Uponor Tap Water and Radiator
Connection MLCP System
P L U M B I N G S O L U T I O N S
T E C H N I C A L G U I D E L I N E S
Uponor - partnering with professionals
Uponor keeps its promises
People care more and more about the environment in
which they live and work: whether it is commercial
buildings, private residences or open and public spaces.
Apart from that, standards and styles change and so do
people’s expectations. In order to find the right systems
and services to meet those demands, it becomes in-
creasingly important to know where to go and whom
to trust!
With Uponor, you partner with professionals who know
how to satisfy your demands. Because we’ve always
been working closely together with our partners and
customers, we know about their needs. We want to
give you more and we have to offer something special
– everything to help you enjoy more success.
In an increasingly complex world, we shall always be the
smarter choice.
Competence and experience – the Uponor multi
layer com posite pipe system (MLCP)
With an annual production of more than 100 million
metres of pipes and many millions of metal and com-
posite fittings, we market the comprehensive Uponor
MLCP system in more than 60 countries worldwide
– underlining our pioneering throughout the world
today. The key to success is responding quickly and
flexibly to market requirements as well as offering
a spectrum of products that are unbeaten in terms
of quality, safety, service and range. And all that is
designed, developed and manufactured by one and the
same reliable company.
Our partners and customers profit from convenient
and reliable solutions for a wide range of installations.
All Uponor products are available over the long-term.
Quality, service and environmental friendliness are key
objectives in the development pro cess. The system con-
sists of in-house produced composite pipes and fittings
that match perfectly. The system will be compli mented
by the necessary accessories and a sophisticated tools
program – everything out of one hand.
Contents
Description of basic system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Technical data MLC pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Thermal expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Distributing and risers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Determination of the bending leg length . . . . . . . . . . . . . . . . . . . . . . .11
MLC pipe pressure-loss graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Calculation basics – Radiator connection . . . . . . . . . . . . . . . . . . . . . . .13
Mounting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Pressure test with water for tap water pipes . . . . . . . . . . . . . . . . . . . . .23
Pressure test report for radiator connection . . . . . . . . . . . . . . . . . . . . .24
List of abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
How to contact us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4
Description of basic system
The basic range of Uponor products
includes all system components de-
signed for different uses in a variety
of applications, e.g. tapwater and
radiator connection as well as radi-
ant heating/cooling.
Description pipe
The Uponor multi-layer composite
pipe (MLCP) is a pipe generation
that unites the advantages of a
plastic and metal pipe and therefore
offers a high degree of flexibility
and toughness, coupled with high
pressure and temperature resistance.
The Uponor MLC pipe consists of a
longitudinal safety welded alumini-
um pipe, to which an inner and out-
er layer of high temperature resist-
ant polyethylene is applied (in
accordance with DIN 16833). Owing
to the specific form of the octene
side chains in the molecular struc-
ture of the material, a similar effect
is achieved when polyethy lene is
cross-linked.
All layers are permanently bounded
together by means of an intermedi-
ate adhesive layer. A special welding
technique guarantees a maximum of
safety. The thickness of the alumini-
um selected for the Uponor MLC
pipe is exactly adapted to the com-
pressive strength requirements as
well as the bending capability.
Smaller dimensions of MLC pipes are
designed so that the aluminium layer
neutralises the snap-back forces of
the plastic material, enabling easier
pipe installation with minimal effort.
Larger dimensions of MLC pipes and
straight lengths of pipes have a
greater aluminium layer thickness,
making them stiffer and suitable for
use as risers. The aluminium pipe is
important for heat expansion. Ow-
ing to the permanent bond between
plastic and aluminium, thermal ex-
pansion is determined by the expan-
sion factor of the aluminium and
roughly corresponds to that of a
metal pipe, i.e. only 1/7th of the
expansion of a pure plastic pipe.
This offers advantages for pipe in-
stallation, since the use of compen-
sating points is largely unnecessary.
The smoothness of the inner plastic
layer offers water no points of at-
tack. Incrustration and corrosion are
prevented in normal use. The trans-
mission of flow noise or noise, e.g.
emitted by circulating pumps, is re-
duced to a minimum due to the spe-
cific properties of the raw material.
The most important advantages of-
fered by MLC pipes are:
Absolutely diffusion-tight,
exceed the requirements of
DIN 4726
Hygienicly harmless
Minimal roughness k = 0.0004 mm
ensuring less pipe friction and
lower pressure losses
Form stable, by compensation
and reduction of snap-back forces
Highly flexible, making smaller
dimensions (up to 32 x 3 mm)
simple to bend by hand or with
the corresponding tool
Heat expansion similar to that of
metals, enabling larger pipe clip
distances
Clean and easy to install, no
welding, soldering, thread cut-
ting or bonding
Corrosion-resistant, thanks to its
inner and outer plastic layer
Excellent long-time rupture
strength offers safety in daily use
Maximum temperature: 95 °C *
Maximum continuous operating
pressure: 10 bar at 70 °C continu-
ous operating temperature, with a
tested longtime rupture strength
of 50 years, safety factor 1.5 *
Low weight, easy handling
Coils and straight lengths in
numerous sizes
The DGVW approval permits the use
of Uponor MLC pipe for drinking
water supply systems according to
DIN 1988 TRWI. The approval in-
cludes a positive assessment of the
material according to the law gov-
erning plastic articles for food use in
drinking water supply, called KTW
recommendation for short.
* In case of different parameters please con-
sult Uponor.
50 m t 50 k
The Uponor
multilayer composite
pipe has a length
expansion close to
metal pipes because
of its tight connec-
tion between the
polyethylene and
the aluminium layer.
Longitudinally welded
aluminium
Adhesive PE-RTPE-RT Adhesive
Structure of
MLC pipe with
outer diameter
of 14 - 110 mm
PP
PB
PVC
Uponor MLC pipe
Copper
Galvanized steel
Stainless steel
5
Description of basic system
System advantages
The MLCP installation system offers
the following advantages:
Certification:
MLC pipe and connection
systems are approved in numer-
ous countries throughout the
world, e.g. Switzerland, Nether-
lands, Italy, Norway, Poland,
Russia, United Kingdom
DVGW certification of MLCP
system, includes pipes, fittings
and Uponor pressing tool
General test certificate of the
supervising authority (ABP) for
MLC pipe penetrations (bulk-
heads) R 30 to R 90 with ROCK-
WOOL Conlit shells 150 P/U for
the outer diameters 14 to 110 mm.
Note:
The approvals depend on the level
of technology and advances in
testing. Detailed information on the
current approval status at the
various institutes can be provided
on request.
Material quality Uponor MLC Pipe:
Excellent resistance to internal
pressure in long-time stress
rupture test, i.e. exceptional
long-time rupture strength
Maximum service life
Quality test (SKZ)
Complies with the law governing
plastic articles for food use in
drinking water supply (KTW
recommendation)
Low heat expansion
Form stability thanks to com-
pensation of snap-back forces
Highly flexible
Low pipe roughness
Installation:
Easy, quick and clean installation
Only a few tools needed for all
applications
Easy to use and time saving
installation
Cold installation without hot
water filling, also with tight
bending radius
Low labour costs
The pipe straigthener can be
used to straighten offcut sec-
tions of MLC pipe (supplied in
coils or straight length) with an
outer diameter of 14, 16, 18, 20
or 25 mm
Easy pressure testing with the
pressure test plug
Service:
Highly competent team at
company headquarter, with
experienced professionals on
hand to provide qualified
customer service for all manner
of applications
An own R&D-department with
long experience in the complete
manufacturing process, dedi-
cated to the ongoing production
of innovative developments for
Uponor
Information that is kept con-
stantly updated via our website,
with a wide range of details of
customer seminars and opportu-
nities for further training in the
use of our products
Factory visits, training courses
held on our premises or onsite
Onsite advice and project
consultation services for all
products, along with professional
planning software ranging from
simple sets of data to full CAD
applications, plus project plan-
ning support for our service
providers
Advice on the use of the calcula-
tion and costing program, HSE
Exhaustive planning documenta-
tion with ample real-case
examples of applications
Assistance from the project
planning stage to the final
completion phase, project
consultation services
Claims management
The Uponor MLCP system (i.e.
pipes and connectors) carries a
ten-year limited warranty
6
Description of basic system
Press fittings
The patented MLCP pressing system
enables connections to be estab-
lished within a matter of seconds
without welding or soldering. The
externally fixed press sleeve, which
is permanently connected to the
fitting, offers protection against
mechanical influences on the
o-rings. The press sleeve has
inspection windows to check the
insertion depth of the pipe in the
fitting before pressing. The plastic
stop ring on the shaped aluminium
press sleeve simplifies the task of
attaching the pressing jaws. The
stop rings are colour coded to
ensure an optical press marking.
After the pressing procedure the
rings fall off. The pressing jaws and
the stop rings of the same dimen-
sion have been marked with the
same colour code. After installation,
the connection is capable of
ab-sorbing bending forces, due to
the form stable press sleeve,
without any leakage occurring.
After pressing the pipe can be
readjusted.
Sectional drawing
of 14 - 32 mm press
metal fitting with
profile aluminium
sleeve and plastic
stop ring
Sectional drawing
of 40 - 50 mm metal
press fitting with
stainless steel
pressure sleeve
Sectional drawing
of 16 - 32 mm
composite press
fitting
Sectional drawing
of 63 - 110 mm
press fitting with
stainless steel
pressure sleeve
optimiert1
optimiert2
7
optimiert1
optimiert2
Compression fittings
The MLC range of compression fit-
tings is designed to enable all con-
ventional applications.
MLC compression fittings press the
insert part (2) with fixed closed
clamp ring (3) on to the MLC pipe
by tightening the swivel nut (1).
The compression fitting can be
released again; whereas the insert
part, made of PPSU, remains per-
manently connected to the pipe.
All ¾ inch compression adapters in-
clude eurocone threaded parts.
Both press and compression fittings
are permanently tight as confirmed
by SKZ test reports and DVGW
certificates.
Quality control
Constant quality controls before
and during production:
Online inspections using special
cameras, ball test, spiral test,
measurement and tensile test.
In the works laboratory: Raw
material testing, pipe tests using
test piece (peeling test, thick-
ness gauging), pressure and
temperature tests and hot stor-
age test.
Tests carried out by neutral Ger-
man and international test insti-
tutes.
According to the DVGW worksheet
W 542, the minimum long-time
rupture strength of multi-layer
composite pipes in drinking water
distribution systems must be veri-
fied over a period of minimum 50
years. For this purpose, an inde-
pendent test institute performs a
number of tests and prepares the
resulting internal pressure resistance
diagrams.
These values are provided by the
SKZ for Uponor MLCP. In addition
to further tests, the values shown in
the long-time internal pressure dia-
grams form the basis for the issu-
ance of the DVGW system test mark
for MLCP with associated connec-
tors. Together with the test institute
and DVGW, Uponor is constantly
working on pipe system tests in
conformance with the associated
worksheets of the DVGW.
The aim of these endeavours is to
assure the quality of all currently
approved MLCP products as well as
extending the DVGW approval to
new parts, fittings and pipe dimen-
sions in the MLCP range of products.
Description of basic system
Sectional drawing
of 14 – 25 mm
compression fitting
(1)
(2)
(3)
8
Uponor multi-layer composite pipes
have a life expectancy of minimum
50 years with correct use.
Description of basic system
The loading capacity of the connec-
tions is tested in regular tensile
tests. In addition to continuous pipe
testing in the laboratory, every MLC
pipe coil is tightness-tested under
pressure.
1 , 0
1 0 , 0
1 0 0 , 0
1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0
t i m e i n [ h ]
2 0 ° C 6 0 ° C 7 0 ° C 9 5 ° C
1 5 1 0 2 5 5 0
y e a r s
Pressure in [bar]
Internal pressure
rupture strength
(Hydrostatic stress
performance
diagram)
9
Technical data MLC pipe
Dimensions d
a
× s (mm) 14 × 2 16 × 2 18 × 2 20 × 2.25 25 × 2.5 32 × 3 40 × 4 50 × 4.5 63 × 6 75 × 7.5 90 × 8.5 110 × 10
Inner diameter d
i
(mm) 10 12 14 15.5 20 26 32 41 51 60 73 90
Coil length (m) 200 200/500 200 100/200 50/100 50 - - - - - -
Straight length (m) - 5 5 5 5 5 5 5 5 5 5 5
Outer diameter of coil (cm) 80 80 80 100 120 120 - - - - - -
Weight of coil/straight length
(g/m)
91/- 105/118 125/135 148/160 211/240 323/323 -/508 -/745 -/1224 -/1788 -/2545 -/3597
Weight of coil/straight length
with water 10 °C (g/m)
170/- 218/231 277/289 337/349 525/554 854/854 -/1310 -/2065 -/3267 -/4615 -/6730 -/9959
Weight per coil (kg) 18.2 21.0/52.5 24.6 14.8/29.6 10.6/21.1 16.2 - - - - - -
Weight per straight length (kg) - 0.59 0.68 0.80 1.20 1.62 2.54 3.73 6.12 8.94 12.73 17.99
Water volume (l/m) 0.079 0.113 0.154 0.189 0.314 0.531 0.800 1.320 2.040 2.827 4.185 6.362
Pipe roughness k (mm) 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004
Thermal conductance
λ (W/m × K)
0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40
Expansion coefficient
α (m/m × K)
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
25 × 10
-6
Minimum manual bending
radius: 5 × d
a
(mm)
70 80 90 100 125 160 - - - - - -
Minimum bending radius with
inside bending spring
4 × d
a
(mm)
56 64 72 80 100 128 - - - - - -
Minimum bending radius with
outside bending spring
4 × d
a
(mm)
56 64 72 80 100 - - - - - - -
Minimum bending radius with
bending tool (mm)
43 49 49 78 80 128 - - - - - -
Maximum horizontal distance
between fasteners (m)
1.20 1.20 1.20 1.30 1.50 1.60 2.00 2.00 2.20 2.40 2.40 2.40
Tap water: The maximum permanent operating temperature exists between 0°C and 70°C at a maximum permanent operating
pressure of 10 bars*. The short-term malfunction temperature is 95°C of a maximum of 100 hours in the operating lifetime.
Heating: The maximum permanent operating temperature is 80°C at a maximum permanent operating pressure of 10 bars*. The
short-term malfunction temperature is 95°C of a maximum of 150 hours in the operating time per year.
* In some special products the permanent operating pressure is lower than 10 bars. Please have a look on the pipe marking.
In case of exceeding the maximum permanent operating temperatures e.g. in solar systems or district heating systems, the Uponor MLCP
system can’t be connected directly to this kind of systems. It has to be ensured that in every situation the maximum limits of use of the
Uponor MLCP system are not exceeded. In case of other use of the Uponor MLCP system Uponor has to be consulted.
Resistance of temperature:
10
Thermal expansion
Distributing and risers
90
80
70
60
50
40
30
20
10
0
20 30
40
50
∆t = 10K
∆t = 20K
∆t = 30K
∆t = 40K
∆t = 50K
∆t = 60K
∆t = 70K
∆l = Thermal expansion mm
90
10
0
L: Pipe length [m]
L
BS
Bending leg
Expansion leg
Fixed point (FP)
Fixed point (FP)
Sliding clamp (GS)
∆l
The thermal expansion resulting
from the mode of operation must be
taken into account in the design of
the pipe layout. The temperature
difference Δt and pipe length L play
a decisive role in thermal expansion.
For all installation variants, the ther-
mal expansion of MLC pipes must
be taken into account. For pipes in-
tended for concealed installation or
installation in screed, the thermal
expansion is absorbed by insulation
in the area of directional change.
The thermal expansion is calculated
according to the following formula:
Δl = α x L x Δt
Where the following are:
Δl: Thermal expansion (mm)
α: Thermal expansion coefficient
(0.025 mm/(m x K))
L: Pipe length (m)
Δt: Temperature difference (K)
For the planning and installation of
distributing and rising mains with
MLC pipes, in addition to the struc-
tural requirements, also thermal ex-
pansion aspects must be taken into
account.
Rigid installation with MLC pipe is
not possible. Thermal expansion of
the pipes must always be absorbed
or controlled.
Exposed MLC pipes fully exposed to
thermal expansion, must be provid-
ed with appropriate expansion com-
pensation. For this purpose, a
knowledge of the position of all
fixed points is necessary. Compensa-
tion always takes place between two
fixed points (FP) and directional
changes (bending leg BS).
11
Determination of the bending leg length
Graph of required bending leg length
80 70 60 50 40 30 20 10 500 1000 1500 2000 2500
∆t = Temperature difference [K]
L = Bending site length [m]
Example:
Installation temperature: 20 °C
Operating temperature: 60 °C
Temperature difference ∆T: 40 K
Expansion leg length: 25 m
MLCP sizes d
a
s:
32 3 mm
Required bendin
g
site len
g
th BS: about 850 mm
5
10
15
20
25
30
35
40
45
50
14 16 18 20 25 32 40 50 63 75
90
110 mm
d
a
=
BS = Bending site length [mm]
Calculation formula
d
a
Outer diameter MLCP in mm
L Pipe length in m
BS Bending site length in mm
Thermal expansion coefficient (0.025 mm/(m x K))
Temperature difference in K
∆t
BS = 30 da (∆t L)
0
0
80 70 60 50 40 30 20 10 500 1000 1500 2000 2500
∆t = Temperature difference [K]
L = Bending site length [m]
Example:
Installation temperature: 20 °C
Operating temperature: 60 °C
Temperature difference ∆T: 40 K
Expansion leg length: 25 m
MLCP sizes d
a
s:
32 3 mm
Required bending site length BS: about 850 mm
5
10
15
20
25
30
35
40
45
50
14 16 18 20 25 32 40 50 63 75
90
110 mm
d
a
=
BS = Bending site length [mm]
Calculation formula
d
a
Outer diameter MLCP in mm
L Pipe length in m
BS Bending site length in mm
Thermal expansion coefficient (0.025 mm/(m x K))
Temperature difference in K
∆t
BS = 30 da (∆t L)
0
0
80 70 60 50 40 30 20 10 500 1000 1500 2000 2500
∆t = Temperature difference [K]
L = Bending site length [m]
Example:
Installation temperature: 20 °C
Operating temperature: 60 °C
Temperature difference ∆T: 40 K
Expansion leg length: 25 m
MLCP sizes d
a
s:
32 3 mm
Required bendin
g
site len
g
th BS: about 850 mm
5
10
15
20
25
30
35
40
45
50
14 16 18 20 25 32 40 50 63 75
90
110 mm
d
a
=
BS = Bending site length [mm]
Calculation formula
d
a
Outer diameter MLCP in mm
L Pipe length in m
BS Bending site length in mm
Thermal expansion coefficient (0.025 mm/(m x K))
Temperature difference in K
∆t
BS = 30 da (∆t L)
0
0
12
MLC pipe pressure-loss graph
The pressure-loss graph shows the
pipe-conduit characteristics for MLC
pipe, along with the various dimen-
sions and flow-rate limits.
Using the graph, it is simple to as-
certain the pipe-friction resistance
per metre - for a given volume flow
- relative to the dimensions of the
pipe and the flow rate.
v = 0,1 m/s
Peak flow rate V
s
[l/s]
·
Pressure-loss due to pipe friction R [hPa/m]
1.000,0
100,0
10,0
1,0
0,1
0,01
0,1
1,0
10,0
100,0
14
13
Calculation basics – Radiator connection
MLC pipe pressure-loss graph
The pressure-loss graph shows the
pipe-conduit characteristics for MLC
pipe, along with the various dimen-
sions and flow-rate limits.
Using the graph, it is simple to as-
certain the pipe-friction resistance
per metre - for a given volume or
flow - relative to the dimensions of
the pipe and the flow rate.
Output Q in kW at
∆T = 5 K ∆T = 10 K ∆T = 15 K ∆T = 20 K
Flow rate
m in kg/h
Pressure-loss due to pipe friction R in Pa/m
v
Pressure loss due to pipe friction depending on flow rate at medium water tempera-
ture of 60°C
14
Pressure loss due to pipe friction depending on flow rate at medium water temperature of 60°C
Output Q in kW at
∆T = 5 K ∆T = 10 K ∆T = 15 K ∆T = 20 K
flow rate
m in kg/h
Pressure-loss due to pipe friction R in Pa/m
v
Calculation basics – Radiator connection
15
Uponor Unipipe MLC Pipe 14 – 110 mm
Mounting instructions
1
25 - 63 mm
50 - 75 mm
14 - 20 mm
2
1
1
1
1 2 3
1
2
4
5
6
90 - 110 mm
3
14 - 20 mm
16
Mounting instructions
R
mi n
d
a
∆q
∆l L
BS
d
a
R
mi n
d
a
R
mi n
d
a
R
mi n
d
a
14 - 25 mm
16 - 32 mm
d
a
R
min
[mm] [mm]
14 70
16 80
18 90
20 100
25 125
32 160
d
a
R
min
[mm] [mm]
14 56
16 64
18 72
20 80
25 100
32 128
d
a
R
min
[mm] [mm]
14 56
16 64
18 72
20 80
25 100
d
a
R
min
[mm] [mm]
14 40
16 46
18 52
20 80
25 83
32 111
14 - 25 mm
14 - 25 mm
∆l [mm] = ∆q [K] • 0,025 • L[m]
BS[mm] = 30 • d
a
[mm] • (∆q [K] • 0,025 • L [mm])
17
Mounting instructions
d
a
5
4
40 - 75 mm
max. 500 Umin
-1
14 - 32 mm
90 - 110 mm
14 - 32 mm 16 - 32 mm 14 - 25 mm
PPSU
2
3
1
min.
2 mm
min.
4 mm
18
Mounting instructions
14 – 20 16 – 32 – – 16 – 32 –
14 – 20 14 – 32 – – 14 – 32 –
–
– 40 – 50 – – –
–
– – 63 – 110 – –
–
– – – – 14 – 25
KSP0
PPSU
PPSU
16 – 32 mm
19
Mounting instructions
14 – 32 mm
40 – 50 mm
20
63 – 110 mm
1 3
2
4
5
6
Mounting instructions
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
/
