• Polyethylene pipes and fittings are resistant to chemicals and do not suffer from corrosion. For this reason, in projects where metal or concrete pipes and fittings suffer from rotting and corrosion, polyethylene pipes and fittings stand out with strength.
• Polyethylene joints have the same resistance as the main pipe, and in case of standard welding, the piping system will be completely uniform.
• Polyethylene pipes are flexible and therefore these pipes can be resistant to earth movements and earthquakes and can withstand severe stresses easily. This feature greatly reduces the cost of repairs or reconstruction of transmission lines.
• Polyethylene materials with products in pressures between 2 to 25 bar and even more and in sizes from 20 mm to 2000 mm and even more can meet all the needs of an industrial project.
• Polyethylene pipes, fittings and manholes have a much lower cost of chipping and bedding than their metal or concrete counterparts, and even in some projects, it does not require bedding.
• Polyethylene products, including polyethylene pipes, polyethylene fittings and polyethylene manholes, have a very long service life (over 50 years).
• Polyethylene pipes, fittings and manholes are resistant to biological attacks, therefore it can be used to transport urban drinking water and it does not need to process the pipe to transport drinking water, which can reduce implementation costs by 50%. .
• Polyethylene pipes, fittings and manholes have a light weight, which makes the transportation of these equipments easier than metal and concrete samples, and reduces implementation costs and a higher speed of transfer from the place of production to implementation.
• Polyethylene pipes, connections and manholes are environmentally friendly and waste less energy due to the lack of insulation, and less greenhouse gases are produced in their production. In addition, due to the possibility of returning polyethylene pipes and fittings to nature, they do not cause environmental pollution and can be converted into energy again after the end of their service life.
• Polyethylene raw material allows to achieve better functions by changing it and it is possible to convert it into products with higher efficiency.

(quoted from Pars Ethylene Kish website)