Plumbing American. Using an American connection in plumbing

Menu:

An American with an internal or external thread is used by all experienced pipeliners. With this prefabricated quick-release pipe fitting, two risers can be securely connected.

The design is a collapsible combined coupling, the structure of which provides for the presence of 2 and a union nut.

American women types

The versatility of the device lies in the fact that the device is connected to the pipeline system with just one union nut.

Classification by purpose

According to the functional purpose and design, an American-type threaded connection can be:

flat. This option is quite compact. The tightness of the connecting part is provided by a gasket. Over time, it is necessary to regularly tighten the nut, if necessary, change the used gasket. Given this fact, it is desirable to mount this type of connection in places with good access to it;
conical. It is not equipped with a gasket, since the conical structures are highly polished, and when mounted they fit very tightly to each other.

Important! It is necessary to ensure that the deviation of the pipes along the axes does not exceed 5⁰. Otherwise, the bond may not be airtight.

Since the reinforcement part is used at very important joints of pipeline elements, it must be carefully checked for possible hidden defects.

Important! The conical type of product is considered more reliable. Therefore, with its help, they connect parts that must function flawlessly in conditions of sharp temperature changes.

Fastening using the design is increasingly being used in the laying of pipelines, pushing into the background the squeegee-coupling device with a lock nut.

Types of threads respectively

If we classify products by thread, then we can distinguish 3 types of connecting structures:

"mom-folder";
"mother-mother";
"folder-folder".

Advantages

The fastening structure is different:

reliability;
fast, easy assembly and dismantling. By turning only the union nut, in a matter of seconds, the joint can be mounted without any rotation of the risers. This fastening cannot be compared with a squeegee-coupling type connection, for the implementation of which many different parts, tools, materials are required;
the ability to create straight and angular joints;
compactness;
reusability, since the assembly-disassembly process can be carried out more than once, which does not affect the quality of subsequent fastenings.

The last two conditions entail significant cost savings, which is of great importance to most citizens.

In addition, due to the ease of installation, most manufacturers of plumbing equipment began to design branded faucets, meters, filters in combination with a fastening structure.

The versatility of the device lies in the fact that with different combinations of fitting connections, American straight and angular types are assembled to each other, designed for fastening pipes of various diameters. More often than others in such cases, GOST 8959-75 is used.

The use of cone-type devices makes it possible to ensure high tightness of metal-to-metal joints without using gaskets. This know-how helps to increase the service life of the parts.

disadvantages

Probably the only "minus" of this is its high price. It is this factor that can cause the choice of a different type of fastening of the risers to each other. Although, it is also characterized by a high cost. So the choice is yours.

About connector assembly

Those who have not dealt with this connecting structure are often asked how to twist an American. Let's say right away that there is nothing complicated, you just need to have some information about the structure of the fastening unit and have elementary skills in working with keys.

So, to tighten the union nut, you can use an adjustable or regular open-end wrench.

Important! When installing the connection, do not use a gas (pipe) wrench, as the chrome or nickel coating may be damaged.

Important! When using union nuts with a decorative coating, turnkey plywood or plastic gaskets must be used. Otherwise, you run the risk of being left without decoration on the union nut.

If you need to fasten the metal-layer using the device, you need to use the internal key. Its cross section is a hexagon, it can also be in the form of a cylinder with two notches (engages). Used for mounting press fittings.

Internal key

When this device is not available, they use pliers, other improvised parts or tools. But the key still needs to be purchased if you are going to mount not one connection, but the whole system ().

Anyone with metal on “you” can make a key for a cone of the required size. The cone-shaped end of the tool is necessary in order to accurately get into the recessed hooks. The key is L-shaped with a handle length of about 150-160 mm. For its manufacture, profile fittings (trimmings) are used.

Mounting algorithm

Using an element of pipe fittings, it is quite easy to connect.

In order for the joint to be of high quality and last for many years, it is recommended to adhere to the following algorithm:

Make a drawing of the future pipeline, on which mark the locations of the connections, apply the distances between them.
Prepare pipes. That is, you need to cut them into the necessary pieces, chamfer.
Carry out calibration (editing) of the ends of the risers. This technological process is necessary in order to ensure high-quality pipe joints.
Install a fitting on the end of the pipe, tighten the fitting not very much, correct the correct installation of the part, and eliminate possible problems. If there are no distortions, and it is visually visible that the device is placed correctly, tighten the union nut.

Important! Try to tighten the union nut as tightly as possible to ensure that there are no leaks.

Those who work with the structure for the first time, and before that, for example, dealt with galvanized threaded fittings, may have doubts about the tightness of the fastening. To be sure, they wind the FUM tape under the thread or, although this is not necessary. The connection reliably seals the joints. Whoever connects the pipes at least once with the help of an American will use it all the time.

About Applications

The American fitting, like the polypropylene pipe itself, is used for the installation of various kinds of main pipelines.

It is used when laying:

heating systems;
plumbing for hot and cold water;
gas pipelines;
sewer systems, including magnaplast plastic sewerage, other pipelines.

American - the most common, convenient, reliable, in some cases an indispensable fastener.

When mounting a water meter at home, one cannot do without such a reliable part, since the “input” and “output” can be perfectly done only with the help of this fitting.

Important! The ease of use of the connection can be seen when dismantling the water meter for inspection or repair, since the fixture can be easily unscrewed.

When installing heating radiators, this fastening device cannot be dispensed with. In some situations, the fixture is the main node of the heat or water supply system.

When repairing radiators of a heating system, the use of a fitting significantly reduces repair time and simplifies system assembly.

The device is able to function efficiently in conditions of high pressures, sudden changes in temperature.

Due to the presence of various modifications of connecting devices, it is possible to quickly and easily fasten plastic and metal-plastic structures, metal and plastic products, plastic risers.

Using an American, you can mount almost any connection of pipeline elements.

In many cases, even those with a flange connection are successfully mounted. To do this, a thread is welded to the flange, after which they continue to connect the elements of the system with the help of an American. This is also what makes this truly versatile piece of pipe fittings unique.

The design fits perfectly with steel welded tees, steel bends, spurs, couplings, taps, steel pipes, and other parts of pipelines.

These and other elements of pipelines are used for laying risers in bathrooms, kitchens, country houses, and other buildings. The reliability of the connection with the help of an American makes it possible to install special bathroom furniture in the bathroom, since the possibility of direct contact with water is excluded.

A novice plumber or a simple layman can mount the fastening of risers using an American. It's all about the simplicity, and at the same time, the versatility of the connecting structure.

Correct high-quality pipe connection is a guarantee of trouble-free operation of the pipeline system. It is at the junction of pipes that accidents most often occur. When replacing parts of pipelines, it often becomes necessary to connect pipes made of different materials. In these cases, the use of an American can guarantee the tightness of the joint.

This connection is universal and reliable, it is successfully used even in cases where the axes of the pipes relative to each other have a slight deviation.

For the construction of networks, pipes made of cast iron, ceramics, asbestos cement, plastic, and steel are used. The performance characteristics of the materials are different, respectively, the methods of their connection also differ.

The correct choice of the docking method makes it possible to avoid emergency situations during the operation of the pipeline.

The technology for performing the work is chosen based on the material for the manufacture of the pipe and other elements of the system - angles, bends, couplings, etc.

Monolithic one-piece connections are distinguished by structural strength and the complexity of dismantling.

If, when replacing a pipeline, it is required, for example, to make an insert from a polyethylene pipe into a cast-iron drainage system, couplings and adapters help to solve this problem, they can also be used to join pipes of different diameters.

One of the options for a detachable connection, which is quickly disassembled and assembled, serves to connect pipes of different diameters or different materials, is considered an American.

What is an American

An American is called a connection element, which is a detachable nut equipped with a thread for joining two pipes. The American design includes two fittings, a gasket, and a union nut.

In other words, an American can be called a threaded coupling, although today there are many types of products.

Any faucet is considered American if it has a threaded thread on one side and a union nut on the other.

Company " Center Metal» manufactures specialized threaded fittings for connecting pipelines without welding. All connections are detachable and quickly mounted. Such threaded fittings allow you to connect pipeline elements without welding. They are used in explosive and aggressive environments where welding is prohibited or technically impossible. Our American connections simplify the installation of pipelines in hard-to-reach places.

Compound production American Du 15–100(American connection). From steel, stainless steel 09G2S, 40X, 0812X18H10T, AISI 304, with various threads: conical NPT, metric M, inch G, for welding, etc.

The production of corner joints DN 15–100 has been launched. Corner Americans change the direction of the pipeline by 90 degrees. Corner detachable connections are available in two types: with external and internal threads. We are preparing to launch a series of parts with nickel and galvanized coating.

Nipples in accordance with GOST 8967-75, (GOST 8958-75, 24502-80, 13956-74), fittings made of steel, black and galvanized DN 15–300, materials st20–45, 09G2S, 40X, 12X18H10T and other steel grades at the request of the customer. Production of a fitting according to drawings and sketches, in accordance with GOST, OST and TU (transitional couplings, elongated spurs and threads).

Connection americanconsists of:

union nut (American coupling);
clamping fitting;
nipple;
gaskets (supplied as an option).

Development, production and testing threaded connections with pressure up to 120 atmospheres and above. Production american women: welded, threaded, transitional, coupling-coupling, welded from steel 12X18H10T, 08X18H10, 09G2S, 40X, 20X13, st. 20..45, brass LS 59 with conical and inch threads, with metric fine and coarse pitch threads, with NPT, BSP threads.

Production and design of non-standard connections (piping) for gas and powder fire extinguishing systems.

The production of seamless high-pressure connecting threads has been established for joining various fire pipes (diameter 22x3.5, 30x3, 38x3, 45x3, 57x3.5). We assemble high-pressure pipelines for fire extinguishing systems according to schemes with various threaded connections (taper thread, inch thread).

Detachable connections for pipelines (American) are produced with various seals:

cone seal- scope: pipelines of the chemical and oil refining industries, pressure up to 25 MPa;
seal with gasket(poranit) is used to connect water and gas pipes (American plumbing), working pressure up to 16 MPa;
ball seal in accordance with GOST 24487-80, it is used to connect hydraulic pipelines, pressure up to 56 MPa.

You can buy an American connection by sending a request by e-mail or by calling:

Our American women are used for pipeline connections as quick connectors. BRS (quick couplings) when connecting pipelines with water or gas, a mechanical seal is used, for aggressive media such as petroleum products, superheated steam, alkali, etc., a ball or conical seal is used. American connection for pneumatics and hydraulics of small diameters (DN6, DN8, DN10, G1/8, G3/8, G1/4) with a cone seal made of 08x18n10, 12x18n10t, zinc coated 12x1mf.

Developed and launched into a series of connections for gas pipelines. Detachable connection is made of several types: for welding and with threaded ends. This product is available in two types: angular and straight GOST 8959-75. You can buy an American by sending an application by mail.

When carrying out any plumbing work, we are often faced with the need to connect various pipelines to each other. To perform such operations, many connecting elements have been invented, the most famous of which is the drive. However, this type of connection is far from ideal, and working with it is very laborious. It is much more convenient and faster to work with such a type of connection as an American, because it provides for almost everything to ensure the reliability and tightness of products. Therefore, let's talk about an American tap: what it is, what parts it consists of, where it is used, how it is used correctly.

Let's find out what an American in plumbing is, and on what principle it works.

An American is a connecting element designed for quick and convenient joining of pipelines from various materials with an internal or external thread. The product is structurally composed of the following components:

quick-release hex nut with thread;
2 fittings, also threaded;
rubber, polyurethane or paronite gasket (in some models, in particular, in conical ones, it may not be).

In fact, this is a coupling that has a shoulder and a union nut that abuts against this shoulder. Coupling connection of pipes American allows you to connect two pipe sections by turning just one nut. Similarly, a connection can be disassembled.

Connectors are available in stainless steel, brass alloys, cast iron, combinations of stainless steel and polypropylene. Products are able to withstand temperatures of the working environment up to +120 degrees. The allowable pressure is usually indicated on the body of the product.

The outer surface of the American has a decorative nickel coating that protects the product from corrosion and mechanical damage, and also has an aesthetic appeal. If you use too coarse tools to work with an American, then scratches may appear on the surface of the product.

Advantages

The installation of the connection is very fast. To do this, simply tighten the union nut;
A detachable connection with an American union nut makes it possible to dismantle it and reuse it for other sections of pipelines. In this case, it is only necessary to replace the gasket, if any;
During installation, it is not necessary to rotate the connected pipes;
High quality connection is provided;
In the event of a clogged pipeline with an American connecting nut, it can be disassembled and the blockage can be eliminated in a very short time.

Application of the American

Detachable connection American is used for many types of installation work. With its help, heating systems, water supply pipelines, flow systems are mounted. The connection is actively used to connect pipes through which non-aggressive liquid substances are transported. Plumbing "American" is installed on steel, and. Recently, combination fittings with union nuts have become very popular, for the manufacture of which a combination of metal and polypropylene is used.

Speaking about the American connection - what it is, it should be noted that this type of connection is not limited to a threaded coupling. The quick-release nut may also have various faucets or air vents. And what is an American crane - what is it and where is it used? It can be any valve, for example, a ball valve. On one side it has a thread for joining with the pipeline, and on the other side there is a union nut. Such a crane can be easily embedded, and just as easily dismantled from the system.

In practice, we constantly deal with mixers that use the American principle. are connected into a single structure precisely with the help of union nuts.

What types are

There are many modifications of the product, differing in the material of manufacture, size, type of thread, type of fastening. For different options for pipelines, a specific type of American is selected.

An American type quick coupling uses 2 types of fasteners:

1. cone mount. The joints of the threaded fittings are made in the form of a cone, so their maximum tightness is ensured even in the absence of a gasket. Such joints are resistant to temperature fluctuations. They are able to provide tightness even in cases where there are small deviations of the axes of the connected pipes (no more than 5 degrees). If it is necessary to install a thermostat for a radiator, then it is advisable to give preference to the conical version. The absence of gaskets allows the product to withstand significant temperature spikes without the threat of leaks.

Tip: Despite the fact that the gasket is not used for the conical connection, it is recommended to wrap the conical surface with several layers of FUM tape. This guarantees the tightness of the joint.

2. Cylindrical (flat) mount. This is a classic American version used for most pipelines. The sealing of the joint is provided by the gasket and screed of the union nut with the pipe.

Note: Some plumbing fixtures use flat washers. Such connections are less reliable, therefore, they may leak. It is not recommended to hide such places in the walls.

An American pipe threaded connection can be of two types:

Direct. Used for joining straight sections of pipes.
Angular. When 2 pipelines converging at right angles are joined, a corner connector is used. It allows you to connect perpendicular pipes.

The correct installation of the American

American plumbing is mounted using adjustable, open-end and universal wrenches. Also, sometimes you may need a special round key, with which American women are twisted from the inside. The use of gas wrenches is not allowed. Excessive force applied to the wrench handles may deform the union nut.

About that, you can learn from a separate article on our website.

When carrying out installation work, it will help you choose the right dimensions of the pipeline.

Other types of connection of plastic and metal pipes.

Consider how the American is installed on the pipe.

An American with an internal thread is installed on two sections of the existing pipeline. If there is no thread on the pipe, then it is cut by means of a die. A sealant is wound on the thread of one section. It can be FUM tape, flax fibers or other materials. After that, one part of the American is wound onto the pipe using a key. Then a sealant is applied to the second threaded section, after which the second American fitting with a nut is screwed onto it. After that, the two sections of the pipeline will be connected to each other by tightening the union nut of the fitting.

Tip: If tow or linen is used as a sealant, then a special sealant paste is applied over the fibers. In extreme cases, you can use engine oil.

The installation of an American with an external thread is carried out in almost the same way. The difference is that the sealant is screwed onto the thread of the American woman herself.

As you can see, the use of American type connecting elements can significantly speed up and simplify the process of installation and possible dismantling of pipelines and other plumbing fixtures.

A coupling is the most widely used plumbing fitting in civil engineering, designed to connect separate parts of a pipeline. A detachable threaded type coupling allows you to assemble a whole branch from individual blanks, consisting of an almost monolithic pipe.

It is not surprising that couplings are now used almost everywhere. We will consider a variety of such products invented in the USA. An American coupling is subject to consideration - designed for pipe assembly. What is so convenient about it and why is it so popular? Now you will know.

Article content

Design Features Differences

The standard threaded coupling is intended for the assembly of pipes and pipelines. The impossibility of creating an efficient water supply or heating system from a single pipe. Yes, it can be bent and connected to other, large branches, but this will significantly complicate the work without providing serious advantages.

It is customary to assemble pipes using fittings. Coupling as a fitting - performs the simplest and most common task - fastens pipes together, forming straight or angled joints.

Threaded couplings are much more common than others, because they made it possible to collect full-fledged branches from individual pipes, but at the same time leave them in a modified state. If the branch needs to be somehow modernized, improved or simply disassembled, it is enough to unwind the coupling.

Problems with standard threaded connections enough. This and:

weak tightness;
high weight, the need to cut the return thread on the desired side of the pipe;
the need to rotate pipes, etc.

The main problem lies in the design of standard type threaded connections. The thread must be unscrewed in order to disassemble it. To do this, you need to rotate either the pipe or the fitting, which adds problems.

American as a coupling - it was conceived just in order to eliminate such shortcomings and give plumbers a convenient detail.

The American turned out to be a truly universal model of plumbing. Its design, unlike a conventional threaded coupling, is completely collapsible and consists of at least three parts.

Two of them are counter threaded ends that are screwed directly into the pipe cavity. They can have an external or internal thread, it all depends on the specific design. The third part is a union nut used to fasten the two previous ones.

The beauty of the whole design is in its conciseness. The detachable system allows you to connect fittings or ends on pipes by rotating a separate nut. No need to twist the pipes, the fitting itself, the body of the coupling. Just connect the parts of the coupling and tighten the nut until it stops.

Rubber gaskets are attached to the inner ends of the coupling parts. They are needed to improve the sealing of the connection.

Advantages and disadvantages

What are the specific advantages of an American type coupling and how it is useful when fastening pipes.

Main advantages:

American is easily installed on any type of pipe;
the ability to form transitions, corner joints, connect taps and any other plumbing;
high level of tightness;
market availability;
good quality and performance;
the idea with a union nut simplifies installation and dismantling;
a large selection of a wide variety of products for every taste and budget.

The advantages are traditionally considered ease of use and tightness. As we noted above, the standard connecting thread on a conventional coupling cannot boast of tightness or ease of installation. The American saves us from such problems when assembling pipes into a single structure.

As for the cons, the only thing that can somehow affect your decision is the price. An American is an order of magnitude more expensive than a conventional threaded coupling. However, compression joints also cost their customers more, so there is nothing unusual here.

Types and differences

How many types of pipes there are in modern plumbing, so many fittings are needed for them.

Any detachable connecting part must meet the pipe in several ways at once. Only in this case it will be fully usable. Such a requirement is quite logical.

One of the most important points here is the material. If, for example, polypropylene is used as a material for pipes, then it is stupid to screw steel fittings to it. Polypropylene is a polymeric material, so polypropylene should be the main mating fitting. The same is true for any metal products.

According to the material, Americans are divided into:

Steel.
Brass.
Copper.
Polypropylene.
Polymer.

A steel split coupling for pipes is the most famous way to assemble them into a single structure. Steel is moderately cheap, very functional and durable. If we forget about its susceptibility to corrosion, there would certainly be no competitors for it.

However, the situation is different. Clean steel without treatment in a few years will begin to show signs of destruction. Galvanized will last a dozen, stainless will probably withstand two, which, however, does not save us from the initial problem.

Sooner or later, the steel fitting will begin to rust and turn sour, then its path is only for remelting.

That is why now they are more willing to buy brass models. Brass is a metal from a special group. With characteristics similar to steel, it does not cause a reaction to moisture or time. Brass fittings, even after 50 years, will be in the same condition as before.

Copper samples are an expensive option for those who have the entire piping system assembled from copper. Copper is superior to steel and brass in every way, except for strength.

Polymer fittings and adapters

Polymers such as polypropylene are increasingly being used to assemble civil water systems.

This assembly is carried out gradually, not everyone has the money, time and desire to completely change the pipes in the house. Obviously, the collapsible system in this case is faced with a problem.

You need to somehow combine different materials with each other. For example, polypropylene and steel.

Polypropylene, as a polymer, does not cause a response in steel, however, it is impossible to simply take and screw a fitting into a steel pipe, the main production material of which was polypropylene. You can't weld them either.

To solve such problems, a detachable variety of American women, called adapters, is used.

An adapter is a fitting consisting of combined materials, intended for assembling pipes from different materials. A detachable American of this type, on the one hand, will be a steel end with a thread cut on it. On the other hand, it is filled with polypropylene.

It turns out a very convenient detail that allows you to assemble the pipes into a single branch without destroying their identity. Each end interacts with its own material, and the tightness is ensured by a gasket system together with a union nut.

An overview of the features of American women (video)

Differences in thread type

American women differ not only in terms of materials, but also in the very principles of design. They also differ in terms of specific solutions. For example, on different American women there may be different types and directions of thread.

There are samples with external threads, with internal threads, with combined components, where the thread for different parts of the American is different. This distribution slightly complicates the process of choosing a fitting for beginners, but greatly simplifies the work of professionals.

Its charm is the ability to choose an option that is ideal for your conditions. It doesn't matter what threads your pipe has and what that pipe is made of, you will find a working solution anyway.

In the event of the loss of one of the components, it will not be difficult to find a replacement for it.