Teraplast - Water supply and heating system / PP-H and PP-R pressure pipes

I. 1. Polypropylene pressure pipes

The polypropylene pressure pipes are manufactured according to
the German standards DIN 8077 / 8078.

Applications and recommended types:

PP homopolymer pipes:

		cold water distribution networks - NP 10
		industrial fluids transportation

PP-R copolymer pipes:

		cold and hot water networks - NP 10, NP 16, NP 20
		heating networks - NP 10, NP 16, NP 20, NP 25
		industrial fluids transportation

PP-R copolymer pipes with Al insertion (oxygen barrier pipes):

heating networks

Raw material type

Material characteristics

Density

		PP-R:~0,91 G/cm³
		PP-H:~0,905 G/cm³

Linear extension coefficient

		PP-R:~0,15 Mm/m
		PP-H:~0,14 Mm/m

Thermic conductivity:

		PP-R:~0,23 KW/m
		PP-H:~0,2 KW/m

Elasticity modulus:

		PP-R:≥1200 KMP/m
		PP-H:1400-1600 KMPa

Electrical resistivity:

		PP-R:>10¹² Ω
		PP-H:>10¹² Ω

Application

Networks for hot and cold water, for industrial fluids transport, for heating (DIN 8077 / DIN 8078)

Pipes characteristics:

Sizes and aspect change after heating for
120 ± 2 min. at 150 ± 2° C (type1,2) , 135 ± 2° C (type 3):

Permission conditions:

The samples in the drying closet should not have swellings, air bubbles or exfoliation signs.

Checking standard:

SR EN 1451-1

Length variation:

≤ 2%

Vicat softening point:

≥130°C

Checking standard:

SR EN ISO 306

Internal Pressure resistance:

at 20ºC, type 1:σ=21 N/mm², type 2;3:σ=16 N/mm²,

Permission conditions : >1 h

at 95ºC, type 1:σ=3,5 N/mm², type 2:σ=2,6 N/mm², type 3:σ=3,5 N/mm²

Permission conditions : >1000 h

at 110ºC, type 1:σ=1,9 N/mm², type 2:σ=1,4 N/mm², type 3:σ=1,9 N/mm²

Permission conditions : >8760 h

Checking standard:

DIN 8078, SR EN 921, SR ISO 1167

Charpy impact resistance at ±2°C:

Permission conditions

Number of broken test tubes ≤10%

Checking standard:

DIN 8078, ISO 179

The advantages of polypropylene-random pipes

Compared to cold water PVC pipes:

		improved resistance in seismic activity areas owing to improved elasticity;
		higher use safety, with a lower risk of water losses owing to the joint mode;
		the networks are put into work in a short period of time;
		reduced weight;
		system flexibility

Comparing to cold water PE pipes:

		fast and easy mounting;
		superior rigidity;
		smaller distance between sustaining pieces (lower mounting costs);
		smaller weight of the mounted network;
		safer functioning (higher safety design coefficient – approximately 20 percent).

The pipe wall thickness has been calculated according to ISO 161-1. The pipe linear weights have been calculated at the material average density of 0,91 g/cm³.

The polypropylene random networks could be:

		hidden (buried into the plaster or floor);
		visible (mounted on the wall using fixing flanges).

Accessories :

polyfusion kit, taps, clamps, cutting device, insulation materials, water meter chamber

Approval:

The PP-R pipes are certified by a Technical Agreement.

Environment protection:

		the material is nontoxic for the environment;
		products are recyclable;
		they do not damage the ozone layer.

Delivery lengths:

		4000 - 6000 ± 50 mm.
		The above lengths represent the usefull pipe lengths.
		At customer`s request pipes can be cut at any other lengths.

Packing:

in PP or PE bags for pipes with a diameter of 20 to 63 mm;

Storage:

in metallic frames, avoid long UV exposure.

Handling and transport:

		Handled avoiding the pipes contact with aggressive substances and abrasive materials.
		The pallets with PP-R pipes do not be superposed and to be side fixed during the transport.

Mounting:

Joining by polyfusion - is realized with a special welding device with polyfusers, as it follows:

		the pipe is cut at the proper length with a special clipper.
		the welding surface is prepared, paying attention to the extremities that are to be welded, to be smooth and properly cleaned of impurities.
		the proper molds are fit up according to the welding diameter and the polyfusion tool plugged
		the pipe is marked on the fitting insertion length;
		secure the pipe and fitting on the mould turntable until a 1-2 m collar of melted material is formed ;
		he pipe and the fitting are removed and quickly joined seeing that the two pieces are coaxial (in line).

Electrofusion joining:

		the electroweldable connections are accessories made by injection and have an electrical resistance superficially inserted which, after the assembling is done, comes in contact with the tube or the piece for the connection. The contact clamps out from thewelding zone allow the connection of this resistance with an energy supply.
		after scraping, cleaning and positioning the pieces to connect, the voltage is applied to the contact clamps;
		the surface fusion between the pieces to connect is made.

The pieces to weld must be with a similar structure and must have identical or similar flowing characteristics.
Agreed and verified welding devices, allowing to weld in totally controlled conditions, are needed.