Benefits of PE Manhole Instead of GRP Manhole
Sewage network Contains, sewage transfer Networks, Polyethylene Manholes, Pumping Stations and refinery.In This matter manholes to be used for Inspection and supervision of sewage networks and installed in specified distance.
As the importance of manholes in the sewer network review of their qualification and determinate the performance is a very sensitive issue.
the construction of GRP manholes are resin, polyester and gravel , therefore to reduce the price of GRP manholes in combination increase the amount of gravel.So the friability of manholes proliferate , It Also can be used inferior resin to decrease ,The Price too
if the Stand and resin used based on standard in production of GRP manholes, Extraction of Them , costs higher PE Manholes .
According to the Structure of GRP manholes and Connecting GRP Plate to the bottom of GRP pipe, for making the base of Manholes, with clue, accordingly the base of manholes is not sealed , and it cannot be resistant to the shock of the floor. they will be fracture over time and cause the liking of swages to the ground .Hence PE Manholes are fully integrated and sealed .
GRP Manholes are much heavier than polyethylene manholes .Therefore the crane should be used to move them. while PE manholes can be moved by hand. As result transportation of PE manholes will be Conducted with greater ease and lower cost.
Polyethylene Manholes are Light, That is why the speed of erection is so fast, connecting and sealing is cloddy.In GRP Manholes, Stairs are connected to the body with bolts Based on experience , at the junction of stairs to the body, because of effecting.
the torque exerted on stairs and also rising gases from sewer , GRP manholes break so easily .while stairs in polyethylene manholes are injected and can tolerate the weight up to 200kg.