Detachable direct connection American. Threaded pipe connection - American, their types by assembly type

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, an American is considered.

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.

Plumbing assembly is considered to be of high quality if all connections are sufficiently tight. In practice, this is achieved through the use of various fittings, nuts, gaskets and other connecting elements used in plumbing work. Such elements are quite suitable for effective use, but at the same time, there is a much better solution in the form of a universal nut, known as the "American".

Let's figure out what "American" is and why it has gained such great popularity.

The American plug connection is a kind of nut that finds its application when it becomes necessary to connect two pipes. Previously, spurs were used for this, which are still found today, since their cost is significantly lower compared to the connection of the type in question.

The use of "American women" in plumbing makes it possible to simplify the process of connecting two fixed pipes as much as possible. For example, you need to connect a faucet and soldered wiring. Both in the first and in the second case, the pipes cannot be twisted, and, possibly, the thread is located close to the wall, which excludes the use of the same corner. It is in such situations that the "American" comes to the rescue, providing a connection due to the rotation of the nut, which is part of its design:

• two fittings;
• pad;
• hex nut.

Pipe connection options

The connection of the "American" type is provided due to a certain variability of the connection to the pipe, which involves the use of:

Types of threaded connections

The thread of the "American" can be conical or cylindrical. A similar variability is present in the case of fittings, the connecting surfaces of which differ in the mentioned shapes.

As for the conical seal, it has a certain set of advantages:

• ensuring the tightness of the connection without any gaskets, FUM tape, flax fiber, etc.;
• resistance to various kinds of influences, for example, temperature extremes, which is achieved due to the homogeneity of the material in terms of its chemical composition and physical characteristics;
• preservation of tightness with deviations of the axes of the connected parts up to 5 degrees.

The mentioned advantages in relation to the conical elements of the "American" are achieved due to the high precision of their manufacture, which can be neglected to a certain extent when it comes to flat seals. Here, the use of a gasket in the form of a ring is sufficient to achieve the required tightness even when the surface of the connecting elements is not distinguished by high-precision processing.

In the production of "American women" steel of various grades is used. Although AISI steel under the numerical designations 304, 316 and 321 is more popular. Steel marking also includes an indication of conditional pressure (PSI) and size in inches.

Gusset

For the convenience of organizing turns, an "American" is produced, providing a corner connection. Usually this is in demand when there is no possibility of arranging piping. At the same time, it is possible to save money, since in this case one less connection is established.

Coupling

A coupling is a fitting that provides a connection between pipes or makes it possible to organize a transition from a pipe of one diameter to a pipe of another diameter. The “American” is identical in functionality to a standard coupling, one part of which is screwed, soldered or welded to the pipe, and the other provides for the installation of a collapsible connection.

Crane "American"

Ball valves are the most popular elements of shut-off valves, of course, provided that they are manufactured in accordance with the required level of quality. There is a huge mass of these products, among which there are taps oriented, for example, to some special use or performing decorative functions. At the same time, there is also an “American”, supplemented by a ball valve.

Many people know that this type of crane exists, but only a few have used it in practice. This state of affairs is due to simple ignorance of all the advantages of this product. Meanwhile, with its help, you can replace such an element of plumbing as a squeegee - a part for connecting two pipes, where a long thread is applied on one side, and a short one on the other, which is complemented by a coupling and a lock nut. In the proposed version, everything is much simpler, since it provides for the tightening of the crane and the element in the form of the “American” itself due to the slight use of the wrench. These two parts are self-centering, which facilitates the process of their installation.

Often, the "American" faucet is used when installing heating radiators, which leads to some positive aspects. The connection of these connecting elements makes it easy to dismantle the radiator, and the presence of a tap makes it possible to regulate the water supply, which allows you to influence the temperature in the room.

Like all types of ball valves, the "American" is equipped with two types of handles, where one should be understood as a butterfly, and under the other - a lever. In the first case, these are cranes with a small section, characterized by the absence of the need to apply too much force to turn, and in the second case, cranes with a large section, the operation of which is associated with the application of a greater force.

Assembly

The “Americana” union nut is tightened with a standard open-end wrench or a union version of this type of tool is used. Some try to use a spanner, which is not recommended as it may damage the nickel plating. If there is a decorative coating on the nut, rubber or plastic gaskets should be used, and plywood can also be used.

The installation of "American women" on metal-plastic pipes involves the use of a special tool in the form of an internal key. It is necessary for tightening the press fitting during installation. Typically, such a key is in the form of a cylinder, complemented by two recesses that are necessary for the hooks, but a hexagonal version is also available.

Instead of an internal key, an improvised tool, such as pliers, is often used, which increases the likelihood of damaging the product in question. When one-time work of this plan is supposed, that is, it is necessary to install only one connection of the "American" type, then this approach is justified to a certain extent, but in the case of installing several pipes, you should still take care of buying a special tool.

If you have the skills to work with metal, then you can easily make your own cone wrench of the required size. Tapering is necessary to ensure that it enters the existing recesses. Profile fittings can be used as a material for making a key.

For the "American", the diameters of the internal and external threads of which are defined as 1/2, a key is required in accordance with such dimensions as 12 by 12 mm and 10 by 10 mm. The shape of the key should resemble the letter "G", having a handle length of 150 mm.

Materials for the manufacture of "American"

The production process of "American women" is based on the following types of materials:

• cast iron;
• nickel;
• chromium;
• brass, chosen due to the fact that this material is able to withstand high temperatures of the coolant, reaching 120 ° C;
• stainless steel (ISI304, AISI316, AISI321) ;
• combined, including propylene.

Of the above materials, stainless steel is worth mentioning again, as it provides the ability to produce the most durable "American". Although consumers of these products often prefer copies made of chrome, as this material combines quality and practicality. It also does not require the installation of a gasket for "American" chrome to ensure the tightness of the connection.

If pure steel is used for the production of the type of product in question without special treatment, then after a few years such a product will begin to collapse. Galvanized can withstand about 10 years, and stainless - about 20 years.

Conical or flat?

Conical "American", supplemented with a rubber seal, provide tightness due to internal pressure, in this case, the union nut can even be tightened by hand. As for flat sealing options, it will be necessary to provide the necessary contact pressure.

Mandatory tightness of the connection can be provided by both a conical "American" and a flat one. At the same time, flat ones make it easy to change gaskets, which are not in short supply. And for conical ones, special gaskets are needed, which differ in a non-standard size. In turn, conical ones without gaskets should not be chosen, since in order to create a tight connection, it is necessary to tighten the nut very tightly, which is unacceptable if the pipes, for example, are plastic.

Conclusion

As you can see, an American in plumbing is already an indispensable part. That is why it is so widespread.

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.

An American, whose correct name is a union nut, is a connection of pipes using a fitting. She received such an unusual definition in everyday life from plumbers. This is a fitting that is designed and manufactured in the USA and is designed for quick installation and disconnection of structures in water and gas pipeline systems without rotating the pipe.

Such a connection has found wide application in plumbing, because only one union nut is needed to join pipes. They make parts from cast iron, stainless steel, brass with chromium and nickel content, as well as some types of propylene parts and stainless steel.

Ways to install an American

The method of joining pipes, during installation, using a union nut is universal. Such a unit is suitable for polypropylene and steel, cast iron, copper and metal-plastic products. It is used in hard-to-reach, inconvenient places where welding is not possible. The simplest form of this element consists of the following details:

• Threaded fitting;
• Pad;
• Cap nut.

Thanks to the conical surfaces of the parts, as well as the rubber gasket, the fitting has a tight fit.

The union nut has two types of installation:

• conical;
• Threaded.

The conical connection makes it possible to quickly carry out the installation of parts in hard-to-reach places without the use of special tools. In this case, the docking will be tight and reliable.

A threaded connection is used when instant installation or dismantling of pipes is necessary.

Threaded connection is of the following types:

• Detachable with external thread (with its help, polypropylene and steel pipes are installed);
• Detachable with internal thread (also suitable for polypropylene and steel pipes);
• Detachable with union nut.

The detachable connection ensures the straightness of the connected pipe sections. The quick connector is necessary for the fast connector of the pipes. The speed of work lies in the fact that undocking occurs with just a union nut. An important advantage of the American is that the fitting can be disassembled many times during the operation of the pipeline, only the replacement of the seal is needed. This makes it possible to save time and money.

In what cases is it used

With the use of a quick-release nut, American plumbing becomes much stronger and more reliable. When carrying out plumbing work, it is impossible to do without such an installation. With the help of this part, installation and repair work of heating radiators, meters, filters, plumbing, all types of pipes are carried out. It is especially noteworthy that the above work is carried out with just a union nut, which is controlled by a simple open-end or adjustable wrench.

Today, a ball valve has become an indispensable part in plumbing, because it has a very successful design. It is a modern and progressive type of pipeline crane, in which the working element has a spherical (spherical) shape. Such an element is used to pass water, gas, steam.

It is made from steel, cast iron, brass, copper.

An American connection can be:

• Direct;
• Angular.

There are different sizes of crane, depending on the nature of the work. The most popular sizes are 12 and 34.

When installing plumbing equipment, the faucet replaces the previously used conventional shackle, which consists of a long thread, a coupling, a lock nut and a counter thread.

Plumbers had to make a lot of work during the work. Now it is only necessary with a few turns of the key to pull off two self-centering parts - a crane and an American.

The ball valve is widely used in the installation of the heating system. The radiator, mounted through a faucet, is easy and simple to remove, plus the water supply can be adjusted manually. It has two types of handles:

• Butterfly;
• Lever arm.

The butterfly is mounted on nodes of small section, and the lever on nodes of large section.

Today, plumbing offers customers a wide range of exquisite products - from retro to stylish avant-garde. Global manufacturers put all their skills to meet customer needs at an affordable price. In order for such plumbing to serve for many years and please the eye, it is necessary to use such a detail as an American for faucets and sinks.

The American connection is the best, most reliable and versatile way, which is indispensable when carrying out plumbing work.

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: