PREMANT district heating pipe
Sleeve joint
Reduction sleeves, fitting sleeves and shrink-on end sleeves
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
PRE 6.342
Nom. width
Reduction sleeve
Length
Nom. width
D
D
D
D
L
D
D
D
D
L
mm
mm
mm
110
90
125
110
90
140
125
110
160
140
125
180
160
140
200
180
160
225
200
180
250
225
200
280
250
225
315
280
250
355
315
280
4. Fitting sleeve
Reduction sleeve
mm
mm
mm
mm
mm
mm
mm
Length
700
400
700
450
90
700
500
110
700
560
125
700
630
140
900
670
160
900
710
180
900
800
200
900
900
225
900
1000
250
900
1100
355
315
400
355
450
400
500
450
560
500
630
560
670
630
710
670
800
710
900
800
1000
900
280
900
315
900
355
1200
400
1200
450
1200
500
1200
560
1200
630
1400
670
1400
710
1400
800
1400
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.
Nominal width:
90 ... 1200
Length:
700, 1000, 1400 mm
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.
Nominal width:
Length if end is:
dished end:
one time ball valve:
23.5.2023 BGP
Subject to technical changes
90 ... 1200
700 mm
1400 mm
