8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes 3 Shrink on reduction sleeves For reasons related to statics shrink on reduction sleeves to insulate steel reduction joints that are welded in by the pipelayer provided by the customer or others are designed to reduce the dimension by a maximum of three steps Their structure corresponds to that of the non cross linked PE shrink sleeve and they must be pushed onto the outer casing before the medium pipe is welded The non cross linked reduction shrink sleeve consists of a heat shrunk PE sleeve pipe and the following accessories Shrink on collars Permanently elastic sealing strip butyl rubber Venting plug Welded in PE plug 4 Fitting sleeve Fitting sleeves made of non cross linked PE are used when it is not possible to push the joint sleeves on due to shortage of space The fitting sleeve is separated in the axial direction and it can then be moved into position over the points where the pipes are connected This separation point is welded to guarantee the tightness of the sleeve 5 Shrink on end sleeve The shrink on end sleeve is used to insulate pipe closures in the ground and in buildings or shafts It has the same structure as a non cross linked PE shrink on sleeve but is sealed on one side with a PE end cover 6 342 Sleeve joint Reduction sleeves fitting sleeves and shrink on end sleeves Nominal width 90 1200 Length 700 1000 1400 mm Nominal width 90 1200 Length if end is dished end 700 mm one time ball valve 1400 mm Nom width Reduction sleeve Length D D D D L mm mm mm mm mm 110 90 700 125 110 90 700 140 125 110 90 700 160 140 125 110 700 180 160 140 125 700 200 180 160 140 900 225 200 180 160 900 250 225 200 180 900 280 250 225 200 900 315 280 250 225 900 355 315 280 250 900 Nom width Reduction sleeve Length D D D D L mm mm mm mm mm 400 355 315 280 900 450 400 355 315 900 500 450 400 355 1200 560 500 450 400 1200 630 560 500 450 1200 670 630 560 500 1200 710 670 630 560 1200 800 710 670 630 1400 900 800 710 670 1400 1000 900 800 710 1400 1100 1000 900 800 1400

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