brass fittings in Moscow
Brass fittings represent an extensive group of threaded fittings with a wide range of applications: they can be used in a wide variety of utility systems, in particular in heating and water supply networks. These fittings are compatible with copper, steel and other metal pipes.
Brass fittings can be yellow, without a special coating, or they can be galvanized, with a white metallic color. In assortment our online store for plumbing fixtures You will find both the first and second types of brass fittings.
The use of brass fittings allows you to install water supply or heating networks of the most varied and complex configurations. The plugs, crosses, couplings, nipples, adapters, bends, connections, tees, angles, fittings and fittings presented in this section of our catalog are fittings produced by well-established manufacturers and with certificates of conformity. The use of these fittings allows you to create reliable tight connections pipes between each other and with various water-consuming devices.
Brass fittings are threaded, so two features that are characteristic of them should be noted. Firstly, the connections created on their basis are detachable, that is, the fitting can be reused after dismantling. Secondly, like all threaded connections, pipe connections with brass fittings must be sealed, for which it can be used
In this article we will look at how steel pipes and fittings can be connected.
We will also pay attention to the features of steel as a material for pipelines.
Features of steel pipelines
Like any other material, steel has pros and cons.
Advantages
- available and cheap. They can be bought or simply found in the most remote province; prices for steel pipes without anti-corrosion coating will not seem ruinous even on the most modest budget.
Galvanization, however, is somewhat more expensive. - Steel pipes have no temperature restrictions: if plastics and composite pipes can operate at temperatures no higher than 95 C, then steel will not be afraid of even two hundred.
Note, not because of its own limitations: steel pipes melt at one and a half thousand degrees. At two hundred, the tightness of the connections may be compromised. - Steel pipelines have significant mechanical strength. Didn't you use a gas pipe as a crossbar as a child? The author of the article was guilty of this, and the trumpet did not express his grief in any way.
Flaws
- The main disadvantage of a non-galvanized steel pipe, which puts a heavy cross on it as a material for water supply: it rusts.
All black steel pipes running on cold water need to be replaced. For hot water and heating the picture is not much better.
However, this material is quite suitable as a gas pipe. Galvanization stands apart: it is an exceptionally worthy material.
- Steel pipes overgrow in cold water. The combination of rust and mineral deposits reduces the pipe clearance by half over several years. The problem again does not affect galvanized pipes.
- Steel pipelines are relatively labor-intensive to install. Compare with metal-plastic or polyethylene with its compression fittings.
Please note: galvanization is by far the best, practically no alternative material for connecting a heating main to a private house.
The temperature on the supply pipeline in winter does not allow the use of polymers or metal-polymer pipes here; copper is too easily deformed to be easily laid along the street.
Types of fittings
However, it is not enough to select the material for the pipeline; you also need to install it into a ready-made utility network. How to do this with steel pipes?
The most obvious way is welding. However, it is not always at hand; And not every welder knows how to weld sealed seams. What remains, obviously, are the fittings.
Just so you don’t miss anything: steel fittings for welding also exist in nature. However, let's be realistic: in the presence of welding and a welder, tees and crosses are replaced by welded joints, and actually used elbows and welds with threads can be called fittings only with a very big stretch.
The exception is the oil and gas industry, where compliance with standards, including pipe installation diagrams, is extremely strict.
What is left in the dry residue?
Threaded fittings
Steel pipes and fittings have been connected with threads for centuries. Moreover: the heating risers assembled on galvanized threads and after half a century of operation are in excellent condition.
Tip: for sealing threads, the old-fashioned method is most suitable - flax soaked in drying oil or paint.
It is better to forget about synthetic sealing agents like FUM tape when assembling the water supply system. Even a slight reversal of the thread, which is not uncommon during assembly, will lead to leakage.
Fittings are familiar to everyone and are extremely simple: these are angles, crosses, tees, couplings, locknuts, adapters between different diameters, plugs and fittings, which are made of cast iron, brass (sometimes with chrome plating) and stainless steel.
Threaded fittings for steel pipes mean threads on pipes; They can be cut with hand tools or on a lathe.
The scope of application of threaded fittings is pipelines with a diameter of up to 50 mm.
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The most reliable (primarily in relation to mechanical stress) are threaded fittings made of stainless steel.
Flange fittings
Steel pipes and fittings with a diameter greater than 50 mm are usually connected with flanges.
From the point of view of shapes and functions, they are no different from threaded fittings except for sizes and connection methods: the same tees, crosses and angles (more precisely, bends). They are made of steel and high-strength cast iron (ductile iron).
The simplest flange fitting is a plug
In the real world, however, much more often the required fitting... is simply welded in place from a pipe, and flanges are welded onto its ends.
Why not just weld the pipes together? Because in addition to interconnections, pipes are connected to gate valves, check valves, water and gas meters and a bunch of other fittings.
Compression fittings
Crimping fittings for steel pipes appeared relatively recently and have not yet gained much popularity. To understand the reasons for this, you must first imagine such a fitting.
In general, they are almost identical to compression ones. The union nut, entering the thread, presses the rubber gasket against the fitting and pipe, thereby ensuring the tightness of the connection. By the way, GEBO fittings, for example, are universal - they are suitable for black steel, galvanized steel, and polyethylene.
So, the main problem with such a fitting is that the pipe can be torn out of it. The tightness can be broken by simple mechanical action.
Steel and galvanized pipes are now used precisely where special reliability is needed, including mechanical reliability. There is some dissonance between this requirement and the design of the compression fitting, don’t you think?
In addition, the rubber seal negates another advantage of the steel pipe - temperature resistance. At best, the compression fitting is designed for the same 95 C as polypropylene.
conclusions
And the conclusions are obvious: if you really need wiring made from steel pipes, then:
- Select galvanized pipes;
- Connect them with good old-fashioned threads, using stainless steel threaded fittings and sealing the threads with flax and drying oil.
In this case, the water, gas pipeline or heating system will survive until the wedding of your grandchildren in its original form.
Steel fittings- the most important part in pipeline fittings. Without them, the process of laying and installing the pipeline is impossible.
Steel fittings are installed in those sections of the pipeline where it is necessary to make any branch from it, turn or transition from one pipe diameter to another. As a rule, steel fittings are installed on pipelines with a small diameter (up to DN-100), using a threaded connection or welding. Cast iron fittings are installed exclusively using a threaded connection.
High-quality steel fittings are always available at the warehouses of BK-Armatura LLC.
coupling steel according to GOST 8966-75 - these are steel threaded fittings.
This standard applies to straight steel couplings with and without zinc coating with cylindrical threads. Steel couplings are used for connecting water and gas pipes in heating systems, gas pipelines, cold and hot water supply and other systems operating in non-aggressive environments (water, steam, gas, etc.) at a working environment temperature not exceeding 175 degrees Celsius and pressure Ru- 1.6 MPa.
Lock-nut steel according to GOST 8968-75 - these are steel fittings.
GOST 8968-75 applies to zinc-coated and uncoated steel locknuts with cylindrical threads. Steel locknuts are used in heating systems, water supply, gas supply and other pipeline systems at a working environment temperature not exceeding 175 degrees Celsius and pressure Ru - 1.6 MPa. The steel locknut is made of a steel hexagon, inside of which a cylindrical thread is cut.
Sgony GOST 8969-75 - steel fittings (pipe blanks), intended for direct connection of pipes. This GOST applies to steel and galvanized pipe threads. Used in heating, gas and water supply systems. The temperature of the working environment is not higher than 175 degrees Celsius and the working pressure Ru is 1.6 MPa. They are a piece of pipe, at the ends with pipe threads of different lengths: short and long. Galvanized squeegees are used in places of high humidity.
Threads GOST 3262-75 – these are steel fittings (pipe blanks). This standard applies to galvanized and non-galvanized steel welded pipes with and without cylindrical threads. They are used in water supply and gas pipeline systems, as well as in heating systems. The advantages of threads are ease of installation and low cost of the product. Threads are a short piece of pipe, with pipe threads on one side. The other side is welded. Galvanized threads are used in places where increased corrosion resistance is required.
In order to provide a detachable connection of pipes or to guide the common line during installation, fittings for metal pipes (with threads) are used to replace some components of pipelines. There are many tapered and straight connections on the market today. They are made from various materials with nickel, chrome or zinc coating.
As a rule, threaded connections are used on pipes that have a cross-section of up to 50 millimeters. For large diameter pipes, flange fastenings are used. In terms of functionality and form, they are no different, except that the parameters differ. High-quality cast iron or steel is used for production.
- tees - for connecting pipes of different or the same diameters;
- angles - to change the direction of the pipeline;
- couplings - allow you to connect fixed structures;
- bends - used to deflect the pipeline in a vertical or horizontal position at an angle from 30 to 180 degrees;
- plugs - seal the line;
- nipple - changes the pressure in the system;
- fitting - simplifies cleaning and maintenance of the line.
The above products are made from materials such as cast iron, brass, steel, copper, stainless steel, bronze.
Threaded fasteners
There are metric and pipe threads. The only difference is the thread pitch. If a water supply or heating main is being laid, then it is used pipe or inch thread. In order to connect the pipes of heaters, water heating systems, filters, and meters, pipe threads are also used. In addition, this type of thread is used for cylindrical threaded connections. The thickness of the pipe walls is determined based on the pressure under which the system will be operated.
Used for gearboxes or pressure gauges metric thread. There are external and internal threads. Internal threads are usually found on nuts, and external threads are usually found on fittings.
This video will also be helpful: Pipe diameters: 1/4, 3/8, 1/2, 3/4, etc. Inches and millimeters
Thread parameters
Each device has its own thread diameter. The unit of measurement is millimeter or inch. It is important to note that the cross-section of any metal threaded connection is measured internally. The cross-section of fasteners and pipes made of polypropylene is measured from the outside. For example, if the cross-section of plastic pipes is 2 centimeters, then a metal analogue can be considered a pipe with a diameter of 1.5 centimeters. The same is true with fittings.
Thread direction
If the part has a right-hand thread for connection, then it is screwed clockwise, and a left-hand thread - vice versa. In other words, if the thread rises in the left direction, then it is left-handed. When installing water pipes, right-hand threads are usually used. Left-hand threads are mainly found when connecting pipes to batteries. On the right side of the radiator there is a right-hand thread, and vice versa. To make the transition to a right-hand thread or a contour, you must have a set of four fittings (two with left-hand threads and two with right-hand threads). You will also need rubber seals, bleeders, air valves and plugs.
Fittings for metal pipes (threaded) catalogue:
Brass connections
Brass products are usually used when connecting pipes made of copper and brass. There is a crimp ring inside the connection, which provides good strength to the fastening itself. The brass connection is installed using a wrench. With its help, the nut is tightened and tightened to a certain level. To avoid leakage, you need to carefully tighten the nut so as not to twist the thread.
Copper fasteners
Corrosion and temperature changes are not a problem for copper fittings. With their help you can connect products from any materials. At the same time, the use of various combinations can affect the operational life of the highway. Copper does not connect to galvanized non-alloy steel. Otherwise, corrosion will quickly begin to develop, causing the edges of the pipeline to collapse.
Cast iron connections
Cast iron fittings are cylindrical connections with threads at the ends. Cast iron is excellently used as a material for bends, couplings, tees, and crosses. For frequent use, it is necessary to install waterproof material. Cast iron is not expensive. The strength of the material and anti-corrosion properties are excellent, but in some cases even these are not enough to ensure a high degree of strength of the line.
Steel structures have proven themselves to be excellent due to their high degree of strength and reliability, but do not forget that a high-quality connection will only be achieved with fum tape or tow. Based on the material, fittings can have threads of different lengths. The main purpose of steel fittings is to connect two or more contours of different sections.
Stainless steel fittings are used in various connections. The advantage of the material is that stainless steel can be used repeatedly. Fasteners can be assembled and disassembled as much as you like - without loss of quality.
Pipe bends
Squeegees are pipes that have threads at both ends (barrels, rod connectors). On one side there is a short thread of 5-6 threads, and on the other there is an elongated thread of 20-30 threads. With the help of a drive, it is possible to connect two fixed pipes.
A bend is screwed into the fitting or reinforcing element, and a nut or coupling is installed on the other side. Flax is wound around the end of the pipe and covered with a sealant. The coupling is screwed onto the end of the pipe and connected to the outlet. Flax is placed between the nut and the coupling, pressing it against the coupling with a nut.
Pipe bends
Bends are used to adjust the direction of the pipeline in the horizontal or vertical direction at an angle of 30, 45, 60, 90 or 180 degrees. The bends have a smooth inner ball that prevents deposits from appearing on the pipes.
According to their design features, pipe bends can be bent or steeply curved, seamed or seamless. Bends with an angle of 90 degrees are popular. To make a bent elbow, a pipe with a diameter is used, which determines the method of production of the structures:
- cold-formed – from 15 m;
- hot bent - with a radius from 1.5 to 15 m.
Steeply curved fittings have a small bend angle, which simplifies the layout of the entire line. However, due to their small parameters, they do not compensate for the thermal expansion of pipes, for example, in a heating system. To create an outlet, a water or gas pipe is used, as well as seamless steel structures with a cross-section of 15-50 millimeters. If steeply curved pipes are produced by hot drawing or stamping, the manufacturer focuses on the operating temperature of the fitting up to 450 degrees.
To combine pipes into a complex structure, tees are used. They are designed to fix the side outlet to the main line. This makes it possible to change the direction of the pipeline at an angle of 90 degrees. Transitional and straight tees are available. Level adapters have the same cross-section on all branches. The adapter tee can have different hole sections. Stamped or seamless tees can be used at pressures up to 16 MPa, as well as at temperatures up to 450 degrees.
Threaded couplings
Using couplings, you can connect pipes without a welding machine. When installing pipes, you can make connections with different pipe diameters and from different materials. Couplings are classified according to the following parameters:
- according to the location of the thread - outside or inside. The first option is used when fastening elements that have different rigidities. The second option is used when connecting elements of the same rigidity;
- according to the connection method - equal bore, which connects pipes of the same cross-section, and transition - for connecting pipes of different diameters;
- split or solid couplings. Thus, detachable couplings simplify installation, due to which you can separately fix the coupling elements on the pipes, and then connect the pipeline attached to the parts of the coupling.
Pipe plugs
Plugs are used where it is impossible to permanently block the flow at one or more ends of the highway. Plugs work on the same principle as flange connections. Round steel discs with holes for threading bolts or studs to secure them. The temperature of the working environment when plugged can reach 500 degrees. Flange plugs are used respectively with flanges. The design is almost the same as that of the flange, only there is no central hole. The structures are made using the hot stamping method. Rotary plugs are a kind of valves that seal the ends of pipes during commissioning and also during testing work. Plugs are used when laying main branches or pipelines. The pressure in the system can be from 0.35 to 38 MPa. Plugs with diameters from 23 to 1420 millimeters are produced.
The most suitable option in conditions of high operating pressure are cast iron threaded fittings. Products are manufactured primarily by Russian industrial plants, and therefore fully comply with operational standards and requirements.
Product Features
Cast iron fittings for metal pipes have high heat transfer rates, which allows them to be used both in heating systems and for connecting pipes in bathrooms. You can buy or order this type of product at a favorable price. Cast iron is a fairly inexpensive metal that can be easily processed using modern equipment. For this reason they are inexpensive.
However, the lack of galvanization negatively affects the appearance of the product. Therefore, installing them in visible places reduces aesthetics. In such cases, it is recommended to use. Not only do they look better, but they are also highly resistant to corrosion.
The sale of such products is widespread both in online stores and in retail chains. You can purchase threaded fittings for pipes in Moscow from us. The AQUANEGA catalog has a large number of products at low cost. This will allow you to select equipment for any pipes and optimally allocate your budget.
