DOUBLE-WALL POLYETHYLENE PIPE

Double-wall polyethylene pipe

Double-wall polyethylene pipe has many applications in civil works such as water transfer, sewage, irrigation networks, drainage, surface water collection, bridge construction and….

Double-wall polyethylene pipes are produced in different types such as core-tube, corrugated, and spiral. The main advantage of double-wall polyethylene pipes is their high resistance to external load pressure. In single-wall polyethylene pipes, resistance to internal pressure is considered. In double-wall polyethylene pipes, the main goal of the design is to withstand the pressure of external loads. Among double-wall polyethylene pipes, double-wall polyethylene pipes with core-tube have special advantages. In terms of production, installation and operation, there are differences between different types of double-wall polyethylene pipes. Among these, double-wall polyethylene pipes with core-tube are the most suitable double-wall polyethylene pipes.

The intended applications include the collection and transfer of surface water and wastewater. This type of double-wall polyethylene pipes has an advantage in production compared to other types of double-wall polyethylene pipes. According to the production technology of this type of pipes, different sizes of pipes with different profiles can be produced simultaneously. This method increases the production speed. There are also no restrictions on connections.

Types of connection methods:

• Extrusion welding
• Electrofusion welding
• Ring and flange fittings
• EPDM gaskets

In addition, these pipes are produced in the states with/without socket and spigot. Other advantages of double-wall polyethylene pipes with core-tube include production in high diameters. At present, the company produces pipe up to 4000 mm in diameter. There are no restrictions for higher diameters. Also, due to the production technology, the inner surfaces of the double-wall polyethylene pipes with core-tube are very smooth. Therefore, by reducing the coefficient of friction, the hydraulic power of the pipe increases.

In addition to the above mentioned cases, the product quality of double-wall polyethylene pipes is very high. Unlike other similar pipes, these products are engineered products. For each project, a special double-wall polyethylene pipe with core-tube is designed and presented. The pipe is not provided with a specific ring stiffness. Production in any ring stiffness is a distinctive feature of double-wall polyethylene pipes with core-tube.

Types of double-wall polyethylene pipes:

• Double-wall polyethylene pipe with core-tube
• Corrugated double-wall polyethylene pipe
• Spiral double-wall polyethylene pipe.

If you have any questions or want to buy double-wall polyethylene pipe, you can do it online or call our sales department at +98(21)66475495 and +98(41)34328458.

Corrugated and Spiral double-wall polyethylene pipe

Corrugated and spiral double-wall polyethylene pipes have a number of properties and capabilities. But the advantages of double-wall polyethylene pipes with core-tubes are much more than this type of pipes. Double-wall polyethylene pipes with core-tubes are known as the product. In very important and special projects such as marine projects, double-wall polyethylene pipes with core-tubes are often used. The following are some of the most important features of corrugated and spiral double-wall polyethylene pipes. These features weaken and reduce their quality, capability and application:

• Limitation of larger diameters in production
• Use of special types of ring stiffness in several specific classes
• Lack of static calculations for each specific project
• Use of mostly Chinese production machines
• There is weakness in the socket section and complete sealing
• Limited methods of connecting pipes to each other

Advantages of double-walled polyethylene pipe

The original idea was to make a double-wall polyethylene pipe with a structural wall to save material consumption and increase their strength. The use of HDPE and PP materials along with the use of suitable structures, has made the polyethylene pipe with core-tubes to have many advantages. In the manufacture of double-wall polyethylene pipes of this company up to 4000 mm in diameter, the best type of raw materials and advanced German technology are used.

The main advantage of these pipes is having high resistance to external load pressure, with less weight than single-wall pipes. In single-wall pipes, resistance to internal pressure of the fluid passing through the pipe is considered, while in double-wall pipes, which operate at low and almost gravity operating pressures, the resistance to external loads such as traffic load and dead loads on the pipe is the goal which is the main reason in design.

The most important advantages of double-wall polyethylene pipes produced by Tadbir Novin Sazan Company:

 

• Long life (over 50 years)
• Flexibility and load bearing capacity
• Lower weight
• Insolubility, due to the polished internal surface of the pipe and its self-cleaning
• Resistant against most organic solvents
• Resistant to corrosive substances (acids, salts and alkalis)
• UV-resistant due to the use of materials (Anti-UV)
• Resistant to attack of rodents and microorganisms
• Easy to install and run quickly
• Easy shipping
• Possibility to use a variety of joints (extrusion welding, electrofusion welding, EPDM gaskets, and mechanical connection of rings and flanges)
• Proper hydraulic properties due to having flat surfaces
• Very good abrasion resistance
• High tolerance to traffic load
• Technical repair and welding even after operation