Pipe Properties; Marking And Identification; Bending - LK Systems PE-X Assembly Instructions Manual

Assembly instructions | LK PE-X, PAL and PE-RT pipes

Pipe properties

Designation Pipe
dim.
(mm)
LK Under Floor 8x1.0
Heating Pipe 12x2.0
LK Under Floor 16x2.0
Heating Pipe 20x2.0
LK Heating pipe 25x2.3
32x2.9
LK Universal 16x2.0
Pipe PE-X 20x2.5
25x3.5
LK Universal 16x2.0
Pipe PAL 20x2.5
25x3.5
32x3.0
40x3.5
50x4.0
63x4.5
75x7.5
LK Pal Universal Pipe A16 (16x2,0) 10 bar 95°C Oxygen barrier acc. to DIN 4726 Certification body Date Time Metre
Example of markings for identification of a pipe

Marking and identification

LK pipes can always be identified as they are
marked repeatedly at every metre.

Bending

Bending of LK PE-X and PE-RT
Minimum recommended bend radii:
Bending method
Cold bending without fixture
Cold bending with fixture
Hot bending with bending
support
Precautions must be taken when installing PE-X
and PE-RT pipes at temperatures below -5 ˚C, par-
ticularly when bending.
EN.29.C.41.191217
2 (10)
Material Pipe range, design
Except PiP PiP
con- Extra
duit
PE-Xa X
PE-RT X
PE-Xa X
PE-Xa X X X
PE-RT/ X X X
AI/ X X X
PE-RT X X X
X X X
X
X
X
X
Minimum bend radius at
pipe dim.
16 20 25 32
80 130 180 260
55 110 140 210
34 45 60 95
Pres- Temperature range
sure
class
Insula- Max.
tion con-
tinuous
tempera-
ture
PN6 70 °C
PN6 60 °C
PN6 70 °C
PN10 70 °C
X PN10 70 °C
X
X
X
Cold bending without fixture
Where space permits large bend radii, we recom-
mend that the pipe bends be formed without a
fixture/support. Large radii facilitate any re-
placement of the pipe in inner pipe (pipe-in-pipe)
without causing structural damage. See section
Replacement of pipes in conduits.
NOTE!
The instructions concerning clamping and fix-
ing in the section entitled Pipe laying in tim-
ber frames on page 5 must be followed for
pipes in inner pipes that are to be replaced.
Bending PE-X pipes directly after press fitting
is not recommended. The distance between
the coupling and the PE-X pipe should be a 1
x the pipe's diameter before the bending, at a
minimum. This instruction is provided due to
the risk of stress corrosion.
Standard
Max. mo- Mini-
mentary mum
tempera- permit-
ture ted
tem-
pera-
ture
95 °C -20 °C EN ISO 15875
(DIN16892/3)
70 °C -20 °C EN ISO 22391
(DIN16833/4)
95 °C -20 °C EN ISO 15875
(DIN16892/3)
95 °C -20 °C EN ISO 15875
(DIN16892/3)
95 °C -20 °C EN ISO 15875
(DIN16892/3)