iso4427-2-2007聚乙烯給水管材

1、 Reference number ISO 4427-2:2007(E)© ISO 2007INTERNATIONAL STANDARD ISO 4427-2First edition 2007-08-01Plastics piping systems — Polyethylene (PE) pipes and fittings for water supply —Part 2: Pipes Systèmes

2、 de canalisations en plastique — Tubes et raccords en polyéthylène (PE) destinés à l'alimentation en eau — Partie 2: Tubes Copyright International Organization for Standardization Provided by IH

3、S under license with ISO Not for Resale No reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 4427-2:2007(E) © ISO 2007 – All rights reserved iiiContents Page Forewo

4、rd............................................................................................................................................................ iv Introduction .............................................

5、........................................................................................................... v 1 Scope .....................................................................................................

6、................................................ 1 2 Normative references ........................................................................................................................... 2 3 Terms, definitio

7、ns, symbols and abbreviated terms......................................................................... 2 4 Material ...................................................................................................

8、............................................... 3 4.1 Compound............................................................................................................................................. 3 4.2 Identi

9、fication compound ...................................................................................................................... 3 5 General characteristics ......................................................

10、.................................................................. 3 5.1 Appearance ......................................................................................................................................

11、..... 3 5.2 Colour .................................................................................................................................................... 3 5.3 Effect on water quality...................

12、....................................................................................................... 3 6 Geometrical characteristics....................................................................................

13、............................. 3 6.1 Measurements....................................................................................................................................... 3 6.2 Mean outside diameter and

14、out-of-roundness (ovality).................................................................... 3 6.3 Wall thicknesses and their tolerances................................................................................

15、................ 5 6.4 Coiled pipe........................................................................................................................................... 10 6.5 Lengths ...........................

16、..................................................................................................................... 10 7 Mechanical characteristics .....................................................................

17、........................................... 10 7.1 Conditioning........................................................................................................................................ 10 7.2 Requireme

18、nts...................................................................................................................................... 10 7.3 Retest in case of failure at 80 °C .................................

19、...................................................................... 12 8 Physical characteristics..................................................................................................................... 1

20、2 8.1 Conditioning........................................................................................................................................ 12 8.2 Requirements..........................................

21、............................................................................................ 12 9 Chemical characteristics of pipes in contact with chemicals........................................................ 14 10

22、 Performance requirements ................................................................................................................ 14 11 Marking .................................................................

23、............................................................................... 14 11.1 General...........................................................................................................................

24、...................... 14 11.2 Minimum required marking of pipes................................................................................................. 14 Annex A (normative) Layered pipes...................

25、............................................................................................ 15 Annex B (informative) Relationship between PN, MRS, S and SDR ........................................................... 1

26、7 Bibliography ..................................................................................................................................................... 18 Copyright International Organization for Standardiza