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GRP
pipes need no protection against corrosion because the
pipe materials are absolutely "corrosion proof" and thus are
virtually maintenance free. Thanks to their light weight and their long length, GRP
pipes are installed in times shorter than those required for other materials.
This means higher efficiency in terms of manpower and equipment and a faster
solution of social problems like the need for water.
Due to the low internal roughness (25µm), which
remains unchanged also after many years of operation, the GRP pipes have
excellent hydraulic characteristics and provide economic advantages over other
pipes material.
 GRP
Pipes are manufactured using filament winding process on computer controlled
machines. By adjusting the relative speed of mandrel rotation and glass
distribution head movement, helical reinforced layers with different angles
can be wound. In order to increase the pipe stiffness, especially on large
diameter pipes, silica sand can be added to parallel layers of wall. Pipes
manufactured using this process are used for aboveground and underground
installations, with gravity flow, medium and high internal pressure.
TECHNICAL CHARACTERISTICS OF GRP PIPING SYSTEMS
| Nominal Pressure |
up to 25 bar - for higher NP's, please contact
our Engineering Dept. |
| Nominal Diameters |
from 25 mm to 3000 mm |
| Standard length |
6 m up to ND100 and 12 m for bigger diameters |
Both pipes and fittings can be designed and verified for full
vacuum, depending on the specific pipeline characteristics. |
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QUALITY
ASSURANCE
GRP operates and maintains a Quality System that
meets the intents and requirements of NBS Voluntary Product Standard PS 15 69
developed by National Bureue of Commerce, USA and adopted by SPI. |
| INSTALLATION METHOD
The installation combines the well known advantages of the
composite materials (chemical resistance, light weight, very long lifetime,
etc.) with an extremely easy and quick way of laying, thanks to our Jointing
Systems.
GRP uses the double O-rings bell and spigot
technology (with or without Locking Device): this is the most easy, fast and
safe method of pipeline installation. We can provide you with plain end
pipes with butt and strap joints and fittings, depending on the
specific installation needs |
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A WIDE RANGE OF FITTINGS
Fittings are manufactured by the hand lay-up, contact molding
and spray-up process. In hand lay-up and contact molding processes veil and
alternate layers of mat and woven roving saturated with resin are applied on the
mold. In spray-up process continuous strand roving is fed through a chopper gun,
combined with catalyzed resin, and sprayed onto the mould surface.
Continuous Elbows at various degrees;
Concentric and Eccentric Reducers;
Equal and Reduced Tees;
Fixed Flanges;
Stub Flanges provided with Steel or GRP backing ring;
Blind Flanges;
Caps;
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GRP can also provide you with special fittings,
fully prefabricated in accordance to your requests and ready to be jointed.
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