(19)

(11)

EP 2 526 327 A1

(12)

(43) Date of publication: 28.11.2012 Bulletin 2012/48 (21) Application number: 11700935.7 (22) Date of filing: 21.01.2011

(51) International Patent Classification (IPC):  F16L 3/22(2006.01) (86) International application number: PCT/EP2011/050825 (87) International publication number: WO 2011/089218 (28.07.2011 Gazette 2011/30)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 22.01.2010 EP 10151394 (71) Applicant: Wavin B.V. 8011 CW Zwolle (NL)	(72) Inventor: BUIRS, Geert Hilbrand NL-7813 AD Emmen (NL) (74) Representative: HOFFMANN EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)