Large pipes are often used to transport drinking water in urban and rural areas, as well as to transport sewage and other waste materials, but their use extends even to chemical, pharmaceutical and packaging companies. Developed countries are still at the forefront of the production and consumption of large-sized pipes and fittings, and demand for these products is projected to increase dramatically in the coming years.

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Metal pipes, despite all the preparations, usually rust after a short time and are very difficult to install. In addition to all this, water and sewer pipes are usually located at a certain distance from the ground and they will not be easy to replace or repair. The industry of materials handling and hydraulic piping has presented a suitable option to various companies, which includes the use of pressure pipes and non-pressure pipes. These pipes are often made of durable materials such as PVC and significantly increase the useful life of local plumbing. Follow the continuation of this article to study this issue and review the types of materials that can be used in pipes and fittings of fluid materials.

() Because of the characteristics of the conical screw, the feeding section has a large diameter, and the heat transfer area and shear speed of the material are relatively large, which is conducive to the plasticization of the material. The screw diameter of the metering section is small, reducing the heat transfer area and the shear speed of the melt, so that the melt can be extruded at a lower temperature.

Azar Barzin G. Sepahan Company, year in a land with an area of thousand square meters and infrastructure of square meters with the aim of producing all kinds of PVC pipes and fittings from size to mm, in order to be used in sewage and water supply, telecommunications, electricity and A building was built. This company produces pp (polypropylene) pipes and fittings from size to mm for construction, urban, industrial, sanitary water supply and central heating installations and the transfer of chemicals, acids and compressed air in its production line.