One of the most important and widely used pipes in the construction industry is polypropylene pipes or PP pipes. These polypropylene pipes are produced in different sizes and different applications. Two categories of application of PP polypropylene pipes are very common, the first category of polypropylene pipes used in building water supply, which is known as white pipes and is usually produced in sizes 20 to 63. The second category is polypropylene sewer pipes that are produced in higher diameters and are used in building sewage disposal. In the continuation of this PETROPROVIDERS article, join us to show you polypropylene pipe production.

Uses of polypropylene pipe

Uses of polypropylene pipe

Uses of polypropylene pipe

Polypropylene pipes have many applications. The most important of these is the construction of hot and cold drinking water networks of the building (white pipe or PP RC), construction sewage transfer, transfer of sewage buried in the soil, urban water supply, and industrial irrigation networks under pressure, compressed air transfer, central heating facilities, And air conditioning.

Differences between polypropylene and polyethylene pipes and advantages of polypropylene pipes

Polyethylene has good mechanical and physical properties, as described in the section on the manufacture of polyethylene pipes and the specifications of polyethylene materials. But not against heat, which is why they use polypropylene pipes or the so-called white pipe market is common for the transfer of hot water in buildings.

Of course, with the introduction of PEX multilayer pipe technology, which has a high resistance to hot water, these pipes are gradually giving way to PEX multilayer pipes, especially in the radiator and underfloor heating applications. However, due to the high price of multilayer pipes, and the widespread use of polypropylene pipes, these pipes are still widely used in the construction industry.

The next use of polypropylene pipes, which are also widely used, is in building and underground sewage. At present, due to the high chemical resistance of these pipes, their lightness compared to PVC sewer pipes, as well as their toughness and higher impact resistance in this type of pipes, their use is very diverse.

Other advantages of polypropylene pipes include non-corrosion, contact with drinking water and sanitation, proper pressure tolerance, acid and base resistance, and very low-pressure drop. In addition, these pipes have the characteristics of gas penetration resistance, easy forming, and connection, quick and easy installation, low weight and lightweight, frost resistance.

The size of the outer diameter of the most widely used polypropylene pipes in water supply applications, depending on the type and place of application, is usually the outer diameter of 20 and 25 mm. Also, the most widely used size of these pipes in sewage applications is 110 and 125 mm.

When producing polypropylene pipes, care must be taken that the pipes are not exposed to direct sunlight and try to cover them after installation. In the surface system, be sure to use clamps with appropriate distances.

Polypropylene pipe production line specifications:

The common dimensions of polypropylene pipes that are produced in the country are usually from 20 to 63 mm in outer diameter. The following specifications are provided for the production of these dimensions:

1- Extruder and polypropylene pipe production:

  • The extruder required for a single-screw machine is the ability to produce from size 20 to 63.
  • The cylinder and screw must be made of hard steel.
  • Convenient and conventional output capacity for the extruder is at least 180 kg per hour
  • The heater used ceramic type
  • In these extruders, usually, 5 cooling fans with a power of 120 watts are used
  • The gearbox must have a power of at least 50 kW
  • The suitable helix diameter is 65 mm and the L / D ratio is 34
  • Heads and molds of sizes 20 to 63 should be placed on the extruder and also suitable calibrators of each size should be installed.
  • The best materials for calibrators are bronze and brass alloys

2- Vacuum tank:

  • The production line must have a vacuum tub at least 6 meters long.
  • A vacuum pump with a capacity of at least 7 kW or 110 cubic meters is required.
  • The sprinkler pump for cooling the production pipe must have the same power.

3- Cooling tub:

2 cooling tubes with a length of at least 6 meters are required, cooling is done through a sprinkler system.

The material of the tub should be at least galvanized. It is better to use water with suitable hardness so that the sprinkler holes do not become clogged.

4- HAUL OFF or lethal device:

The HAUL OFF device is usually a 2-rail chain gear that has about 70 blades and is controlled by a solenoid valve.

5- It is also used for ancillary equipment such as cooling towers, electrical panels (PLC), and pipe cutting machines.

In addition to white pipes, water supply polypropylene pipes are also known as PP-RC pipes, which means the use of random polypropylene copolymer materials. Of course, the use of other polypropylene materials such as polypropylene homopolymer (PP-H), polypropylene block (PP-B), and polypropylene RCT is also allowed.

A detailed description of the polypropylene pipe production process

description of the polypropylene pipe production

description of the polypropylene pipe production

The first step in making polypropylene pipe is feeding. Feeding can vary from its most basic form, ie manually to automatic mode. In the automatic mode, there is a warehouse or silo of raw materials that, depending on the user, can be stored in the production line for a full capacity of about 1 day to use for feeding.

Temperature and humidity control in silos is very important to eliminate their destructive effects and also its material should be such that it does not react with the polypropylene materials used.

The transfer system is used to transfer materials from the warehouse or silo to the extruder. The best and most advanced transmission system is the suction system. In this system, the material is transferred to the extruder funnel by vacuum pressure and a strong sucker pulls the items into the extruder funnel.

Summary of polypropylene pipe production review

In this article, we discuss the production methods of polypropylene pipes and the conditions for doing so. These methods increase the efficiency of the production process of this polymer.

Production units are required to use food contact materials and have a health certificate to prevent pipe health problems. In addition, they must observe all health points in the production process and obtain a license from the Ministry of Health in this regard.

However, laboratories are required to perform microbial effects on drinking water, which are expensive and long-term tests, if the production unit does not provide a license from the Ministry of Health. For this reason, their production units should apply for a health license.

What is your opinion about polypropylene and the use of PP pipes in the industry? Are polypropylene pipe production methods effective? Is this substance harmful to human health? In the comments section, you can ask your questions from our experts.

What are the most important applications of polypropylene pipe?

This polymer is used for the storage and handling of water, industrial applications, and chemical applications.

Is it good to use polypropylene pipe?

Yes! This polymer has a reasonable price and is very useful for use in various industries. PP has a high resistance to heat and temperature rise.

Is it right to use polypropylene pipes to drink water?

Yes! This polymer, if used for drinking water, is not harmful and does not enter the human body with various chemicals.

Is PVC the same as polypropylene pipe?

No! We know that polypropylene is composed of propylene monomers. In addition, PVC is composed of vinyl chloride polymers.