Fiberglass pipes NTT PRO

a simple and inexpensive method of mounting GRP pipes on concrete or metal supports. This type of installation can also be used for both small and large pipe diameters, the only condition is that a suitably designed pipe support block is available for pressure pipes. The reinforced concrete support block must be designed to withstand the closed gate valve axial loads transmitted through nearby connection and to resist its movement.

Sanation (Relining)

Sanation of pipelines in cases, tunnels, collectors is an alternative method of laying and is characterized by fast installation of the reconstructed pipeline. For laying fiberglass-reinforced plastic pipes by sanation method they use pipes from 1 to 12 m DN300 up to 4000 mm inclusive, depending on the working procedure, size of starting and receiving pits, diameters of bore holes, deterioration of existing pipes, etc.

There are several methods of sanation:

Pushing

This method is recommended for long sections with pipes less than DN1400 mm to be sanitized. Pipes are lowered into a working pit or concrete chamber (before entering the collector or case) equipped with a jacking station and then pushed forward. The GRP pipeline moves on support rings in case of spacers option or on other support and centering elements.

In the case of short sections and light pipelines with a diameter of less than 1400 mm, the GRP pipes are pulled into the pipe case or collector to be rehabilitated not individually, but by plaits. The pulling is carried out with the help of a winch on sliding supports.

Cart transport

This method is used for the rehabilitation of large diameter pipes over DN 1400 mm and/or of long distance. Both motorized and manual carts are used for transporting pipes. They can be rented or purchased from the NTT Company or manufactured locally.

Underground laying

The most widespread type of laying of pipelines made of fiberglass plastic. Due to light weight and coupling connection, NTT products can be easily and quickly installed in a trench without expensive special machinery according to SP 40-104-2001 and SP 129.13330.2019.

The nominal ring stiffness (SN) of the pipes is measured in N/m² and varies in the following values:

SN 2500 - 1,000,000 N/m².

To choose the right type of pipe is important to know the pressure level of the system. Usually this value is between 10 and 16 atmospheres in water supply systems. For industrial water supply systems the water pressure is higher and can reach a value of PN 40. Fiberglass pipes are available in the following pressure types (PN):

PN 1;

PN 6;
PN 10;
PN 16;
PN 20;
PN 25;
PN 32;

The first three types are the most used. In case of hydraulic shock GRP pipes have a safety margin of 1.5 times more their nominal value.