The connection is American internal. Features of the use of a union nut in plumbing

Company " Center Metal» manufactures specialized threaded fittings for connecting pipelines without welding. All connections are detachable and quickly assembled. 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:

1. cone seal- scope: pipelines of the chemical and oil refining industries, pressure up to 25 MPa;
2. seal with gasket(poranit) is used to connect water and gas pipes (American plumbing), working pressure up to 16 MPa;
3. 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.

American plumbers call a ready-made quick-release element for connecting 2 pipes.

For these purposes, a clutch with a drive was previously widely used.

A coupling is a piece of pipe with an internal thread or a wide nut. The coupling is used both for connecting pipes of the same diameter, and two pipes of different sizes. In the first case, it is called a coupling, in the second - a transitional one.

When mounting and adjusting the connection, it is often necessary to supplement the coupling with a drive. Squeegee is a piece of pipe with external threads at both ends.

Device

By its design, an American is a combined coupling, a collapsible part, consisting of 2 threaded fittings and a union nut.

The American is flat, in this case the tightness of the connection is achieved by a gasket. It is the cheapest and most compact.

During operation, it may be necessary to tighten the nut and replace the used gasket. For these reasons, it is better not to make connections with a gasket hidden.

Another option is a cone American.

Here, a gasket is not required, since the polished parts of the fittings, made like a cone, are tightly pressed against each other when the nut is tightened.

The deviation along the axis of the mounted pipes should not exceed 5 degrees. They should be carefully checked for hidden defects, as they are usually used in the most important connections.

Expert advice: for critical connections operating in conditions of temperature differences: water heaters, heated towel rails, use an American cone, it is more expensive, but more reliable.

American is a universal and convenient device on a single nut.

To connect pipes, simply tighten the union nut. Quick and convenient installation with the help of an American has replaced traditional couplings and shackles.

With the help of American women, the transition to a pipe of a different diameter or from a different material is decided. With an American, you can create a corner connection.

The convenience of an American type connection has led some manufacturers of plumbing equipment to use it as a mounting element in the design of branded taps, meters, filters, etc.

The American is produced from the following materials:

The last option is a combination of polypropylene with stainless steel, it is often used when installing plastic risers.

Depending on the thread, external or internal, there are three types of American women:

• coupling-thread;
• coupling-coupling;
• carving-carving.

There are also options without thread, for welding connection.

Choosing the right part allows you to get by with one connecting node without additional elements during installation.

Detachable connection type American is available for all running sizes of pipes.

In practice, most often you have to deal with the sizes 1/2 inch and 3/4 inch.

Advantages

Connecting Assembly

To tighten the union nut of American women, a conventional open-end or adjustable wrench is used.

A wrench should not be used as it may damage the nickel plating.

If the nut has a decorative finish, use washers. Suitable pieces of plywood, plastic or rubber can act in this role.

When installing metal-plastic pipes, you will have to use a special tool - an internal key. With it, the press fitting is twisted during installation. The most common form is a cylinder with two notches for hooks, sometimes a hexagon.

Often, pliers or other handy tools are used instead of a key. However, there is a risk of damaging the product. If you plan to install several pipes, it is better to purchase an internal key for American women.

Those who know how to work with metal can make a homemade cone key to the required size.

The taper is necessary for an accurate hit in the recesses.

For an American 1/2, the corresponding key sizes are 12x12 mm and 10x10 mm. The shape of the key is L-shaped, the length of the handle is approximately 150 mm.

They make similar homemade products from unnecessary pieces of profile reinforcement.

Watch the video, which explains in detail the device and features of the use of an American woman in plumbing:

In any plumbing work, the main indicator is the provision of a hermetic connection. For this, devices such as a fitting, nut, gasket, clamp can be used. But the most high-quality and effective means for a tight connection is American plumbing.

What is it? It is a special nut designed to connect pipes to each other.

An American is a kind of connection of parts in plumbing, invented in America, hence the name. Later, an American coupling and crane were developed.

Types of threaded connections and what an American connection is made of

The thread on an American can be conical or cylindrical. There may also be a difference in the types of fittings. The surface of the fitting can be conical or flat.

Benefits of a conical seal:

To achieve these advantages, precision in the manufacture of fittings is required. In a flat seal situation, this can be slightly neglected. Here they use a flat Teflon gasket-ring.

An American nut can be used more than once, only replacing the old gasket will be enough, which can help protect yourself from buying new plumbing.

For the manufacture of connections, stainless steel, brass, chromium, nickel, cast iron, a combination of metals can be used. The use of these materials can be separately and in an alloy. The most durable will be the design, made with stainless steel elements. However, experts prefer chrome parts, as an American from this material is characterized by a high level of quality and plasticity. In addition, the reinforced structure does not require the use of a gasket.

Metal and polypropylene in the design will provide high tightness.

The American connection can be made using a variety of stainless steel grades. These are mainly brands such as AISI304, AISI316, AISI321.

The marking includes dimensions (unit inch), steel grade and conditional pressure in PSI.

The outer coating of the American is nickel galvanized, which protects it from corrosive formations and helps to increase the resistance to mechanical wear. This coating is also a decorative finish.

Coupling american

A coupling is a type of fitting used when connecting two pipes or when transferring a pipe with one diameter to a pipe with another.

An American coupling is the same coupling, on one side it is tightly screwed or welded, and on the other it is a collapsible American connection.

Crane American

At the moment, the most successful and common element of valves is a ball valve. There is a wide variety of types of ball valve, for example, decorative, special, having internal and external threads on one side only, American ball valve, etc.

In general, an American faucet allows you to solve one important problem when installing plumbing, it is a replacement for a standard plumbing fixture, which consists of such elements as a long thread, a coupling, a lock nut, a plumb thread. It helps to simplify the task and with a few turns of the wrench to pull off the crane itself and its American.

Also, an American crane is used for the installation of heating radiators. The battery, attached on both sides by an American tap, becomes easily removable. Another plus here is that the water supply can be adjusted by hand, and as a result, the temperature of the heating radiator during operation.

Compared to plastic faucets, the American faucet is able to withstand higher operating temperatures, but they are not designed for extreme temperatures.

The working medium of an American can be hot and cold water, as well as a liquid non-aggressive medium transported through a process pipeline. The operating temperature should not be higher than +120 degrees Celsius.

An American corner is simply a necessary element so that you don’t have to pile up a lot of connections.

Like any ball valve, an American crane differs in the type of handle:

The butterfly is placed, as a rule, on cranes with a small section, since such cranes require little effort when turning. And the handle-lever is used for taps with a large section, where more effort is required to turn.

In any plumbing work, a reliable connection is the most important indicator. Ensuring water tightness is very important. For this, various nuts, fittings, gaskets, etc. are used. However, according to statistics, the tool that creates the highest quality and most effective tightness of the connection is American plumbing.

The structure and size of plumbing "American"

By design, an American is classified as a coupling with a union nut. With this element, a direct connection is created, and this simplifies many installation work.

The standard American kit includes a union nut, gasket, pressure fitting and nipple.

When choosing, you need to pay attention to the model, each model has its own parameters. The nut in diameter can be from twenty to sixty millimeters.

Mounting

As mentioned above, an American allows you to create a high-quality and convenient threaded connection quite simply. So, you can do the work of replacing the plumbing element yourself.

An American with an internal thread is used to connect pipes with the same diameter. At the ends of each pipe, seven turns are cut using a special cutting tool (die). Further, there may be several options for connections.

Before directly twisting the American at the end of the pipe, a sealant is placed there clockwise. The first turns should be left without a seal for easy putting on an American. The American is screwed onto the seal with a key. The material can be sealed with improvised means, for example, energy flex, flax, polypropylene tape, etc. The second end of the pipe, after the thread is twisted, is sealed and the second part of the American is wound onto it. So the two pipes are connected.

American mounting tool

When installing a structure using an American, they use wrench. He is the best for this job.

American is a universal connection, without it it is almost impossible to carry out installation work. It is used in the connections of the metering device and fittings to the pipeline of the hot and cold water supply system, in plumbing with threaded couplings, as well as for polypropylene pipes.

Currently, the American is being produced as a separate element or as an addition to certain types of fittings for the pipeline.

Another connection option is:

• thread is cut;
• winding the seal;
• a long thread is wound on the second end of the pipe;
• a lock nut is screwed onto a long thread, then an American;
• a second pipe is installed;
• two parts of an American are connected;
• winding the seal;
• the locknut is tightened close to the American.

Approximately the same principle of connection using an American with an external thread.

The American is installed on the pipeline in a place accessible for inspection in any position, the direction of the liquid does not affect the installation.

In plumbing, an American is always used for such work as replacing a heating radiator, installing a meter for hot and cold water, installing shutoff valves, connecting individual sections of pipes, installing deep filters. This makes the design very convenient for further maintenance.

The quick-release threaded American is available with a flat or conical connection of structural parts. Usually, the simplest American consists of four parts: two threaded fittings, a gasket (but not always) and a union nut.
Tightness between fittings occurs due to the conical surfaces of the edges of the parts and a rubber gasket, or for flat ones - only a gasket, for example, paronite.

Americans are designed for convenient quick connection or disconnection of pipes and various shut-off and control elements of heating and plumbing systems in the house. Connection (connector) of pipelines is carried out due to only one union nut. Please note that the American plug connection in plumbing is designed for repeated use with the replacement, if necessary, of the “squeezed out” gasket and has an undeniable advantage over the usual squeegee with a coupling and a lock nut.
Such connections come with a socket threaded connection (Photo 1)

or for soldering polypropylene pipes (Photo 4).

Americans for plumbing are made from different materials: cast iron (Photo 3),

brass plated with chrome or nickel (and without),

stainless steel and combined, with individual polypropylene parts. They can be bought in the distribution network of various sizes (diameters) and designs (straight, angular (Photo 2),

designed for different pressures of the medium in the pipeline.

Widespread cranes with an American.

By design, an American ball valve can be straight or angled and is designed to work in a system of cold and hot non-aggressive environments.

Available in bore sizes 15 (1/2″), 20 (3/4″) … and up to 50 (2″). The temperature limit for a plastic tap is plus 90 degrees. And a ball valve with an American made of brass, for example, Bugatti (Bugatti) can withstand temperature conditions, according to the manufacturer, from minus 20 to plus 120 degrees.

In order to install or dismantle plug-in connections, you need a wrench for American women. In plumbing practice, more often you have to deal with American women 1/2 ″ and 3/4 ″, with two internal protrusions, less often for a hexagon. I make such a “L” shaped double-sided key myself, from cutting construction profile 14 fittings, using the method of heating and flattening to a square. Then I give a small conical shape and harden. It is made under a cone because different manufacturers have slightly different sizes of internal protrusions.

The universal mutual “L” shaped key for American women has the following approximate dimensions (diagram in Fig 1):

handle length 150 mm;
edge under 1/2 "- A \u003d 12, B \u003d 10, C \u003d 32;
edge under 3/4″ - A = 16, B = 13, C = 35

Such a homemade key is also suitable for detachable connections for a hexagon.

Tip: if you only need to work with one or two ... 1/2 ″ metal American women, you can use ordinary pliers, which will work quite well as a key (Photo 5).

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:

1. Direct. Used for joining straight sections of pipes.
2. 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.