1、June 2016 English price group 9No part of this translation 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!%Vdh“2516569www.din.deDIN
2、EN ISO 9969Thermoplastics pipes Determination of ring stiffness (ISO 9969:2016);English version EN ISO 9969:2016,English translation of DIN EN ISO 9969:2016-06Thermoplastische Rohre Bestimmung der Ringsteifigkeit (ISO 9969:2016);Englische Fassung EN ISO 9969:2016,Englische bersetzung von DIN EN ISO
3、9969:2016-06Tubes en matires thermoplastiques Dtermination de la rigidit annulaire (ISO 9969:2016);Version anglaise EN ISO 9969:2016,Traduction anglaise de DIN EN ISO 9969:2016-06SupersedesDIN EN ISO 9969:2008-03www.beuth.deDocument comprises 14 pagesDTranslation by DIN-Sprachendienst.In case of dou
4、bt, the German-language original shall be considered authoritative.06.16DIN EN ISO 9969:2016-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 9969:2016) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fl
5、uids” in collaboration with Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems” (Secretariat: NEN, Netherlands). The responsible German body involved in its preparation was DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-05-02 AA
6、Prfverfahren fr Rohre. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 3126 DIN EN ISO 3126 Amendments This standard differs from DIN EN ISO 9969:2008-03 as follows: a) the standard has been editorially revised ; ;b) calculation of the pre
7、-load force according to Formula (2) is now to be carried out using the inside diameter of the pipe test piece instead of the nominal pipe diameter. Previous editions DIN EN ISO 9969: 1995-08, 2008-03 National Annex NA (informative) Bibliography DIN EN ISO 3126, Plastics piping systems Plastics comp
8、onents Determination of dimensions EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9969 January 2016 ICS 23.040.20 Supersedes EN ISO 9969:2007English Version Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2016) Tubes en matires thermoplastiques - Dtermination de la rigidit
9、 annulaire (ISO 9969:2016) Thermoplastische Rohre - Bestimmung der Ringsteifigkeit (ISO 9969:2016) This European Standard was approved by CEN on 7 November 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
10、 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, F
11、rench, 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgar
12、ia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turk
13、ey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. R
14、ef. No. EN ISO 9969:2016 EContents Foreword .41 Scope . 52 Normative references 53 Symbols 54 Principle 55 Apparatus . 66 Test pieces . 76.1 Marking and number of test pieces . 76.2 Length of test pieces . 76.3 Inside diameter of test piece(s) 86.4 Age of test pieces . 87 Conditioning 98 Procedure.
15、99 Calculation of ring stiffness . 1110 Test report . 12PageEuropean foreword .32 EN ISO 9969:2016 (E) DIN EN ISO 9969:2016-06European foreword This document (EN ISO 9969:2016) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“ in co
16、llaboration with Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems” the secretariat of which is held 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 July 2016, an
17、d conflicting national standards shall be withdrawn at the latest by July 2016. Attention is drawn to the possibility that some 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 d
18、ocument supersedes EN ISO 9969:2007. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugosl
19、av Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 9969:2016 has b
20、een approved by CEN as EN ISO 9969:2016 without any modification. 3EN ISO 9969:2016 (E)DIN EN ISO 9969:2016-06ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is
21、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 ISO, also take part
22、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, Part 1. In particular
23、 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 of the elements of this do
24、cument 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 declarations received (see www.iso.
25、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 meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO
26、principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valv
27、es of plastic materials and their accessories Test methods and basic specifications .This third edition cancels and replaces the second edition (ISO 9969:2007), which has been technically revised.4 EN ISO 9969:2016 (E) DIN EN ISO 9969:2016-061 ScopeThis International Standard specifies a test method
28、 for determining the ring stiffness of thermoplastics pipes having a circular cross section.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies.
29、 For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3126, Plastics piping systems Plastics components Determination of dimensions3 SymbolsFor the purposes of this document, the following symbols apply.Unitsdnnominal diameter of pipe mmdiinsid
30、e diameter of the test piece of pipe mmecconstruction height mmF loading force kNF0pre-load force NL length of test piece mmp pitch of ribs or windings mmS ring stiffness kN/m2y vertical deflection mm4 PrincipleThe ring stiffness is determined by measuring the force and the deflection while deflecti
31、ng the pipe at a constant deflection speed.A cut length of pipe supported horizontally is compressed vertically between two parallel flat plates moved at a constant speed that is dependent upon the diameter of the pipe.A plot of force versus deflection is generated. The ring stiffness is calculated
32、as a function of the force necessary to produce a 3 % diametric deflection of the pipe.NOTE It is assumed that the test temperature is set by the referring standard, if appropriate (see 8.1).5EN ISO 9969:2016 (E)DIN EN ISO 9969:2016-065 Apparatus5.1 Compressive testing machine, capable of a constant
33、 rate of crosshead movement, via a pair of parallel plates (5.2), as appropriate to the nominal diameter of the pipe in conformance with Table 1, with sufficient force and travel to produce the specified diametric deflection (see Clause 8).Table 1 Deflection speedsInside diameter, di, of the test pi
34、ece of pipe mmDeflection speed mm/mindi 100 2 0,1100 710 0,03 di 5 %dishall be determined in accordance with 6.3.5.2 A pair of hard and rigid plates, through which the testing machine can apply the necessary force, F, to the test piece.The plates shall have flat, smooth and clean surfaces for contac
35、t with the test piece.The stiffness and hardness of each plate shall be sufficient to prevent bending or deformation to an extent that would affect the results.The length of each plate shall be at least equal to the length of the test piece. The width of each plate shall not be less than the width o
36、f the contact surface with the test piece while under load plus 25 mm.5.3 Dimensional measuring devices, capable of determining individual values for the length of a test piece (see 6.2.2 and 6.2.3) to with an accuracy of 1 mm, the inside diameter of a test piece to with an accuracy of 0,5 %, and th
37、e change of inside diameter of a test piece in the direction of loading with an accuracy of 0,1 mm or 1 % of the deflection, whichever is the greater.An example of a device for measuring the inside diameter of corrugated pipe is shown in Figure 1.Figure 1 Example of device for measuring inside diame
38、ter of corrugated pipe5.4 Force measuring device, capable of determining with an accuracy of 2 % the force necessary to produce a deflection of up to 4 % of the test piece.6 EN ISO 9969:2016 (E) DIN EN ISO 9969:2016-066 Test pieces6.1 Marking and number of test piecesThe pipe of which the ring stiff
39、ness is to be determined shall be marked on its outside with a line along one generatrix over its entire length. Three test pieces, a, b and c, respectively, shall be taken from this marked pipe such that the ends of the test pieces are perpendicular to the pipe axis and their lengths conform to 6.2
40、.6.2 Length of test pieces6.2.1 The length of each test piece shall be determined by calculating the arithmetic average of three to six measurements of length equally spaced around the perimeter of the pipe, as given in Table 2. The length of each test piece shall conform to 6.2.2, 6.2.3, 6.2.4 or 6
41、.2.5, as applicable.Each of the three to six length measurements shall be determined to within 1 mm.For each individual test piece, the smallest of the three to six measurements shall not be less than 0,9 times the largest length measurement.Table 2 Number of length measurementsNominal diameter, dn,
42、 of pipe mmNumber of length measurementsdn 200 3200 dn 500 4dn 500 66.2.2 For pipes that have nominal diameters equal to or less than 1 500 mm, the average length of the test pieces shall be (300 10) mm.6.2.3 For pipes that have nominal diameters larger than 1 500 mm, the average length of the test
43、pieces in millimetres shall be at least 0,2 dn.6.2.4 Structured wall pipes with perpendicular ribs, corrugations or other regular structures shall be cut such that each test piece contains a whole number of ribs, corrugations or other structures. The cuts shall be made at the mid point between the r
44、ibs, corrugations or other structures.The length of the test pieces shall be the minimum whole number of ribs, corrugations or other structures resulting in a length of 290 mm or greater or, for pipes greater than 1 500 mm, 0,2 dnor greater.See Figure 2.7EN ISO 9969:2016 (E)DIN EN ISO 9969:2016-06Ke
45、yL length of test piecep pitchFigure 2 Test piece cut out of perpendicularly ribbed pipe6.2.5 Structured wall pipes with helical ribs, corrugations or other regular structures shall be cut such that the length of the test pieces is equal to the inside diameter 20 mm but not less than 290 mm nor grea
46、ter than 1 000 mm.6.3 Inside diameter of test piece(s)The inside diameters, dia, diband dic, of the respective test pieces, a, b and c (see 6.1), shall be determined either asa) the arithmetic average of four or more measurements in accordance with ISO 3126 of one cross section at mid-length, where
47、each measurement shall be determined with an accuracy of 0,5 %, orb) measured at mid-length cross-section by means of a tape in accordance with ISO 3126.The calculated or measured average inside diameter for each test piece, a, b and c, shall be recorded, as dia, diband dic, respectively.The average
48、 value, di, of these three calculated values shall be calculated using Formula (1):ddddiia ib ic3=+(1)6.4 Age of test piecesAt the start of testing in accordance with Clause 8, the age of the test pieces shall be at least 24 h.For type testing, and in case of dispute, the age of the test pieces shal
49、l be (21 2) days.8 EN ISO 9969:2016 (E) DIN EN ISO 9969:2016-067 ConditioningThe test pieces shall be conditioned in air at the test temperature (see 8.1) for at least 24 h immediately prior to testing in accordance with Clause 8.8 Procedure8.1 Unless otherwise specified in the referring standard, carry out the following procedure at (23 2) C or, in countries where 27 C is used as standard laboratory temperature, at (27 2) C.In case of dispute, (23 2) C shall be used.NOTE It is probable that the test temperature
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