Plastic pipes in water supply and sewerage systems will not surprise anyone today. They are confidently ousting their metal counterparts from this niche of the plumbing market. Plastic pipes, including PVC products, resistant to chemically active substances, not prone to corrosion and more durable. Modern industry produces several types of such pipe products. Their characteristics and main differences will be considered below.
Modern industry produces a wide range of PVC pipes to solve a variety of problems
Types of PVC sewer pipes and their features
Installation of sewer systems is based on the following types of PVC products:
- gray pipes. Are intended for laying of an internal network of removal of household drains. The main diameters of gray PVC pipes are 50 and 110 millimeters. Such sizes give the chance to lay plastic sewer lines from any household and sanitary devices.. And the wide range of fittings allows to create the highway of a different configuration. This factor is of great importance when working indoors. The strength characteristics of gray PVC pipe allow it to cope with normal loads, arising in internal networks. But due to lack of rigidity, such an element of engineering communication is not allowed to be laid in the ground;
- orange tubes. External networks - this is the main area of application of such products.
Useful Information! Orange sewer pipes should not be used in indoor networks, as they are less resistant to high temperatures.
The standard diameters of PVC plastic pipes are orange 110 and 150 millimeters, which makes it possible to organize the removal of sewage from any buildings and premises. Their main advantage - increased strength - is provided by a combination of two factors. These are the unique physical properties of the material itself and the increased wall thickness.
In practice, orange smooth-walled products of such stiffness classes are mainly used to create external highways.:
- SN 4: Withstand periodic loads, which are produced by passing low-tonnage vehicles;
- SN 8: Characterized by high strength. Laying of products of this class is allowed under highways with heavy traffic;
- corrugated pipes. Such plastic products are characterized by even higher mechanical strength. The area of the outer surface of the corrugation with a variable cross section is larger, than a smooth element of the pipeline of the same diameter. Due to this there is a redistribution of soil pressure. That is why corrugated pipes, even large ones, can withstand significant loads.
Gray smooth pipes, mainly, are intended for the internal sewerage, therefore, they are presented on the market in small diameters
The industry produces two types of such products:
- single-layer. The inner and outer surface of the ribbed. The price of a single-layer corrugated pipe is relatively small. However, the efficiency of sewage disposal is significantly deteriorating;
- two-layer. The inner surface is smooth, and the outer ribbed. This design provides a level of flow resistance not greater, than in traditional smooth-walled sewer pipelines with similar dimensions.
Typical diameters of corrugated PVC pipe vary in the range:
- external 110? Dnar? 1135 mm;
- internal 93? Dvn? 1000 mm.
Corrugated gray and orange products are widely used in the arrangement of filtration fields. This material significantly increases the service life of the drainage system and its durability. If we talk about drainage highways, then their arrangement without PVC corrugated products is simply impossible.
in addition, corrugated plastic pipe products are used in the laying of electrical communications and performs the function of their protection against mechanical damage. But there is another factor, as a possibility of fire in the event of a short circuit. And from this point of view, corrugated PVC pipes are a great solution. It's not just about that, that they ignite at temperature 400 ° C. Corrugated PVC products also self-extinguish.
Advantages of PVC pipe products
The advantages of plastic PVC pipe are more than enough. Of these, it is worth noting:
- high strength;
- the absence of overgrowth of solid deposits of the inner surface. Moreover! PVC sewer pipe is self-cleaning. That is, the homeowner will not have to clean the system regularly;
- durability. Drainage, containing abrasive inclusions, does not damage the inner surface of the pipeline;
- environmental safety;
- affordable price.
PVC pipes can withstand heavy loads without losing performance, they are suitable for laying in the ground
This list goes on and on. However, the above advantages are enough, to give preference to products when creating a PVC sewer pipe.
Wrinkle! But do not forget about the disadvantages of PVC products: the maximum allowable temperature of the working environment, transported over a long period of time, is +40 ° C. Declared by many manufacturers +60? C are allowed for short-term movement of liquids with this temperature. Prolonged contact with hot water leads to a sharp reduction in the service life of PVC pipeline.
How to buy PVC products for the sewer
The wide range of polyvinyl chloride products complicates their choice. Before buying, pay attention to the following physical and technical characteristics of such pipes.
- strength. The low density of the material leads to sagging of the pipeline in long sections. Especially noticeable increase in the size of PVC pipes, when it is filled. So, performing installation of such sites, you will have to use additional brackets;
- working environment. The presence of aggressive liquids in the created sewerage system is not excluded. It is important, example, for small productions. That the pipeline served long in such operating conditions, compare the characteristics of its plastic components with the estimated composition of wastewater;
- section length. As you know, linear dimensions of PVC pipes are different. Therefore at development of the project of sewer system it is necessary to measure all distances. It is better to use whole pipe products without any additional connections to form straight sections;
- pipe diameters. Different sections of the drainage system are equipped with pipes of different cross sections. To arrange a drain from the bathroom, you can use products with diameters 50 millimeters. And the connection of the system to the central riser should be made by a pipe with a cross section of 100 millimeters.
The table of diameters of PVC pipes and linear sizes of bells is presented ??lower.
Table 1
| Inner diameter of the bell (minimum), mm | Nominal diameter of the pipe | mounting length | the length of the bell | ||
| Extended bell, mm | Normal. funnel, mm | Extended bell, mm | Normal. funnel, mm | ||
| 631,9 | 630 + 1,1 | 242 | 228 | 361 | 228 |
| 501,5 | 500 + 0,9 | 212 | 200 | 323 | 200 |
| 401,2 | 400 + 0,7 | 188 | 178 | 291 | 178 |
| 316 | 315 + 0,6 | 171 | 158 | 272 | 158 |
| 250,8 | 250 + 0,5 | 167 | 125 | 265 | 125 |
| 200,6 | 200 + 0,5 | 133 | 90 | 226 | 90 |
| 160,5 | 160 + 0,4 | 123 | 74 | 214 | 74 |
| 110,4 | 110 + 0,3 | 113 | 58 | 201 | 58 |
Buying polyvinyl chloride pipe products, require a certificate of quality in the trade enterprise. So you will be convinced according to the declared technical characteristics of real value.
Pipes of different sizes are required to install the same system - the larger the drain volume, the wider the pipe should be
PVC pipes for water supply. Pros and cons
These products began to be produced in the second half of the second half of the XX century in Germany. The main requirement, applied to PVC pipes, is their ability to withstand considerable pressure levels in the system. That is why this type of plastic pipes is used to create water supply, as NPVH. The letter "H" is an abbreviation of the word "pressure". Unplasticized polyvinyl chloride is used as a raw material for their production, characterized by high resistance to various chemical influences. The final product is a rigid gray pipe with bells.
The main advantages are worth noting:
- low level of thermal conductivity. Compared to metal, the value of this indicator in polyvinyl chloride is much less;
- ease of installation. It is provided not only thanks to small weight of a pipe of PVC. Products for plumbing from unplasticized polyvinyl chloride are easily cut and bent. Due to this, resizing to the required configuration of the pipeline is performed without any problems;
- resistance to corrosion and rot;
- low propensity to ignite. The flash point is +500? WITH;
- reasonable for the budget of most of our compatriots.
Useful Information! Among other things, low thermal conductivity prevents cooling of water flowing through plastic NPVH.
Weak sides:
- at lower temperatures -15 ° C operation is not allowed. Even small sections of NPVH water supply, coming out of a private house, it is necessary to insulate;
- the upper temperature limit is limited by the plus sign 60? WITH;
- the presence of mechanical damage reduces the resistance to shock loads.
PVC pipes of any size can be connected with glue, this greatly simplifies installation and provides high strength and tightness of the system
Technical characteristics of polyvinyl chloride water pipes
In the table below you will find sample information on the diameters and sizes of PVC pipes for plumbing.
Table 2
| Outer diameter (nominal) Dн. | Minimum wall thickness (nominal) | ||||
| Series, S | |||||
| S5 | S8 | S12.5 | S10 | S16 | |
| SDR11 | SDR17 | SDR26 | SDR21 | SDR33 | |
| Working pressure PN (nominal), there is | |||||
| PN20 | PN12,5 | PN8 | PN10 | PN6 | |
| 90 | 8,2 | 5,4 | 3,5 | 4,3 | 2,8 |
| 75 | 6,8 | 4,5 | 2,9 | 3,6 | 2,3 |
| 63 | 5,8 | 3,8 | 2,5 | 3,0 | 2,0 |
| 50 | 4,6 | 3,0 | 2,0 | 2,4 | 1,6 |
| 40 | 3,7 | 2,4 | 1,6 | 1,9 | 1,5 |
| 32 | 2,9 | 1,9 | 1,5 | 1,6 | — |
| 25 | 2,3 | 1,5 | — | — | — |
| 20 | 1,9 | — | — | — | — |
| 16 | 1,5 | — | — | — | — |
| 12 | 1,5 | — | — | — | — |
Making a choice, do not forget about the effect of the size of plastic pipes for plumbing on communication capacity and fluid pressure. Preferring products of small diameter, you run the risk of experiencing a breakthrough in such an area. And vice versa, too large a cross section of the plumbing elements will cause a low pressure of the liquid.
As you know, the weight of the pipe - the value derived from the diameter and thickness of the walls. And the value of this parameter in polyvinyl chloride products is several times less, than the same size, but metal. With, modern technologies for the production of polymer pipe products are aimed at further reducing material consumption without compromising strength. The result is new plumbing products with less weight per running meter. From this point of view, The development of multilayer plastic pipe products is considered to be a milestone. The mass of such a structured structure in 2,5-3 times less, than the weight of the monolithic PVC component of the pipeline. And this trend is observed not only in the case of polyvinyl chloride pipe products.
Useful to know! Many similar elements of engineering communication with PE100 on 40% Less, than with PE63.
Numerical values of weight of one running meter of PVC pipes for a water supply system depending on their diameters and a class of ring rigidity, you will learn, having studied the third table.
Table 3
| Pipe diameter, mm | SN8 | SN4 |
| weight, kg | weight, kg | |
| 500 | 24,67 | 19,6 |
| 400 | 15,32 | 12,84 |
| 315 | 9,54 | 7,91 |
| 250 | 5,97 | 5,01 |
| 200 | 3,39 | 2,95 |
| 160 | 2,27 | 1,83 |
| 110 | 1,04 | — |
In conclusion, a few words about the storage of these products. Do not expose it to direct sunlight. It is also impossible to move PVC pipes by drag, they can only be transferred. in addition, there are often cases of their damage during transportation. Therefore, when buying it is not superfluous to inspect the product.