obtained by extrapolating the mean regression curve to the design life 3.2.5 manufacturers nomi
49、nal pressure rating pressure obtained by multiplying the LPL pressure by the product variability factor 3.2.6 maximum service pressure pressure obtained by multiplying the manufacturers nominal pressure rating by application-related service factors ISO/TS 18226:2006(E) ISO 2006 All rights reserved 53.2.7 maximum operating temperature maximum temperature to which the piping is expected to be exposed during normal operational activities, including start-up
