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Using just your hands at first, push one end of the connector into a section of aluminum tubing. Make sure to hold the aluminum tubing tightly. Push the connector into the tubing until the connector is fully seated. Using a rubber mallet, hammer the connector into the aluminum tubing the rest of the way.Using a propane torch and some aluminum brazing rods is a quick way to bonding aluminum without using a welder. It makes for a very strong bond and with a little practice can be done quickly with great looking results.
Contents
How do you join aluminum tubing without welding?
Using a propane torch and some aluminum brazing rods is a quick way to bonding aluminum without using a welder. It makes for a very strong bond and with a little practice can be done quickly with great looking results.
Can you screw into aluminum tubing?
Self-tapping screws, also called sheet metal screws, are very versatile. They can be used to securely fasten metals together, including aluminum.
How do you bolt aluminum together?
While many people worry that stainless steel fasteners, such as screws, bolts, nuts, or host of other options, won’t work with aluminum due to the risk of galvanic corrosion between the two very different metals, the truth is that stainless steel is the metal of choice for fasteners to secure your aluminum materials.
What is the best glue for aluminum to aluminum?
Bonding compound: Loctite Weld
Another option for gluing metal is Loctite Epoxy Weld Bonding Compound. A convenient alternative to welding, it’s the strongest solution for bonding most metals, including iron, steel, aluminum, brass, copper, and pewter.
Can you glue aluminium together?
The strongest glue to bond your aluminium would be an epoxy adhesive. In order of strongest to least strong, the strength rating of each adhesive is as follows: Epoxies: Which can bond aluminium with a strength of up to 30 MPa* Methyl Methacrylate adhesives: They have a strength of up to 25 MPa when bonding aluminium.
What wire do you use to weld aluminum?
Though 4043 is the most common wire alloy for aluminum MIG welding wires, you can choose between 4043 or 5356 wires. These types of wires can be used to weld the following types of aluminum: 3000, 4000, 5000 and 6000.
What kind of solder do you use on aluminum?
Also the opposite to gold soldering, aluminum soldering works best with a high Tin content alloy, such as Indalloy 121 (Ind121; 96.5Sn 3.5Ag, 221°C eutectic) or any of the “SAC alloys” (Tin-Silver-Copper or SnAgCu) like Ind256 (96.5Sn 3.0Ag 0.5Cu, 220°C liquidus).
Can you weld aluminum to aluminum?
Can You Stick Weld Aluminum? It’s possible to weld aluminum using stick welding methods, but it can be messy. Some of the best methods to use during the process include alternating or direct current TIG welding or MIG welding.
Can aluminum pipe be welded?
You can weld aluminum pipe joints using an open-root technique, but it’s more difficult to do than it is with steel. Aluminum’s high thermal conductivity means that the weld pool is larger than it is in steel. The weld pool also is more fluid, so it’s harder to control the molten pool.
Why is it difficult to weld aluminium?
The anodized coating gives the aluminum an attractive, uniform, hard surface that is also highly resistant to corrosion. The characteristics of this aluminum-oxide coating make it very difficult to weld. First of all, aluminum oxide is an electrical insulator, so starting and maintaining a stable arc is difficult.
How strong is aluminium brazing?
Quick repair: Aluminum brazing is a much faster metal-joining technique than TIG welding and other forms of welding. Since it has equivalent strength to these other metalworking skills, this makes aluminum brazing a good option for metalworking jobs that must be performed fast or as part of an assembly line.
What is brazing aluminum?
Braze Aluminum Welding Basics
The process of brazing refers to the use of gas generated heat (800 degrees F), and an iron-free filler such as aluminum to join to different metals. The aluminum itself can also be used to replace a part of another metal that might have cracked or fallen off.
How to “Weld” Aluminum Without a Welder
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How To Easily Join Together Aluminum Plates & Repair Aluminum Parts – YouTube
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- Most searched keywords: Whether you are looking for How To Easily Join Together Aluminum Plates & Repair Aluminum Parts – YouTube Updating Learn how to easily join together aluminum plates & repair aluminum parts using the brazing rods shown in this video. The resulting joint/repair is extremely…How To Easily Join Together Aluminum Plates & Repair Aluminum Parts, diy, aluminum, brazing, welding, high temperature, rod, stick, alumite, cracked, repair, homemade, wire brush, propane, torch, alumalloy, solder, electronicsNmore, make, hack, tutorial, circuit, Grant Thompson, CrazyRussianHacker, minutephysics, Colinfurze, insurance, lawyer, cancer, pharmaceutical, how to braze aluminum, how to repair aluminum, easily braze aluminum, how to solder aluminum, repair damaged aluminum prop, How to weld aluminum
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How to “Weld” Aluminum Without a Welder – YouTube
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How to Weld Aluminum Pipe – YouTube
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How to Connect Aluminum Pipe and Aluminum Pipe – Miracle
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How to connect two aluminum pipes. How to connect aluminum pipes Connecting aluminum pipes
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- Most searched keywords: Whether you are looking for How to connect two aluminum pipes. How to connect aluminum pipes Connecting aluminum pipes 1. The simplest and most reliable way to connect or attach something to aluminum or its alloys is, of course, a bolt and nut or rivets. All other methods …
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Soldering aluminum at home technologies methods
Connecting copper pipes instructions and comparison of various installation technologies
Materials and equipment
How copper tubes are soldered – process and rules
Welding Air Conditioner Tubes
Welding aluminum is not an easy task
Welding aluminum without using a welding machine
Attention
It’s simple – How to connect plastic and metal pipes without welding STROIM-GRAMOTNORU
How to connect two pipes of the same diameter actual ways of self-realization
Connect 2 aluminum pipes. Methods for connecting thin-walled aluminum pipes
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Connect 2 aluminum pipes Methods for connecting thin-walled aluminum pipes
All fittings can
Varieties of fittings
How to connect square aluminum pipes
Installation Choice Discalted VS In-Dispute
Three main ways of compound
Soldering aluminum at home technology methods
Compound of copper pipes instructions and comparison of various installation technologies
The use of aluminum pipes
Basic selection criteria
Methods for connecting aluminum pipes
How to connect aluminum tubes together. Applications, selection and installation of aluminum pipes
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How to connect aluminum tubes together Applications selection and installation of aluminum pipes
Soldering aluminum at home technologies methods
Connecting copper pipes instructions and comparison of various installation technologies
Welding aluminum is not an easy task
Welding aluminum without using a welding machine
Attention
Cast iron
Steel
Stainless steel
Copper
Conclusion
Mounting choice detachable vs one-piece
Three main connection methods
How to connect an aluminum pipe to an iron one. Connection methods for thin-walled aluminum pipes
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Fittings all can
Types of fittings
How to connect square aluminum pipes
Cast iron
Steel
stainless steel
Copper
Conclusion
Pipe production
Specifications and application
Working with aluminum tubes
Video Solder Aluminum – 13 UF for aluminum brazing
steel – Attach aluminum tube securely to base without welding/soldering? – Home Improvement Stack Exchange
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How to Connect Aluminum Tubing
In terms of the options available on the market today for tubing, there are many to choose from for applications ranging from automotive to industrial, architectural to medical and everything in between. Because of their unique characteristics of versatile nature, aluminum tubing is one of the most popular choices. There are a wide variety of applications for aluminum tubing, and many people opt for this type of tubing for their projects because of aluminum’s strength, ability to resist corrosion, and lightweight. If you’ve selected aluminum tubing for your next project, you may be wondering how to connect and join aluminum tubing. Below we’ll take a look at how to use aluminum tubing connectors to join aluminum tubing, as well as the steps to take to successfully join aluminum tubing using connectors.
How to Use Aluminum Tubing Connectors
An effective method for connecting aluminum tubing, particularly square aluminum tubing, is through the use of tubing connectors. Square aluminum tubing has a wide range of applications, capable of creating framing structures for things like storage racks and event tents. Because of their lightweight nature, this type of aluminum tubing is the optimal choice for structures that require assembly and disassembly. For such applications, tubing connectors are a great choice. Tubing connectors work by having opposing plugs that securely fit into the ends of two or more pieces of aluminum tubing. Once the sections of tubing are attached to the connector, a joint is created.
Most aluminum tubing connectors are constructed from durable nylon material, ensuring they hold their position as long as needed. Connectors are the go-to option for connecting aluminum tubing because they are available in a variety of styles, making it easy to find an option that suits your specific needs. For example, there are tubing connectors that range from one-way all the way up through six-ways, there are connectors that accommodate corner joints and straight joints, and there are even hinged connectors.
Take the following steps for joining aluminum tubing for a strong and durable structure:
The first step to connecting aluminum tubing is to cut your tubing to the desired length. You can enlist the help of a hacksaw or chop saw with a metal blade to cut your aluminum tubing. When using a chop saw, always make sure your tubing is clamped down. When cutting your tubing, make sure to take into account the width of the solid section of the connector you plan to use. Next, remove any sharp edges of your aluminum tubing. You can remove shards on the tubing by using an emery cloth or metal finishing pad. After you’ve removed any sharp edges from your tubing, it is time to attach to the connector. Using just your hands at first, push one end of the connector into a section of aluminum tubing. Make sure to hold the aluminum tubing tightly. Push the connector into the tubing until the connector is fully seated. Using a rubber mallet, hammer the connector into the aluminum tubing the rest of the way. Once you have a snug fit, you can stop. Now, push the available end of the connector into another section of aluminum tubing. Using your rubber mallet again, hammer the end of this piece of tubing until it is snugly attached to the connector. Continue to add connectors and sections of aluminum tubing until you have created the desired structure.
Other Ways to Connect Aluminum Tubing
While purchasing aluminum tubing connectors is the most cost-effective method, there are other ways to connect aluminum tubing as well that you might consider. Aluminum tubing can also be welded, however, this method requires professional expertise and a host of expensive equipment.
Aluminum Tubing Connectors from Eagle Mouldings
Eagle Mouldings has an unmatched selection of aluminum tubing connectors available in a variety of styles to help you achieve your next project. You won’t believe our selection of nylon connectors, ranging from straight joints to 6-way 90-degree connectors. Our experts are standing by to answer any questions you might have and to help you determine the options that are right for you. Contact Eagle Mouldings today!
How to connect aluminum tubes together. Applications, selection and installation of aluminum pipes
Soldering aluminum at home, technologies, methods
1. The simplest and most reliable way to connect or attach something to aluminum or its alloys is, of course, a bolt and nut or rivets. All other methods require some preparation, tools, special solders, fluxes for brazing aluminum, etc.
As practice shows, aluminum is generally not soldered in the usual way, with tin-lead solder, the reason for this is the oxide film, which forms almost instantly after cleaning the soldered surface.
2. Therefore, one of the ways to solder aluminum is – coating the surface, immediately after stripping, with a layer of molten rosin. Not the best, but after repeated attempts, rubbing the soldering point with a soldering iron tip, you can achieve satisfactory results.
3. Further, a solution of rosin in diethyl ether can be used for brazing aluminum. We clean the surface and immediately grease it with such a flux, and then sprinkle it with copper filings, which serve as an abrasive to remove the oxide film, and tin the soldering place with ordinary solder (tin-lead). After that, we solder a copper wire or something else to the tinned site.
4. The next technology for soldering aluminum is the use of a special solder for soldering aluminum and flux. Most of these solders are low-temperature, but their melting point is higher than that of tin-lead, in the range of 300-600 grams. C. The key to success is also good warm-up and for this use a gas torch or blowtorch.
High-temperature solders are used for soldering massive parts, they repair and restore parts made of aluminum and its alloys of any complexity (cars, motorcycles, etc.). The spike is very strong. In this way, pipes, for example, aluminum and copper, are soldered by inserting one into the other and soldering around. But, when soldering aluminum with other metals, make sure that the solder and flux are designed for one and the other metal.
The surface is cleaned and covered with a special flux, as in the previous cases, and when the solder melts, you can scrape the solder spot with the tip of a stainless steel knife (or a stainless steel brush) in order to better remove the oxide film. Thus, we tin the aluminum surface and solder everything we need to it.
This does not end with the methods of soldering aluminum at home. The electrochemical method can be applied.
5. We clean the surface and apply a few drops of CONCENTRATED copper sulfate solution to the soldering site. Then, we take a 5-12V power supply and a current of about 1 ampere (maybe more), connect a 4-5 Ohm resistance and a powerful one to the power supply. 5-10 W, and our fixture is ready. We calculate the load in such a way that the power supply unit does not burn out during operation, that is, approximately for a current of 1-5 Amperes.
Now we connect the aluminum billet to the negative pole of the power supply, and to the positive pole we attach a bare copper wire (you can twist it into a small flat spiral), which is then injected into a drop of vitriol solution so that the end does not touch the surface of the part. Everything is ready, turn on the power supply and wait a few minutes. The copper layer, as a result of electrolysis, will settle on the place for soldering. And then, wash off (but do not try to erase the copper), tinker, and solder the wires or terminal. This method, of course, is not suitable for soldering some massive parts, but it is suitable for contact with wires.
6. Alternatively, instead of a solution of vitriol, you can use hydrochloric acid: drop it into the place of soldering and then drive it with a copper drive along the contact pad. The deposition of copper is faster than in the first case, but one must be careful with the acid. And the place of soldering must be thoroughly washed off with water.
Connecting copper pipes: instructions and comparison of various installation technologies
So that the acid does not corrode the excess area, it can be sealed with tape or filled with paraffin, and the required area can be exposed. That. you can solder aluminum with copper and other metals, and the contact pads will have a beautiful, neat shape.
That’s all, and if there are any other ways of soldering aluminum or additions to the above, write.
Victor Donskoy
www.masteru.org.ua
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Welding aluminum is not an easy task
High electrical and thermal conductivity of aluminum, very low weight, combined with excellent mechanical properties of its alloys, made this material simply irreplaceable in many areas of production. But with all its unique properties, this metal is very difficult to weld. The ability to weld aluminum with high quality is what distinguishes a highly qualified welder from an amateur welder.
There are two main methods of welding aluminum parts:
MIG welding of aluminum by semiautomatic device
Argon arc TIG welding of aluminum
Sometimes it becomes necessary to connect aluminum parts to each other, but at the same time there is no suitable welding machine or professional welder at hand, and the strength of the connection does not play a special role. In this case, the method described in our video instruction will come to the rescue.
You will need:
Propane burner
Aluminum brazing rods
Surface degreaser
Clamps for holding parts together
“Welding” aluminum without using a welding machine
Attention
In fact, this is certainly not welding. This method, perhaps, can be called soldering. Despite this, this method is quite suitable in the case when the parts to be connected will not experience strong loads, and not strong ones either. For example, for the manufacture of decorative items, souvenirs.
So, if you need to weld aluminum parts, use the services of professionals. Or buy a welding machine and become a professional yourself. Good luck!
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More about the complex: the connection of metal pipes for water supply, sewerage, metal frames
This article is about how to connect metal pipes by threading and welding, fittings and embossing of sockets when installing water pipes and sewers. I will not limit myself to plumbing and will touch upon, albeit in passing, the method of mounting metal frames for shelving, temporary buildings and greenhouses. So, let’s go.
Cast iron
Currently, cast-iron pipes are used mainly for laying sewers, and then very limitedly: they have been seriously pushed aside by cheaper and lighter products made of PVC and polypropylene.
Cast-iron pressure pipes are even less popular: they are used for laying a water supply system with a small burial under conditions of significant load on the ground.
Socket connection with embossing
When installing a gravity drainage system, the connection of cast iron pipes is performed as follows:
The above diagram needs a few comments:
A more durable graphite gland can be used instead of a cable (oiled or bitumen-impregnated organic fiber);
Embossing is easy to make by flattening one end of a steel tube with a diameter of 10 – 12 mm and bending its end in the shape of a club;
Personally, I have always used a wide, sturdy screwdriver for chasing joints. It is less convenient, but takes up less space in the toolbox and is useful for many other plumbing work.
To seal the socket, you can use clean cement, diluted with water to the consistency of very thick sour cream;
The bell during operation must be rigidly fixed… Otherwise, it will loosen and leak.
Socket connection with rubber ring
This type of connection is typical for ductile iron pipes (made of ductile iron with spheroidal graphite). Due to the combination of corrosion resistance and the plasticity characteristic of steel, the material is in demand, among other things, for the installation of water pipes.
The assembly instructions for the joint are extremely simple: the smooth beveled end of the pipe is pressed into a bell with a rubber seal. Since with large pipe diameters, the assembly of the connection requires great effort, and the mass of the pipes is tens and hundreds of kilograms, loading equipment is often used for installation.
Previously, pipes made of gray cast iron with sockets for embossing were often used for the installation of water pipes. However, their embedding was carried out not with cement, but with lead.
Steel
Steel has also been replaced by modern polymers; however, in heating and hot water supply systems in apartment buildings, it is still in demand more than alternatives. The reason is simple: the enormous tensile strength of steel pipes allows them to withstand water hammer and other force majeure characteristic of central heating and heating mains without the risk of destruction.
Electric welding
The essence of the method is with the transfer of the electrode metal by an electric arc to grounded parts. At the same time, the edges of the pipes being welded are melted, and the seam due to molecular diffusion becomes one with them. Slag forms a coating on the weld surface that prevents metal oxidation and is cleaned after cooling.
Here’s what the process looks like from a welder’s point of view:
Both pipes are cut at right angles to the longitudinal axis. With a large wall thickness, the outer chamfer is removed;
Particularly thick-walled, large-diameter pipes require chamfering both internally and externally. They are also boiled on both sides.
On opposite sides of the pipes, two tacks are made, after which they are aligned along a common axis; The seam is welded along the entire length. To do this, the electrode is brought to the part at an angle to the surface, so as to avoid sticking of the core. To obtain a sealed seam, it is necessary to prevent the metal from grasping in the welding area: the melt pool must be constantly visible under the electrode.
Gas welding
What does gas welding of steel pipes look like?
The burner is connected with hoses to oxygen (blue) and acetylene (white) cylinders; The torch is ignited and adjusted in such a way that the area of bright blue glow has a length of 1.5 – 2 cm; The edges of the pipe are heated until the edges are melted, after which a welding wire is introduced into the blue area of the torch. Its melt is blown away by the burner onto the seam, gradually filling it. And in this case, it is important not to let the molten bath grab: having melted the metal onto a cold pipe, you will not achieve tightness.
It is easier for an amateur to learn how to cook sealed seams with gas. Gas welding is forgiving of mistakes: the seam can always be reheated with a torch and brought to its melting point. It took me a few hours to complete the basic training, while your humble servant never learned how to weld hermetically with electric welding.
Fixed seams
Both gas and electric arc welding use two of the same techniques for welding fixed seams:
Mirror… It is placed on the back of the pipe, after which the seam is welded with mirror reflection control; Window(operation suture). A U-shaped cut is made in the pipe; part of the pipe is bent; the seam is boiled from the inside; then the window is folded back to its original position and welded.
Carvings
How to connect metal pipes with threads?
In general, only two types of threads are used:
Short (5 strands) for turning parts; Long, or squeegee (12 – 15 threads) – for the case when two fixed pipes are connected. In this case, a coupling and a locknut are sequentially driven from the long thread to the short thread of the attached part.
The tightness of the threaded connection is ensured by the winding laid along the thread. Plumbing uses in this role:
The thread is cut:
With your own hands, using a die or die (several separate cutters in a common mandrel);
When threading, remove the outer chamfer by making an entry for the die, and lubricate the pipe with any oil (even diesel fuel or mining will do).
On a screw-cutting lathe.
Galvanized pipes are assembled only and exclusively on threads. Welding burns out a layer of zinc in the seam area: steel melts at 1400 degrees, and zinc at 900 already evaporates. As a result, you get pipes without anti-corrosion coating at the price of galvanizing.
Compression fittings
The threadless connection of steel pipes is made with a conventional compression fitting with a union nut, a thrust washer and a rubber O-ring. Fittings are very useful on old ones that are dangerous to thread, in the absence of welding and the ability to completely replace old pipes.
Connection installation looks like this:
However, there are several nuances here:
It is advisable to clean up layers of old paint and rust on the pipe; It will not hurt to remove the outer chamfer on it; When assembling the connection, do not use lubricants. They will increase the risk of undocking in the event of an accidental jerk.
Wireframes
Frame structures do not require connections and are assembled on the so-called “crabs” – overlays tightened with ordinary bolts. “Crabs” are manufactured for all common sizes of round and shaped pipes. They can be used to assemble not only steel but also aluminum frames.
The greenhouse frame is assembled on “crabs”.
Stainless steel
Corrugated stainless steel pipe is an excellent alternative to galvanizing, comparing favorably with it in ease of installation and flexibility. The tensile strength at a diameter of 15 mm reaches, according to Lavita, 210 atmospheres. Since all stainless pipes on the market have the same wall thickness – 0.3 mm – similar strength values can be expected from products from other manufacturers.
Let’s go back to connecting pipes with fittings. It is completely identical to using a compression fitting for a steel pipe: the cut-off end is inserted into the fitting with a loose union nut, and then tightened. Tools – a pair of adjustable or gas wrenches. The assembled connection is completely sealed and does not require maintenance; it can fit into a gutter or screed.
Manufacturers guarantee an unlimited service life for stainless steel pipes. Fitting seals, however, do not last forever: after 30 years, you or your children will have to attend to replacing the silicone rings.
Copper
The connection of copper pipes is carried out:
Soldering;
Compression fittings.
Let’s take a look at both ways.
Soldering
The connection requires the following sequence of actions:
One of the pipes is expanded. The gap between the socket and the smooth pipe should be 0.1 – 0.15 mm. Alternatively, solder fittings with ready-made sockets are used;
The inner surface of the socket and the outer surface of the pipe are sanded with thin emery and coated with flux. When heated, it will cleanse copper from oxides and provide a reliable adhesion between it and the solder; The pipe is inserted into the fitting; The socket with the pipe inserted into it heats up to a temperature of at least 300C (for low-temperature solders). Usually a gas burner is used for this purpose, however, at the cost of a little more time, you can get by with a construction hairdryer: most models from decent manufacturers are capable of heating the air up to 550 – 600C;
The solder bar is introduced into the torch or hot air stream and touches the socket. Thanks to the capillary effect, the solder melt quickly fills the entire gap.
Compression fittings
These products, unlike fittings with rubber seals, tolerate heat well: tightness is ensured by soft copper rings.
How to connect copper pipes with fittings? Very simple:
A union nut and an O-ring are sequentially put on the pipe; The pipe is inserted into the body of the fitting; The union nut is tightened, pressing the pipe with a copper ring. Due to its plasticity, the metal fills in the slightest irregularities and ensures complete tightness of the connection.
Conclusion
I hope that my short review seemed to the reader quite informative. Some additional information can be explored by watching the video in this article. I look forward to your comments and additions.
Good luck, comrades!
July 31, 2016
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Copper pipes are used for the installation of hot water supply, cold water supply, air conditioning, heating, and gas supply systems. They are expensive, but durable, plastic, and corrosion resistant. But in order for engineering communications from them to serve for decades, the connection of copper pipes must be done correctly.
We will tell you how the device of copper pipelines is made, which ensures the tightness of the transported medium or circulating heat carrier. Installation technologies are described in detail in the article presented for review. Based on our advice, the construction of the systems will be excellent.
To carry out the installation of internal pipelines in the house, you can choose a pipe made of plastic, metal-plastic or stainless steel. But only a copper analog is able to serve without problems and overhaul for more than half a century.
Correctly mounted copper piping systems in practice work properly throughout the entire service life that is assigned to a cottage or apartment building.
According to the statistics of accidents, the fittings and soldered joints used during installation turn out to be more reliable than the copper pipes themselves – if a breakthrough occurs in the system, then only on the wall of the pipe product
Copper pipes are not afraid of prolonged heat loads, chlorine and ultraviolet light. When freezing, they do not crack, and when the temperature of the internal environment (water, wastewater, gas) changes, they do not change their geometry.
Unlike plastic counterparts, they do not sag. This plastic is susceptible to expansion at high temperatures, with copper this does not happen by definition.
There are two drawbacks to tubular copper products – the high price and softness of the metal. However, the high cost of the material pays off with a long service life.
And so that the walls of the pipes are not damaged from the inside by erosion, filters must be installed in the system. If there are no contaminants in the form of solid particles in the water, then there will be no problems with the destruction of pipelines.
Pipe processing and welding requirements
When working with copper pipes, the following rules must be observed:
When installing cold water or hot water supply by soldering, the use of lead solder should be excluded – lead is too toxic. The water flow rate should not exceed 2 m / s, otherwise the smallest particles of sand or other solid matter will gradually begin to destroy the pipe walls. When using fluxes, after completion of the installation, the pipeline system must be flushed without fail – the flux is an aggressive substance and will contribute to the corrosion of copper tube walls. When soldering, overheating of the joint must not be allowed – this can lead not only to the formation of a leaky joint, but also to a loss of strength of the copper product. Transitions of pipes from copper to other metals (steel and aluminum) are recommended to be made using brass or bronze adapter fittings – otherwise, steel and aluminum pipes will quickly begin to corrode. Burrs (metal beads) and burrs in the places of cutting must be removed – their presence leads to the formation of turbulent eddies in the water flow, which contributes to erosion and a decrease in the operating life of the copper pipeline. When preparing copper pipes for connection, it is strictly forbidden to use abrasives – their remaining after installation inside the particles will damage the metal and form a fistula.
If, in addition to copper, there are pipes or elements made of other metals in the water supply or heating system in the house, then the water flow should go from them to copper, and not vice versa. The flow of water from copper to steel, zinc or aluminum will lead to rapid electrochemical corrosion of the pipeline sections from the latter.
Copper pipes are cut and bent without problems, even a novice craftsman can cope with their connection into a single pipeline system. You just need to select the appropriate tools and follow the instructions.
Due to the ductility and strength of the metal, copper pipes are easily cut and bent. Piping can be rotated using either a pipe bender or fittings. And for the device branching and connections with various devices, there are many parts made of heat-resistant plastics, brass, stainless steel and bronze.
About the interaction of copper with other metals
In most private houses, domestic water pipes are assembled from steel and aluminum pipes. Heating systems also include steel or aluminum radiators. Incorrect insertion into such a copper pipe layout is fraught with considerable problems.
According to building codes, in order to exclude corrosion processes in the pipeline from pipes of different metal, the flow of water must be directed to copper
The most optimal installation option is the use of pipes and devices exclusively made of copper and its alloys. Nowadays, bimetallic aluminum-copper radiators, as well as the corresponding fittings and shut-off valves, can be found without any problems. It is worth combining different metals only in extreme cases.
If overlap is unavoidable, then copper should be the final one in the chain of pipeline elements. It is impossible to rid her of the ability to conduct electric current.
And in the presence of even a weak current, this metal creates galvanic vapors with steel, aluminum and zinc, which inevitably leads to their premature corrosion. When installing a water supply system, it is imperative to insert bronze adapters between them.
Another potential problem is oxygen in water. The higher its content, the faster the pipes corrode. This applies to pipelines both from the same metal and made from different ones.
Often, the owners of cottages make a serious mistake, often changing the coolant in the heating system. This only leads to the addition of completely unnecessary portions of oxygen. It is best not to completely change the water, but to top it up when the need arises.
Mounting choice: detachable vs one-piece
In order to form a single pipeline system, you can use several methods of their articulation. Various plumbers use crimp and press fittings, welding or soldering. But before you start work yourself, you need to decide – be one-piece pipeline or detachable.
There are three installation technologies for connecting copper pipes:
electric welding;
soldering with a torch or electric soldering iron;
pressing.
All these technologies can be applied in the formation of both detachable and one-piece systems. There is more a question of using a variety of fittings and adapters or rejecting them.
If the structure cannot be disassembled without destroying its individual parts, then it is considered one-piece – it comes out cheaper, but it is more difficult to repair it
If the pipeline system is needed detachable, as well as simpler in terms of repair and adding new elements, then the connections must be made detachable.
For this, fittings are used:
compression;
threaded;
self-locking.
It is easier to make detachable connections yourself, you can even do without soldering. They do not require excessively high qualifications from the master.
However, such assemblies need constant inspection and tightening of the nuts in order to exclude leaks. Changes in pressure and temperature in the system lead to loosening of the fasteners. And from time to time it is recommended to tighten them.
If access to copper pipes is planned to be closed tightly with finishing or concrete screed, then it is best to connect them into an integral structure by soldering or welding. Such a system is more reliable, durable and tear resistant.
Do not thread on copper products. This metal is too soft in structure. When installing a detachable pipeline, all threaded connections must be made through fittings. The latter can be connected to a copper pipe by pressing or soldering.
Before making the connections, copper pipes are prepared in a special way:
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Copper pipe is cut with a metal hacksaw or pipe cutter. The cutting line must be exactly at right angles
After cutting, the end of the pipe must be processed with a deburrer to remove the slightest irregularities and burrs.
The part of the pipe immersed in the socket prepared for brazing is thoroughly cleaned of dirt and degreased
It is mandatory to clean and degrease the socket of the coupling, branch or tee, which will be soldered to the pipe
Cutting copper pipe before joining
Deburring with a deburring tool
Degreasing and cleaning the outer surface
Stripping the socket of the coupling and fitting
Three main connection methods
Before connecting the pieces of copper pipes, it is necessary to cut them in accordance with the wiring diagram and prepare them. You will need a pipe cutter or a hacksaw for metal, a pipe bender and a file. And fine-grained sandpaper will not interfere with cleaning the ends.
Only having in hand a diagram of the future pipeline system, you can calculate the required amount of consumables. It is necessary to decide in advance where and of what diameter the pipes will be mounted. It is also necessary to clearly understand how many connecting elements are required for this.
Option # 1: Welding copper pipes
Automated or manual welding of copper pipes requires electrodes and a protective gas (nitrogen, argon or helium). You will also need a DC welder and in some cases a torch. The electrode can be graphite, tungsten, copper or carbon.
The main disadvantage of this installation technology is significant differences in the characteristics of the resulting seam and pipe metal. They differ in chemical composition, internal structure, electrical and thermal conductivity. If the welding is performed incorrectly, the joint may even part afterwards.
Due to the alloying of copper as a result of the action of the deoxidizer present in the electrode, the weld is very different in many parameters from the main welded metal.
Welding copper pipes can only be properly connected by a qualified craftsman. This requires certain knowledge and skills.
This installation option has a lot of technological nuances. If you plan to do everything yourself, but you have no experience with a welding machine, then it is better to use a different connection method.
Option # 2: Capillary brazing
In domestic conditions, copper pipes are rarely connected by welding plumbing. It is too complex, requires specialized skills and time consuming business. It is easier to use the capillary soldering method using a gas torch or blowtorch.
The technology of brazing copper pipes with solder is based on capillary rise (seepage) of the latter after melting along the gap between two pressed metal planes
Soldering of copper pipes is:
low-temperature – soft solders and a blowtorch are used;
high-temperature – refractory alloys and a propane or acetylene burner are used.
In the end result, these methods of brazing copper pipes do not have much difference. The connection in both cases is reliable and durable. The seam with the high-temperature method is somewhat stronger. However, due to the high temperature of the gas jet from the burner, the risk of burning through the metal of the tube wall increases.
Solders are used on the basis of tin or lead with the addition of bismuth, selenium, copper and silver. However, if the pipes are brazed for the drinking water supply system, then it is better to refuse the lead version due to its toxicity.
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To implement low-temperature welding, it is not necessary to have special equipment and special skills of the performer. You can carry it out on your own
The connection by low-temperature brazing is used mainly in the assembly of pipelines from soft pipes R 220. They withstand a pressure of 220 N / mm², which does not exceed the operating parameters in domestic heating and water supply networks
To perform low-temperature brazing, pipes and solder are enough to heat up with a standard blowtorch
To create a melt that fills the capillaries and the gap between the pipes to be connected, low-melting solder is used, which quickly melts and spreads freely along the socket
Low-temperature welding in a domestic environment
Coil with soft copper pipes
Soldering torch for low temperature soldering
Using low-melting solder
There are two ways to solder copper pipelines:
bell-shaped;
with fittings.
The first option provides for the expansion of the end of one of the pipes to be connected with a special expander. Then this socket is put on the second pipe, and the joint is soldered with solder.
The expansion of the end is made so that a gap of 0.1–0.2 mm remains between the outer and inner walls of the products to be joined. You don’t need more. Solder on it, due to the capillary effect, will still fill the entire available lumen.
In this technology, it is important not to damage the pipe during expansion. If it is made of hard copper (R 290), then it will have to be pre-fired. In this case, the metal at the junction acquires the properties of a soft analogue. It is important not to forget about these changes when calculating the parameters of the working pressure in the pipeline.
The use of special fittings for capillary brazing eliminates errors with the degree of expansion of the pipe when forming a socket, they are initially adjusted to the required dimensions
To simplify the do-it-yourself soldering of copper pipeline elements, it is enough to purchase ready-made couplings, turns, tees and plugs. They already have the required socket. The use of these parts leads to an increase in the cost of installation work, but greatly simplifies them.
To clean the metal in the place of soldering and lubricate the solder, the ends of the pipes to be connected are coated with flux. It should be applied exclusively to the outside of the pipe walls. Sockets and fittings are not processed from the inside. This is simply not necessary.
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High-temperature brazing requires a propane or acetylene gas torch
For efficient low-temperature melting, fittings with fusible solder melted into them are used. They can be used for high-temperature brazing.
To improve the quality of the solder, the pipe sections to be joined are coated with flux, which plays the role of a lubricant and etching of the metal. In high-temperature brazing, borax is used as a flux
For the production of high-temperature brazing, you will need a refractory solder made of bronze or a silver-copper alloy. It comes in the form of rigid rods with a diameter of 3 mm
Propane or acetylene gas burner
Using fused solder fittings
Fluxing the joint area
Refractory rod
To perform the brazing, the pipes are inserted into the socket and heated with a torch. When the desired temperature is reached, solder is brought to the gap. It begins to melt and flow inward.
If too much of it gets into the joint, it will leak from the inside of the pipeline, which will lead to a narrowing of the inner diameter of the pipe. And at a low flow rate, the connection will not be soldered enough.
If problems arise with the use of solder, then you can use fittings in which it already exists in the required volumes. To simplify the work, even at the factory, a capillary band made of the corresponding alloy is introduced from the inside into these connecting elements. This part only needs to be put on the pipe and heated up with a burner.
Option # 3: Push-in fittings and press sleeves
One-piece connection of copper pipes can also be performed using press couplings or compression (collet) fittings. They use an O-ring instead of solder. The first option is clamped on the pipe with special pliers, and the second – with union nuts and a key to them.
How to connect an aluminum pipe to an iron one. Connection methods for thin-walled aluminum pipes
Hello dear visitors. A long time ago, in those days, when in Russia, the use of the CB radio band had just been allowed, a simple antenna was urgently needed. Naturally, the simplest and not requiring SU (matching devices) is GP. They had pipes from the old Wave Canal and a broken cot.
It was necessary to connect three tubes into a single whole, i.e. receive a 2.7m LENGTH PIN. The inner diameter of the tubes from the clamshell was 2mm larger than the outer diameter of the tubes from the old antenna. This is where the idea came up to use a split pipe, which could have an inner diameter greater than or less than the outer diameter of the connected pipes. In the first case, it is necessary to make a cut in the pipe of such a width that, when the pipe is compressed with clamps, it tightly compresses the connected pipe.
The tubes connected in this way have good electrical contact. The connection is solid. If necessary, the entire system is very quickly disassembled. I hope everything is clear from photos 1 and 2. Photo 1 shows just one of the GP antenna pipes, traces of old clamps are visible. In this way, you can also connect wooden parts.
Support for branches
Using such a connection (see photo 3), you can make collapsible, lightweight props for the branches of fruit trees. The stores sell cuttings for rakes, which have a length of 1.2 … 1.5 meters, a diameter of 3 to 4 cm.
Using a pair of these cuttings, a pair of worm-drive clamps, and a split aluminum tube of a suitable diameter, you can make an excellent support. Another advantage of such a connection is the ability to tighten the clamps when, for example, the wood of the handle dries out. A couple of turns of the screwdriver – and the connection becomes rigid again. Sometimes the cuttings of shovels break, especially when they are made of birch, and there is no new one at hand, in this case, such a connection can also be used at the break point. It turns out a kind of bandage.
Grass scythe repair
For three years, the scythe at the spit broke in the place where the handle was embedded. Transplanting a scythe is a very serious and painstaking task. Again I remembered the split pipe. I thought temporarily, but it turned out like the Russians. The spigot broke in such a way that I had to shorten it, so instead of a split pipe, I used a pipe with cut ends. Here’s what it looks like.
If you are interested in how to connect two aluminum pipes, we will talk about the intricacies of this case and reveal its little tricks. The need for this operation appears quite often in everyday life and sometimes very experienced craftsmen can be confused. As a rule, this task is performed by welding or threading. But there are other ways as well. After all, welding works are not only expensive, they require professional equipment and a specialist and cannot always be performed in the right place. In addition, sometimes pipes need to be connected very quickly, without waiting for the arrival of the welder with the equipment.
Fittings all can
In order to quickly and reliably connect aluminum pipes at home, special fasteners have been created – fittings.
They are divided into two types:
according to the cross section of the connected elements: straight (two identical diameters) and transitional (two different diameters),
by purpose: corners and bends, tees, couplings, crosses, fittings, adapters, plugs, caps.
Fittings not only solve the problem of how to connect aluminum pipes without welding, but also simplify the process of installing any communication networks or manufacturing various structures.
The most popular fittings are a crimp type of installation, or rather, press fittings.
Why Compression Fittings Are Recommended:
pipe joints are completely sealed,
strength and reliability of the connection,
vibration resistance.
Types of fittings
Couplings are the most commonly used type of fittings. High-quality couplings with fasteners allow you to quickly and reliably ensure a reliable connection of two or more pipes. It is often used and such a variety of it as the Gebo coupling.
Flanges with rubber gaskets ensure a secure pipe connection. Such elements are preferably chosen with a large cross section.
Also, the question of how to connect an aluminum pipe to each other can be answered by such a device as a repair and installation clip. This is a coupling or triple type of fitting, consisting of 2 parts fastened together. This is a very good way for an express pipe connection – for example, in case of an accident or other emergency.
No less effective and simple is the method of joining pipes using a clamp, which provides a reliable connection. It tightens on one side, which is not like a clip. The connection is therefore considered to be more durable.
How to connect square aluminum pipes
Aluminum pipes of square, rectangular or other sections are usually connected by means of a crab system or clamps.
The crab system is narrow strips of metal from 2 parts interconnected. They look like the letters T, X or G and can reliably cover pipe sections. The resulting joints are highly reliable. But docking occurs only at a right angle and is made for pipes of a small cross section.
A more universal method of joining pipes of a complex profile is a clamp. We offer to pick up and buy an aluminum pipe on our website at competitive prices and in an extensive selection.
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Details about the complex: the connection of metal pipes for water supply, sewerage, metal frames
This article is about how, when installing water pipes and sewers, to connect metal pipes by threading and welding, fittings and chasing sockets. I will not limit myself to plumbing and will touch, albeit in passing, on the method of installing metal frames for shelving, temporary buildings and greenhouses. So, let’s go.
Cast iron
At present, cast-iron pipes are used mainly for laying sewers, and even then very limitedly: they have been seriously supplanted by cheaper and lighter PVC and polypropylene products.
Pressure cast-iron pipes are even less popular: they are used for laying water pipes with a small depth in conditions of a significant load on the ground.
Socket connection with embossing
When installing a free-flow sewer, the connection of cast-iron pipes is performed as follows:
The diagram above needs a few comments:
Instead of a cable (organic fiber impregnated with oil or bitumen), a more durable graphite gland can be used;
Chasing is easy to make by flattening one end of a steel tube with a diameter of 10 – 12 mm and bending its end into a club;
Personally, I have always used a wide, strong screwdriver for chasing joints. It is less convenient, but takes up less space in the toolbox and is useful for many other plumbing jobs.
To seal the socket, you can use pure cement, diluted with water to the consistency of very thick sour cream;
The socket during operation must be rigidly fixed. Otherwise, it will loosen and leak.
Socket connection with rubber ring
This type of connection is typical for ductile iron pipes (ductile iron). Due to the combination of corrosion resistance and plasticity characteristic of steel, the material is in demand, among other things, in the installation of water pipes.
The instruction for assembling the connection is extremely simple: the smooth end of the pipe with the chamfer removed is pressed into the socket with a rubber seal. Since, with large pipe diameters, the assembly of the connection requires a lot of effort, and the mass of the pipes is estimated at tens and hundreds of kilograms, loading equipment is often used for installation.
Previously, pipes made of gray cast iron with sockets for embossing were often used for the installation of water pipes. However, their sealing was carried out not with cement, but with lead.
Steel
Steel has also been supplanted by modern polymers; however, in the heating and hot water systems of apartment buildings, it is still in demand more than alternatives. The reason is simple: the enormous tensile strength of steel pipes allows them to endure water hammer and other force majeure, typical for central heating and heating mains, without the risk of destruction.
Electric welding
The essence of the method is with the transfer of the electrode metal by an electric arc to grounded parts. The edges of the pipes to be welded are melted, and the seam, due to molecular diffusion, becomes one with them. The slag forms a coating on the surface of the weld, which prevents the oxidation of the metal, and is cleaned after cooling.
Here’s what the process looks like from the welder’s point of view:
Both pipes face at right angles to the longitudinal axis. With a large wall thickness, the outer chamfer is removed;
Particularly thick-walled, large-diameter pipes require chamfering both inside and out. They are also welded on both sides.
Two tacks are made on opposite sides of the pipes, after which they are aligned along a common axis; The seam is welded along the entire length. To do this, the electrode is brought to the part at an angle to the surface, so as to avoid sticking of the core. To obtain a sealed seam, it is necessary to prevent the metal from seizing in the welding area: a melt pool must be constantly visible under the electrode.
gas welding
What does gas welding of steel pipes look like?
The burner is connected by hoses to oxygen (blue) and acetylene (white) cylinders; The torch is ignited and adjusted in such a way that the area of bright blue glow has a length of 1.5 – 2 cm; The edges of the pipe are heated until the edges are melted, after which a welding wire is introduced into the blue area of the torch. Its melt is blown off by a burner onto the seam, gradually filling it. And in this case, it is important not to let the melt bath seize: by melting metal onto a cold pipe, you will not achieve tightness.
It is easier for an amateur to learn how to weld sealed seams with gas. Gas welding forgives mistakes: the seam can always be reheated with a torch and brought to a melting temperature. It took me a few hours for basic training, while your obedient servant did not learn how to hermetically cook with electric welding.
Fixed seams
Both gas and electric arc welding use two identical techniques for welding fixed seams:
Mirror. It is placed on the back side of the pipe, after which the seam is welded with mirror reflection control; Window(surgical suture). A U-shaped cut is made in the pipe; part of the pipe is bent; the seam is welded from the inside; then the window is folded back to its original position and sealed.
Threads
How to connect metal pipes on threads?
In general, only two types of threads are used:
Short (5 threads) for turning parts; Long, or drive (12 – 15 threads) – for the case when two fixed pipes are connected. In this case, a coupling and a lock nut are sequentially driven from a long thread to a short thread of the attached part.
The tightness of the threaded connection is ensured by winding laid along the thread. In plumbing in this role are used:
The thread is cut:
With your own hands, using a die or klupp (several individual incisors in a common mandrel);
When cutting threads, remove the outer chamfer, making an entry for the die, and lubricate the pipe with any oil (even a solarium or mining will do).
On a screw-cutting lathe.
Galvanized pipes are assembled only and exclusively on threads. Welding burns out a layer of zinc in the seam area: steel melts at 1400 degrees, and zinc at 900 already evaporates. As a result, you get pipes without anti-corrosion coating at the price of galvanizing.
Compression fittings
Threadless connection of steel pipes is carried out with a conventional compression fitting with a union nut, a thrust ring and a rubber ring seal. Fittings are very useful on old ones that are dangerous to thread, in the absence of welding and the ability to completely replace old pipes.
The connection setup looks like this:
There are a few nuances, however, here:
It is desirable to clean the layers of old paint and rust on the pipe; It does not hurt to remove the outer chamfer on it; Lubricants must not be used when assembling the joint. They will increase the risk of undocking if accidentally jerked.
Frameworks
Frame structures do not require connections and are assembled on the so-called “crabs” – linings that are pulled together with ordinary bolts. “Crabs” are produced for all running sizes of round and shaped pipes. They can be used to assemble not only steel, but also aluminum frames.
The frame of the greenhouse is assembled on “crabs”.
stainless steel
Corrugated stainless steel pipe is an excellent alternative to galvanizing, which compares favorably with its ease of installation and flexibility. Tensile strength at a diameter of 15 mm reaches, according to Lavita, 210 atmospheres. Since all stainless pipes on the market have the same wall thickness – 0.3 mm – similar strength indicators can be expected from products from other manufacturers.
Let’s go back to connecting pipes with fittings. It is completely identical to the use of a compression fitting for a steel pipe: the end cut in place is inserted into the fitting with the union nut loosened, after which it is tightened. Tools – a pair of adjustable or gas wrenches. The assembled connection is completely sealed and does not require maintenance; it can fit into a strobe or screed.
Manufacturers guarantee an unlimited service life of stainless steel pipes. Fitting seals, however, do not last forever: in 30 years, you or your children will have to attend to the replacement of silicone rings.
Copper
Connection of copper pipes is carried out:
soldering;
Compression fittings.
Let’s take a look at both methods.
Soldering
The connection requires the following sequence of actions:
One of the pipes is flared. The gap between the socket and the smooth pipe should be 0.1 – 0.15 mm. As an option, solder fittings with ready-made sockets are used;
The inner surface of the socket and the outer surface of the pipe are sanded with fine emery and covered with flux. When heated, it will clean the copper from oxides and provide reliable adhesion between it and the solder; The pipe is inserted into the fitting; The socket with the pipe inserted into it is heated to a temperature of at least 300C (for low-temperature solders). Usually a gas burner is used for this purpose, however, at the cost of a little more time, you can get by with a building hair dryer: most models from decent manufacturers are able to heat the air up to 550 – 600C;
The solder rod is introduced into the burner flame or hot air flow and touches the socket. The solder melt quickly fills the entire gap due to the capillary effect.
Compression fittings
These products, unlike fittings with rubber seals, tolerate heat well: tightness is ensured by soft copper rings.
How to connect copper pipes with fittings? Very simple:
A union nut and a sealing ring are successively put on the pipe; The pipe is inserted into the fitting body; The union nut is tightened, compressing the pipe with a copper ring. Due to its plasticity, the metal fills the slightest irregularities and ensures complete tightness of the joint.
Conclusion
I hope that my short review seemed to the reader quite informative. Some additional information can be learned by watching the video in this article. I look forward to your comments and additions.
Good luck, comrades!
July 31, 2016
If you want to express gratitude, add a clarification or objection, ask the author something – add a comment or say thanks!
Tubes made of aluminum and its alloys are used in various industries due to the combination of unique technological characteristics. There are the following profiles: round, square, rectangular and shaped. One of the common types of tubular products is round aluminum tubes with a diameter of 6–10 mm. Manufactured according to various technologies and various GOSTs, they differ in their properties and areas of application.
Pipe production
Aluminum tubes, depending on the production method, are:
cold-formed;
welded straight seam;
pressed.
Cold formed aluminum
Cold-formed aluminum tubes with a diameter of 6 to 150 mm are produced in accordance with GOST 18475-82. Their purpose is general purpose. The main characteristic of these products, in addition to geometric ones, is the brand of aluminum (or alloy) and the state of the material, which, depending on the heat treatment, can be
annealed
cold-worked,
hardened
aged.
Supplied in cuts and coils. Seamless cold-formed tubes from some grades of aluminum and its alloys are produced according to OST 1 92096-83. Their purpose is special branches of engineering.
Longitudinally welded pipes
Aluminum tubes with a diameter of 10 to 220 mm, made by continuous HFC welding from a tape, are called straight-seam welded and must comply with GOST GOST 23697-79. The material condition of these pipes is
cold-worked,
tempered + aged.
Pipes made from annealed tape are not subjected to additional heat treatment. The type of heat treatment of pipe products depends on the material of the tape. The batch marking includes data on the state of the material and the grade of the alloy.
Extruded aluminum pipes
Pressed aluminum tubes with a diameter of 18 to 300 mm are produced in accordance with GOST 18482-79. According to this standard, thin-walled (up to 5 mm) and thick-walled products produced by pressing through a press washer are distinguished. According to the condition of the tube material, there may be
annealed
hardened + aged.
In the manufacture of pipe products by hot pressing, it is allowed not to perform heat treatment. The purpose of the products is general industrial.
Aluminum tubes 4 mm and 5 mm, which appear on sale, are all imported. According to GOST, pipe products of such diameters are not produced.
Specifications and application
The use of aluminum tubes is associated with the technical characteristics that this metal possesses.
VHF antenna from a tube
Resistant to corrosion in air. An oxide film is formed on the surface of the metal, which does not allow oxygen to penetrate and prevents oxidation. Stability in aggressive environments. Low density (3 times lighter than steel, 3.3 times lighter than copper). High thermal conductivity (4 times higher than steel, but almost 2 times lower than copper).
Due to these properties, aluminum tubes of small diameters are successfully used in the following industries:
aviation industry;
space technologies;
mechanical engineering;
automotive industry;
chemical production;
processing of oil products;
furniture industry;
production of electrical, cryogenic, heat exchange and climatic equipment;
production of sports equipment, greenhouses and household goods.
From aluminum pipes with diameters of 4, 5, 6, 7, 8 mm, home craftsmen make radio-controlled aircraft, aircraft models, and television and radio antennas. Corrugated flexible tubes are used as air ducts, and telescopic tubes are used in equipment that needs parts of variable length.
Working with aluminum tubes
Appliance repairs, car tuning, or technical creativity may require joining, soldering, or bending aluminum tubing.
How to connect two aluminum tubes
Two aluminum tubes can be soldered together. To do this, you need a gas burner, solder and flux. Some solders do not require the use of fluxes. Imported manufacturers of solders and fluxes on the market: Castolin, France; Chemet, Germany; Harris (USA); La-Co, USA; Rexant, China. Domestic manufacturers produce products according to TU 48-0220-62-94.
For different solders and fluxes, the algorithm may be slightly different, but the general order is as follows:
Thoroughly clean the surface Apply flux (if required) to the edges of both tubes. Heat the soldering point to the required temperature (depending on the flux and solder). You can determine the required temperature visually by melting solder and bubbling flux.
Attention! Do not point the flame of the burner at the flux!
Connect the joints by soldering the seam. Cool and clean the surface of flux residues.
In the same way, you can act when the question arises: how to solder an aluminum tube.
How to bend aluminum tube
For bending tubes of small diameters (up to 20 mm), the workpiece is not preheated, and the process itself is most often carried out using:
manual pipe bender by hauling;
internal spring for bending.
In the latter case, a special spring is inserted into the tube to the place of the bend. The pipe is manually bent to the desired angle and the spring supporting the pipe walls during the process is removed.
Pipe bending springs – internal and external
Choosing the right type of aluminum tubes and properly working with them, you can be sure of long-term and trouble-free operation.
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