To install new and replace old sewers, polyvinyl chloride pipes are widely used, which successfully compete with similar products from other materials. Sizes of PVC pipes for sewage are available, standard and special on request. By appointment, they are divided into internal, with a diameter of 25 to 110 mm, and external - from 110 to 650 mm or more. Products for external sewerage systems are made in orange, and for internal - gray, because they differ noticeably in their technical characteristics.
Often they choose PVC pipes for sewage, because they are profitable to purchase. These lightweight and durable products have a long service life and are relatively inexpensive. And also they are easy to mount without resorting to special expensive equipment. It is only important to select the appropriate pipe diameter and plan the optimal sewerage system installation scheme.
Characteristics of PVC pipes
PVC sewer pipes made of the thermoplastic of the same name have:
- light weight;
- minimum thermal conductivity;
- lack of corrosive processes and chemical oxidation;
- durability (up to 50 years);
- preservation of shape after heat exposure;
- dielectric properties, which excludes the passage of current and the need to ground drains;
- thermal endurance from -25 to +65.
Due to the inner smooth surface, silting and accumulation of dirt on the walls is prevented, there is no damage from the effects of solid particles moving along the drain. This is especially important for gravity (no pressure) systems. Polyvinylchloride thermoplastic, on the basis of which PVC sewer pipes are made, after high temperature treatment and extrusion procedure, acquires improved properties - it retains its shape well. Polyvinyl chloride contains ethylene and stabilized chlorine. To improve the quality of the material, various additives are added, and a high-strength joint is obtained under high pressure.
Structural diameters
All PVC sewer pipes are classified according to purpose, diameter and length. The variety of their sizes is explained by the fact that many objects where sewerage systems are installed differ in the amount and intensity of effluents, and each of the water supply branches is designed for certain tasks and loads. The diameter of the pipe affects its throughput, therefore it has an important characteristic.
Internal sewerage system
Sewer pipes for an internal drainage system have an easy stiffness classification and are therefore not suitable for outdoor installation. These gray products with smooth inner walls are produced in lengths from 25 cm to 3 m. They are interconnected "in a bell".
The most demanded pipes with a diameter of 50–75 mm, with sufficient throughput. But for the riser, a large diameter is needed, and the branch connected to it must have an internal section not less than that of the vertical pipe itself, but not more, in order to avoid blockages.
There are established standards based on calculations according to SNiP (building codes and regulations) for the selection of pipe diameters depending on the volume of fluid flushed out per unit of time. For internal sewerage, the following parameters are recommended:
- Ø 25 mm - for dishwashers, washing equipment;
- Ø 30–47 mm - for sinks, bidets;
- Ø 38–50 mm - for kitchen sinks, showers, bathrooms;
- Ø 50 mm - for wiring the internal network, joint drain;
- Ø 70–86 mm - for riser bends;
- Ø 100–110 mm - for the central riser and connecting a toilet bowl to it.
Outdoor sewerage system
These products are more impressive in size and are more durable. Available in orange. Diameters are 110–630 mm, and there are more. The most popular length is from 0.5 to 2 m, there are products up to 6 m. According to the classification of ring stiffness, there are three types. 
Light (L) - fit in places where there is only pedestrian traffic, because they cannot withstand heavy loads, the depth of the laying is 80-200 cm.
Medium (N) - permissible for light soils and where only passenger cars pass through, the depth of laying is 2–6 m.
Rigid (S) - have reinforced walls and can withstand any loads, are laid in places with heavy traffic and on the territories of large industrial enterprises, the depth of pipe laying is up to 8 m.
PVC pipes for outdoor sewerage are subject to ground pressure drops, chemical influences of the environment, and heavy loads. Therefore, materials for them are used with increased stability, providing them with a long service life (up to 50 years).
These pipes can be two or three layers. The outer layer is made of non-plasticized PVC. In three-layer products, the inner layers are made of porous foam. Outer pipes are connected using the hot technology to form a monolithic structure. The dimensions of the pipes in diameters are not clearly standardized, but it is recommended that they correspond to the indicators of the external line.
Typical dimensions of external PVC sewer pipes:
- Ø 110 mm - the minimum used size, used in summer cottages;
- Ø 150–190 mm - for draining wastewater to treatment systems;
- Ø 300 mm - designed for the sewerage system of several houses, pool drains, etc.;
- Ø 630 mm - used for highways serving small villages;
- Ø 1100 mm - for city sewage mains.
Selection of the diameter of PVC pipes for sewage
For the selection of pipes, the decisive parameters are length, diameter, wall thickness. In pipe markings, two numbers are often adjacent. For example, 160 x 4.2, where the first is the outer diameter and the second is the wall thickness. But in planning for calculations, it is important to know the inner diameter in order to determine the throughput of the PVC pipe. It can be calculated by subtracting the double wall thickness from the outer diameter: 160 mm - 4.2 × 2 \u003d 151.6 mm. For calculations, the figure is rounded to 150.
To select the diameter of the pipe, calculations are made according to SNiP 2.04.01-85. But they require a lot of data, and the calculations themselves are complex. Therefore, many people use ready-made tables with averages that have long been tested in practice.
Preparatory stage for installing pipes
First of all, it is necessary to draw up a diagram of the future communication system, carry out calculations of consumables, calculate the number and size of fittings, parts required for work. In addition to straight pipes, many more connecting elements are produced for easy installation of the sewage system. They come in a variety of sizes and designs.
Their main types:
- crosses and tees for creating pipe routing;
- couplings and expansion joints, which are needed for repairs;
- reducers for connecting pipes with different diameters;
- rotary bends;
- plastic hatches for inspection and cleaning from blockages.
When drawing up a plan, it is necessary to provide a smooth transition in those places where turns are necessary - instead of one rectangular connection, put two fittings of 45 degrees. This will avoid blockages.
When purchasing pipes and additional parts, it is necessary to calculate the consumption of materials with a margin, approximately 15% more, so that later there will be no downtime. With proper preparation, installation work can be carried out in a private house in a few days, and in an apartment in a few hours.
The main stages of installation
When everything is purchased, you need to prepare PVC pipes for laying. They are cut with special tools, but you can also use a hacksaw for metal. It is better to immediately mark the place of the cut around the circumference and cut strictly at right angles so that the connection is tight. The edges must be carefully cleaned with sandpaper. The connecting pieces can be cut during assembly.
Any drainage system is located at an angle, the angle of which is calculated even when drawing up a plan. Each functional area may have its own calculations, but on average 4-7 cm are made for each meter. To prevent the pipes from sagging, they must be fixed to the wall after 1 meter.
Prepared pipes and fittings are assembled into the structure using sealed rubber bands, inserted tightly until they stop. The joints must be absolutely clean, it is recommended to lubricate them for greater strength with various sealants, glycerin greases, soap solutions.
After the work, the sewage system is tested for leaks. To do this, all the plumbing is turned on at the same time, and another bucket of water is poured into the sink and bathtub. If leaks are detected, problem areas are more firmly fixed and additionally treated with sealants or construction glue. Then the test is repeated.
Pipes made of plastics such as polyethylene, polyvinyl chloride (PVC), polypropylene (PP) are an alternative replacement for pipelines made of metals or concrete, that is, they are intended for laying main water pipelines, sewerage and drainage systems. In addition, they can perform the functions of protective boxes when laying cable lines for various purposes (fiber-optic, telephone, etc.).
Plastic pipes. Advantages and disadvantages
The main advantages of using plastic pipes in comparison with metal and concrete (ceramic) pipes:
- Smooth and smooth inner surface of the pipe, which significantly reduces the coefficient of friction, thereby increasing their conductivity;
- Resistance to corrosive destruction;
- Resistance to aggressive environments of a chemical or biological nature;
- Longer service life without special maintenance measures. Up to 50 years - plastics and up to 20-25 years of operation - pipes made of other materials;
- Environmental Safety;
- Low specific gravity;
- Low cost;
- Simplicity and ease of installation work without the need to involve special equipment and equipment (installation is carried out using a special thermal soldering iron and mechanical scissors).
The main focus of our article will be on the so-called red pipes - PVC pipes intended for the construction of sewers, with a diameter of 110 millimeters. Separately, we note that all plastic products undergo mandatory state standardization and have the appropriate certificates depending on the direction of their application.
Sewer pipe
Pipes for laying sewer drains have different colors (gray, black, various shades of both of these), but a red plastic sewer pipe 110 (160, 200, 250) mm is especially popular when carrying out household (private) communications. This is because these products are able to withstand low temperatures and high ground pressure when laid underground.
Technical description of a sewer pipe with a diameter of 110 mm
The technical characteristics of a 110 mm sewer plastic pipe have the following main definitions in accordance with GOST:
- The size of the outer diameter of the pipe;
- Nominal wall thickness;
- Minimum pressure to be maintained in bar for different diameters and wall thicknesses.
Sizes of 110 mm pipe for sewage according to materials of manufacture and GOST
The common dimension for all plastic sewer pipes is their length. It has the following gradations: a 110 mm sewer plastic pipe with a length of 50, 100, 200 and so on up to 600 centimeters.
The maximum possible length for this type of product is 12 meters.
The diameter and wall thickness of the pipe are indicated by the manufacturer in the marking on the outer surface of the pipe and depends on the material used for its manufacture. The weight of the product depends on these parameters, taking into account the length. The size of the diameter of plastic sewer pipes starts from 25 millimeters and, depending on the material and type of pipe (smooth, corrugated), can reach:
- for smooth pipes - 630 millimeters;
- for profiled (two-layer) - 1200 mm.
The most popular in private construction of sewage systems are pipes with a diameter of 110-160 mm.
Calculation of the buoyancy of plastic pipes for sewage systems (110 mm)
This is not the first time we have come across absurd questions from our users. And today the question becomes the leader: "How to calculate the buoyancy of 110 mm plastic pipes?"
The question looks absurd for the reason that the calculation of buoyancy is carried out for pipes intended for the construction of various water structures from them, such as pontoon crossings, landing stages, floating breakwaters and the like. At the same time, the minimum used pipe diameter starts from 300 millimeters, depending on the purpose of the construction object. Moreover, there is no need to carry out this calculation for a 110 mm sewer plastic pipe due to its size and technical structure. Simply put, a flared expansion at one of its ends.
Possible (and applied) calculations of sewer pipes relate to their throughput of conducted fluids and the determination of the laying angle when laying free-flow sewer lines. In such cases, it is taken into account:
- Length of the pipeline section;
- Inner and outer diameter of the product;
- The thickness of its pressure walls;
- Conditions for the passage of waste fluids (fecal matter).
For calculations of this type, there are special hydraulic and mechanical tables based on GOST standards.
Example. Calculation tables for an apartment building.
When using plastic pipes, the internal diameter of the pipeline is taken into account.
| Floor outlet diameter, mm | Angle of joining the floor outlet to the riser, deg. | Maximum throughput of a ventilated sewer riser, l / s, with its diameter, mm | |||
| 50 | 85 | 100 | 150 | ||
| 90 | 0,8 | 2,8 | 4,3 | 11,4 | |
| 50 | 60 | 1,2 | 4,3 | 6,4 | 17,0 |
| 45 | 1,4 | 4,9 | 7,4 | 19,6 | |
| 90 | — | 2,1 | — | — | |
| 85 | 60 | — | 3,2 | — | — |
| 45 | — | 3,6 | — | — | |
| 90 | — | — | 3,2 | 8,5 | |
| 100 | 60 | — | — | 4,9 | 12,8 |
| 45 | — | — | 5,5 | 14,5 | |
| 90 | — | — | — | 7,2 | |
| 150 | 60 | — | — | — | 11,0 |
| 45 | — | — | — | 12,6 | |
| Note. The diameter of the sewer riser must be at least the largest diameter of the floor bends attached to this riser. | |||||
| Working height of the riser, m | Maximum throughput of a non-ventilated sewer riser, l / s, with its diameter, mm | |||
| 50 | 85 | 100 | 150 | |
| 1 | 1,6 | 5,3 | 6,3 | 14,0 |
| 2 | 1,0 | 3,1 | 3,7 | 8,0 |
| 3 | 0,6 | 2,0 | 2,4 | 5,4 |
| 4 | 0,5 | 1,4 | 1,8 | 3,9 |
| 5 | 0,4 | 1,1 | 1,4 | 3,0 |
| 6 | 0,4 | 0,8 | 1,0 | 2,4 |
| 7 | 0,4 | 0,7 | 0,9 | 2,0 |
| 8 | 0,4 | 0,5 | 0,7 | 1,6 |
| 9 | 0,4 | 0,5 | 0,6 | 1,4 |
| 10 | 0,4 | 0,5 | 0,6 | 1,2 |
| 11 | 0,4 | 0,5 | 0,6 | 1,0 |
| 12 | 0,4 | 0,5 | 0,6 | 0,9 |
| 13 and more | 0,4 | 0,5 | 0,6 | 0,9 |
Cuffs for sewer pipes with a diameter of 110 millimeters and more
Sanitary rubber cuffs are designed for tight connection between individual sewer and outgoing connections (washing machine, shower, toilet, and so on). There are the following types of lip seals:
- rod cuff;
- piston cuff;
- universal cuff.
Various rubber compounds (silicone, rubber, etc.) with the addition of polyurethane are used as materials for these products. Such compositions are distinguished by the high quality of their density, strength, while remaining elastic.
Can be used for indoor and outdoor use (installation). The dimensions of the collars correspond to the inner or outer diameter of the sewer pipe, depending on the type of installation of the collar. Like the main products (pipes), they have a state certificate and standards (GOST).
The parameters and dimensions of plastic sewer pipes depend on their area of \u200b\u200bapplication - whether it is an internal pipe or an external one. The outer ones have greater wall thickness, and, therefore, strength. There are plastic pipes and the material from which they are made:
- Polypropylene (PP) pipes, the most common option, are manufactured 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 dimensions". But in a market economy, the standard sizes of PP-pipes have developed independently: the following diameters of sewer plastic pipes are on sale: 32, 40, 50 and 110 mm; lengths: 150, 250, 500, 750, 1000, 2000 and 3000 mm.
- High density polyethylene (HDPE) pipes are produced in accordance with GOST 22689.2-89. Since they are produced coiled into coils and cut into pieces of any desired length, GOST establishes 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 the sewer plastic pipe from 10 to 1200 mm.
- Polyvinyl chloride (PVC) pipes. The dimensions of a sewer plastic pipe of this type are established by GOST 51613-2000. According to its instructions, PVC pipes should be from 10 to 315 mm in diameter, with a length of 4 to 12 m.
When arranging a sewer drainage system, you can use plastic pipes. It is important to know the diameter of pvc sewer pipes.
Variant products are produced according to strict regulations. For this reason, the diameter of the pipes can range from 5 to 11 cm.
How to choose the right drain pipe diameter
Even at the stage of the initial design documentation, the dimensions of the sewer pipes in the future building must be agreed. In 90% of cases, parts with a diameter starting from 100 mm are used to carry out the drainage system in the bathroom. To install the system in the bathroom or in the kitchen, it will be enough to use a 50 mm pipeline. The difference in the given values \u200b\u200bwas chosen for a reason. It is caused by several factors at once:
- A toilet is a plumbing fixture, a feature of which is the passage of a significant volume of water in a short time period (when you press the flush button). At the same time, the water can contain solid particles, which will be problematic for elements of a drain structure with smaller circumference than those given above. There is a high probability of blockages.
- Even without looking at the fact that when the water is drained from the bathtub, its volume is no less than the volume of water from the toilet, the diameter of the sewer pipe will be smaller due to a simple hydraulics rule - the throughput of the system should be equal to the value provided in the place with the narrowest circumference parameter. This release value in the bathroom is significantly less than in the toilet. Therefore, it is impractical to mount parts with a large diameter.
What are plastic products?
As noted, when installing a new or repairing an old sewer system, both plastic elements and cast-iron versions of products can be used. In this case, a plastic pipe can be of the following variety:
- Product from Pvc;
- of PP;
- of PAT.
The advantages of plastic
Any structural element made of the given materials has the following advantages:
- Sustainabilityto a variety of chemistry, for example, solvents or alkalis.
- Strength, allowing the part to be immersed in the ground at a distance of up to 16 m.
- Presence inside smooth surface, which creates an obstacle to the formation of plaque.
- Low weight... With a length of one hundred centimeters, an element with a circumference of 110 mm weighs about 1.5 kg.
Size and place of application of PVC products
The manufacture of pipes from polyvinyl chloride is regulated GOST R 51613-2000, or standard VSN 48-96... For the production of pressure parts, the specified GOST is used, and in the production of non-pressure parts, the standard is applied.
According to the data given in the standard, the diameter of non-pressure PVC sewer pipes can be:
- 50mm.
- 90mm.
- 110mm.
At the same time, plastic pipes for sewerage, the dimensions of which in length range from 0.5 to 8 meters, have an inner wall thickness of at least 3.2 mm.
Differences between pressure pipelines and gravity pipelines
Differences in pressure pipelines will be significant from the specified parameters of non-pressure systems. So, for example, the number of standard sizes of these products is 13 pieces. At the same time, PVC sewer pipes, the sizes of the diameter range from 63 to 315 mm.
The presence of such a choice of sizes plays into the hands of construction organizations. However, the following pipe diameters are often used:
- 7.5 cm. The product is used for making bends in bathrooms.
- 10 and 11 cm. Such parts are used for the external pipeline and riser.
- 20 and 30 cm. Products are used for drainage systems in industrial buildings.
PET pipes and where they are mounted
In the manufacture of polyethylene parts, the regulations of GOST 22689.2-89 are used. The specified products can be of four varieties of assortment with a diameter of 40 , 50 , 90 or 110 mm... When low-pressure polyethylene is used in production, the parameter of the wall thickness of the finished product does not exceed three millimeters.
High pressure PET is used for the production of pipes with a small circumference. The wall thickness parameter will be:
- 3 mm for elements with a diameter of 4-5 cm.
- Five millimeters for products with a diameter of 9-11 cm.
The pipe length can be up to nine meters. This parameter depends directly on the diameter. The larger it is, the longer the product will be.
Polypropylene drain elements
To regulate the quality of production, which produces plastic sewer pipes with various sizes, the table TU 4926-002-88742502-00 is used. According to the conditions specified in the document, the diameter of the finished product can be 50, 100 and 150 mm. The wall thickness parameter varies from 3 to 5 mm and depends on the circumference. You can use such products when installing risers, or for organizing a discharge line from a plumbing fixture.
It can be mentioned that well-known world manufacturing companies use polypropylene in the production of industrial pipes. The circumference of such products can reach 1.2 meters.
In order to select the required pipe diameter for the sewage system, you can use the recommended values \u200b\u200bfor performing such work. It is important to understand that the specified information can change in any direction and depend on the characteristics and features of the plumbing or sewage system.
- 11 cm... for the toilet, as well as the riser.
- 4-5 cm... for connecting a bathroom, sink, bidet, sink or shower stall.
- 2.5 cm... for connecting a dishwasher or washing machine.
- 5 cm to connect a combined drain or to establish wiring.
- 6.5-7.5 cm... for bends.
- 11-16 cm for conducting an external pipeline (the choice of option depends on the volume of wastewater).
- 15-20 cm... for connecting a sauna or bath.
- 20-30 cm... to connect the pool.
Recommendations for installing PVC pipes in a multi-storey building
In order to mount a drainage system in a multi-storey building, certain recommendations and rules should be followed.
One of the main rules in the list of rules is considered to provide air access to the sewer system. If it is not there, then a reduced pressure level is created during flushing, which leads to the suction of the water seal inside.
In a five-story house for a riser, it is enough to use the diameter of the sewer pipe for the toilet, which is one hundred millimeters. When the number of floors is large, an option with a diameter of 150 mm is required. In the sections of the system that are common to two or more risers, as well as at the exit to the well, a pipe with a diameter of 200 mm is installed. As noted, a cast iron pipe changes its inner diameter downward during operation. This cannot happen with plastic products, since their surface is smooth and no deposits remain on it.
It is important to know
If the correct angle of inclination of the pipe is organized and there are no factory defects on the inner walls in the form of roughness or irregularities, no dirt remains on the walls (sand together with silt). Thus, when replacing a metal structure with a plastic analogue, elements of a smaller diameter can be used. For example, if a cast-iron pipe of the fifty was originally installed in the house, then it can be replaced with a plastic forty. Or a 110 mm plastic sewer pipe - such dimensions will allow you to change a 120 mm cast iron analogue.
It should also be remembered that any narrowed place in the sewer is considered potentially dangerous for the appearance of blockages. Each connection located in the horizontal plane should be carried out using oblique tees. Rectangular connectors can be used only at the joints of the riser with a horizontal section. This type of installation will avoid the nuances associated with removing blockages.
Should adhere to
In addition, you should adhere to the following recommendations:
- There must be a distance between the two nearest fastener connections corresponding to a value of at least 10 diameters.
- On long sections, as well as when changing the direction of flow, it is necessary to mount special elements called revision. They serve for cleaning in case of possible clogging.
- The optimal slope parameter is 20 mm. If the value is much less than the specified value, the drains will drain very slowly. If, on the contrary, the slope is increased, then the water will create a lot of noise and the system can clog up much faster.
- When using polyvinyl chloride, it is important to remember that this material expands when exposed to high temperatures.
- For cutting, you should use a grinder or a hacksaw. Next, it is imperative to remove the chamfer.
Installation of the sewerage system will not cause difficulties even for a novice master. It is important to carefully select the diameter of the pipes in accordance with the calculated parameters.
Norms governing the diameters of the drainage system parts
To regulate any structurally required size of the sewer pipe, it is used SNiP 2.04.01085... This document provides options for calculating each parameter of the product, taking into account various factors.
It is important to remember that the inner diameter of a metal product decreases during long-term operation due to silting.
Dimensions of metal products
Sewer pipes made of cast iron can be divided into several types, based on their functionality:
- SMU. There is no detachable connection in these products, that is, both sides will be smooth;
- SME. A socket is installed at one end. The other side of the product is smooth.
The size set in the marking characterizes the inner diameter. For example, the index DN 100 will mean that the parameter is 100 mm. In this case, the total volume of the product, together with the walls, is 110 mm.
Options
The standard marking of cast iron pipelines is from DN 50 to DN 400. Products that do not have sockets, that is, with smooth sides, have an increased safety margin. Their length is three meters. SMU pipes can be produced in lengths from 15 cm and more.
The parameter of the wall thickness of a cast-iron pipe is almost identical to plastic products and is equal to 4-5 mm. However, despite the similar dimensions in length, wall thickness and diameter, the weight of a metal structure is 10 times that of a plastic pipeline. For clarity, a meter of a metal product will weigh about 15 kilograms. Accordingly, a plastic pipe of identical dimensions will weigh only 1.5 kilograms.
Advantages of metal parts of the drainage system
- Durability. The service life of cast iron is at least 60 years.
- Strength. Such elements can be used to build a riser of any size.
- Simple installation due to the presence of sockets.
Metal drain pipes cannot boast of such a range of material selection for production. Such parts are made exclusively from cast iron. However, this metal can boast of certain advantages:
Of course, metal parts are much heavier than their plastic counterparts. However, this disadvantage is more than offset by reliability and safety margin.
Since plastic elements can be of three types, when installing such products, one should understand their technical, as well as basic differences. The only constant parameter for each type of plastic is the diameter.
By the way, this circumstance allows you to use several types of material when arranging the drain.
Everything useful about sewage -
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 the 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 PVC and cast iron products have.
They are produced in accordance with TU 2248-022-23208482-02, which allows you to choose an option for any system.
What are the pipes for sewage
Today, sewer systems are made of two types of pipes: plastic and metal. Plastic can be of three varieties, from:
- PVC - polyvinyl chloride;
- PP - polypropylene;
- 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 to prevent plaque build-up on the 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 offset by their colossal strength.
After familiarizing yourself with the properties of the two types of pipes, you can proceed to their sizes.
Sizes of plastic pipes
As mentioned above, there are three types of plastic pipes: PVC, PP, PET. They differ from each other in both basic and technical characteristics.
And only the sizes remain standard, regardless of the type. Thus, in one system, it is allowed to use several types of different materials.
Size and application of PVC pipes
PVC pipes are manufactured in accordance with GOST R 51613 - 2000 and VSN 48 - 96. Pressure pipelines are regulated by GOST, and gravity pipelines are regulated by construction standards (VSN).
In accordance with building regulations, free-flow pipes have three diameters - 50 mm, 90 mm, 110 mm. The wall thickness is 3.2 mm, the length is 0.5 - 8 m.
Pressure heads differ significantly from their free-flow 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 100 and 110 mm options, then 75 mm pipes are very popular. They are used as branches from baths and showers.
- Pipes with a diameter of 100 and 110 mm are used for the construction of risers and the installation of external pipelines.
- 200 and 300 mm pipe is used for the installation of industrial sewage.
Sewer pipes PET
Polyethylene pipes are produced in accordance with the regulations of GOST 22689.2-89, and have only 4 varieties of assortment. The diameter is 40, 50, 90 or 110 millimeters. If the pipe is made of low pressure polyethylene, then its wall thickness will be only 3 mm.
High-pressure PET pipes are produced with a smaller diameter, 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 depends directly on the diameter of the product. The larger the diameter, the greater the length of the segment.
Polypropylene pipe
Inner pipes made of propylene are manufactured in accordance with TU 4926-002-88742502-00. According to 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 more dimensional polypropylene analogs that are used for laying external drains. For example, products of well-known brands Pragma and Korsis can have a diameter from 110 mm to 1.2 meters.
Dimensions of cast iron sewer pipes
By functionality, they are divided into two types:
- SMU - there is no detachable connection, i.e. both ends are smooth;
- SME - equipped with a socket at one end, smooth at the other.
The size is characterized by the inner diameter, for example: marking DN 100 means that the diameter on the inside is 100 mm, and on the outside it will already 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 ordinary split pipes can be from 15 cm and more.
The wall thickness of cast iron pipes practically does not differ from plastic ones and is 4 - 5 mm. But despite the same dimensions - length, diameter and wall thickness, the mass of metal and plastic products differs significantly. So for example, 1 meter of a 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 familiarize yourself with the recommended values \u200b\u200bfor the diameter of plastic pipes for conducting or. All the given data are of a recommendatory nature and may change up or down, depending on the technical characteristics of the plumbing fixtures or the sewer system.
So, today it has become much easier to mount the sewer system, the main thing is to purchase pipes and accessories strictly in accordance with the design parameters.
Video: Sewer pipe dimensions