Length of PVC pipes for sewerage. Dimensions of plastic sewer pipes. How to choose the right drain pipe diameter

When installing sewer systems, two types of pipes are used - cast iron and. The size of these products is regulated by the Technical Conditions (TU). The standard size, namely diameter, ranges from 50 to 110 mm.

There are products with larger or smaller diameters. From this article you will learn the main parameters that products made of PVC and cast iron have.

They are produced in accordance with TU 2248-022-23208482-02, which allows you to choose an option for any system.

What types of sewer pipes are there?

Today, sewer systems are made from two types of pipes: plastic and metal. Plastic can be of three varieties, from:

1. PVC - polyvinyl chloride;
2. PP - polypropylene;
3. PET - polyethylene.

Advantages

• Resistant to chemicals such as acids, alkalis, solvents.
• Durability - they can be buried in the ground to a depth of 16 meters.
• Smooth inner surface, which prevents the formation of plaque inside.
• Light weight - the weight of one meter with a diameter of 110 mm will be only 1.5 kilograms.

Metal sewer pipes cannot boast of a large selection of materials; they are produced only from cast iron.

Advantages of cast iron pipes

• Durability - the service life of cast iron products exceeds 60 years.
• Durability - they allow you to install a riser of almost any length.
• Easy installation - the products have a socket, which simplifies installation.

Of course they are very heavy, but this is compensated by their colossal strength.

After familiarizing yourself with the properties of the two types of pipes, you can move on to their sizes.

Plastic pipe sizes

As mentioned above, plastic pipes There are three varieties: PVC, PP, PET. They differ from each other in characteristics, both basic and technical.

And only the sizes remain standard, regardless of the type. Thus, in one system it is possible to use several types from different materials.

PVC pipe size and application

PVC pipes are produced in accordance with GOST R 51613 - 2000 and VSN 48 - 96. Pressure pipelines are regulated by GOST, and non-pressure pipelines are regulated by construction standards (VSN).

In accordance with building regulations, free-flow pipes have three diameter sizes - 50 mm, 90 mm, 110 mm. The wall thickness is 3.2 mm, length 0.5 - 8 m.

Pressure ones differ significantly from their non-pressure counterparts. The number of standard sizes is 13 pieces, and the diameter varies from 63 mm to 315 mm.

However, despite such a large assortment of plastic pipes, not all are in demand. The most commonly used options are:

• Apart from the most popular options 100 and 110 mm, the 75 mm pipe is very popular. They are used as outlets from bathtubs and showers.
• Pipes with a diameter of 100 and 110 mm are used for the construction of risers and installation of external pipelines.
• 200 and 300 mm pipes are used for the installation of industrial sewerage.

PET sewer pipes

Polyethylene pipes are produced in accordance with GOST 22689.2-89 regulations, and have only 4 varieties. The diameter is 40, 50, 90 or 110 millimeters. If the pipe is made of low-density polyethylene, then its wall thickness will be only 3 mm.

PET pipes high pressure are produced in smaller diameters, and the wall thickness is: 3 mm for pipes with a diameter of 40 - 50 mm, and 5 mm for a diameter of 90 - 110 mm. The length can vary from 2 to 9 meters, and this directly depends on the diameter of the product. The larger the diameter, the longer the length of the segment.

Polypropylene pipe

Internal pipes made of propylene are produced in accordance with TU 4926-002-88742502-00. In accordance with these conditions, their diameter can be 50, 100 and 150 mm, and the wall thickness from 3 to 5 mm depending on the diameter. Polypropylene products are used both for risers and for outlet lines from plumbing fixtures.

There are also larger polypropylene analogs that are used for laying external drains. For example, products from the well-known brands Pragma and Korsis can have a diameter from 110 mm to 1.2 meters.

Dimensions of cast iron sewer pipes

Functionality is divided into two types:

1. SMU – there is no detachable connection, i.e. both ends are smooth;
2. SME - equipped with a bell at one end, smooth at the other.

The size is characterized by the internal diameter, for example: the marking DN 100 means that the diameter inside is 100 mm, and outside it will be 110 mm. Standard markings for cast iron pipes are from DN 50 to DN 400. Pipes without sockets, with smooth ends, have increased strength and are produced in lengths of 3 m, while conventional split pipes can be from 15 cm or more.

The wall thickness of cast iron pipes is practically no different from plastic pipes and is 4 - 5 mm. But despite the same dimensions - length, diameter and wall thickness, mass of metal and plastic products differs significantly. For example, 1 meter of cast iron pipe with a diameter of 100 mm weighs 14 kg, and a plastic analogue of the same dimensions will have a mass of no more than 1.5 kg.

In the table below, you can see the recommended diameters of plastic pipes for carrying out or. All data provided are advisory in nature and may change up or down, depending on the technical characteristics of plumbing fixtures or sewer system.

So, today it has become much easier to install a sewer system; the main thing is to purchase pipes and components strictly in accordance with the design parameters.

Video: Dimensions sewer pipes

When installing sewer systems, two types of pipes are used - cast iron and plastic. The size of these products is regulated by the Technical Conditions (TU). The standard size, namely diameter, ranges from 50 to 110 mm.

There are products with larger or smaller diameters. From this article you will learn the main parameters that products made of PVC and cast iron have.

They are produced in accordance with TU 2248-022-23208482-02, which allows you to choose an option for any system.

What types of sewer pipes are there?

Today, sewer systems are made from two types of pipes: plastic and metal. Plastic can be of three varieties, from:

Advantages

• Resistant to chemicals such as acids, alkalis, solvents.
• Durability - they can be buried in the ground to a depth of 16 meters.
• Smooth inner surface, which prevents the formation of plaque inside.
• Light weight - the weight of one meter with a diameter of 110 mm will be only 1.5 kilograms.

Metal sewer pipes cannot boast of a large selection of materials; they are produced only from cast iron.

Advantages of cast iron pipes

• Durability - the service life of cast iron products exceeds 60 years.
• Durability - they allow you to install a riser of almost any length.
• Easy installation - the products have a socket, which simplifies installation.

Of course they are very heavy, but this is compensated by their colossal strength.

After familiarizing yourself with the properties of the two types of pipes, you can move on to their sizes.

Plastic pipe sizes

As mentioned above, plastic pipes come in three varieties: PVC, PP, PET. They differ from each other in characteristics, both basic and technical.

And only the sizes remain standard, regardless of the type. Thus, in one system it is possible to use several types from different materials.

Size and PVC application pipes

PVC pipes are produced in accordance with GOST R 51613 - 2000 and VSN 48 - 96. Pressure pipelines are regulated by GOST, and non-pressure pipelines are regulated by construction standards (VSN).

In accordance with building regulations, free-flow pipes have three diameter sizes - 50 mm, 90 mm, 110 mm. The wall thickness is 3.2 mm, length 0.5 - 8 m.

Pressure ones differ significantly from their non-pressure counterparts. The number of standard sizes is 13 pieces, and the diameter varies from 63 mm to 315 mm.

However, despite such a large assortment of plastic pipes, not all are in demand. The most commonly used options are:

• Apart from the most popular options 100 and 110 mm, the 75 mm pipe is very popular. They are used as outlets from bathtubs and showers.
• Pipes with a diameter of 100 and 110 mm are used for the construction of risers and installation of external pipelines.
• 200 and 300 mm pipes are used for the installation of industrial sewerage.

PET sewer pipes

Polyethylene pipes are produced in accordance with GOST 22689.2-89 regulations, and have only 4 varieties. The diameter is 40, 50, 90 or 110 millimeters. If the pipe is made of low-density polyethylene, then its wall thickness will be only 3 mm.

Pipes made of high-pressure PET are produced in smaller diameters, and the wall thickness is: 3 mm for pipes with a diameter of 40 - 50 mm, and 5 mm for a diameter of 90 - 110 mm. The length can vary from 2 to 9 meters, and this directly depends on the diameter of the product. The larger the diameter, the longer the length of the segment.

Polypropylene pipe

Internal pipes made of propylene are produced in accordance with TU 4926-002-88742502-00. In accordance with these conditions, their diameter can be 50, 100 and 150 mm, and the wall thickness from 3 to 5 mm depending on the diameter. Polypropylene products are used both for risers and for outlet lines from plumbing fixtures.

There are also larger polypropylene analogs that are used for laying external drains. For example, products from the well-known brands Pragma and Korsis can have a diameter from 110 mm to 1.2 meters.

Dimensions of cast iron sewer pipes

Functionality is divided into two types:

1. SMU – there is no detachable connection, i.e. both ends are smooth;
2. SME - equipped with a bell at one end, smooth at the other.

The size is characterized by the internal diameter, for example: the marking DN 100 means that the diameter inside is 100 mm, and outside it will be 110 mm. Standard markings for cast iron pipes are from DN 50 to DN 400. Pipes without sockets, with smooth ends, have increased strength and are produced in lengths of 3 m, while conventional split pipes can be from 15 cm or more.

The wall thickness of cast iron pipes is practically no different from plastic pipes and is 4 - 5 mm. But despite the same dimensions - length, diameter and wall thickness, the mass of metal and plastic products differs significantly. For example, 1 meter of cast iron pipe with a diameter of 100 mm weighs 14 kg, and a plastic analogue of the same dimensions will have a mass of no more than 1.5 kg.

In the table below, you can see the recommended diameters of plastic pipes for internal or external sewerage. All data provided are advisory in nature and may change up or down, depending on the technical characteristics of plumbing fixtures or the sewer system.

Sewer plastic pipes: diameters, prices

Every owner wants everything in his household to work, nothing to break, and to be easy to maintain and install. And sewerage is no exception. It needs to require as little attention as possible - it is very inconvenient if it gets clogged, but it is no less unpleasant to clean it. If you want to have a trouble-free drainage system, pay attention to plastic sewer pipes. They are gradually replacing cast iron ones, and all because they cost less, are easier to install, have a wide range - different diameters and lengths, almost no deposits form on their smooth walls, and even have a service life of about 50 years. This whole bouquet of properties determines their popularity.

Plastic sewer pipes are made from various polymers and their compositions

Types of plastic sewer pipes

Products made from different types polymers:

• polyethylene (PE):
  • high pressure (HPV) - for internal sewerage distribution;
  • low pressure (LDPE) - can be laid outside, in trenches (they have greater strength);
• polyvinyl chloride (PVC);
• polypropylene (PP)

And a number of other thermoplastics and their combinations, but they are rare - people prefer to use already known materials.

The material of plastic sewer pipes is selected depending on the application. For example, polypropylene is more suitable for installing sewerage inside a house or apartment. It has a higher operating temperature range - it normally tolerates environments up to 70°C, and for short periods - up to 95°C. If there are different household appliances, which discharges waste hot water into the sewer, this will not be superfluous. PVC pipes, which have lower prices, are more appropriate when laying external sewers - here the drains are usually already mixed, so the temperatures are lower and PVC can withstand them without harm (working up to +40°C, short-term increase to 60°C).

An example of an in-house sewerage system made from plastic pipes

Sewer pipes can also be smooth or corrugated. Moreover, not only siphon bends can be corrugated. There are profiled pipes for sewerage with an internal smooth wall and an external ribbed one. They have greater strength - they can better withstand compressive loads (they have increased ring rigidity) and can be buried to great depths. Available in diameters from 110 mm to 1200 mm.

Dimensions and diameters

Sewage plastic pipes, unlike water and gas pipes, are produced in the form of lengths of 50 cm, 100 cm, 200 cm, etc. - up to 600 cm. The maximum length is 12 meters, but some manufacturers can make longer sections upon request. When laying long routes, this is convenient - there are fewer connections, fewer possible places for problems to arise (leaks or blockages).

Another important characteristics of plastic pipes are diameter and wall thickness. In the markings they usually go side by side: the numbers are 160 * 4.2. What it means: the outer diameter of the pipe is 160 mm, the wall thickness is 4.2 mm. It’s worth remembering here that manufacturers indicate the outer diameter of plastic pipes, and many calculations and planning require knowing the inner one. It is easy to calculate: from the outer wall we subtract twice the wall thickness: 160 mm - 4.2 mm * 2 = 151.6 mm. Calculations and tables usually show a rounded result - in this case - 150 mm.

Parameters of sewer plastic pipes

In general, the industry produces plastic pipes for sewerage with a diameter of 25 mm. The maximum cross-section depends on the type of pipe (smooth or corrugated) and the material from which it is made. For example, smooth PVC sewer pipes can have a diameter of up to 630 mm, and profiled two-layer pipes can have a diameter of up to 1200 mm. But these dimensions are of no use to homeowners or apartment dwellers. In private housing construction, diameters up to 100-110 mm are mainly used, rarely up to 160 mm. Sometimes, for a large cottage with a large number of plumbing fixtures, a pipe of 200-250 mm in diameter may be needed.

How to choose a diameter for connecting plumbing fixtures

According to the rules, a calculation must be made; it is fully spelled out in SNiP 2.04.01085. This is a complex matter, a lot of data is required, so few people really think as it should. Over the years, accumulated practice has made it possible to derive the average diameters of polyethylene sewer pipes for each of the plumbing fixtures. You can safely use these developments - all calculations usually come down to these dimensions.

Plastic pipes for sewerage: sizes and prices

Diameter and dimensions of PVC sewer pipes

Have you ever wondered what causes the high demand for PVC sewer pipes?

The thing is that they are easy to install, easy to use and, most importantly, inexpensive.

The modern market offers a wide range of materials with which sewerage can be installed.

And in order to do right choice, you need to have at least minimal knowledge about their characteristics.

Purpose of PVC pipes and main characteristics

The scope of application of this material depends on its physical properties. It doesn’t hurt to know that polyvinyl chloride is one of the representatives of the group of thermoplastics, which, after heat treatment and even under mechanical stress, retain their shape and integrity. The pipe production process also uses ethylene, stabilized chlorine and additives to improve properties.

The main purpose of PVC pipes is their use in the sewerage system. Depending on their thickness, the scope of use and, accordingly, the type are determined. It could be:

Plastic pipes: orange - for external sewerage, gray - for internal

This classification applies to those models that have undergone appropriate processing. Non-plasticized polyvinyl chloride PVC-U has the best technical characteristics.

Performance properties directly depend on technical characteristics. As for PVC pipes, they are characterized by the following indicators:

• high level of mechanical strength, moreover, three-layer manufacturing technology and external corrugation allows it to be installed deeply;
• resistance to negative influence aggressive environment;
• a perfectly smooth wall from the inside, which prevents the retention of solid elements;
• high internal pressure, minimum 6 bar, maximum 16;
• the most heat drainage, which is allowed, is +65 degrees Celsius, and the minimum is -10 degrees. There are models that can withstand +90 degrees, but if this happens for a short time;
• specific gravity 2 kg per linear meter(the indicator varies depending on the thickness and diameter);
• the tensile strength is 50 MPa, and the service life is about 50 years.

Features of the diameter and size of sewer pipes

Diameter of sewer PVC pipes

D is the outer diameter of the pipe; Dy is the internal diameter of the pipe; Dр - outer diameter of the socket; Lр - length of the socket; L is the length of the pipe without socket; L1 = L+Lp

Diameter of PVC sewer pipes is the main parameter when choosing them, and this does not depend on whether the sewage system is installed internally or externally. It is worth noting that different pipe sizes mean that they are designed for different tasks. Do not forget that the installation of the sewer system will be easy and correct if you choose the right size.

PVC sewer pipe diameter table

According to the table, a pipe with a diameter of 40 mm at a slope of 1.3 cm should be used to drain the bathtub, then:

• shower - diameter 40 mm, slope 1.48 cm;
• toilet - 100 mm/1.2 cm;
• sink - 40 mm/1.12 cm;
• bidet - 30-40 mm/1.2 cm;
• sink - 30-40 mm/1.36 cm;
• combined drain - 50 mm/1.8 cm;
• central riser - 100 mm;
• bends from the riser - 65-75 mm.

Pipeline parameters include:

• external diameter;
• inner diameter;
• conditional passage - means internal section;
• nominal section.

PVC sewer pipe size chart

The table will help you understand what sizes of PVC sewer pipes there are. You can view it below:

Dimensions of PVC sewer pipes - Table 1

The dimensions of pipes for external sewerage are not regulated in any way; the only recommendation is that its diameter should not be smaller than the circumference of the external main. For example, in private houses pipes with a diameter of 110-250 mm can be used, and in intensive load systems even larger (about 400 mm).

Dimensions of PVC sewer pipes - Table 2

The thickness of the material is also of considerable importance in operation; it depends on the stiffness class to which the pipe belongs. If we talk about the thickness of the walls, then there are no specific standards for the installation of internal sewage systems, but in gravity systems it is not advisable to use pipes thinner than 1.8 mm.

How to choose the optimal diameter of sewer pipes?

Of course, the availability of PVC pipes of different sizes can be considered an advantage, but for those who encounter them for the first time, certain difficulties may arise when choosing. To avoid misunderstandings, it is important to know that:

• the diameter of the horizontal pipe cannot be less than the riser through which they pass wastewater. This may cause blockages;
• horizontal connections are mounted only with the help of oblique tees and angles, this prevents unnecessary clogging;
• It is mandatory to install an inspection at each turn, which is a special hole for cleaning. In multi-storey buildings they are installed every 3 floors. Even if the area is long (more than 12 m) and deaf, an inspection will still not hurt;
• the optimal slope of the sewer pipe is 1.2 cm;
• cutting hollow objects that are not too wide is quite simple using a hacksaw or grinder.

How to choose the diameter? If you will be using a pipe to drain a dishwasher or washing machine, then its circumference should be 25 mm, and if it is a siphon or shower stall, then 32 mm. On average, sewer pipes installed inside an apartment should be 40-50 mm. For the street, hollow objects of round cross-section with a diameter of 160-200 mm are used.

Methods for connecting PVC pipes depending on their diameter

If the pipe circumference does not exceed 63 mm, then the following connection technologies are allowed for their connection:

1. socket welding - the principle is to place a smaller object into one that is larger;
2. sleeve welding - an additional part in the form of a sleeve is used.

This is what the coupling looks like

Some models have threaded connections and require flare fittings.

In the case of pipes larger than 63 mm in diameter, the butt welding method is used. No couplings are needed here, however, the reliability of the connection is in no way inferior to similar methods.

Diameter of PVC sewer pipes: size table

Dimensions of plastic sewer pipes

Nowadays, plastic pipes have replaced the former cast iron and metal sewer pipes. They are gradually replacing old materials for sewerage installation from use, as they have better technical characteristics.

The advantages of plastic sewer pipes include:

• simplicity and speed of installation: they are easy to cut and connect;
• light weight: easy to transport and move, installation can be easily handled by one person;
• impossibility of damage from corrosion and the absence of roughness on the inside of the pipes, on which decomposition products can gradually build up;
• durability: the manufacturer guarantees a fifty-year service life for plastic sewer pipes, and in reality they will last longer.
• cheap: compared to cast iron and metal, plastic pipes cost mere pennies.

The disadvantages of plastic sewer pipes include:

• increased noise compared to cast iron: this is felt in panel apartment buildings with high sound permeability;
• sensitivity to high temperatures: when the temperature inside the pipe is above ninety degrees, the pipe gradually softens and deforms. But in the sewer system, as a rule, such high temperatures are not created for a long time.

Standards and range

The parameters and dimensions of plastic sewer pipes depend on their area of ​​application - whether it is an internal pipe or an external one. The outer ones have greater wall thickness, and, consequently, strength. Plastic pipes differ in the material from which they are made:

1. Pipes made of polypropylene (PP), the most common option, are produced in accordance with GOST 26996-86, which determines the composition of PP and copolymers. GOST does not establish a specific standard for them “plastic sewer pipes sizes”. But in a market economy standard sizes PP pipes developed independently: the following diameters of sewer plastic pipes are available for sale: 32, 40, 50 and 110 mm; length options: 150, 250, 500, 750, 1000, 2000 and 3000 mm.
2. Pipes made of high-density polyethylene (HDP) are produced in accordance with GOST 22689.2-89. Since they are produced wound into coils and cut into pieces of any required length, GOST sets only their diameters: 40.50, 90 and 110 mm. PVP pipes are divided into pressure and non-pressure. For pressure pipes, GOST 18599-83 prescribes the diameter of sewer plastic pipes from 10 to 1200 mm.
3. Polyvinyl chloride (PVC) pipes. The dimensions of this type of plastic sewer pipe are established by GOST 51613-2000. According to his instructions, PVC pipes should be from 10 to 315 mm in diameter, with a length of 4 to 12 m.

Dimensions of plastic sewer pipes: diameters, lengths, manufacturers

Sewer plastic pipes: dimensions, characteristics, installation features

Plastic sewer pipes in many areas of human activity have today almost completely replaced traditional metal pipes. The first is based on:

The most popular for arranging modern sewer systems are PVC pipes, because they are resistant to aggressive substances found in household and industrial wastewater. Those elements that are in the ground can also have a negative impact.

Why use plastic

If we are talking about high-quality plastic pipes for laying sewers, then they have a perfectly smooth surface, so clogging occurs extremely rarely during operation. During installation, there is no need to use any special tool; a hacksaw for metal will be sufficient for cutting, and its small teeth practically do not form burrs.

Key Features

Sewer plastic pipes are made from complex polymer compounds that are obtained during use latest technologies. This guarantees durability and reliability. If you want to choose especially durable products, then you should prefer metal-polymer sewer pipes.

Plastic pipes are quite easy to install; their installation requires less labor, this applies not only to the inside of the house. Such products have excellent throughput and are easy to bend at a certain angle. You can lay the pipes yourself. They have many advantages, including:

• reasonable cost;
• no need for cathodic protection;
• low thermal conductivity;
• reliable protection against the spread of viruses and bacteria;
• durability;
• resistance to chemical influences, corrosion and external aggressive environment;
• light weight.

Sewage plastic pipes are ready to last more than 50 years. They do not require constant maintenance.

Size information

The products described may have a variety of sizes. If we are talking about an impressive diameter, then it is designed for increased load, so such pipes are installed to service buildings of social facilities, cottages and apartment buildings. For example, a diameter of 200 mm is suitable for a hospital, hotel or sauna.

If the diameter is increased to 300 mm, then such a pipe will be suitable for the operation of industrial facilities. IN individual construction small diameter products are required. A 150 mm riser will not be fully used, even if there are several bathrooms in the house. Square pipes can be used to solve problems of irrigation of household plots. To organize drains from individual appliances such as washbasins, showers and baths, you can use 75 mm pipes.

To ensure the toilet works, it is necessary to use a 100 or 110 mm pipe. When choosing sizes, it is also important to take into account the wall thickness, which will depend on the diameter of the pipe. If the cross-section is 160 mm, then the wall thickness will be 3.9 mm. In this case, a parameter of 110 mm will indicate that the wall thickness is 3 mm.

The weight of the pipe also depends on the diameter. For example, a 160 mm pipe weighs 2 kg, while a 110 mm pipe will weigh 1 kg. Sewage plastic pipes also have a certain length. According to state standards, manufacturers produce separate sections from 1 to 6 m, the step will be 1 m.

Specifications

Plastic sewer pipe, the characteristics of which you should know before purchasing of this product, has high mechanical strength. This is due to three-layer manufacturing technology and external corrugation. That is why these elements can be installed to a depth of up to 8 m. The pipes are resistant to aggressive environments. This especially applies to PVC-U materials, because they are used for transporting gases and chemical liquids.

The internal pressure will depend on the wall thickness and design, maximum value can reach 16 bar, while the minimum is 6 bar. The main disadvantage of these pipes is temperature limitation. The maximum temperature is 65 °C, while the minimum is -10 °C.

Some models allow short-term exposure to temperatures up to +90 °C. Specific gravity may vary depending on the wall thickness and diameter, but on average it is 2 kg per linear meter. At rupture, the maximum tensile strength is 50 MPa.

Characteristics of plastic sewer pipes for indoor installation

The sizes of plastic sewer pipes have been mentioned above. But this parameter cannot be called the only one that you should be interested in when purchasing these products. For example, it is also important to pay attention to the color, which indicates the purpose.

A gray tint indicates that there is a pipe in front of you. internal sewerage. It has smooth walls and is connected by a socket. The most popular sizes are: 32, 40, 50 and 110 mm. The length can vary from 315 to 3000 mm. Taking into account the rigidity conditions, the wall thickness should be selected. However, for gravity systems this parameter cannot be less than 1.8 mm.

Characteristics of pipes for external sewerage

External plastic sewer pipes are usually yellow or orange colors. They are used for outdoor installation and are used under more severe conditions. This determines that they have their own list of wall thicknesses for each diameter. For example, for a 200 mm diameter the wall thickness will be 3.9 mm. This applies to pipes for light conditions; they are laid to a depth of up to 4 meters.

With the above diameter, the wall thickness will be 4.9 mm if the pipes are operated under average conditions of rigidity and are buried 6 meters. The wall thickness will be increased to 5.9 mm if the burial depth reaches 8 meters and the rigidity conditions are severe.

Cost of sewer plastic pipes

A plastic sewer pipe 50 mm is a product where the diameter is indicated. You will have to pay 94 rubles for the product. In this case, the wall thickness will be 3.2 mm. In this case, we are talking about hardness class SN 4. A plastic sewer pipe 110 mm will cost the consumer 200 rubles. The wall thickness remains the same. With an increase in diameter to 160 mm, the price increases to 579 rubles.

Connection Features

Plastic sewer pipes must be securely sealed and connected to each other. Ultimately, the master must obtain a complete design. For this, universal fittings are used, including:

A tee Y-fitting is used for connection at an angle of 45°C. If it is necessary to form a right angle, a T-Y fitting should be used. If you need to connect a pipe of a larger diameter with a thinner pipe, then a sleeve is put on the socket, which allows you to reduce the diameter.

To avoid blockages, experts recommend using any connections less frequently. Before connecting sewer plastic pipes, the structures should be cleaned; this is necessary when the pipe will be soldered to the socket. If uneven surfaces form on the inner wall, they will collect solids from the drain. When connecting with force, you can use a lubricant such as soap, glycerin or grease.

Carrying out installation

The dimensions of the plastic sewer pipes must be selected before you begin laying the system. Next you need to follow technology. At the first stage, the elements are adjusted, and the master needs to check the correspondence of the slopes and angles. You can make markings so as not to get confused in a large number of nodes.

At the next stage, the elements are connected to each other. It is important to check that the product fits into the socket one third of the seat. You don't have to make any special efforts to do this. To ensure tightness, the connections are glued together with a special compound. After applying it, you can put on the fitting. To create a branched system, you can use tees or other distribution elements. After completing the work, it is important to check the tightness of the system within an hour. If no leak is found, then installation work were carried out successfully and efficiently.

Features of arranging a sewerage system using plastic pipes

Plastic sewer pipes, the prices for which were mentioned above, must be laid with a certain slope, which will ensure unhindered discharge of waste and wastewater.

If the slope is too great, then build-up will form on the inner walls, which over time will lead to the formation of blockages and traffic jams. If the slope is made smaller or not provided at all, then the wastewater will not leave the house on its own, and the system in this case will be inoperative. Plastic sewer pipes, the prices of which should interest you if you plan to use them when arranging the system, are used in conjunction with metal fan pipe. It is required for ventilation and is installed at a height of four meters. Its diameter usually varies from 50 to 110 mm.

When it comes to urban multi-storey buildings, where a sewer riser passes through all floors, its diameter must coincide with the outlet pipe from the toilet. This value is 110 mm. In this case, the pipe is routed to the roof, it is left open. It will communicate with the atmosphere and eliminate vacuum, which could lead to the appearance of unpleasant odors.

When assembling the riser, it is important to strengthen the neck of each pipe with a clamp. If a compensating pipe is installed, its fastening is carried out using the same technology. You should not assume that O-rings will suffice for plastic pipes. Over time, they will certainly become loose, and the joints may lose their tightness.

Conclusion

Installation of plastic sewer pipes is quite often carried out under highways. In this case, the system should be located at a depth of one meter or more. If it is no longer possible to deepen the system, then it must be pulled through a reinforced concrete box.

It is important not only to correctly lay the sewage system made of plastic pipes, but also to ensure operation in accordance with the rules. To clean sewer risers, steel wire is used, which is not suitable for plastic structures. This is due to the fact that the wire can scratch the inner walls of the products. Therefore, it is recommended to use a soft cable that is protected by a rubber tip.

Sewer plastic pipes: dimensions, characteristics, installation features

Have you ever wondered what causes the high demand for PVC sewer pipes?

The thing is that they are easy to install, easy to use and, most importantly, inexpensive.

The modern market offers a wide range of materials with which sewerage can be installed.

And in order to make the right choice, you need to have at least minimal knowledge about their characteristics.

Purpose of PVC pipes and main characteristics

The scope of application of this material depends on its physical properties. It doesn’t hurt to know that polyvinyl chloride is one of the representatives of the group of thermoplastics, which, after heat treatment and even under mechanical stress, retain their shape and integrity. The pipe production process also uses ethylene, stabilized chlorine and additives to improve properties.

The main purpose of PVC pipes is their use in the sewerage system. Depending on their thickness, the scope of use and, accordingly, the type are determined. It could be:

• internal sewerage:
• external;
• pressure system;
• gravity drain.

Plastic pipes: orange - for external sewerage, gray - for internal

This classification applies to those models that have undergone appropriate processing. Non-plasticized polyvinyl chloride PVC-U has the best technical characteristics.

Performance properties directly depend on technical characteristics. As for PVC pipes, they are characterized by the following indicators:

• high level of mechanical strength, moreover, three-layer manufacturing technology and external corrugation allows it to be installed deeply;
• resistance to the negative influence of an aggressive environment;
• a perfectly smooth wall from the inside, which prevents the retention of solid elements;
• high internal pressure, minimum 6 bar, maximum 16;
• the highest temperature of wastewater that is allowed is +65 degrees Celsius, and the minimum is -10 degrees. There are models that can withstand +90 degrees, but if this happens for a short time;
• specific gravity 2 kg per linear meter (the figure varies depending on the thickness and diameter);
• the tensile strength is 50 MPa, and the service life is about 50 years.

Features of the diameter and size of sewer pipes

Diameter of PVC sewer pipes

D is the outer diameter of the pipe; Dy is the internal diameter of the pipe; Dр - outer diameter of the socket; Lр—socket length; L is the length of the pipe without socket; L1 = L+Lp

Diameter of PVC sewer pipes is the main parameter when choosing them, and this does not depend on whether the sewage system is installed internally or externally. It is worth noting that different pipe sizes mean that they are designed for different tasks. Do not forget that the installation of the sewer system will be easy and correct if you choose the right size.

According to the table, a pipe with a diameter of 40 mm at a slope of 1.3 cm should be used to drain the bathtub, then:

• shower - diameter 40 mm, slope 1.48 cm;
• toilet - 100 mm/1.2 cm;
• sink - 40 mm/1.12 cm;
• bidet - 30-40 mm/1.2 cm;
• sink - 30-40 mm/1.36 cm;
• combined drain - 50 mm/1.8 cm;
• central riser - 100 mm;
• bends from the riser - 65-75 mm.

Pipeline parameters include:

• external diameter;
• inner diameter;
• conditional passage - means internal section;
• nominal section.

PVC sewer pipe size chart

The table will help you understand what sizes of PVC sewer pipes there are. You can view it below:

Dimensions of PVC sewer pipes - Table 1

The dimensions of pipes for external sewerage are not regulated in any way; the only recommendation is that its diameter should not be smaller than the circumference of the external main. For example, in private houses pipes with a diameter of 110-250 mm can be used, and in intensive load systems even larger (about 400 mm).

Dimensions of PVC sewer pipes - Table 2

The thickness of the material is also of considerable importance in operation; it depends on the stiffness class to which the pipe belongs. If we talk about the thickness of the walls, then there are no specific standards for the installation of internal sewage systems, but in gravity systems it is not advisable to use pipes thinner than 1.8 mm.

How to choose the optimal diameter of sewer pipes?

Of course, the availability of PVC pipes of different sizes can be considered an advantage, but for those who encounter them for the first time, certain difficulties may arise when choosing. To avoid misunderstandings, it is important to know that:

• the diameter of the horizontal pipe cannot be less than the riser through which the wastewater passes. This may cause blockages;
• horizontal connections are mounted only with the help of oblique tees and angles, this prevents unnecessary clogging;
• It is mandatory to install an inspection at each turn, which is a special hole for cleaning. In multi-storey buildings they are installed every 3 floors. Even if the area is long (more than 12 m) and deaf, an inspection will still not hurt;
• the optimal slope of the sewer pipe is 1.2 cm;
• cutting hollow objects that are not too wide is quite simple using a hacksaw or grinder.

How to choose the diameter? If you use a pipe to drain a dishwasher or washing machine, then its circumference should be 25 mm, and if it is a siphon or shower cabin, then 32 mm. On average, sewer pipes installed inside an apartment should be 40-50 mm. For the street, hollow objects of round cross-section with a diameter of 160-200 mm are used.

Methods for connecting PVC pipes depending on their diameter

If the pipe circumference does not exceed 63 mm, then the following connection technologies are allowed for their connection:

1. socket welding - the principle is to place a smaller object into one that is larger;
2. sleeve welding - an additional part in the form of a sleeve is used.

Some models have threaded connections and require flare fittings.

In the case of pipes larger than 63 mm in diameter, the butt welding method is used. No couplings are needed here, however, the reliability of the connection is in no way inferior to similar methods.

Sewer pipes, like any equipment, require replacement over time. Now old cast iron pipes are increasingly being replaced with modern PVC (polyvinyl chloride) products, which has many advantages over metal.

Polyvinyl chloride is modern material, which has proven itself well in the pipe and fittings market.

Typically, PVC pipes are used for laying sewers (both internal and external), in pressure systems and wells, drainage structures and gravity drainage.

PVC products differ:

• anti-corrosion properties;
• immunity to damage by microorganisms;
• smoothness of the inner surface, which prevents sedimentation and sediment build-up;
• dielectric properties (polyvinyl chloride does not conduct electricity);
• environmental safety, absence of harmful emissions;
• inertness (PVC pipes do not come into chemical contact with the transported medium);
• resistance to temperature changes;
• resistance to barometric loads;
• long service life;
• ease of installation;
• light weight of products;
• large assortment of pipes various purposes and shaped products;
• attractive cost, which is significantly lower than the price of metal ones.

In most cases, PVC pipes running indoors do not require insulation. If such a need arises (for example, during the installation of underground communications or installation in the open air), it is rational to additionally insulate and insulate the pipeline.

Types of PVC sewer pipes and adapters

Depending on which section of the highway the product will be used, there are:

1. Lightweight pipes SN-2 are used in areas with the least load: when laying domestic sewerage indoors, as well as in residential areas where there is no traffic load.
2. Denser SN-4 pipes are used for laying sewers under roads with moderate traffic.
3. Industrial pipes SN-8 are intended for use in neighborhood and city sewerage mains, in production, as well as in areas with intense traffic load.

The use of polymer pipes to create sewerage systems is due to several factors. They are easy to install, have good performance properties, and are inexpensive.

A large selection of manufacturers and types of these pipes implies at least minimal knowledge of their characteristics. PVC is one of the most popular types of material for sewer pipes.

The scope of application of PVC pipes is determined by their physical properties. First you need to know the nature of the origin of this material.

Polyvinyl chloride (PVC) belongs to a group of thermoplastics that, after heat treatment, retain their shape even under mechanical stress.

Polyvinyl chloride contains ethylene and stabilized chlorine. Additional additives are also used for production to improve mechanical and thermal properties.

Pipes made of this material are intended for the implementation of sewerage systems.

They are divided into the following types:

• for internal sewerage;

• for external sewerage;

• for pressure systems;

• for gravity drainage of wastewater.

This classification can be applied to those pipe models whose production material has been processed accordingly.

Currently, there are 2 types of PVC pipes:

• PVC polyvinyl chloride (PVC);
• unplasticized polyvinyl chloride PVC-U (PVC-U).

In most cases, PVC-U pipes are used, as they have the best technical characteristics and can be used for pressure sewer systems.

Specifications

The performance properties of PVC pipes are determined according to their technical characteristics.

There are several fundamental parameters that are unique to this material:

• high mechanical strength. When using 3-layer manufacturing technology and external corrugation, PVC pipes can be installed in external sewerage systems at a depth of up to 8 m;
• resistance to aggressive environments. This applies to a greater extent to PVC-U, since it is this material that is used for transporting chemical liquids and gases;
• the smooth internal surface ensures the free passage of solid elements included in fecal water;
• The maximum internal pressure values ​​depend on the wall thickness and pipe design. They can withstand from 6 to 16 bar;
• Temperature restrictions are the main drawback of these pipes. The maximum ambient temperature is +65°C and the minimum -10°C. In some models, short-term exposure to +90°C is allowed;
• specific gravity is about 2 kg/m.p., but can vary depending on the diameter and wall thickness;
• maximum tensile strength – 50 MPa;
• service life – up to 50 years.

These parameters may vary depending on the quality of production and type of pipe construction.

Pipe sizes

When choosing pipes for laying a sewer line, you should pay attention to their structure and dimensions. The latter will directly affect the sewerage parameters - throughput and mechanical strength.

Also, the length of the pipes can significantly affect the cost of the entire sewer system - minimizing waste when using optimal sizes length.

Pipe diameters

An important characteristic of PVC pipes is their diameter. will be correct if the diameters are selected according to the technical characteristics of the system.

When choosing, you should take into account a certain classification of this indicator.

Inner diameter

It is fundamental when calculating bandwidth pipeline. It is measured taking into account the maximum distance between the inner plane of the pipe.

The outer diameter depends on the wall thickness and its size is necessary for choosing mounting and insulating materials. When designating pipes, only the outer diameter is indicated.

The maximum and minimum diameter sizes depend on the type of sewer system - external or internal.

The dimensions of the pipes, depending on the type of plumbing fixture connected, are shown in the table:

As for external sewerage, the size is not regulated. But there are clear recommendations that the diameter of the outlet pipe from the house should not be less than the external main.

For private houses, it is possible to install pipes with a diameter from 110 mm to 250 mm. In systems with heavy loads, structures up to 400 mm can be used.

Wall thickness

The thickness of the pipe walls varies depending on their stiffness class. This parameter is necessary to determine the degree of protection from external mechanical influence.

For internal sewerage, the thickness is not standardized, but for gravity systems it should not be less than 1.8 mm.

Pipes for external installation have more severe operating conditions and therefore there is a strict correspondence between diameter and wall thickness;

• SN2 light – wall size starts from 2.2 mm (diameter 50 mm) and up to 5.9 mm. The burial depth for these pipes is no more than 4 m;
• SN4 medium – the wall can be from 3 to 7.7 mm. Installation depth – up to 6 m;
• SN8 is heavy - thickness starts from 3.2 to 9.2. Maximum installation depth is 8 m.

Important! It is worth noting that the choice of pipes for external sewerage should be based precisely on the wall thickness, and not on the outer diameter. Even for the light class you can find a pipe with a diameter of 500 mm, but with a very thin wall (3.2 m).

Difference from other polymer pipes

Polyvinyl chloride is not the only polymer material, used to make sewer pipes.

In addition to it, the following compositions are also used:

Polyethylene PE

This material differs from the usual transparent film. For the production of pipes, so-called cross-linked polyethylene is used. It has increased resistance to UV radiation and can withstand heavy loads.

Distinctive indicators:

• the upper threshold of liquid temperature has been increased to 95°C;
• installation is possible only by soldering;
• pipes can be used for both sewerage and water supply. Including hot water supply.

Polypropylene PP

A popular material for the production of external sewerage pipes. Its properties are almost completely similar to polyethylene, but it is more rigid.

Differences from PVC:

• labor-intensive to process. To cut a certain length, special equipment is required;
• connection to each other only by soldering. For some types of operation, an adhesive coupling connection is permitted.

The table shows the main physical indicators of polymer pipes made of various materials:

Advantages

PVC pipes have a number of advantages, which determine their popularity as the main material for laying sewers:

• relatively low cost. Due to low production costs, their price is currently the most affordable compared to pipes made from other materials;
• ease of installation. The connection occurs using a socket method, which does not require the use of special equipment. Due to this factor, the dismantling procedure is simplified;
• large selection of connecting and branching elements. This simplifies the design of pipelines with complex configurations;
• corrosion resistance. This factor is a consequence of 2 physical properties of PVC pipes - a smooth internal surface and resistance to aggressive environments;
• lack of electrical conductivity. PVC is a dielectric, so there is no need to install grounding.

Classification

PVC pipes are classified according to several criteria - maximum load and performance indicators.

Hardness index:

• N – ring stiffness can reach up to 4 kN/m²;
• S – the same parameter has a maximum value of 8 kN/m².

According to operational characteristics, the following gradation has been developed, which they possess:

• SN-2, SDR51 series S25 - their structure is not designed for external influences. Can be used for external installation with a very low pressure coefficient on the surface;
• SN-4, SDR41 series S20 – can be installed under roads with low traffic and with vehicle weight restrictions;
• SN-8, SDR34 series S16.7 - the toughest class of PVC pipes. Able to withstand high and long-term pressure on the surface. They are used for laying highways with large internal and external loads.

Internal pipes

When designing internal sewerage, in most cases special gray PVC pipes are used.

In terms of hardness they belong to the light class and cannot be used for outdoor work.

All pipes of this type have the following characteristics:

• smooth-walled;
• type of connection - socket;
• the most popular diameters are 32, 40, 50 and 110 mm;
• The pipe length can be from 315 to 3000 mm.

Due to their good rigidity, these pipes are ideal as risers for private houses. For the installation of complex sewerage systems, special elbows, tees and adapters are used.

External pipes

For external sewerage, it is necessary to use special PVC pipes. They must correspond to their stiffness class and have the required wall thickness.

Depending on the type of structure, they can be:

• smooth-walled or single-layer. Outwardly, they are similar to pipes for internal sewerage, but differ in geometric parameters and color (orange, yellow);

The table shows the main geometric and specifications smooth-walled pipes.

• corrugated or three-layer. Manufactured by extrusion. Moreover, PVC-U corrugation, which has good mechanical strength, is used as a protective layer. The inner soft PVC layer ensures low friction during the passage of wastewater.

For external sewerage, the above pipes with a diameter of 110 to 630 mm are used.

Pressure

PVC pressure pipes are used in sewerage systems with forced removal of wastewater using pumping equipment.

Due to the relatively high pressure on the internal walls, special requirements are imposed on them in terms of thickness and the method of their connection.

Currently, three types of pressure pipes are produced, which are characterized by different maximum internal pressure indicators - 0.6, 1 and 1.25 MPa.

In addition, they are divided according to the method of connecting to each other:

• glue method. The connection occurs using special fittings and glue. When cutting, it is necessary to remove the chamfer. Process the edges, apply a layer of glue and secure the connection using clamps;
• trumpet. Installation occurs by installing the socket end into a straight section of pipe. They are pre-treated with silicone grease.

Important! When installing pressure sewer systems, attention should be paid to the tightness and strength of the connecting elements.

Gravity

Gravity pipes are used for installing a gravity sewer system, i.e. in this case, the wastewater is removed under the influence of gravity.

For such sewerage, you can use standard pipes with a socket connection. But it is important to take into account the possible external load (external sewerage) and the angle of inclination of the pipeline.

Prices

The cost directly depends on the manufacturer, the diameter of the pipes, the method of their manufacture and application - for external or internal sewerage. Table 4 shows the estimated prices for the main types of PVC pipes.

The optimal choice for a sewer system should take into account the manufacturer’s reputation and system parameters, which will determine the required characteristics of the pipelines.

Video: installing PVC pipes on a sewer using Griffon glue