Corrugated pipes for outdoor sewerage

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Corrugated pipes for outdoor sewerage
Corrugated pipes for outdoor sewerage
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Types of corrugated pipes for external sewerage, the choice of products for various operating conditions. Advantages and disadvantages of the line, the price of corrugated pipes for external sewerage from different materials.

Corrugated pipes for outdoor sewerage are multilayer plastic products for draining sewage from the house to the place of disposal. They are made of various plastics and are distinguished by their high reliability and flexibility. The properties of flexible pipes, their characteristics and price will be discussed below.

Features of corrugated pipes for outdoor sewerage

Corrugated pipes for outdoor sewerage

In the photo, corrugated pipes for external sewerage

The corrugated pipe for external sewage is a two-layer product, in which the upper layer is ribbed, in the form of an accordion, and the inner one is smooth. The ribs increase the flexibility of the line and allow it to bend easily without loss of strength. The smooth interior does not trap dirt and prevents sewer clogging. For connection with other pipes, special expanded or cylindrical sections are provided at the ends of the product, depending on the pipe brand.

The outer layer performs protective functions, and the rib stiffness of the flexible pipe depends on it. This value is the main parameter of the product and shows the ability of the line to withstand static and dynamic loads. The stiffness class depends on the thickness of the ribs and is controlled at the pipe manufacturing stage. It defines the maximum burial depth of the system or the permissible mechanical load on it. Stiffness is designated by the letters SN and is measured in kN / m2… Corrugated pipes are manufactured with stiffness SN2, SN4, SN8, SN10, SN16, SN32. For sewage, it is allowed to use products with SN4-SN16, but most often pipes with SN6-SN8 are used.

Flexible products are extruded from high-strength plastic and coated with a special substance to improve performance. Stores sell blanks made of polyvinyl chloride (PVC), low-density polyethylene (HDPE) and polypropylene (PP). Recommended dimensions of corrugated pipes for sewerage: inner diameter - 110-250 mm, length - at least 6 m. The longer the product, the fewer joints on the route and the more reliable the system.

Corrugated pipes may be cleaned chemically and hydrodynamically. The first is used to prevent blockages, the second is most often used to remove blockages or deposits on the walls. Mechanical devices can damage the quality inner surface and are therefore not recommended for cleaning.

The dependence of the depth of burial in the ground of the line on the stiffness of the corrugated pipe for external sewage and the load on it is shown in the table:

Place of installation Backfill soil composition Minimum stiffness, SN
Trench depth less than 3 m Trench depth 3-6 m
Dense soil Dense clay Loose clay Dense soil Dense clay Loose clay
Plot in the garden Excavated soil 2 4 8 4 8 16
Sand less than 22 mm 2 4 8 4 4 8
Pebbles, 4-22 mm 2 - - 4 - -
Low traffic area Excavated soil 4 4 8 4 8 16
Sand less than 22 mm 4 4 4 4 4 8
Pebbles, 4-22 mm 4 - - 4 - -
High traffic area Excavated soil 8 - - 8 - -
Sand less than 22 mm 8 8 8 8 8 8
Pebbles, 4-22 mm 8 - - - - -

Corrugated pipes for outdoor sewerage are classified by the number of layers in their structure and the brand of plastic from which they are made. Samples can be single-layer or double-layer.

Single-layer products outside the building are rarely used, only as additional protection for a smooth-walled pipe. Their main purpose is not related to drainage - they are used in the installation of cable routes.

To easily determine the parameters of the pipe, manufacturers have introduced special designations and colors. Flexible products for outdoor sewerage are easy to distinguish from pipes for other purposes. Outside, the surface is painted orange or black, inside they are light. Corrugated pipes for internal sewerage outside and inside are white. Blue products are for electrical cables.

All products are marked with an alphanumeric designation, which is applied by color printing along the axis or on the label.

Let us consider the features of decoding the designation of goods using the example of the KORSIS pipe DN / OD P 200 SN6 TU 2248-001-73011750-2005:

  • "Korsis" is the name of the trade mark.
  • DN / OD 200 - outside diameter. Inner diameter DN / ID may be present
  • P - pipe with a socket (or without it, if there is no letter P).
  • SN6 - stiffness class.
  • TU 2248-001-73011750-2005 - technical specifications for production.
  • OD is the outer diameter of a corrugated pipe for sewerage;
  • ID is the inner diameter of a corrugated pipe for sewage.
  • Other information may also be applied to the product - the year of manufacture of the product, the batch, etc.

In stores, you can buy a corrugated pipe for sewerage of Russian and foreign production. From domestic products, one can single out the products of the companies Politek, Polyplastic, Nasahorn, from foreign ones - OSTENDORF, WAVIN, FRANKISCHE. The Polytek company was founded for 20 years, therefore, the most modern equipment is located at its production facilities. The Polyplastic company is considered the largest in Russia producing plastic pipes. It manufactures the popular Korsis models, which have established themselves as high quality products in a wide range of sizes. Nasahorn is also a reputable manufacturer of sewerage system products that are sold in all regions of Russia.

Outer (OD) and inner (ID) diameters of corrugated pipes for outdoor sewerage from various manufacturers:

Product brand DN / DN Material DN (DN) ID OD Weight, kg
Magnum OD PE 110 91 110 0.95
Hydro16 OD PP 110 91 110 0.92
Vavin X-Stream ID PP 150 149 170 1.49
ProCan ID PP 150 149 170 1.49
Magnum OD PE 160 137 160 1.7
Hydro16 OD PP 160 139 160 1.64
Corsis OD PE 160 139 160 1.7
Korsis PRO OD PP 160 139 160 1.64
Magnum OD PE 200 172 200 2.3
Corsis OD OD PE 200 176 200 2.3
Korsis PRO OD OD PP 200 176 200 2.22
Vavin X-Stream ID PP 200 196 225 2.16
ProCan ID PP 200 196 226 2.16
MagnaPlast ID PP 200 197 226 -
PRAGMA / Pragma / Icaplast ID PP 200 197 225 2.5/2.3
Magnum OD PE 250 218 250 3, 5

Pros and cons of corrugated pipes for outdoor sewerage

Corrugated pipe for outdoor sewerage

Two-layer corrugated pipes for outdoor sewerage have the following advantages:

  • They do not react with aggressive chemical elements that are always present in sewage and in the ground.
  • They have high strength and low surface wear. They can withstand high static loads (from embankments) and dynamic (from traffic).
  • Safe for the environment.
  • The highway is easy to maintain.
  • For pipes made of plastic, grounding is not required, since products are immune to stray currents. Traditional steel and cast iron sewer systems located next to cable runs are aging rapidly and need to be replaced.
  • The price of a corrugated pipe for sewage is available to consumers with any income level.
  • Due to the flexibility to change the direction of the line, no fittings are required. Flexible products allow you to bypass obstacles and create tracks of any complexity.
  • Products are not destroyed by seasonal soil movement.
  • The pipes are white inside, which makes it possible to monitor the state of the highway using a television inspection.
  • The service life of corrugated pipes for external sewerage reaches 50 years.
  • The track is assembled without the involvement of special equipment.
  • The inner surface is very smooth and does not retain impurities even at small slope angles of the track and is rarely clogged.
  • The products weigh a little, which is convenient for transportation and installation. They are ten times lighter than their metal counterparts while maintaining high rigidity.
  • A track made of flexible elements can be easily repaired.
  • The pipes can be connected to any kind of storage.
  • Corrugated plastic pipes for outdoor sewerage are resistant to the microenvironment, which is formed as a result of the vital activity of microorganisms. The decomposition of sewage without oxygen becomes the cause of the appearance of an aggressive acidic environment that destroys concrete and metal structures, but not plastic ones.

Of the disadvantages of corrugated pipes for external sewage, the following can be distinguished:

  • Most products are afraid of ultraviolet radiation, so they should not be laid on the surface of the earth.
  • Only a few models retain their durability in cold weather.
  • Many corrugated pipes are afraid of fire.

Material of corrugated pipes for outdoor sewerage

To choose the right product, you need to know the characteristics of corrugated pipes and the area of ​​application. Consider the features of products from various types of plastic.

Corrugated PVC pipes for outdoor sewerage

Corrugated PVC pipes for outdoor sewerage

PVC products are very durable, which allows the system to be buried deeply. They can be laid on the surface of the ground, since they are not afraid of ultraviolet radiation and have excellent wear resistance.

The main characteristics of corrugated PVC pipes for outdoor sewerage are given in the table:

Options Meaning
Lifetime Over 50 years
Optimum operating temperature Up to + 40 ° С
Minimum operating temperature Up to -10 ° С
Relative linear expansion 6x10-5
Ultimate tensile load, MPa 30-50
Influence of ultraviolet radiation Color change possible
Chemical and biological resistance Resilient
Density, g / cm3 1, 36-1, 43

Polyvinyl chloride corrugated pipes for outdoor sewerage are divided into several types, which have their own field of application depending on the composition of the soil and the amount of drained waste:

  • Lungs… Used in areas with a large number of plants: lawns, vegetable gardens, flower beds, etc. They are mounted on the surface of the ground or at shallow depths. Products are characterized by low resistance to mechanical stress. The maximum load on pipes should not exceed 2 kN / m2… Stiffness class - SN
  • Light heavyweight… Capable of withstanding an average load of 4 kN / m2… Stiffness class - SN These products are used for collecting underground sewerage systems. They can be laid in areas with sparse traffic or under footpaths.
  • Heavy… Very strong pipes that can withstand heavy loads - more than 8 kN / m2… Marked with the designation SN8 and higher. Used for the construction of sewers under roads. The minimum burial depth is 8 m. They are rarely used in the private sector. The walls of heavy pipes are 25% thicker than those of light-heavy pipes.

The outer layers of corrugated PVC pipes for sewage, which are allowed to be laid on the ground surface, are painted black. They are not afraid of ultraviolet radiation, but they can lose color. Corrugated PVC products are easy to cut and assemble. They are produced without sockets. Pipes have one drawback - they burst in frost or become brittle. Therefore, in the northern regions, PVC pipes are not laid on the surface.

Corrugated polypropylene pipes for outdoor sewerage

Corrugated polypropylene pipe for outdoor sewerage

It is recommended to bury corrugated polypropylene sewer pipes in the ground with a large amount of sand and gravel. They are the most rigid of plastic products, therefore, the mains are allowed to deviate from a straight line only by a small angle.

The main characteristics of corrugated polypropylene pipes for sewage are shown in the table:

Options Meaning
Lifetime Over 50 years
Optimum operating temperature Up to + 95 ° С
Minimum operating temperature no restrictions
Relative linear expansion 12x10-5
Ultimate tensile load, MPa 28-36
Influence of ultraviolet radiation Loss of strength
Chemical and biological resistance Resilient
Density, g / cm3 0, 90-0.94

Corrugated polypropylene sewer pipes can be operated in any cold weather without losing strength. No other similar products can withstand temperatures below -20 degrees. Ring stiffness of PP pipes - not less than 10 kN / m2… They have high abrasion resistance and are not damaged by drains, which contain a large amount of solid particles. The products will withstand any acids and alkalis present in the soil or generated in the system.

The pipes are easily assembled and repaired using standard couplings and inserts. When installing corrugated polypropylene sewer pipes, it is necessary to control the flatness of the substrate under the main line, otherwise they may burst under load.

You will need fittings to assemble the line. They have various shapes and purposes: tees, protective couplings for passing through reinforced concrete, repair couplings, adapters for connecting to workpieces made of another material, etc.

Corrugated polypropylene sewer pipes are manufactured with a fixed length of 6 m. Stiffness classes: SN6, SN8, SN10, SN16.

Products of this type have high precision in the manufacture of mating surfaces, so their connection is reliable and tight.

Dimensions and weight of corrugated polypropylene sewer pipes:

Inner diameter, mm Outside diameter, mm Pipe length, mm Weight 1 kg / m SN4, SN8
93 110 110x6000 0, 6
160 137 160x6000 1, 3
200 227 200x6000 2, 3; 2, 7
250 282 250x6000 3, 5

LDPE corrugated pipes

Corrugated polyethylene pipes for outdoor sewerage

Corrugated pipes for sewage from low-pressure polyethylene (LPP) are the most flexible of such products. They are less demanding on the state of the substrate for the backbone, they can change the direction of the route to any angle.

The characteristics of corrugated polyethylene sewer pipes are given in the table:

Options Meaning
Lifetime Over 50 years
Optimum operating temperature Up to + 40 ° С
Minimum operating temperature Up to -20 ° С
Relative linear expansion 14x10-5
Ultimate tensile load, MPa 20-38
Influence of ultraviolet radiation Loss of strength
Chemical and biological resistance Resilient
Density, g / cm3 0, 948-0, 965

The stiffness class is SN4-16, but in the private sector, SN6 and SN8 are enough. In other words, pipes can be buried to a depth of 6 and 8 m, respectively. The minimum laying depth is 1 m. Products are distinguished by high mechanical strength at low temperatures, but they are afraid of high temperatures. They cannot be used to drain hot drains, for example, from a bath. They are also afraid of ultraviolet radiation. Polyethylene products stretch easily, so they do not collapse if the drains freeze, but the material becomes brittle in very strong cold. After the installation of corrugated HDPE pipes, the sewerage, buried in the ground, does not require insulation. Otherwise, the properties of HDPE products are similar to PVC pipes.

To assemble the route, a bell is provided at one end of the pipe, and a cylindrical section at the other. To connect, insert the cylindrical part into the extended part and slide it until it stops. There are also products without sockets. In this case, the workpieces are joined by butt welding using a special apparatus.

Dimensions of corrugated HDPE pipes for outdoor sewerage with a bell for the private sector:

Inner diameter, mm Outside diameter, mm Length, m Socket length, mm Pipe length with socket, m
250 282 6 165 6, 165
300 339 6 170 6, 170
400 455 6 175 6, 175

Dimensions of corrugated HDPE pipes for external sewerage without a bell for the private sector:

Inner diameter, mm Outside diameter, mm Length, m
250 282 6
300 339 6
400 455 6

How to make an external sewerage system from corrugated pipes?

Installation of corrugated pipes for outdoor sewerage

The installation of corrugated pipes for sewage is similar to the installation of smooth products, however, their flexibility must be taken into account. When building the system, pay great attention to the base.

Installation instructions for corrugated pipes for outdoor sewerage:

  • Dig a trench with inclined slopes of such a width that a gap of at least 20 cm remains between the track and its walls.
  • Make the bottom of the ditch at a slope of 2 cm by 1 m towards the drain. The angle will ensure the spontaneous movement of the drains.
  • Compact the base of the ditch and backfill with a layer of gravel and sand 10-15 cm thick. If the soil is loose, fill the bottom with concrete. The solution layer is 15 cm.
  • Lay the pipes so that the sockets are directed in the direction opposite to the direction of movement of the drains. They should fit snugly against the base. Make indentations under the joints if necessary.
  • After assembling the system, backfill the ditch with 10 cm thick sand. The top layer should be the soil removed by digging the ditch.
  • Install a double-layer corrugated pipe for sewage in dry weather at temperatures above +15 degrees. Such conditions will ensure the maximum tightness of the line.
Installation diagram of corrugated pipes

Installation diagram of corrugated pipes for outdoor sewerage

The way pipes are assembled depends on their design and the material from which they are made. During installation, follow these recommendations:

  • Before joining the pipes to the socket, check for O-rings in the socket and coat the surface with grease. Install the smooth part into the socket until it stops. To increase the tightness, the mating surfaces can be greased with silicone, having previously been treated with a sanding paper to improve the adhesion of the adhesive to the plastic. However, in this case, the connection will be permanent.
  • Corrugated pipes for external sewerage without sockets are welded using special devices - soldering irons. The device has flanges that simultaneously heat the ends of the elements to be connected. They are sold with interchangeable attachments that allow you to connect products of different diameters. Before work, it is necessary to heat the nozzles, put pipes on them, and then quickly press the workpieces together. After a short period of time, the material will harden and a monolithic structure is formed. The heating temperature for each material is different, it is indicated in the instructions for the device.
  • In some cases, the products are connected by a coupling with a rubber ring, which is installed in the groove of the corrugation. In this case, it is necessary to take into account the dimensions of the products. On pipes with a diameter of 250-100 mm, the ring is placed in the first groove, for products of smaller diameter - in the second. In this case, the profile of the ring should be directed in the direction opposite to the end of the pipe.
  • To connect the corrugated pipe with the sewage system and neighboring products, couplings of various designs and purposes are also used: bends, heat shrinkable couplings, tees, elements for connecting to products of other types, adapters to a different diameter.
  • For joining corrugated pipes with products made of cast iron, concrete or other material, couplings with an O-ring are used.

Price of corrugated pipes for outdoor sewerage

Outdoor sewerage from corrugated pipes

The following factors influence the price of corrugated pipes for sewage:

  • The material from which they are made… The cheapest are PVC products, the most expensive are HDPE.
  • Wall thickness… Massive products consume a lot of material, so their cost is higher. The stiffness class depends on the wall thickness. Therefore, we can say that the higher the rigidity, the more expensive the products.
  • Place of manufacture… The farther the goods are transported from the place of manufacture, the higher the transportation costs and the higher the final price of the corrugated pipe for external sewerage. Traditionally, the cost of domestically produced products is lower than the prices for foreign counterparts.
  • Product quality… This factor most of all affects the models that are connected by welding. To obtain a high-quality joint, it is necessary that there are no defects in the abutting surfaces - there are no cracks, ovality, the dimensions correspond to the declared values, etc. Therefore, before you buy a corrugated pipe for sewage at bargain prices, check its condition.

Average price of a corrugated polypropylene pipe for outdoor sewerage in Russia:

Outside diameter, mm Inner diameter, mm Cruelty class price, rub.
160 139 SN8 3040
200 174 SN8 4414
225 200 SN8 6487
250 218 SN8 7901

Average price of a corrugated polypropylene pipe for outdoor sewerage in Ukraine:

Outside diameter, mm Inner diameter, mm Cruelty class Price, UAH.
160 139 SN8 1350
200 174 SN8 2100
225 200 SN8 3050
250 218 SN8 3430

Average price of corrugated HDPE pipes for outdoor sewerage in Russia:

Outside diameter, mm Inner diameter, mm Cruelty class price, rub.
110 94 SN8 150
133 110 SN8 188
160 136 SN8 268
189 160 SN8 312
200 171 SN8 358
230 200 SN8 455
250 216 SN8 567

Average price of corrugated HDPE pipes for outdoor sewerage in Ukraine:

Outside diameter, mm Inner diameter, mm Cruelty class Price, UAH.
110 94 SN8 65
133 110 SN8 85
160 136 SN8 120
189 160 SN8 140
200 171 SN8 155
230 200 SN8 220
250 216 SN8 250

Watch a video about corrugated pipes for outdoor sewerage:

Thus, we can conclude about the practicality of external sewer lines from corrugated two-layer pipes. Products serve for a long time and reliably, and you can build such a structure yourself, saving money on assembly. But in order to create a reliable external sewage system from corrugated pipes, it is necessary to know the properties of each type of product so that the features of operation do not destroy it.

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