Recycling plastics, polyethylene, cellophane and their derivatives is not as expensive as troublesome, low-income, especially in the early stages of development. In this regard, wherever you look, you will see scattered packages, bottles, various parts of household equipment. Though take and do not do anything from plastic. True, there is one area of production where the use of this material brings much more benefit and requires almost no disposal. We are talking about plumbing and plumbing systems. Let's talk about polypropylene pipes manufactured under the trademarks “Corsis” and “Pragma”.
Purpose and scope
Polypropylene pipes are designed for non-pressure passage of industrial liquids, sewage and storm water, solving problems of water supply and sewage outlet. The sewerage pipe "Pragma" and "Corsis" successfully cope with all these functions. Design features greatly simplify the laying and operation of pipelines. They are used both for underground and outdoor (surface) laying in various regions of the country, in different climatic latitudes. Since the product of the company "Pragma" and the pipe "Korsis" technical characteristics, purpose, design, and appearance (except for coloring) are almost the same, we can consider them with a general example.
Main characteristics
The product is a two-layer pipe made by extrusion (joining layers) of polypropylene with various additives. The inner working layer is smooth, which prevents the formation of blockages. The outer corrugated layer is responsible for protection against mechanical damage during installation and transportation, as well as against soil pressure during operation. The pipe "Korsis" technical characteristics has the following:
- diameter - from 110 mm to 1200 mm;
- bookmark depth - from 1 to 15 m;
- working pressure - up to 10 atmospheres;
- weight of one running meter - from 1.2 kg to 50 kg;
- ring stiffness - 2-16 kN / m 2 .
Modification of corrugated pipe “Corsis”
All pipes with a Korsis double-layered profiled wall are produced in 6 and 12 meters lengths painted black on the outside. The internal color of the Korsis-PRO series is light blue. The product is characterized by increased ring stiffness - 16 units (SN indicator). This allows laying to maximum depths of up to 15 meters. The SN indicator itself, depending on the diameter, thickness and structure of the wall in the pipes, can be 2, 4, 6, 8, 10, 16 and 24 kN / m 2 . The smallest - in pipes of the ECO series made of recyclable material.
Korsis pipes, the technical characteristics of which are specially adapted for external installation, are produced in the SVT (spiral-wound) series. The outer color is black, the inner is white. The IZO-Korsis series is specially designed for operation in conditions with low temperatures. Another Korsis pipe has technical specifications that are as large as possible (diameter, wall thickness, ring stiffness). It goes on sale under the PLUS series. The diameter of such pipes is 2400 mm. The APM and CBT series have similar properties. When choosing corrugated polypropylene pipes, always be guided by the index of ring stiffness. Better to purchase a series with increased rates.
Installation of pipelines
As with any other pipeline construction, you first need to dig a trench, then make a pillow of sand. Only then comes the Korsis pipe. Technical characteristics of this type of pipe require the arrangement of not only a sand cushion, but also filling the entire body of the pipe with fine-grained sand. This is necessary for the design of the corrugated outer layer. Thus, the entire load is distributed directly to the stiffeners.
Two types of installation are provided for joining: socket and welding. The connection with the help of the coupling is as follows: first, we put on an o-ring on one pipe (depending on the diameter of the first or second groove). Then we put on the coupling. Now we put the ring on the second pipe and insert it into the first sleeve.
The technique of joining by welding is no different from joining any other types of polymer products. Korsis pipes of large diameters are produced with a bell. Its length is from 97 to 433 mm. Using a welding machine, heating the thin end and the end with a bell, and then, inserting them into each other, we get a strong and reliable joint.
The advantage of corrugated pipes
A lot can be said about the advantages of polypropylene corrugated pipes . Here, speed, ease of work, and material savings plus human resources. Enhanced performance and environmental compliance are also pluses. But the main advantage of the Korsis pipe is the technical characteristics that allow it to be used in unstable soils, in permafrost conditions. And the two-arch form of the corrugated surface is able to withstand increased loads in any adverse temperature conditions.