Pipe for cold and hot water network, central-heating and under-floor heating systems

Standard: EN ISO 15875 – 1: 2003, EN ISO 15875 – 2: 2003, DIN 4726 :2000, DIN 16892 : 2000, DIN 16893 : 2000

Number of technical permission in building industry: A – 17/1999 ( 31 March 2004)

Application field: Pipes are applicable for cold- and hot-water networks, central- or under-floor heating networks with the following network’s properties. (working temperature)

Cold-water network	20^oC
Hot-water supply from network	60 – 80^oC
Under-floor heating or radiator heating on low temperature	60 – 70^oC
Radiator heating on high temperature	80 – 90^oC

Selection of pipes happen according to the working temperature and pressure (4–10 bar) shown in Table No.1.)
The three-layer pipes has a preventing layer against oxygen diffusion.
The single-layer pipes are applicable with the following conditions:

These pipe has not any preventing layer against oxygen diffusion, therefore in the heating network should be prevented those parts, which are capable for corrosion (separation with heat-changer, additive – inhibitor – in the heating system, application of non-corrode materials, etc.)

Material: chemical (with silane) cross-linked polyethylene – PE – X_b

Execution:

Single-layer type
Multi-layer NOOXYPIPE^® – 3 type

Colour:

Self-coloured
Or according to customers’ requirements

Execution: in 300 metres long rolls

Nominal dimensions and strength characteristics

Table No.1.

Outer diameter (d_n)	Wall thickness (e_n )	strength characteristics ( S )
( mm )	( mm )	( – )
12	1,7	3,0
14	2,0	3,0
15	1,7	3,9
16	1,5	4,8
16	2,0	3,5
16	2,2	3,15
17	2,0	3,75
18	2,0	4,0
20	2,0	4,5
20	2,8	3,07
22	2,3	4,3

Structural characteristics of cross-linked polyethylene pipes:

Basic pipe:

At both execution/types the inner pipe is called, which is in direct connection with cold or hot-water or with the heating-agent and meets the necessary requirements of conduit and water networks and products for construction purposes. (lifetime, temperature, pressure, fire-proof quality, hygienic, health and environmental protection, noise and vibration protection, energy saving)

Material: chemical (with silane) cross-linked polyethylene – signing – PE – X_b

Outer layer:

It can be found only at NOOXYPIPE ^®– 3 – a plastic preventing layer, which can reduce and stop through the wall of pipe the oxygen diffusion in the pipe

Material: Ethylene – vinyl-alcohol ( EVOH ) copolymer

Middle layer:

It can be found only at NOOXYPIPE ^®– 3 – Binding or adhesive layer, which help by sticking of inner layer (basic pipe) and outer layer

Material: special plastic polymer

The layers of the three-layer NOOXYPIPE^® – 3 PE – RT are developed during the production, and through its lifetime they cannot be broken off each other.

Quality characteristics:

The quality of the pipe is determined by the with silane cross-linked polyethylene with high density (PE – X_b), which will be cross-linked in a short period of time after production. (A spatial tied structure is developed from the linear polymer chains, which makes possible the use of these products also in building for a long lifetime.)

Raw material:

Density: g / cm³ 0,94

Tensile strength: N/ mm² 22

Elongation at rupture: % 200

Modulus of flexibility : (20º C on) N / mm² 600

Thermal conductivity: WK^-1 m^-1 0,41

Degree of cross-linking: % kb.65

General linear coefficient of thermal expansion: K^-1 1,5 x10^-4

Finished product:

Dimensions:

Dimensions and tolerances meet the requirements of Standard EN ISO15875 – 2 : 2003 and DIN 16893 : 2000 (Table No.1.)

By multi-layer pipe the wall thickness is related only to the basic pipe!

Thickness of preventing layer: 0,08 mm

Thickness of adhesive layer: 0,04 mm

Thickness of preventing and adhesive layer together: max. 0,12 mm

Strength characteristics / degree:

Non-dimensional number, which describe the strength of the pipe

Sign : S

Calculation formula: S =( d_n– e_n)/2e_n

Lifetime: minimum 50 years, according to application experiences and calculations, supposing a pipe with recommended rigidity applied in heating systems, described in the Standard.

Surface:

Smooth outer and inner surface. On the outer surface any scratches, which can be damaging the preventing layer are not permitted. On the inner surface some linear slight scratches, which developed during the production and does not influence the rigidity and lifetime of the pipe can be permitted.
Bending radius: min. 5 d

Degree of oxygen diffusion: less, thank 0,1 g/m³/nap

Chemical-proof quality:

The pipe resist all kind of materials can met in a construction. Pipe should be prevented from detergent materials, oil, bitumen. (At special materials suggested to ask for help by the manufacturer)

Weather-proof quality:

The pipe’s material can be damaged by UV radiation. Through a longer storage the pipe should be prevented from the damaging effects of weather (storage in roofed site)

Marking:

Application and identification details are indicated by the producer on the outer surface of the pipe in every metre, which is well readable without any expedient..

Application guide:

Selection of pipe’s dimension

Relating the expected / planned characteristics of the hot-water and heating networks VSZM suggest to select the CROSS-LINKED PILYETHYLENE pipe according to this table below:

Requirement: the strength character should be less as it is given in the table.

Thermal characteristic of water network	Applicable pipe’s strength character
	Working pressure

	4 bar	6 bar	8 bar	10 bar
20°C cold-water network	All dimension	All dimension	All dimension	All dimension

1^st Class	S _max 7,6	S _max 6,4	S _max 4,8	S _max 3,8
60°C hot-water network	All dimension	All dimension	All dimension	12 x 1,7 14 x 2, 16 x 2 16 x 2,2 17 x 2 20 x 2,8

2^nd Class	S _max 7,6	S _max 5,9	S _max 4,4	S _max 3,5
70°C hot-water network	All dimension	All dimension	All dimension	12 x 1,7 14 x 2, 16 x 2 16 x 2,2 20 x 2,8

4^th Class	S _max 7,6	S _max 6,6	S _max 5,0	S _max 4,0
Under-floor heating system on 40 and 60°C, or radiator heating on low temperature	All dimension	All dimension	All dimension	12 x 1,7 14 x 2, 15 x 1,7 16 x 2, 16 x 2,2 17 x 2 , 18 x 2 20 x 2,8

5^th Class	S _max 7,6	S _max 5,4	S _max 4,0	S _max 3,2
Radiator heating on high temperature of 60 and 80 °C	All dimension	All dimension	All dimension Except: 16 x 1,5 20 x 2, 22 x 2,3	12 x 1,7 14 x 2 16 x 2,2 20 x 2,8

(Table is made according to EN ISO 15875 :2003)

Those pipe has not any preventing layer against oxygen diffusion, therefore in the heating network should be prevented those parts, which are capable for corrosion (separation with heat-changer, additive – inhibitor – in the heating system, application of non-corrode materials, etc.)

The cross-linked polyethylene pipe can be directly laid into concrete and is applicable for all kind of heating system specified in Standard of MSZ EN 1264 – 1 : 1999.

By storage, transport and install the pipe should be prevented from any damaging. Installation of damaged and dirty pipes is forbidden!

The pipe must not be broken by installation! The heating of the pipe by flame is forbidden. (If it is needed just by hot water.)

By installation under plaster or out of the wall a protective pipe is necessary because of thermal expansion. Protective pipe should be water-proof.

By longer pipe sections (which is not laid in concrete) a compensational curve is necessary because of length changing. ( U Z )

Pipes can be equally bounded by disengaged – clamping, otherwise by express junction, not releasable moulded metal bind. (The supplementary control and drive in of binding should be assured.), (Threaded bindings must not be concreted)

If necessary for lengthening of pipe a stamped binding is applicable. In this case the pipe should be supported by a supporting sleeve from inside.

The heating system should be planned by a responsible designer and according to the plans should be completed and put in working by the guidance and control of a qualified technician.