Along with the depth of the borehole, great importance has its diameter. The fact is that the complexity and cost of drilling depends on this parameter. In addition, different water well diameters directly affect performance characteristics design and the way it is maintained. Therefore, the choice optimal size it is better to take care in advance - even at the design stage of the water supply system.

The diameter of the well means the internal size of the production string, into which pumping equipment, a water-lifting pipeline and other equipment are lowered. At the same time, direct drilling of the soil is carried out with a larger drill, especially when arranging a two-string borehole structure.

Interesting to know. Drilling in two columns is carried out if other horizons are located above the main aquifer. In this case, the outer casing (conductor) protects the main horizon from the penetration of water from the upper sources, and the production column located inside performs the organization of water intake.

Construction of a well with two columns

From a performance and maintenance point of view, a large borehole pipe diameter is more preferable. Firstly, the volume of the filter zone increases, which means that with the same capacity of the aquifer, more water can be pumped out per unit of time (although the flow rate of the source remains the fundamental parameter). Secondly, it becomes possible to use larger (and more powerful) equipment, and the process of repair and maintenance of the structure is also greatly simplified.

On the other hand: a large diameter is a high price. With a doubling of the drilling width, the cost of work increases by almost three. Therefore, it is very important to make the calculation in such a way as to satisfy both financial and consumer needs.

Production pipes for water wells

The size of the pipe can be different and depends on what diameter the well will be drilled. The casing string is installed after or during drilling to protect the inner walls from rock shedding. To strengthen the structure between outer surface and a concrete solution is poured with soil, after which further well construction is carried out: pumping equipment is installed, a pipeline is installed, the top is closed with a cap.

Applicable materials

Pipes that are used for well casing are made from:

• asbestos cement;
• become;
• plastic.

Asbestos cement has been proving its suitability in the field of water supply for several decades. Such products are not afraid of corrosion, are chemically neutral and have good durability. However, the fragility of the material makes the installation extremely careful. Usually, the installation of asbestos-cement columns is entrusted to specialists.

Steel structures are quite often used for casing of artesian sources. Such a product is able to withstand heavy loads created by soil layers, so it is not afraid of rock movements. Diameter steel pipe for a well can vary over a wide range, and the service life is more than 50 years.

Worth paying attention. One of the disadvantages of steel pipe is its susceptibility to corrosion. As a result of the oxidation reaction, rust forms on the walls over time, which can supersaturate the water with iron.

Well casing steel

Every day, plastic casing pipes are becoming more and more popular, which have a significantly lower weight with good reliability indicators. They do not corrode and are not subject to chemical attack. environment, so they can be used for more than one decade. The relatively low price makes plastic products even more attractive. Nevertheless, for difficult soils, metal is still considered more preferable.

Technical indicators

Production strings are subject to certain requirements, which primarily relate to wall thickness and diameter. For standard use, the non-straightness of these indicators is permissible, not exceeding 0.7 mm per 1 m. However, in some cases, the non-straightness threshold can be more stringent - 0.5 and even 0.3 mm per 1 m.

When arranging artesian wells, columns with a diameter of 90-165 mm are most often used. For sand wells, in order to prevent rapid silting, it is recommended to make a hole from 125 mm. Although, for example, in Abyssinian wells the diametral size of the production string rarely exceeds 50 mm.

More detailed information the existing diameters and wall thicknesses in casing strings can be found in the corresponding table:

PVC Casing Size Chart

The dependence of the diameter of the production pipe on the dimensions of the pump

The diameter of the water well directly depends on the type and size of the pump, and vice versa, the choice of pumping equipment is carried out in accordance with the dimensions of the casing string.

Borehole diameter for pumping station

If the water mirror is close to the surface, then self-priming surface pumps can be used for water intake, which are often bundled with hydraulic accumulators and are called pumping stations.

Interesting to know. The principle of operation of self-priming units determines the depth of water intake, which does not exceed 9 meters. Therefore, at lower water levels, submersible devices are used that can lift water from a depth of more than 50 m.

Using pumping station the diameter of the water well depends on the diameter of the water pipe or hose that goes down. As a rule, in this case, a 50 mm casing is sufficient to ensure the normal operation of the water supply system.

During operation surface pumps a small hole in the ground is enough

Well diameter for submersible equipment

The minimum diameter of deep well pumps is 3 inches (76 mm). The installation of such devices can be carried out already in a 90 mm casing pipe. However, for domestic needs, in most cases, 4-inch units are used, which are cheaper and have higher performance. For their normal placement, a production string of at least 110 mm is used.

Advice. Experts recommend giving preference to larger boreholes. The difference in the cost of drilling a 90 mm and 110 mm hole is not so significant, while it is much easier to maintain a 110 mm column.

The distance between the hull and the casing wall should not be less than 2 mm along the entire radius. At the same time, for vibration submersible pumps this criterion is more stringent, since direct contact with the production string may result in structural failure.

The reserve for submerging the pump must be sufficient for the normal operation of the well

An example of calculating the diameter of a pipe for a borehole pump

To accurately determine the diameter of the pipe for a well pump, you can use a simple formula:

D(casing) = D(pump) + clearance + wall thickness

Thus, for a 3-inch unit, the minimum diametral hole size will be:

D=76+4+5=85mm

Based on this, a column of 90, 113 or 125 millimeters (in accordance with the table above) is suitable for such devices.

For 4" (102 mm) submersible pumps, the allowable casing size will be different accordingly:

D = 102 + 4 + 5 = 111 mm

According to the table, we select the required dimensions: 113, 125 or 140 millimeters.

Advice. It's better to give preference larger size columns to reduce the likelihood of jamming of pumping equipment during installation and during operation.

On the one hand, a small diameter well is difficult to maintain and tends to rapid siltation, on the other hand, drilling and arranging too large well holes is financially unprofitable. Sometimes it is very difficult to find the most rational solution on your own. In this case, it will not be superfluous to take the help of specialists.

Quality of the material: (Your assessment of the article?)

Plastic casing

Casing pipes made of plastic have gained wild popularity and are offered by any drilling company, we are no exception and also lower them into wells. Often, plastic is placed inside the steel casing, but some can only case the well with plastic pipes. Now we will leave a detailed review of plastic pipes, in which we will find out which well is better made of plastic or metal, share our experience, dispel some myths, and talk about the main differences between pipes.
We will also tell you why they began to use HDPE pipes in the well at all and whether this is a scam.

To begin with, let's decide what is better for a HDPE or PVC well. As PVC is known to be poisonous and release vinyl chloride, some countries have long abandoned its use. HDPE material is neutral and is widely used not only for water supply of a private house, but also in urban networks.

Casing pipe 125 mm

The main diameter of the HDPE pipe for wells, which, as a rule, is installed inside a steel 159 mm or 152 mm pipe, but sometimes they are used without a metal casing.
In the Moscow region, a 125 mm HDPE pipe with a wall thickness of 7.1 mm is very popular. If this 125 mm food grade blue pipe is placed without steel, then the 9 mm wall version is used.
we wrote everything about the construction of metal 159 + plastic 125 mm and why it is needed.
At the ends of the 125th pipe, a thread is cut, through which one pipe is connected to another.

Pros and cons of casing 125 plastic pipe:

• Cheap. Allows you to significantly reduce the cost of the well, compared with a metal pipe.
• Any pump for a well 125 mm in diameter will do. Inner diameter this pipe is 111 mm, which means any inexpensive 4-inch borehole pump enter it without problems.

• It is impossible to case wells without steel to a great depth.

Casing pipe 117 mm

Due to the fact that steel is drilled with a thin 133 mm pipe, the wall thickness of which is 4.5 mm (or less), and the inner diameter is 124 mm, it became possible to install a 117 mm HDPE casing pipe into it, where it works as a production string.
You can find out why you need a well 133 mm + HDPE 117 mm.
This is a complete analogue of the 125 mm pipe described above, but slightly smaller. Its internal diameter is 102 mm (in practice 100-101 mm), which makes it possible to butt up a 4-inch pump and get problems trying to get it out of there when it breaks. That is why in HDPE 117 mm it is better to install a pump with a diameter of 3 inches or 3.5 inches.

Advantages and disadvantages of 117 mm HDPE pipes:

• Extremely cheap.
• A 4" pump can be installed.

• It is almost impossible to get a 4" pump out of the well. Outside, this pipe is beautiful and round, but inside there are sags and bumps. Plus, during operation, the pump can pull up micro-particles of sludge that will stand between the pump and the pipe. The joints of the pipes with each other are also not perfectly even, and even ultra-small protrusions will already be a problem if the pump is placed so tightly.
  Remember, most drillers just have to get done and go, and you have to get that pump out when it breaks. The cost of repairing a well can be a very unpleasant surprise.
  

Well pipe 110 mm

This size of plastic pipes is used in seamless 133 mm pipes or in reinforced seam pipes. Due to the greater wall thickness, the inner diameter of these 133 mm pipes is 123 mm and due to technical features, it is impossible to drill into them under plastic 117 mm HDPE. Thus, we came to a pipe of even smaller diameter - 110 mm. The wall thickness of this pipe is 6.3 mm, but due to the small diameter, this is offset by increased rigidity.

Advantages and disadvantages of casing 110 mm HDPE pipes:

• Cheap.

• The inner diameter of a plastic 110 mm pipe for a well is about 97 mm, which means that you will have to install an expensive 3-inch pump, like Grundfos SQ. But if the well is small, then you can get by with more democratic Speroni or Chinese pumps.

Well without plastic pipe

It is possible to drill an artesian well without the use of plastic if there are pressure horizons. For example, if after drilling a well, water has risen into steel pipes, and the pump will also stand in a steel casing pipe. But even in this case, it is advisable to plant limestone because it is a kind of rock: it can become limp, it will begin to fill up the trunk ...
This is not such a big nuisance, but we want a hassle-free design.

In places where limestone is interlayered with clay, it is always necessary to plant limestone, because the clay will tint the water, and then completely tighten the well. In such cases, the area with clay is covered with a solid pipe, and perforations are made in the area of ​​the water carriers.

In general, there can be many designs of a water well, and they all depend on the geology of the area, where it is needed, and where it is not. So you can't choose how to do with or without plastic. Plastic is not a luxury, HDPE pipe is a necessity. If in your case you need to supply HDPE, but you refuse, then you will have to lower a more expensive steel pipe.

• Some drilling firms underestimate the price of a drilling meter, naming the cost without HDPE pipes. You order a well, and in the process of work it turns out that you cannot do without a plastic casing pipe and you need to pay extra. You either pay extra and are left without the saved 10,000 rubles, or the drillers take money for exploratory drilling and leave, and you are left without money and without a well.
  Self-respecting companies warn in advance about possible complexity geology and the need to use double casing.
  we wrote more about possible cheating by drillers.

Well casing with plastic pipes

So, the well is drilled and cased with a steel pipe to the limestone, the water is in the limestone and does not rise into the steel pipes. You cannot lower the downhole pump into bare limestone (because it will get stuck), so it is pre-lined with an HDPE pipe and then a pump is placed in this pipe.
Previously, metal pipes were used for casing limestone, but they are expensive, today competition has grown rampant and in pursuit of best price everyone switched to plastic pipes.

When casing limestone, it is customary to bring a plastic pipe several meters above the water so that it does not surface.

It is common for people to bring a plastic pipe under the top of the well. It does not make any sense, it is enough to bring the pipe 3-5 meters above the water and it will no longer emerge, the rest is a waste of money.

There is a widespread myth that if you bring a plastic pipe to the top, then this gives additional protection from ground water in case of through corrosion of a steel pipe. We have to disappoint you: this will not work in most cases. If a steel pipe rusts, then water will get into the annulus, from there into the limestone, and then into your house. If the steel rusts very strongly, then the plastic will squeeze with clays.

But sometimes they implement such a well design when a plastic pipe is not lowered to the bottom, but a kind of pocket is made in limestone, where the plastic will be covered with clays. This will protect the well from perched water even in the case of through corrosion of steel.
Some drilling organizations offer to put a packer in the well, which looks like a winding on a plastic pipe, it is designed to close the space between plastic and steel and ensure tightness. But while the pipe is lowered with winding into the well, this winding will loosen, break and there will be no sense from it. But the main thing is that no one will ever understand whether the packer is out of order or not, because the water will still be clean and transparent.
Meet more complex options packers, but this is additional money, additional time for their installation, and now all companies are on the path of extreme cost reduction and no one will do this for free.

And now the most popular: many drilling organizations say that by installing a plastic pipe, you will only drink water from it. They just throw this pipe down the well and it hangs out there. There is water in it, but there is also water between the plastic and steel pipes. It's not supposed to talk about it, you won't know it anyway. This is how most drillers work without proper experience.
Naturally, if the steel rusts, then the top water will be in your tap.

How to make a well only from a plastic pipe

Some offices practice well casing with plastic pipes without a steel column, they say, plastic is eternal, does not corrode and is environmentally friendly. Let's find out how justified it is to use only plastic in the well.

So, the strength of plastic is lower than steel, so you need to take a pipe with a wall of at least 9 mm. When using a standard wall of 7.1 mm, you are waiting for the collapse of the HDPE casing in the well.
This is experience verified information.

It is especially unpleasant if such a well is made by covens. Usually the scheme is as follows: they make a well, take the money and leave, then the pipe collapses, and it is no longer possible to get through to them. We see such cases from time to time.
Here is one of them:

Further, the difficulties with how to case a well with a plastic pipe. For example, a steel pipe can be rubbed into limestone and thereby isolate the annular space, steel can be twisted, knocked and everything will be fine with it. It won't work with plastic.
The plastic casing pipe just stands on the limestone and then as lucky. The limestone surface is not perfectly flat and there will be gaps between the limestone and the pipe. Even if you are lucky and everything works fine, then there are no guarantees that, after a while, the clay plug will not wash out under the casing shoe and dirty water will not flow.

The second moment in casing: plastic floats in water, and the well is casing when it is filled with drilling fluid, the density of which is even higher than water. Instead of standing up more tightly on the limestone, the plastic pipe is constantly rushing outward with great force. Therefore, they try to crush it with a load and wait until the pipe is covered with clay.

If you need to sit down and continue drilling in a plastic pipe, then you need to try very hard not to break this pipe. Sometimes a boulder can be caught behind the plastic, which will push the HDPE pipe inward and a hole will be rubbed there during drilling.
As you have noticed, the technology of casing with HDPE without steel is somewhat more complicated than with a conventional metal pipe, and drillers without steel are mostly beginners.

Drilling a well with plastic casing is promoted solely for the purpose of saving money, because the price of a HDPE pipe is lower than a steel one.

Which well is better made of plastic or metal

In the end, let's summarize, especially for those who are too lazy to read all the material, we will immediately decide which casing is better than HDPE or steel.
The plastic is good and keeps the cost of drilling down, it works great but if protected iron pipe. A steel pipe is also good, but it is installed before the limestone, and the limestone itself needs to be cased with plastic. In our area (in the south of the Moscow region) it is impossible to leave limestone without casing. That's why, perfect combination it's iron and plastic.
If there is no trust in HDPE, you can overpay and make metal and metal.

Well drilling is a complex technological process that involves the use of additional Supplies. One of the cost items is the casing pipe. When it comes to material selection, there is a balance between quality and material price. Which casing pipe is better and more practical to use? About the difference and selection criteria we will talk in the article.

What is a casing pipe

Casing pipe is used in drilled wells. The wellbore passes through various layers of soil. Most of them are loose, so without proper care, the well will quickly become unusable. The purpose of the casing is to fix and hold the walls in their original state. This also applies to those moments when the displacement of the soil occurs. Separate sections of the casing pipe are firmly connected to each other. At the same time, they must form a sealed structure that will not allow rain or other water to enter the well. In addition, the casing pipe is able to raise the water table so that the pump does not lower to the bottom of the well. Due to the purpose of the casing pipe, it must have the following qualities:

• high strength;
• pressure resistance;
• resistance to corrosion.

These characteristics correspond to pipes that are made of iron, stainless steel and some types of plastic, are also used asbestos-cement pipes. The casing pipe must have a minimum diameter that the pump can fit in, in most cases it starts at 110 mm.

Metal variant

This option is one of the most common and used. Previously, cast iron casing pipes were used. If you choose a product with a wall thickness of 6 mm, you can be sure that the well will last up to 50 years or more without any problems. In this case, the pipes will not lose their strength and will not have a negative effect on water quality. In modern practice, steel pipes are used. They can be called environmentally friendly. Water, when interacting with metal, does not form harmful chemical compounds that could harm human health. During prolonged use, rust may appear in the water, but it does not dissolve and is therefore easily removed with a conventional fine filter.

The round shape of the steel nozzle provides it with excellent mechanical strength. It easily supports the weight of the entire structure, as well as the mounted pump. Steel will protect the well when the soil layers are shifted in a small range. A well that has such a casing string is perfectly cleaned by pressure washing. In case of large silting, a drilling mechanism can be used to deepen. Metal columns are great for artesian wells, which can be drilled to a depth of over a hundred meters.

The main disadvantage that stops many from using this type of casing is its high cost. With a sufficient budget, it is better to choose this option, if it is limited, then it is worth weighing all the indicators and considering if there are more profitable option. Pipes that are made without a seam have greater strength. They are harder to bend and last longer. These are often used for the construction of gas pipelines.

Corrosion resistant pipes

Installing stainless pipes as casing is an excellent option. There are two types of such products: galvanized steel and stainless steel. Each has its own advantages and disadvantages. But it is worth thinking about the appropriateness of their use. If the service life of an artesian well is on average 50 years, and ordinary metal pipes can serve the same amount, then is it worth investing unreasonably additional funds. Galvanized pipes are a poor candidate for this application. The reason lies in the zinc itself. If you pay attention to galvanized roofs, then over time they become rusty due to exposure to sedimentary moisture. The same situation awaits branch pipes in the casing string. But at the same time, harmful components will get into the water, which will adversely affect health.

Some experts suggest using enamel coated casing. The same is true for some types of dishes. It really protects the surface perfectly and has no negative effect on the body. But everyone has seen what happens to an enamel pot if it is accidentally dropped. The enamel is chipped and the place under it begins to rust. Since nozzles in the well can experience an impact that is several times greater than the force of a normal fall, the feasibility of such a solution should be seriously considered. The destruction of an enameled pipe occurs faster than a conventional metal one. This is due to the fact that the thickness of the metal in such pipes is less.

Advice! Given the above information, you should not follow the lead of marketers and overpay for something that cannot be fully used.

Is asbestos cement good

Another option that is widely used for casing wells and wells is asbestos cement pipe. Not every drilling company will decide to use such material, because it has some features that not everyone knows how to work with. The cost of such a casing string is somewhat lower than that of a metal one. The advantages include the environmental friendliness of the material. Asbestos cement does not react with impurities that may be contained in water, which means that no emissions occur. harmful substances. It is widely believed that asbestos cement stimulates growth cancer cells, but this has not been proven in studies. With pressure, a small part of the fibers can really be lifted, but if a cleaning filter is installed, then they will remain in it.

The disadvantage of asbestos-cement pipes is their mechanical instability. With strong compression or impact, they can lose their strength and tightness. Unlike metal pipes, when using asbestos-cement pipes, it is impossible to make an additional deepening after some time. For asbestos-cement pipes, a well with a larger diameter will be required than for metal pipes. This is due to the design of the pipe. For its stability it is necessary to make thick walls. Pipes of this type are suitable only for limestone wells, while its depth should not exceed one hundred meters. The disadvantages of the material include poor sealing of the seams. This is due to the absence of any fixing elements, except for the expansion of the neck.

Note! Concrete is a porous material. Various debris and silt can clog into the pores, which is almost impossible to clean out from there.

Can plastic be used

Many well drilling companies like to use plastic casing pipes. Polyethylene can serve as the basis for such pipes. low pressure, PVC unplasticized and polypropylene. The service life of such pipes can reach hundreds of years. Polymers do not interact with well water, therefore they do not decompose and do not corrode. The bacteria found in the soil are also unable to decompose plastic into short time. The listed types of polymers do not release any substances into the water, so there is no danger to health. But this is only on condition that the pipes are purchased from a responsible manufacturer. Delivery and installation of pipes made of polymers are much easier than metal counterparts.

The limitation on the use of plastic casing pipes is the maximum depth of the well. Products are suitable for a maximum sand well, which does not exceed 60 meters. Plastic also does not tolerate low temperatures well. It becomes brittle and can be easily damaged. A plastic casing can be installed if it is known that the area is free of heavy ground movement.

Combined options

For some types of wells, combined casing strings are used. The essence of this design is that the main casing is carried out using metal pipe, and plastic is placed inside. The advantage of this solution is the minimum amount of rust in the water. Extends the service life of the metal pipe. In addition, the plastic casing can be replaced if required. It is allowed to deepen the well when dismantling the plastic component. A video of the installation of the casing is below.

Conclusion

As you can see, the choice of material for the casing should be approached very carefully. This will protect the health of your family. In addition, high-quality casing has a positive effect on the life of the well. Wells with good casing are easy to maintain.

When ordering the production of a water well from a drilling company, the owner country house expects to receive a completely ready-to-use source of pure natural water, which can last for decades.

However, it should be remembered that qualitative composition produced water and durability underground well largely depend on the material and workmanship of the pipes that make up the casing string. Therefore, when choosing a drilling contractor, it will be useful to know which well casing is best for use in each specific case.

Casing material selection

This article cannot be considered a complete instruction for installing casing pipes, because it is quite complicated. technological process, requiring the use special equipment. It is almost impossible to do it yourself at home, so for drilling a well and installing a casing string, it is best to turn to professionals for help, and further installation of pumping equipment can be done on your own.

Here we will try to understand what better pipes for the well to use as casing, and also consider basic properties pipes from various materials.

What is a casing pipe for?

The casing string pipes are lowered into the wellbore of a newly drilled well during its development, thereby protecting its walls from collapse, and the wellbore itself from falling rock from adjacent soil layers.

In addition, in an already finished well, the casing string pipes are tightly connected to each other, which prevents poorly treated groundwater (the so-called perched water) from entering its wellbore. Thus, only natural water deep cleaning from the artesian aquifer.

1. Steel is environmentally friendly pure material, which, in direct contact with water, does not release any chemical elements. Common rust that forms on metal surfaces, does not dissolve in water and, contrary to popular belief, does not increase iron levels. To remove it, it is enough to pass water through a regular household filter.
2. The high mechanical strength and toughness of the steel practically excludes the breakage or destruction of the casing string during its installation.

1. In case of clogging or silting of the well, as well as accidental ingress of foreign objects in it, it is allowed to perform additional drilling or other work using a drilling tool.
2. A well with such a casing can be installed even at a very deep level of the aquifer.

As for the negative qualities of this material, the main disadvantage is its rather high price. For this reason, you should carefully consider for what period of operation the installation of the well is calculated. The use of a steel casing in most cases is justified for deep artesian wells installed on the site of a capital house for permanent residence. For arrangement shallow wells for seasonal sand, it is better to use cheaper materials.

Advice! A seamless seamless pipe is of better quality, since the weld along the entire length is its weakest point, in which, when high loads cracks and breaks may occur.

Stainless Steel or Coated Pipe

As for the use of metal elements with additional corrosion protection, sometimes a controversial question arises: which pipes are better for a water well, galvanized or stainless steel?

In fact, answering it, you can ask a counter question: is it worth overpaying a significant amount for stainless steel, if an ordinary pipe made of black metal has a service life equal to the period of operation of the highest production well.

Separately, it should be said about galvanized black metal. The fact is that with prolonged exposure to water on zinc coated over time, zinc oxide is formed, which is considered hazardous to human health. For this reason, galvanized elements can only be used for service water.

Steel pipes with enamel coating fully comply with sanitary and hygienic standards, however, they have one significant drawback. The enamel coating has a low modulus of elasticity, so it is quite fragile. As a result, during the installation of the casing on the enamelled surface, a large number of chips and microcracks.

Water gets into them and the process of destruction begins, and through corrosion occurs even faster, because the thickness of the metal for enameled pipes is used less than for black metal.

Note! If the manager of a drilling company strongly recommends the use of any stainless materials that have a significant cost, this is more like a marketing ploy in order to sell the client a more expensive product.

Asbestos cement pipe

Asbestos-cement pipes have been used for well casing for many years and are an inexpensive alternative to steel products, but not all drilling companies, due to the nature of this material, are able to mount them correctly.

1. Asbestos cement is environmentally friendly chemically neutral natural material and during operation does not emit any harmful substances into the water.
2. The claim that asbestos is carcinogenic is scientifically unfounded. In addition, the number of fibers that can get into the water is negligible, and given the peculiarities of their structure, they can be filtered out by any household filter.
3. Asbestos cement products are very fragile, so special care must be taken when installing them. For the same reason, it is unacceptable to perform drilling operations in an already finished well.
4. Due to the large wall thickness, the installation of asbestos-cement pipes requires a borehole of a larger diameter than steel pipes.
5. They cannot be used as a filtration column in sand wells, therefore they are used only in artesian sources.
6. Due to the physical features of this material, their installation is allowed only in wells whose depth does not exceed 100 m.

plastic pipe

Relatively new materials for casing can be considered pipes made of various polymers: uPVC (unplasticized polyvinyl chloride); HDPE (low pressure polyethylene) and PP (polypropylene). Among the advantages of these materials, the following properties can be noted:

1. Absolutely not subject to corrosion even with prolonged contact with water.
2. They do not break down in the soil and do not contribute to the development of pathogens.
3. They do not emit any harmful substances into the water.
4. The main advantage of plastic products is their low cost and light weight.

Given the low strength of polymer products, the maximum depth of the well with their use should not exceed 60 meters.

Advice! As for the question,which pipe is better for a well, of plastic products, the most optimal in terms of price and reliability is the nPVC polymer.

Conclusion

After reading the material in this article, you can more confidently seek help in installing a well from the specialists of a drilling company. A competent manager who sees that the client is at least a little versed in this issue will not frankly offer him a product of inadequate quality.

More detailed information on the issue of interest can be obtained by watching the video in this article or reading other materials in this section.

Autonomous water supply in a private house is a necessary component comfortable living, especially in areas remote from centralized water supply systems. The implementation of this task requires the solution of many different questions, one of them: which pipes are better for a well?

To reach the aquifer, a rather laborious operation is carried out - drilling a well. Pipes help protect the walls of the well from collapse and keep the water clean. The first task is performed by casing pipes, and the second - by production pipes. However, manufacturers strive to minimize the cost of work, so modern pipes can perform both of these tasks at the same time.

It is worth noting that professional drilling companies, when asked which pipe to choose for a well, give completely different advice, focusing not so much on the situation of their potential client, but on their own preferences, skills and capabilities. Therefore, before calling a company that provides this kind of service, you need to find out what pipes are and in what situations they are recommended to be used by professional builders.

General points to be considered

The market offers a variety of pipes made of three types of material:

• become;
• asbestos cement;
• plastic.

But among them it is difficult to find a universal option that is suitable for any well.

The conditions in which drilling will be carried out vary, so for each specific situation, you need to look for best option. When choosing which pipe to use for a well, a number of factors should be taken into account:

• drilling depth;
• drilling technology;
• well diameter;
• soil structure.

The fact is that the soil is heterogeneous and has some mobility, so the casing pipes experience significant loads from the outside and inside. That is why it is very important to decide from which aquifer it is supposed to extract water. The possibility of penetration into the pipe should also be assessed. Wastewater and the level of the upstream aquifers.

Tip: The easiest way to find out the condition of the soil, as well as the depth and location of the aquifer, is to find out how the neighbors solved a similar problem. To do this, it is enough to find an existing well, which is located as close as possible to the site.

Steel option: reliable and expensive

Steel pipes have a well-deserved reputation as the most reliable designs for wells. A durable six-millimeter pipe easily withstands almost any load, keeps the water clean and faithfully serves its owners for fifty years. a well with such casing pipe can be easily cleaned without worrying about possible damage. This is a very suitable pipe for a borehole pump.

For deep drilling and in difficult soils, it is recommended to use reliable steel pipes

In addition to the traditional steel pipe, there are varieties on the market:

• enamelled;
• galvanized;
• from stainless steel.

Unfortunately, it is almost impossible to install enameled structures without chips, and damage to the enamel leads to fairly rapid corrosion. Some experts believe that the use of galvanized metal in prolonged contact with water can cause very hazardous zinc oxide contamination.

Main disadvantage steel structures- very high price. Therefore, manufacturers are constantly looking for alternatives to expensive steel.

Please note: If black steel structures are used, rust particles may appear in the water over time. The problem is easily solved using a regular household filter.

Asbestos-cement pipes: inexpensive, but fragile

Asbestos cement is chemically neutral, amazingly resistant to corrosion and has no restrictions on the service life.

Pipes made of this material will cost much less than steel. They would have driven everything out of the market long ago. metal constructions, if not for one drawback: it is a rather fragile material.

Asbestos-cement pipes are a classic. They are great for use in wells and wells

As a result, to ensure sufficient strength, asbestos-cement pipes are made with very thick walls, for which a larger diameter hole must be drilled. In addition, work with asbestos cement should be done very carefully, but not all installers have a high enough professional level for this.

Advantages and disadvantages of the plastic version

There are three types of plastic pipes for wells on the market:

• from unplasticized polyvinyl chloride (nPVC);
• from low pressure polyethylene (HDPE);

made of polypropylene (PP).

Inexpensive plastic pipes are an excellent choice for shallow wells. But make sure they are for drinking water!

All these materials have a number of remarkable performance characteristics:

• safe for health;
• resistant to corrosion;
• provide a tight connection;
• are light in weight.

All this makes plastic pipes very convenient for transportation and installation.

Unfortunately, they do not differ in particular strength, so a well made of plastic pipes can be created with a drilling depth of no more than 60 meters. Production plastic pipes are widely used in steel casing strings.

Thus, the owners of plots in which the aquifer is shallow, about 50 meters from the surface, have more possibilities for selection. However, for deep drilling and on difficult soils, preference should be given to expensive, but strong and reliable steel.