Plastic pipes for storm water. Pipes for storm sewers: principles of use and installation. Cast iron pipes

Storm sewer is an external system for draining water that flows from the roofs of houses and other structures outside the site. Stormwater drainage elements are placed along the perimeter of buildings, since it is there that the bulk of atmospheric precipitation flowing down from the roofs is collected.

We are talking about rain and melt water. Storm sewer leads unwanted water from the foundation of the house, thereby protecting it from destruction. Some inexperienced developers confuse stormwater and external drainage systems, but these two are absolutely different systems Location on. Pipes for storm sewer differ from the pipeline for drainage - they are solid, without holes. The depth of the pipeline is also different, because since the storm drain is designed to collect water that is on the surface above the ground, there is no need for deep burying of the elements.

Do-it-yourself stormwater

Installation of storm sewers can be done independently or with the involvement of qualified specialists. Calling the master will save time and physical strength, because you need to spend a decent amount earthworks. However, do-it-yourself storm sewers will help save finances, which are never superfluous, and nothing complicated in installation work ah no. Low level pipe laying is another reasonable reason to install storm sewers on your own.

The construction of storm sewers can be divided into several stages. The key ones are:

1. Carrying out a preliminary calculation and drawing the layout of all elements of the system.
2. Digging trenches.
3. Pipeline installation.

Calculation rules

The calculation of storm sewers is milestone construction, on which correct location elements on the site and the successful functioning of the system. To carry out the calculation, it is necessary to study in detail the requirements and recommendations of SNiP 2.04.03-8, which contains all the necessary formulas and rules for choosing materials.

There is a whole list of output data that you need to have in order to calculate storm sewers. So, the following must be taken into account:

• The average monthly amount of atmospheric precipitation in the area;
• Features of the soil on the site;
• frequency of precipitation;
• The area of ​​the roof from which rainwater flows;
• The location of the underground communication near the structure.

The main document that regulates the rules for calculating and installing storm sewers is SNiP.

Calculation of the maximum system performance

In accordance with the instructions of SNiP, the fundamental parameter that needs to be calculated for correct installation storm sewer is maximum flow liquids. The formula for calculations is given by SNiP and is as follows:

V = q20 * S * D, where

V is the maximum flow rate of the liquid;
q20 is the intensity of precipitation in a given climate zone(this is a reference value, the value of which must be taken from the tables that are in SNiP);
S - roof area;
D is the moisture absorption coefficient of the material.

The moisture absorption coefficient is a reference value, which depends on the material of the roof or other surface (bitumen, crushed stone, asphalt concrete, cement concrete). The value of moisture absorption for a particular material is also in the set of rules for SNiP.

The choice of pipes for sewerage

Pipes for storm sewerage are not laid to great depths, do not transport liquids of high temperature or pressure, and therefore do not have stringent requirements. SNiP allows the use of any type of pipeline - both metal and asbestos-cement or plastic. However, most often it is a plastic pipe for storm sewers that is used. This is due to the fact that it is lightweight, easy to install and maintain, and has an affordable cost.

The most popular storm sewer pipe size is 110 mm.

Some requirements for gasket material storm system yet there are. The main characteristics that a storm sewer pipe must meet are:

• Frost resistance. The destruction of the pipeline under the influence of negative temperature should not occur;
• Resistance to the effects of chemically active substances that are in the soil;
• Anti-corrosion resistance;
• Low coefficient of roughness;
• high throughput;
• Small hydraulic resistance;
• Large length of pipeline cuts to simplify installation work.

Asbestos-cement pipes

Asbestos cement is reliable and durable material, which has been used for a long time for storm sewers. Among the advantages of an asbestos-cement pipeline can be enlisted:

• High strength;
• Corrosion resistance;
• Low coefficient of linear expansion;
• Low thermal conductivity;
• resistance to destruction;
• No hydraulic resistance.

However, asbestos-cement pipe is used less and less in modern systems storm sewer. It is related to such negative qualities, as:

• The significant weight of the products complicates the installation work;
• The fragility of the material, which requires extreme caution when transporting and laying the pipeline;
• The outer part of the pipe begins to decompose when it is underground for a long time, as a result of which it loses its strength;
• Failure to comply with environmental regulations, which caused a ban on the use this material in a number of foreign countries.

Metal pipe

The metal pipe is the best choice for laying the storm sewer system in places with high mechanical stress. This setting has metal products became the main reason for their use in places where highways and airports pass. However, a number of negative qualities forced individual developers to make their choice in favor of plastic. The disadvantages of a metal pipe for storm water are:

• Large weight of products;
• The complexity of the installation work;
• High price;
• Low corrosion resistance;
• The need to use a large number of additional fittings.

Metal pipes for storm water

Storm sewerage (or, as it is sometimes called, “storm drain”) has one and only purpose, namely: to ensure the effective outflow of rainwater from the place of its accumulation on the site. And it can be of three types: open, closed, combined. In the last two cases, it is absolutely necessary to use pipes for storm sewers. In the old days, the choice of material for such pipes was small: in most cases, it was done with an ordinary asbestos pipe. Today, the choice on the market is so great that, perhaps, a beginner will become frankly uncomfortable among all this diversity. So what should be considered when choosing the right storm pipe and which pipe, in the end, is it better to buy after all?

Advantages of using a storm sewer pipe

Modern high-strength plastic pipes for storm sewers - withstand heavy loads, are environmentally friendly, easy to operate and install, and at the same time have a relatively cheap cost.

It is the pipes that can provide a long and efficient work the entire stock system. And this becomes possible due to a number of quite objective reasons:

• modern pipes are strong enough and can withstand very large mechanical loads and powerful water pressure;
• they are impact resistant chemical substances;
• they are made from environmentally friendly materials without the use of toxic substances, so that even in the case of a really intensive outflow, poisons and toxins will not be washed out of them;
• such pipes are quite cheap in comparison with obsolete asbestos ones (however, asbestos pipes are still used in many cases);
• they are light in weight. Consequently, they are easy to transport, and their laying does not require the involvement of specialized heavy machinery and specialized equipment;
• they are easy to work with: even a beginner can install a drainage pipe.

Requirements for storm sewer pipes

In the arrangement of storm sewers, pipes made of modern durable plastic are in great demand. They have a number of advantages − a light weight, wear resistance, good carrying capacity and easy maintenance.

When choosing desired pipe it is necessary to take into account the compliance of the storm sewer pipe with parameters such as:

• sufficient mechanical strength to withstand the load from the poured soil. In this case, it is also necessary to take into account possible loads on the soil itself: the passage of cars, the passage of pedestrians, etc.;
• As far as heat resistance is concerned, sewer pipes resistance will be the decisive factor. low temperatures so that they do not freeze. In almost one hundred percent of cases, the operation of such pipes is not associated with elevated temperatures;
• but there are certain requirements for resistance to chemicals. After all, the pipes have to long time withstand contact with the ground and with water waste, which may contain certain chemical compounds;
• the throughput of the pipe must be taken into account. It is determined by its diameter. When choosing a pipe of one diameter or another, the load on the system must be taken into account. However, in the vast majority of cases, a pipe for storm sewers with a diameter of 100 - 110 millimeters will be enough. It should also be borne in mind that if it is necessary to clean the pipe under water pressure with a diameter of 200 millimeters or more, it will be necessary to involve special professional equipment;
• inner surface stormwater pipes should be as smooth as possible. This is necessary so that waste and other debris do not accumulate in the bumps.

What are storm sewer pipes made of today?

Among all the really large variety of pipes for storm water, only a few of the most common materials can be distinguished:

• asbestos;
• plastic;
• fiberglass.

And in order not to make a mistake with the choice of material, you need to have at least general idea about the pros and cons of each of these types.

For storm sewers from the most commonly used pipes from the following materials: fiberglass, PVC, plastic and asbestos.

Pipes for storm sewers made of asbestos

Perhaps the most "ancient" type of pipes, once common everywhere, but, however, has not lost its attractiveness today. The main advantages of asbestos pipes can be considered their resistance to decay, corrosion, as well as excellent ability to withstand even the most extreme loads. In addition, they have poor thermal conductivity.

asbestos pipes heavy, so special lifting equipment may be required for their installation and installation.

At the same time, they are not without drawbacks. Asbestos pipes for storm drains are quite heavy. So installation can be difficult. on your own. In addition, they are very fragile and are able to collapse upon local impact. Especially often this happens during installation and during transportation. In the case of working with asbestos pipes, it is quite difficult to waterproof them at the joints. On top of that, asbestos is not considered environmentally friendly. safe material. In some countries it is completely banned.

PVC pipes

More modern material, from which pipes for storm sewers are made, is PVC - polyvinyl chloride. Rigid single-layer ones are produced by the domestic industry with a diameter of 110 or 160 millimeters. Those. pipes that are intended for sewerage installation have a specific orange color.

They are strong enough and allow laying to a depth of 4 to 10 meters, they are structurally provided with elements for connection and even rubber seals. PVC pipes have a perfectly smooth inner surface, so they are the best suited for sewage.

PVC pipe for storm sewers has a smooth inner surface and a rubber seal, which improves docking and sealing during installation of the system.

At the same time, you need to be aware of their shortcomings: the limited length of the element (only 3 meters), as well as increased rigidity, which can be a problem when arranging a curved sewer system.

Plastic pipes for storm water

Today, the most common pipes for equipment, without a doubt, are plastic multilayer pipes. They can be made from both polypropylene (PP pipes) and polyvinyl chloride. But most often they are made of multicomponent material. Moreover, the inner layer consists of their polyethylene low pressure, and the outer one is made of rigid polypropylene. The outer surface of such pipes is corrugated, so that stiffening ribs are formed in this case. Thanks to them, the pipe can withstand quite considerable external loads.

The photo shows that plastic pipes are corrugated on the outside, but at the same time they have a smooth inner surface, which provides it with optimal strength, as well as flexibility and elasticity.

At the same time, plastic pipes have remarkable flexibility, so that they can be used to implement almost any storm drain on the site without the need for adapters and swivel elements, as is the case with PVC pipes. Structurally, plastic pipes can provide two types of connections:

• through the spigot system. In this case, special O-rings from rubber;
• without a socket - the connection is made by welding or using couplings.

Fiberglass rainwater pipes

At industrial facilities (very rarely - at summer cottages) fiberglass pipes are often used. They are available in large diameters and are used in reinforced storm sewers that have to work with really large water flows.

Important! Even with their very considerable dimensions - length from 6 to 12 meters and diameter from 50 cm - fiberglass pipes have a relatively small weight, and therefore are easy to install. In addition, fiberglass is a completely non-toxic material.

Even after a long stay underground, it does not decompose and is not susceptible to corrosion. It is absolutely chemically neutral, so fiberglass pipes can be installed anywhere and in any kind of soil. The guaranteed service life of such pipes is 50 years.

The pictured sewer pipes are made of fiberglass, they are equipped with rubber sealing rings and are more often used in industrial facilities.

The connection of fiberglass pipes to each other is carried out by means of special two-cone couplings. In principle, there is still such a type of material as reinforced concrete, but its use is limited. road construction, as well as on large industrial enterprises. So that reinforced concrete pipes for storm sewers, it would hardly occur to an ordinary owner to install on the site.

If you follow some simple tips, then the installation of a storm drain will not cause noticeable difficulties, and the design itself will serve faithfully long years. As a rule, it is not necessary to lay pipes too deep: after all, storm sewers usually function only in the warm season, and therefore you should not be afraid of freezing.

But what should be given special attention is the tightness and reliability of pipe joints. Breaking the connection will inevitably lead to leakage and even a break in the sewer. Before installation, be sure to ensure that optimal slope the bottom of the trench. It will be enough to have 1-2 centimeters of difference in height for each meter of pipe. The pipes themselves must be laid on a special sand cushion from 10 cm thick. The pillow is carefully spilled with water. You can also use geotextiles.

The corrugated pipe is laid in a trench on a dense cushion of crushed stone or sand covered with geotextiles - this will improve the operation of the storm sewer system.

Before burying the trench, it is necessary to carry out a test run of water. Most often, in this case, a bucket of water is simply poured into the system and the amount of water released from reverse side. Its volume should also exactly correspond to one bucket.

What the experts say

Even with a low probability of stormwater freezing, it is still better to lay pipes below the level of soil freezing. If this is not possible, then it is recommended to insulate the pipe, and the insulation itself is also additionally moisture insulated, for example, by wrapping it with the most common polyethylene.

It is necessary to carefully approach the choice of pipes for storm sewers. It is better to weigh everything once again properly than to face the extremely unpleasant need to redo everything later.

To drain rain and melt water from the roof of the building from the building, there is a storm sewer: pipes for it are selected in accordance with the load, as well as operating conditions. They, as well as gutters, storm water inlets and trays, are components of this system, which is simply necessary not only for the normal functioning of the building, but also for maintaining its integrity and durability.

How is storm sewer arranged?

In order to choose the right pipes for storm sewers, you need to know how this system works and operates, what are its main functions and features. As mentioned above, its main purpose is to divert sewage and rainwater from the building, and remove the incoming moisture to the drainage. There are two options for the system device:

1. open system. The open system consists of trays and gutters, wastewater enter it throughout, they are discharged into channels through which water is removed outside locality or industrial facility. It is used at rather small volumes of drains.
2. closed system. It consists of pipes laid underground, through which effluents enter the storm water inlets, and from there to the sewer pumping station.

Both types of storm sewers are an extensive network of elements laid at a certain angle, along which moisture, under the influence of gravity, flows into storm water inlets and is discharged outside the object. The main functions that the stormwater performs are:

• Basement flood protection and ground floors, as well as the foundation of the building - from dampness and cracking.
• Prevention of ice formation and accumulation of water on sidewalks and roads.
• Preservation of slopes from erosion, and soil from waterlogging.

Based on the conditions of use, it is obvious that rainwater pipes can be laid both underground and on top of it and, therefore, must be adapted to these conditions.

How to choose pipes for storm water

Requirements that rainwater pipes must meet

As already mentioned above, storm sewer pipes can have both above-ground and underground laying, and must be resistant to the types of influences that are subjected to during operation. In general, the list of requirements for pipe material looks like this:

• Strength. This mainly includes resistance to mechanical influences: pressure, both external and internal, as well as shock loads. Storm sewers are built for several decades of use, and therefore, strength and durability are its essential properties.
• UV resistant. Where pipes pass over the soil surface, they are exposed to sunlight, therefore, the use of a material sensitive to this factor will lead to a decrease in the strength of individual sewer fragments.
• Resistance to aggressive reagents. These substances are rare in sediments, and in melt waters may be present in large quantities, since in winter they are actively processed roadbed, therefore, it is worth considering this moment.
• Resistant to temperature extremes. Some types of plastic can withstand high temperatures well, and when sub-zero temperatures become brittle, such pipes can be used with great care, located where they are not threatened by mechanical stress.

Materials used for storm sewer pipes

Based on the above properties, we can say that in order to build a drain from sewer pipes, the following materials are suitable:

• Cast iron. This material has high strength and resistance to both temperature and chemical influences, you should not just place it where possible impact loads, since cast iron exhibits brittleness under such conditions. The disadvantages of cast iron are its high cost and high weight, which makes it difficult to install the system.

• Polymers. These include polypropylene, low-pressure polyethylene, polyvinyl chloride. Modern polymer pipes for storm sewers are easy to install, high strength, and a water-repellent inner surface that prevents pipe clogging. Another advantage is their affordable price. For the installation of storm sewers, both smooth and corrugated polymer pipes are used.

• For stormwater wells or for laying storm sewers under the road, reinforced concrete pipes are used. large diameter, providing high conductivity of the system and its proper durability.

When selecting pipes for storm sewers, not only the material is important, but also their diameter, so that the capabilities of the system correspond to its load. An insufficiently large diameter will lead to overflow, and an excessive diameter may turn out to be unclaimed and require large financial investments.

For storm sewers of private houses, a diameter of 110 mm is most often used.

Installation of storm sewer pipes

When laying storm sewer pipes underground, a network of trenches is dug, their depth should not be less than the level of soil freezing. A diagram is drawn in advance, where the laying of channels, the placement of collectors are noted, all this is done taking into account the characteristics of the terrain.

It is obligatory to observe the slope, on average it should be 2-3 cm per meter of pipe length. Mandatory sand or gravel cushion, which is laid. The instruction also provides for the presence of special revision inserts, usually they are located near turns where there is a risk of clogging.

Installation of pipes is carried out using special fittings, which can provide a connection both in a straight line and at an angle.

The pipes are poured in two steps - the initial backfill is tamped, after which the procedure is continued, so the pressure of the earth on the sewer is reduced.

The device of a storm sewer and the selection of pipes for it is not associated with great difficulties and costs, but it brings tangible positive results both in the short term and in the long term.

The choice of pipes for stormwater equipment and their correct installation - crucial point throughout the process of designing and building this system.

Long-term and trouble-free operation of the entire storm sewer directly depends on the quality, throughput, slope, depth, as well as on the condition of the joints of these drainage underground highways.

It is through them that rain or melt water is drained and transported from (drainage systems, funnels, etc.) through a number of revision or technological wells into the post-treatment system, onto or into storage tanks.

In all types of storm sewers, the movement of water is carried out by gravity, without the use of external compression. Thus, special requirements for a certain pressure to storm pipes not presented.

The only criterion for mechanical strength is the ability to withstand the weight of backfill soil.

The requirements for heat resistance of pipes are also reduced to a minimum - their operating conditions are under no circumstances associated with high temperatures.

The main thing is that the material of manufacture does not lose its strength qualities when negative values temperatures .

A properly planned and installed storm drain does not imply stagnation of water in the pipe cavities, so there is practically no risk of “defrosting” of the system.

Stormwater pipes are constantly underground, i.e. are exposed to active chemicals found both in the soil and in the discharged waters.

Thus, one of the main requirements for them is chemical inertness, resistance to corrosion.

The most important parameter of the stormwater pipeline system is their capacity. The required diameter is calculated at the sewerage design stage, taking into account the planned system performance.

As a rule, pipes with a diameter of at least 100-110 mm are used for these purposes.

Condition reliable operation the sewer system will also have a minimum hydraulic resistance in the pipe cavity.

Their inner surface should be as smooth as possible to avoid the formation of accumulations of sand, dirt and debris.

The length of the produced pipes is different, but during installation work it will be much more convenient to use the longest ones - this is profitable and economical, and the number of joints is significantly reduced.

The main types of pipes for storm sewers

Asbestos-cement pipes

In storm sewer systems have been used for a long time. They are distinguished by high mechanical strength, durability, low coefficient of hydraulic resistance.

Such pipes are not subject to rotting and corrosion.

They have low thermal conductivity, which makes it possible to reduce the depth of their laying in the ground, a very small coefficient of linear thermal expansion.

Nevertheless, they are currently trying to refuse the use of asbestos-cement pipes due to significant shortcomings of these products:

• The material has increased brittleness with accentuated impacts, which often happens during installation.
• These pipes are quite heavy and inconvenient during assembly.
• The process of their conjugation and waterproofing of joints presents a certain complexity.
• Long stay underground entails chemical decomposition of the upper layer, which reduces strength.

In addition, the material is not considered environmentally friendly, and in a number of foreign countries it is generally prohibited for use in residential construction.

PVC pipes

Conventional rigid single-layer PVC pipes have found wide application in the construction of storm drains, akin to those used for sewer systems inside buildings.

Pipes for external sewer networks are available in diameters of 110 or 160 mm, and differ in color - they have an orange tint.

They have all the required strength properties, allowing them to be buried up to 4, and some models even up to 10 meters. All such products are equipped with a standard interface system with reliable rubber seals which allows for easy installation.

They have a smooth inner surface that creates almost ideal conditions for the flow of water.

Pipe manufacturers produce a wide range of fittings and fittings for branched pipelines of any complexity.

The disadvantage of such products is their limited length (up to 3 m) and rigidity - when assembling complex, curved sections of the network, you will need a large number of fittings, which can affect the total cost of the entire sewer system.

Plastic

The most popular for stormwater devices are multilayer plastic pipes.

They can be made from a monopolymer (polypropylene (PP) or PVC) or from several components, for example, the inner smooth layer is low pressure polyethylene (HDPE), and the upper reinforcing layer is PP.

Such pipes have an external corrugated shell, which gives them a special ring rigidity.

At the same time, they do not lose flexibility, which is especially important when laying curved sections of the sewer route. There is no need for numerous fittings, bends and other elements, which significantly reduces the cost of the project.

In addition, pipes with a diameter of 63 and 200 mm are sold both by footage and in coils - this is a simplification construction works, and the ability to purchase exactly the required quantity, minimizing waste.

Installation of pipes, with the appropriate materials and tools, is not excessively difficult.

There are several types of their pairing:

1. Pipes with a socket connection system are produced, while special rubber sealing rings are used.
2. Pipes without a socket are connected to each other or to branch pipes of other elements by welding or couplings.
   • These can be heat-shrinkable, electric-welded couplings, tie-down bands, flexible corrugated bends, tees, crosses or adapters of a certain diameter, devices for butt or flange transition to other types of pipes.

fiberglass

If large diameter pipes are required in the storm sewer system, for example, a common flow collector, it makes sense to use fiberglass products.

Despite their significant size - a diameter of 500 mm and more with a length of 6 or 12 m, they have a relatively low weight.

The material is extremely durable, chemically absolutely neutral, environmentally friendly. The service life of such pipes can be 50 years or more.

Connection of fiberglass pipes to each other and to shaped products is produced by means of special two-cone couplings, on the inner surface of which grooves are machined for the installation of sealing elastomeric rings - one on each side, and one in the center.

Such a connection gives accurate centering and reliable sealing of the joint.

What to consider when installing pipes

The design of the system, in principle, does not require the pipes to be buried deep in the ground. Standard Location- above the pipelines of the general system or section.

The danger of stormwater defrosting is small, but, nevertheless, it is recommended to lay it at a depth below the level of soil freezing characteristic of a particular area.

In the event that this is impossible to do for one reason or another, the pipes are insulated, and the thermal insulation layer is closed plastic wrap to prevent it from getting wet from groundwater.

For the full functioning of the system, the pipes must be laid with a slope in the right direction.

In order for the water to pass freely and carry out constant self-cleaning of the sewer, at least 1 cm (usually up to 2 cm) is set per 1 running meter pipes.

Failure to comply with this rule will inevitably lead to frequent clogging the internal cavity of stormwater pipelines, this is especially true for joints or turns.

Estimated price level for storm sewer pipes

As can be seen from the above rates, optimal solution to create a storm sewer, there will be the use of corrugated multilayer flexible pipes. Using them gives significant savings, 30-50%, compared to other types.

A well-calculated and properly installed sewer piping system will ensure long-term uninterrupted operation of the entire stormwater system as a whole.

- an important component of the communication system of a private house, the presence of which has recently ceased to be considered something superfluous. Properly selected pipes for storm sewers guarantee long term exploitation of this drainage system, no unpleasant effects of rain and eliminate the risk of emergency leaks. Plus, you do not need to frequently clean and repair sewer pipeline equipment.

metal pipes

Steel pipes

To metal pipes sewerage includes pipes made of steel and cast iron. Of course, if the issue of economy is in the first place, then black steel pipes are not equal: they are strong, they are easy to process, they can withstand quite high temperatures and are cheap.

But it must be borne in mind that a large weight and a tendency to corrosion will quickly disable steel pipes. Such pipes are mainly used in enterprises where it is necessary to transport high-temperature petrochemical products through pipes.

Cast iron will cost you much more, but it does not corrode as much as steel. Today, cast iron is used when laying sewers in apartments and even more often for external outlets to the collector and sewer risers.

Cast iron has the same advantages as steel, but also has a number of significant disadvantages:

1. Rough inner surface, which leads to the growth of dirt on the walls of pipes and, as a result, reduces the speed of water flow;
2. An impressive weight that makes construction work difficult;
3. Cast iron pipes are difficult to install as special equipment and skills are required.

Cast iron pipes

Cast iron pipes are convenient to use when laying the outer part of the storm sewer, since cast iron is the most durable material which has an indefinitely long life.

Polymer pipes

Polymeric materials are the most popular in modern construction any sewerage system, including storm water. Moreover, pipes from polymer materials used not only for laying the outer part of the storm sewer, but also underground.

During installation polymer pipes We advise you to take into account the fact that polymer materials change their size and position due to even slight temperature changes. So when installing, you need to leave a little free space, otherwise polymer pipes can break the finish adjacent to them.

In the production of polymer pipes, three types of material are used:

• Polypropylene;
• PVC;
• Polyethylene;
• Unplasticized polyvinyl chloride.

Let's briefly describe each material.

Polypropylene pipes

Storm sewers made of polypropylene pipes are the most durable. If you follow all the rules of operation, then listen to such pipes for at least 70 years. Polypropylene pipes withstand high temperatures, they are unpretentious in installation and they have an increased heat capacity. True, such pipes are somewhat fragile, but this is not important for storm sewers.

Polyvinyl chloride sewer pipes are convenient to use for the underground part of storm sewers, where gravity is important. PVC pipes are durable, they have low interest surface expansion, and they are resistant to ultraviolet radiation. But keep in mind that at low temperatures such pipes lose their elasticity and become very brittle, and at high temperatures they deform.

Aggressive organic matter also have a devastating effect on PVC pipes. A health hazard is the poisonous gas phosgene, which is released during the burning of PVC pipes, so it is strictly forbidden to dispose of them in this way!

We do not recommend using pvc pipes for the construction of the underground part of the sewer, and if they are accepted here, then it is necessary to insulate them. PVC pipes are more beneficial for the outside, for example, for collecting water from the roof of a house.

PVC pipes

Pipe polyethylene for the storm sewerage - best option, as it has an active service life and is easy to install. Polyethylene is much better and more convenient than rigid materials such as steel and cast iron. Polyethylene sewage, one might say, is a new step in the history of the development of pipeline systems. Best to use polyethylene pipes for water drainage. The service life of such pipes on average reaches 50 years, while cast-iron counterparts serve no more than 25 years. Plus, polyethylene is harmless to human health in terms of hygiene and sanitation.

Sewer pipes from pvc material universal in application. They can be used both for the device of underground, and for the ground part of the storm sewer. The disadvantages of unplasticized PVC pipes are, firstly, flammability, and, secondly, a small temperature range. So, the purpose of pipes made of PVC material is the installation of the unearthly part of the storm sewer (rain collectors, for example) and underground (pipes leading to the collector, for example).

A common advantage of all polymer pipes is their non-wetting by water, which makes it possible for the pipes to repel incoming water, preventing it from sticking to the walls. Thanks to this, even after decades, the inner surface of the wall will be smooth and clean.

During the installation of pipes, you will probably encounter the need to cut pipes. When cutting pipes made of polymeric materials, burrs are formed, which must be removed, otherwise they will collect various debris. To make the fit better, always make the edge of the pipes smooth both on the inside and on the outside.

Outcome

So, based on all of the above, it is probably difficult for you to draw a definite conclusion. So let's make it for you:

• When constructing the ground part of the storm sewer, it is better to use pipes made of polypropylene.
• When arranging the underground part - pipes made of polyvinyl chloride, cast iron or unplasticized polyvinyl chloride.