The GRP pipe is made up of a slurry that has been reinforced with glass fiber. The construction of these tubes is based on the continuous process of continuous screwdriving. This process can be used for continuously filming the glass along the tube, along with the chopped clippings, which mix in different directions. Provides pipes. The use of continuous fibers in this direction increases the strength of the pipe and reduces its production cost. In this method, three main types of raw materials are used to create a compact layer with maximum efficiency. In addition to resin, continuous glass fibers and cuttings are used together to create high ring strength and strengthen the axial strength.
Application of GRP pipes
Transferring chemical corrosive liquids such as acids and bases
Sewage systems for refineries and petrochemicals
Lines under the sea
Advantages Grp Pipe
Full vacuum resistance
Minimum life span of 50 years
Resistance to corrosion and no need for indoor and outdoor coating
Production capability in long lengths (12-6 m)
Good mechanical strength and absorption of impact forces due to elasticity
The surface smoothness of the inside of the pipe and therefore the lower pressure drop than some of the tubes
Light weight and faster installation
Use of two-way couplings to connect pipes to each other and the use of fiberglass flange to connect to other types of pipes
The possibility of underground pipes laying up to a maximum depth of 16 m (load bearing soil) and at least 1 m (carrying traffic)
The production is 100 to 2400 mm in diameter, up to 32 times the working pressure
Connection type: There are two general methods for connecting GRP pipes: 1- mechanical coupling 2- welding joints
The most important type of coupling is the Bell and Spiegot mechanical coupling (male and female with ringing and locking), but in the oil and gas and petrochemical industry, the acceptable coupling method is the welding method. In the welding joint, a polymer bond between the two tubes is performed through glass fiber layering And the resin is proportional to the pipe material and, in fact, the two tubes are integrated with each other in the boiler interface.
Types of fittings: For these pipes, there are standard types of fittings such as three-way, three-way, knee-down, transformer, and various types of flanges by manual layout.
Specifications for Grp Pipe
GPR pipes are made and tested according to AWWA C 950, DIN 16868, ASTM D 3517, ASTM D 3262 standards. The pipes are nominally rated from 100 to 2400 mm in three standard standards (2500, 5000 and 10000 N / m2) and a compression rating of 32-6 bar. The length of the pipes in the pipe diameter is 12-6 meters. The type of pipe fittings for gravity (and pressure) sewage networks is important for the external water leaks into the pipes inside the pipes, and the pipe manufacturer is required to provide the type of connection and sealing pipe according to the relevant standards.