1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 13257:2010Thermoplastics piping systemsfor non-pressure applications Test method for resistanceto elevated temperaturecyclingBS ISO 13257:2010 BRITISH STANDARDNational for
2、ewordThis British Standard is the UK implementation of ISO 13257:2010.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/88/1, Plastics piping for non-pressure applications.A list of organizations represented on this committee can beobtained on request to its secretary.T
3、his publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 66737 4ICS 23.040.20; 91.140.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was pub
4、lished under the authority of theStandards Policy and Strategy Committee on 31 July 2010Amendments issued since publicationDate Text affectedBS ISO 13257:2010Reference numberISO 13257:2010(E)ISO 2010INTERNATIONAL STANDARD ISO13257First edition2010-06-01Thermoplastics piping systems for non-pressure
5、applications Test method for resistance to elevated temperature cycling Systmes de canalisations thermoplastiques pour applications sans pression Mthode dessai de rsistance des cycles de temprature leve BS ISO 13257:2010ISO 13257:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. I
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10、ght office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 13257:2010ISO 13257:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization fo
11、r Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing 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
12、 right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internati
13、onal 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 International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication
14、as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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.
15、ISO 13257 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 1, Plastics pipes and fittings for soil, waste and drainage (including land drainage). BS ISO 13257:2010BS ISO 13257:2010INTERNATIONAL STANDARD ISO 13257:2010(E)
16、 ISO 2010 All rights reserved 1Thermoplastics piping systems for non-pressure applications Test method for resistance to elevated temperature cycling 1 Scope This International Standard specifies a method for testing the resistance of thermoplastics piping systems for soil and waste discharge inside
17、 buildings, application area “B”, or buried in the ground within the building structure, application areas “BD” or “UD”, to 1 500 cycles of elevated temperature cycling. NOTE This method assesses leaktightness and resistance to sagging. 2 Normative references The following referenced documents are i
18、ndispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/TS 7024, Plastics piping systems for soil and waste discharge (low and high temperatu
19、re) inside buildings Thermoplastics Recommended practice for installation 3 Terms and definitions, and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 nominal outside diameter dnspecified diameter assigned to a nominal size (DN/OD
20、 or DN/ID) NOTE It is expressed in millimetres. 3.1.2 expansion gap E distance between the bottom of a socket and the spigot of the inserted component allowing expansion of the system NOTE Adapted from ISO/TS 7024:2005, definition 3.2.4. 3.1.3 free length between fixed points LFmaximum permitted spa
21、n between support centres in an above-ground installation BS ISO 13257:2010ISO 13257:2010(E) 2 ISO 2010 All rights reserved3.2 Symbols For the purposes of this document, the symbols given in ISO/TS 7024 apply. 4 Principle A test assembly of pipes and fittings is subjected to a given pattern of therm
22、al cycling by using hot and cold water alternately for a given number of cycles during which the leaktightness of joints is verified by inspection and sagging of the pipe is checked against a given limit. It is assumed that the following test parameter is set by the referring standard: the minimum v
23、alue for the expansion gap, E, for a pipe or socket joint (see Clause 6). 5 Apparatus 5.1 Thermometer or other temperature measuring device, capable of checking conformity of the assembly inlet water temperature to the specified temperature limits (see 5.2, 5.3 and Clause 6). It is recommended that
24、the device be capable of recording and controlling the relevant temperature and time cycles (see Clause 7). 5.2 Cold water source, capable of supplying, every 4 min, the following quantities of water at (15 5) C (see 7.3): a) for Programme A, (30 0,5) l in (60 2) s; b) for Programme B, (15 0,5) l in
25、 (60 2) s. 5.3 Hot water source, capable of supplying, every 4 min, the following quantities of water at (93 2) C (see 7.3): a) for Programme A, (30 0,5) l in (60 2) s; b) for Programme B, (15 0,5) l in (60 2) s. 5.4 Plugs or other closures, to seal, temporarily, the water outlet (see 7.1 and 7.4).
26、5.5 Device, capable of measuring pipe sagging as shown in Figure 1, 2 and 3, as applicable, to an accuracy of 0,1 mm. 5.6 Supporting brackets, as appropriate, comprising anchor brackets (fixed points) capable of restraining piping components and guide brackets capable of supporting piping components
27、 without inhibiting longitudinal movement (see Clause 6 and Figures 1, 2 and 3). 6 Test assembly The test assembly shall comprise a vertical stack of pipes with fittings and two near-horizontal pipe assemblies with fittings. The assembly shall depend on the purposes for which the components are inte
28、nded as follows: a) for components intended for use in systems inside buildings (application area “B” only); b) as a test assembly supplementary to a) for components intended for use in systems buried in the ground within the building structure (application areas “BD” and “UD”). BS ISO 13257:2010ISO
29、 13257:2010(E) ISO 2010 All rights reserved 3Typical test assemblies are shown in Figure 1 (application area “B” only), Figure 2 (application areas “BD” and “UD”) and Figure 3 (application area “B” for nominal diameters, dn, smaller than 40 mm), where the positions and the types of the joint or fitt
30、ing are indicative only. For application areas “BD” and “UD”, the components shall be assembled such that that the weld lines are in the water flow. The position and the type of joint(s) to be used shall be as appropriate for the system under test (e.g. cemented joint, welded joints, lip seal joints
31、). The assembly of the joint(s) shall be carried out in accordance with the manufacturers instructions and any applicable recommended practice for installation, e.g. to avoid undue stress in the test assembly. The symbols used to specify or report on a test assembly shall conform to ISO/TS 7024. Ins
32、tallation of the test assembly shall be carried out on a firm wall or frame, using both fixed and guide brackets, with no other support of the test assembly. Anchor brackets shall be located directly on, below or behind the sockets of each pipe length, except for c) the first pipe in the near-horizo
33、ntal line from the inlet, where a possible sagging is to be measured (see Figure 1, Figure 2 or Figure 3, as applicable), and d) the pipe with nominal outside diameter, dn, smaller than 40 mm, where the distance between the brackets shall always be 400 mm. Guide brackets for near-horizontal assembli
34、es shall be placed not less than 10dnapart. Room for expansion of pipes shall be provided for all spigot ends of pipes, but not for the spigot ends of fittings, and shall be not less than the minimum value for the gap, E, as specified by the referring standard. The entry of hot water into the test a
35、ssembly shall be direct, i.e. there shall be no heat-absorbing intermediate pieces. 7 Procedure 7.1 Fill the test assembly with water, at a temperature not exceeding 20 C, to a head of 500 mm above the highest point of the centreline of the upper lateral pipe. Leave for a minimum period of 15 min an
36、d then visually check for, and record, any leaks. 7.2 If any leaks are observed, check and rectify the joint assembly (see Clause 6) and repeat the watertightness test given in 7.1. If any further leaks are observed, stop the test and report the observations in accordance with Clause 8. If no furthe
37、r leaks are observed, proceed in accordance with 7.3 to 7.5. BS ISO 13257:2010ISO 13257:2010(E) 4 ISO 2010 All rights reservedDimensions in millimetres Key ring seal socket, illustrated in accordance with ISO/TS 7024 fixed points, illustrated in accordance with ISO/TS 7024 guide brackets, illustrate
38、d in accordance with ISO/TS 7024 1 sagging measuring point 2 pipe G0: dn= 40 mm or dn= 50 mm 3 pipe G1: 75 mm u dnu 160 mm 4 pipe G2: 75 mm u dnu 160 mm aHot water. bCold water. cAngle : 85 u u 89. Other types of joints may be used as appropriate. NOTE In this test assembly, joints with elastomeric
39、ring seals are given as examples. Figure 1 Typical test assembly for elevated temperature cycling test (1 500 cycles) for piping systems inside buildings (application area “B” only) BS ISO 13257:2010ISO 13257:2010(E) ISO 2010 All rights reserved 5Dimensions in millimetres Key ring seal socket, illus
40、trated in accordance with ISO/TS 7024 fixed points, illustrated in accordance with ISO/TS 7024 guide brackets, illustrated in accordance with ISO/TS 7024 1 sagging measuring point 2 pipe G0: dn= 40 mm or dn= 50 mm 3 pipe G1: 75 mm u dnu 160 mm 4 pipe G2: 75 mm u dnu 200 mm aHot water. bCold water. c
41、Angle : 85 u u 89. Other types of joints may be used as appropriate. NOTE In this test assembly, joints with elastomeric ring seals are given as examples. Figure 2 Typical test assembly for elevated temperature cycling test (1 500 cycles) for piping systems buried in the ground within the building s
42、tructure (application area “BD” and “UD”) BS ISO 13257:2010ISO 13257:2010(E) 6 ISO 2010 All rights reservedDimensions in millimetres Key 1 sagging measuring point 2 fixed bracket 3 guide bracket aWater inlet. Figure 3 Typical test assembly for elevated temperature cycling test (1 500 cycles) for pip
43、ing systems with components with nominal outside diameter, dn, smaller than 40 mm for use inside building (application area “B”) 7.3 While monitoring the test assembly for any signs of leaks or changes of appearance, subject the test assembly to the passage of hot and cold water for 1 500 cycles of
44、either Programme A or Programme B, as applicable, as follows. In case of dispute, maintain the temperature at (20 5) C. Programme A (nominal flow rate 30 l/min), for components with nominal outside diameter, dn, equal to or greater than 40 mm: a) (30 0,5) l of water at (93 2) C, measured at the poin
45、t of entry, over a period of (60 2) s; b) rest and drain period of (60 2) s; c) (30 0,5) l of water at (15 5) C, measured at the point of entry, over a period of (60 2) s; d) rest and drain period of (60 2) s; e) return to a). BS ISO 13257:2010ISO 13257:2010(E) ISO 2010 All rights reserved 7Programm
46、e B (nominal flow rate 15 l/min), for components with nominal outside diameter, dn, smaller than 40 mm: f) (15 0,5) l of water at (93 2) C, measured at the point of entry, over a period of (60 2) s; g) rest and drain period of (60 2) s; h) (15 0,5) l of water at (15 5) C, measured at the point of en
47、try, over a period of (60 2) s; i) rest and drain period of (60 2) s; j) return to f). 7.4 On completion of the 1 500 cycles, fill the test assembly with water, at a temperature not exceeding 20 C, to a head of 500 mm above the highest point of the centreline of the upper lateral pipe. Leave for a m
48、inimum period of 15 min and then visually check for, and record, any leaks. 7.5 Check for any sagging at the midpoint between the guide brackets separated by 10dn, as shown in Figures 1 and 2, or the brackets separated by 400 mm, as shown in Figure 3, as applicable. Record any incidence of sagging g
49、reater than 0,1dn, in millimetres. 7.6 Inspect the test piece components for any changes in appearance, including any visible opening of weld lines, and record them. 8 Test report The test report shall include the following information: a) a reference to this International Standard, i.e. ISO 13257:2010, and to the referring standard; b) the complete identification of the components (e.g. fittings, pipes, assemblies, comprising the joints under tes
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