DIN EN 1447-2011 Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of long-term resistance to internal pressure German version EN 1447 2.pdf

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1、January 2011 Translation by DIN-Sprachendienst.English price group 8No 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

2、 23.040.20!$m,A“1740930www.din.deDDIN EN 1447Plastics piping systems Glass-reinforced thermosetting plastics (GRP) pipes Determination of long-term resistance to internal pressure (includesAmendment A1:2010)English translation of DIN EN 1447:2011-01Kunststoff-Rohrleitungssysteme Rohre aus glasfaserv

3、erstrkten duroplastischen Kunststoffen (GFK) Bestimmung der Langzeit-Widerstandsfhigkeit gegen Innendruck (enthlt nderungA1:2010)Englische bersetzung von DIN EN 1447:2011-01Systmes de canalisations en plastiques Tubes en plastiques thermodurcissables renforcs de verre (PRV) Dtermination de la rsista

4、nce long terme la pression interne (Amendement A1:2010inclus)Traduction anglaise de DIN EN 1447:2011-01SupersedesDIN EN 1447:2009-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1201.11 DIN EN 1447:2011-01 A comma is used as the

5、decimal marker. National foreword This standard has been prepared by Technical Committee 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

6、), Working Committee NA 054-05-09 AA Rohre und Rohrleitungsteile aus Reaktions-harzformstoffen. This document includes EN 1477:2009 and Amendment 1:2010. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Amendments This standard differs from DIN EN

7、1447:2009-07 as follows: a) the reference to EN 703 has been replaced by a reference to ISO 10928. Previous editions DIN EN 1447: 1996-12, 2009-07 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1447:2009+A1 October 2010 ICS 23.040.20 Supersedes EN 1447:2009 English Version Plastics piping sy

8、stems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of long-term resistance to internal pressure Systmes de canalisations en plastiques - Tubes en plastiques thermodurcissables renforcs de verre (PRV) - Dtermination de la rsistance long terme la pression interne Kunststoff-Ro

9、hrleitungssysteme - Rohre aus glasfaserverstrkten duroplastischen Kunststoffen (GFK) - Bestimmung der Langzeit-Widerstandsfhigkeit gegen Innendruck This European Standard was approved by CEN on 10 February 2009 and includes Amendment 1 approved by CEN on 14 September 2010. CEN members are bound to c

10、omply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving 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 Mana

11、gement Centre or to any CEN member. This European Standard exists in three official versions (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

12、the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roma

13、nia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved

14、worldwide for CEN national Members. Ref. No. EN 1447:2009+A1:2010: EEN 1447:2009+A1:2010 (E) 2 Contents Page Foreword 3Introduction . 41 Scope 52 Normative references . 53 Definitions 54 Principle . 65 Apparatus. 66 Test pieces . 86.1 Number 86.2 Free length 86.3 Cutting . 87 Conditioning 88 Procedu

15、re. 89 Detection of failure 99.1 General 99.2 Detection methods . 99.2.1 Drop of pressure 99.2.2 Loss of test liquid 99.2.3 Drop in electrical resistance . 910 Test report 9DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 3 Foreword This document (EN 1447:2009+A1:2010) has been prepared by Technical Com

16、mittee 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 April 2011 and conflicting national standa

17、rds shall be withdrawn at the latest by April 2011. 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 document includes Amendment 1

18、, approved by CEN on 2010-09-14. This document supersedes !EN 1447:2009“. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. The main modifications are: Correction of the valid failure zone limits and the use and reporting of data outside the valid

19、zone. The material-dependent parameters and/or performance requirements are incorporated in the referring standard. This standard is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting systems. According to the CEN/CENELEC Internal Regu

20、lations, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma

21、lta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 4 Introduction This standard describes a method for determining the long-term resistance to internal pressure of glass-reinforced t

22、hermosetting plastics (GRP) pipes. It is a method which uses the following conditions: water as the reference liquid inside the test piece; water or air as the environment outside the test piece. The method can be used for tests at different temperatures. It should be noted that, for a given tempera

23、ture, the results obtained can differ depending on the end loading conditions and whether the external environment is water or air. The method described in this standard differs from those in some other similar standards, in the following details: the failure criteria and the detection of failure; t

24、he strain in the longitudinal and circumferential directions may be measured during the test; the test pressure is maintained constant. !This method may be used to obtain data to establish internal pressure versus time-to-failure relationships at different temperatures. The procedures for establishi

25、ng the relationships are not within the scope of this standard. For such purposes attention is drawn to ISO 10928.“ DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 5 1 Scope This European Standard specifies a method for determining the time to failure of glass-reinforced thermosetting plastics (GRP) pi

26、pes under internal hydrostatic pressure at a specified temperature. The external environment can be air or water. NOTE For other internal or external environments the referring standard should specify any additional requirement. 2 Normative references The following referenced documents are indispens

27、able 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 10928, Plastics piping systems Glass-reinforced thermosetting plastics (GRP) pipes and fitti

28、ngs Methods for regression analysis and their use“ 3 Definitions For the purposes of this document, the following definitions apply: 3.1 failure continuous loss of pressure resulting from the passage of the test liquid through the wall of the test piece under test NOTE See 9.1. 3.2 bursting failure

29、by rupture of the pipe wall with immediate loss of test liquid and drop of pressure NOTE See 9.1 and 9.2.2. 3.3 leaking failure by loss of the pressurizing liquid through the pipe wall to an extent detectable visually and/or by a continuous drop in pressure NOTE See 9.1, 9.2.1 and 9.2.2. 3.4 weeping

30、 failure by passage of the pressurizing liquid through the pipe wall to an extent detectable visually or electronically NOTE See 9.1 and 9.2.3. DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 6 4 Principle A cut length of pipe at the required temperature is subjected to a specified internal hydrostatic

31、 pressure to cause a state of stress in the pipe wall which depends upon the loading conditions, i.e. with or without the effects of end thrust being carried by the pipe wall. The results of tests at different end loading conditions will be different even for the same pipe. Water or air may be used

32、as the environment outside of the test piece. The test samples are held at the test pressure until failure occurs. Typically the time to failure is longer at lower pressures (stresses). In general, a series of tests are conducted over various failure times and the results obtained analysed in accord

33、ance with !ISO 10928“ to establish a long term value. The number of tests required, the appropriate time intervals and the time at which a value is established (time to failure) are given in the referring standard. NOTE It is assumed that the following test parameters are set by the standard making

34、reference to this standard: a) whether or not the test piece is to be loaded by the hydrostatic end thrust while under pressure (see 5.2); b) free length, L, of the test piece (see 6.2); c) number of test pieces (see 6.1); d) test temperature and its tolerance (see 8.1); e) if and what strain measur

35、ements are required (see 8.2); f) external environmental fluid, i.e. water or air (see 8.3) or other environment (see Note to Clause 1); g) internal environmental fluid, if not water or a test liquid for the purposes of 5.7 and 9.2.3 (see Note to Clause 1). 5 Apparatus 5.1 Dimensional measurement de

36、vices, capable of determining the dimensions (length, diameters, wall thickness) to an accuracy of within 1,0 %. 5.2 End sealing devices for the test piece, capable of inducing the specified state of stress, i.e. with or without hydrostatic end thrust (see Figure 1). DIN EN 1447:2011-01 EN 1447:2009

37、+A1:2010 (E) 7 Type 1 Type 2 Type 3 Key Type 1 testing with end thrust Type 2 testing without end thrust, external seals Type 3 testing without end thrust, internal seals 1 valid failure zone 2 end fixture influence zone, equal to 3,3(DN e)0,5 e wall thickness L free length between end fixturesFigur

38、e 1 Typical arrangements for pressure testing of pipes 5.3 Test piece support(s), as necessary to minimize deformation of the test piece due to its own weight. Such support(s) shall not constrain the test piece circumferentially or longitudinally. 5.4 Container for water, if tested with water as the

39、 external environment (see 8.3), equipped so that the specified temperature can be maintained uniformly throughout the liquid. NOTE This can require circulation. 5.5 Pressurizing system, capable of applying the pressure to the liquid in the test piece in such a way as to avoid entrapment of air. The

40、 system shall be capable of maintaining the pressure within the limits detailed in 8.4 for the duration of the test. NOTE 1 The pressure should, preferably, be applied individually to each test piece. However, the use of equipment enabling the pressure to be applied simultaneously to several test pi

41、eces is also permitted if there is no danger of interference when failure occurs. NOTE 2 If the tests are carried out at a specified stress, the dimensions of the various test pieces should be similar. NOTE 3 It is recommended that an automatic system be used which adjusts the pressure to keep it wi

42、thin the specified limits. DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 8 5.6 Pressure measuring device, having an accuracy within 1,0 % of the test pressure. 5.7 Electrical resistance meter and associated circuit (optional, see 9.1), capable of detecting a change in electrical resistance to a level

43、 of 3 M or less (see 9.2.3) between a sufficiently conductive test liquid and a conductive layer. 5.8 Strain measuring device(s) (optional, see 8.2), capable of measuring the required strain to an accuracy of within 2 %. 6 Test pieces 6.1 Number The number of test pieces shall be as specified in the

44、 referring standard. 6.2 Free length Each test piece shall comprise a full section of the pipe, the free length (L) of which, between the sealing devices, shall be as specified in the referring standard. 6.3 Cutting The ends shall be smooth, perpendicular to the axis of the pipe. 7 Conditioning Unle

45、ss otherwise specified by the referring standard, store the test piece(s) at the test temperature (see 8.1) for 24 h prior to testing. 8 Procedure 8.1 Conduct the following procedures at the temperature and tolerance specified in the referring standard. 8.2 If strain measurements are required, attac

46、h strain gauges and use equipment conforming to 5.8. 8.3 Attach the end-sealing devices (see 5.2) to the test piece (see Clause 6) and fill the assembly completely with water or the test liquid (see 5.7). Attach the test piece to the pressurizing system, avoiding entrapment of air. If testing with w

47、ater as the external environment install the test piece in the container (see 5.4) so that it is totally surrounded with water. 8.4 Raise the pressure inside the test piece to the desired level within 5 min (see 5.5). Maintain the pressure until failure. Record the period during which the test piece

48、 has been subjected to the test pressure to an accuracy of 2 % of the duration of the test in hours or 24 h, whichever is the smaller. 8.5 In case of an interruption in testing due to unforeseen circumstances, such as power failure, the test may be continued if the duration of the interruption is le

49、ss than 100 h. The length of the time of interruption(s) shall be deducted from the total running time of the test and shall be noted in the test report. DIN EN 1447:2011-01 EN 1447:2009+A1:2010 (E) 9 9 Detection of failure 9.1 General The test piece shall be considered to have failed when bursting (see 3.2), leaking (see 3.3) or weeping (see 3.4) is observed. Bursting or leaking can be detected visually or by a drop of pressure or loss of test li