1、January 2010DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.040.20!$V“1565198www
2、.din.deDDIN EN ISO 13479Polyolefin pipes for the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipes (ISO 13479:2009)English version of DIN EN ISO 13479:2010-01Rohre aus Polyolefinen fr den Transport von Fluiden Bestimmung des Wide
3、rstandes gegen Rissfortpflanzung Prfverfahren fr langsames Risswachstum an gekerbten Rohren (Kerbprfung)(ISO 13479:2009)Englische Fassung DIN EN ISO 13479:2010-01SupersedesDIN EN ISO 13479:1997-09www.beuth.deDocument comprises 14 pagesDIN EN ISO 13479:2010-01 2 National foreword This standard has be
4、en prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids”, Subcommittee SC 5 “General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications” in collaboration with Technical Commi
5、ttee CEN/TC 155 “Plastics piping systems and ducting systems” (Secretariat: NEN, Netherlands). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Committee NA 054-05-02 AA Prfverfahren fr Rohre. The DIN Standards corres
6、ponding to the International Standards referred to in this document are as follows: ISO 161-1 DIN 8077 ISO 1167-1 DIN EN ISO 1167-1 ISO 1167-2 DIN EN ISO 1167-2 ISO 3126 DIN EN ISO 3126 Amendments This standard differs from DIN EN ISO 13479:1997-09 as follows: a) Normative references have been updat
7、ed. b) The milling cutter has now to be replaced after 500 m of notching. c) Requirements for the conditioning of the test pieces prior to any measurements have been specified. d) The type of the end caps to be used has been specified. e) The pipe series or SDR is to be indicated in the test report.
8、 Previous editions DIN EN ISO 13479: 1997-09 National Annex NA (informative) Bibliography DIN 8077, Polypropylene (PP) pipes PP-H, PP-B, PP-R, PP-RCT Dimensions DIN EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal p
9、ressure Part 1: General method DIN EN ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test pieces DIN EN ISO 3126, Plastics piping systems Plastics components Determination of dime
10、nsions EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13479 September 2009 ICS 23.040.20 Supersedes EN ISO 13479:1997English Version Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (ISO 13
11、479:2009) Tubes en polyolfines pour le transport des fluides - Dtermination de la rsistance la propagation de la fissure - Mthode dessai de la propagation lente de la fissure dun tube entaill (essai dentaille) (ISO 13479:2009)Rohre aus Polyolefinen fr den Transport von Fluiden - Bestimmung des Wider
12、standes gegen Rissfortpflanzung - Prfverfahren fr langsames Risswachstum an gekerbten Rohren (Kerbprfung) (ISO 13479:2009) This European Standard was approved by CEN on 19 August 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
13、 this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versi
14、ons (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
15、 Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STAN
16、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13479:2009: EContents Page 1 Scope4 2 Normative
17、 references4 3 Terms and definitions .4 4 Principle .4 5 Apparatus.5 6 Test piece preparation 5 6.1 General .5 6.2 Test pieces .5 6.3 Notch location and measurement of dimensions 5 6.4 Machining the notches5 6.5 Number of test pieces.7 7 Conditioning 7 8 Procedure.7 8.1 Hydrostatic-pressure testing
18、.7 8.2 Ligament thickness measurement after testing.8 9 Test report8 Annex A (normative) Ligament thicknesses10 Annex B (normative) Test-pressure levels for polyethylene12 2 DIN EN ISO 13479:2010-01 EN ISO 13479:2009 (E) Foreword 3 piping systems and ducting systems” the secretariat of which is held
19、 by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2010, and conflicting national standards shall be withdrawn at the latest by March 2010. Attention is drawn to the possibility that s
20、ome of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 13479:1997. According to the CEN/CENELEC Internal Regulations, the national standards organization
21、s of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
22、Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 13479:2009 has been approved by CEN as a EN ISO 13479:2009 without any modification. EN ISO 13479:2009 (E) DIN EN ISO 13479:2010-01 This document (EN ISO 13479:2009) has been prepared by Technic
23、al Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids” in collaboration with Technical Committee CEN/TC 155 “Plastics 1 Scope This International Standard specifies a test method for determining the resistance to slow crack growth of polyolefin pipes, expressed in t
24、erms of time to failure in a hydrostatic pressure test on a pipe with machined longitudinal notches in the outside surface. The test is applicable to pipes of wall thickness greater than 5 mm. 2 Normative references The following referenced documents are indispensable for the application of this doc
25、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 161-1, Thermoplastics pipes for the conveyance of fluids Nominal outside diameters and nominal pressures Part 1: Metric series IS
26、O 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure
27、 Part 2: Preparation of pipe test pieces ISO 3126, Plastics piping systems Plastics components Determination of dimensions ISO 6108, Double equal angle cutters with plain bore and key drive ISO 11922-1, Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric series
28、 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 161-1 and ISO 11922-1 apply. 4 Principle Lengths of pipe with four machined longitudinal external notches are subject to a hydrostatic pressure test whilst immersed in a water tank at 80 C in accordanc
29、e with ISO 1167-1 and ISO 1167-2. The time to failure or test period is recorded. NOTE It is assumed that the following test parameters are set by the standard or specification making reference to this International Standard: a) the number of test pieces, if applicable (see 6.5); b) the test pressur
30、e (see 8.1); c) the test period (see 8.1). 4 DIN EN ISO 13479:2010-01 EN ISO 13479:2009 (E) 5 Apparatus 5.1 Pipe pressure-testing equipment, as specified in ISO 1167-1. 5.2 Notch-machining equipment, i.e. a milling machine with a horizontal mandrel rigidly fixed to the bed to enable the pipe to be s
31、ecurely clamped to give a straight test piece. The mandrel shall support the pipe bore beneath and along the full length of the notch to be machined. The milling cutter mounted on a horizontal arbor shall be a 60 included-angle V-cutter conforming to ISO 6108, having a cutting rate of (0,010 0,002)
32、(mm/r)/tooth (see example). EXAMPLE A cutter with 20 teeth rotating at 700 r/min, traversed at a speed of 150 mm/min, has a cutting rate of 150/(20 700) = 0,011 (mm/r)/tooth. The milling cutter shall be carefully protected against damage. The cutter shall be subject to a running-in treatment amounti
33、ng to 10 m of notching prior to its first use for the preparation of test pieces. It shall not be used for any other material or purpose and shall be replaced after 500 m of notching. The cutter shall be checked for damage or wear after each 100 m of cutting. The cutter teeth shall be compared with
34、a new cutter by examination with a microscope using a magnification of 10 to 20 times. If there is any evidence of damage or wear it shall be replaced. 6 Test piece preparation 6.1 General Prior to any measurements the test piece shall be conditioned at (23 2) C for at least 4 h. 6.2 Test pieces Eac
35、h test piece shall comprise a length of pipe sufficient to give a minimum free length of pipe of (3dn 5) mm between the end caps, when fitted for pressure testing in accordance with ISO 1167-2, where dnis the nominal outside diameter of the pipe. For pipes with a nominal outside diameter dn 315 mm,
36、a minimum free length of (3dn 5) mm shall be used where practicable; otherwise, a minimum free length of greater than or equal to 1 000 mm shall be used. Type A end caps in accordance with ISO 1167-1 shall be used. NOTE The use of pipes less than (3dn 5) mm and notch lengths of less than the nominal
37、 outside diameter is subject to further study. 6.3 Notch location and measurement of dimensions Positions shall be marked for machining four notches equally spaced around the pipe circumference (see Figure 1). Measure the mean outside diameter, dem, of the test pipe and the wall thickness of the pip
38、e in the centre of the pipe at each notch position in accordance with ISO 3126. 6.4 Machining the notches 6.4.1 If the wall thickness of the test piece is greater than 50 mm, the material shall be machined with a slot drill of 15 mm to 20 mm diameter to leave approximately 10 mm to be removed by the
39、 V-cutter, used in accordance with 6.4.2. 6.4.2 Each notch shall be machined by climb milling (see Figure 2) to such a depth as to produce a pipe wall ligament thickness of between 0,78 and 0,82 times the minimum wall thickness, as specified in ISO 11922-1, for the diameter and pressure series of th
40、e pipe as shown in Table A.1 (see Note in this subclause). The ends of each notch shall be aligned circumferentially as shown in Figure 1 and Figure 2. 5 EN ISO 13479:2009 (E) DIN EN ISO 13479:2010-01 The length of each notch, at full depth, shall be equal to the pipe nominal outside diameter 1 mm.
41、For pipes greater than 315 mm in diameter with a free length of pipe of less than (3 dn 5) mm, the length of each notch, at full depth, shall be equal to the free length minus (500 1) mm, in accordance with 6.2. NOTE To achieve a remaining ligament within the required tolerance range, it is advisabl
42、e to aim for a remaining ligament at the maximum of the tolerance range. This is because the pipe wall can move due to the release of residual stresses, resulting in a deeper than anticipated notch. 6.4.3 Measure and record the depth of each notch and the ligament thickness, lg. NOTE 1 Measurement c
43、an be facilitated through the use of a dial gauge with a narrow angle tip mounted in a V-block. NOTE 2 When difficulty is encountered in measuring the ligament thickness of thick walled pipe, reference is made to the method specified in 8.2. 6.4.4 The test piece shall have end caps fitted, which ens
44、ure that any longitudinal internal pressure load will act fully on the pipe (e.g. as shown for the type A arrangement in ISO 1167-2). Key 1 end cap lgligament thickness: 0,78 to 0,82 times minimum ISO wall thickness, in millimetres Figure 1 Pipe test piece 6 DIN EN ISO 13479:2010-01 EN ISO 13479:200
45、9 (E) Key 1 pipe wall 2 60 double equal angle cutter h notch depth, in millimetres lnnotch length (1 dn) centred on test piece aDirection. Figure 2 Notching method 6.5 Number of test pieces Prepare a minimum of three test pieces, unless specified otherwise in the referring standard. 7 Conditioning T
46、he test pieces shall be filled with water, immersed in a water tank at 80 C and allowed to condition in accordance with the conditioning time stated in ISO 1167-1 for the pipe wall thickness. 8 Procedure 8.1 Hydrostatic-pressure testing 8.1.1 Pressurize the test piece with water in accordance with I
47、SO 1167-1 at a test temperature of 80 C, applying and maintaining the pressure specified by the referring standard. 8.1.2 Connect the test piece(s) to the pressurizing equipment and bleed off the air. After conditioning in accordance with Clause 7, progressively and smoothly apply the test pressure,
48、 in the shortest time practicable between 30 s and 1 h, depending upon the size of the test piece and the capability of the pressurizing equipment. 8.1.3 Maintain the pressure until either the test piece ruptures or the time specified by the referring standard has elapsed, whichever occurs first. Re
49、cord the time under pressure to the nearest hour. In the case of failure, record the location of the failure for each test piece. NOTE Table B.1 gives applicable pressure levels, dependent on material type and pipe series. 7 EN ISO 13479:2009 (E) DIN EN ISO 13479:2010-01 8.2 Ligament thickness measurement after testing Measurement after testing should be carried out if premature failure has occurred. The following method is recommended. On completion of the pressure test, remove the test pi
