Installation without problems: the metal press systems

Why is this solution when installing plumbing and heating systems can be considered optimal

In the fifties of the last century Swedish engineer Gunnar Larsson has developed a press fittings made of steel and copper. The first generation of press connection has been profiled socket with O-ring inside. End fitting with socket donned on the prepared metal tube and made crimp press tool to obtain a tight connection.

The new system was accepted by the professional community installers as a breakthrough: on the one hand, it's really simple technology, on the other hand, it connected the pipe quickly and superreliable. it came very late, but in a much more perfect in our country form. Technology instantly became the leader in the market, winning the trust of professionals and consumers.

In this article, with the help of a specialist company Viega we will tell about the peculiarities of the metal press systems, are most interested in FORUMHOUSE participants.

Content:

• Osobennosti metal press systems
• Advantages of the metal press systems over plastic
• Installation of the system: the procedure works

Features metal press systems

Metal press systems It consists of pipes, fittings and innovative special press tool for assembly. It is universal, as it can be used in systems for heating and for water supply. The sealing rings and sleeve are absent in the system; for fast and reliable crimp connections provided safety circuitry. They can detect Unpressed fittings at the first check for leaks. The compound was prepared one hundred percent reliable and durable - manufacturers guarantee the life of at least 50 years.

Due to the absence of sealing rings and the inner rounding radius of the large diameter of the passage section is not narrowed, and a water head remains strong even in the junctions and bends.

Since the installation of the system eliminates a lot of extra and time-consuming operations (calibration pipe and Additional fitting diameters, install the O-rings in the fittings, and so on. p.), installation time is reduced almost a third.

Water supply system with press fittings

Member FORUMHOUSE with the nickname Stan_1 personally mounted the water system of the press fittings with stainless steel tubes and came to two conclusions:

• It's really expensive (due to instrument purchases, but pay a specialist would be even more expensive).
• If he would have to mount the water, he will once again select "press-fitting", which excels in all things welding. And not only in the ease of installation.

Sergey Vitreshko

Chief Technical Officer of the company Viega, Russia and CIS countries

In welding the resulting weld seam is the most vulnerable point for the hearth corrosion since metal structure reverses. Besides, the quality of welding is directly dependent on the human factor, in contrast to the use of metal press systems. The modern method of joining metal pipes requires high qualification of the installer, and all kinds of work can be done without compromising the quality of the system and without the use of an open flame.

Crimp such connections require a lot of effort, so use an electrical press tool for him.

Stan_1

user FORUMHOUSE

Despite the high price, its purchase is justified as the master service that will do, "the press-copper" or "press-stainless" will cost more.

The procedure works:

When installing the following conditions must be met:

• smoothly cut the desired length of the pipe;
• remove burrs from inside and outside the tube;
• check the O-ring inside the fitting;
• note insertion depth of the pipe in the fitting;
• insert the tube into the fitting up to the mark;
•  pressurize the fitting;
• inspect the resulting compound.

The choice of fastening systems

Before you stop the selection on the stainless steel press fittings, our user with meticulous scientist analyzed available on the market materials and fastening systems.

When choosing a mounting system there was no doubt at all:

Stan_1

Crimping press nuts and brazing does not suit me because the quality of the connection depends on the qualifications of the employee, and may even have one person to differ materially. We need a method that eliminates the need for unskilled labor. Press fittings satisfy these requirements. There's the right thing to do the segment, and after that all the equipment she would do with the stability of the robot.

As our expert technology of pressing joints of metal pipelines devoid of all the drawbacks of welding.

Sergey Vitreshko

First, it allows you to completely abandon the use of open fire, which provides fire safety and cleanliness. Second, the process becomes a robot, that is, does not require high qualifications of installers, that greatly simplifies the installation without compromising the quality of work performed. Third, the service life is guaranteed for at least 50 years, and service life can be increased for particularly important facilities. Plus, when the press connections, unlike welding, greatly reduced one of the most valuable resource - time.

As for materials, the metal-base has been rejected due to the unreliability and the need for a polypropylene installation was soldering and soldering skills.

Sergey Vitreshko

Plastic has a limit range of operating characteristics specified in IEC 52134 / EN ISO 21003. Performance data for the heating systems are listed in the class operation number 5, for water - in a class №2. Operating temperature is limited in accordance with the GOST, a working pressure should not exceed 10 bar. The advantage of the metal systems is that they allow for a maximum working C over the entire lifetime -50 pressure of 16 bar and a maximum operating temperature of 110 years old. It is worth adding that the linear expansion coefficient is much higher than in plastic systems, than the metal press systems, which requires a more careful approach to the installation and the adoption of measures to compensate for the heat extensions.

Thus, the choice was between "the press-copper" and "press-stainless".

Copper. There were doubts in ecology of this material for plumbing, confused as a large thermal expansion that not good for immured tubing and videos on the Internet, in which as copper exposed Corrosion.

But, most likely, in the trailers has been shown not corrosion:

Sergey Vitreshko

The color change to a dark pipe does not always imply the corrosion process. The fact that the natural properties of copper - a process of patination. Education patina on copper surfaces a protective coating, which is not to be feared. The only essential point is to use copper pH value pH, which must not fall below the value 7.4. If it is lower, the protective patina layer begins to break down, leading to a thinning of the copper layer and exit from the system system. Accordingly, if the water to make the chemical analysis and to identify the allowable pH level, then copper will be the optimal solution for heating systems and water supply.

Stainless steel. The material hardly susceptible to aging and to thermal expansion. Extremely durable, slightly corroded. Not harmful when used in the water. The strength of the material allows to make tubes with thin walls.

User FORUMHOUSE c nickname Autolife faced with a vexing problem - flowed joints in the heating system. Change the pipe is expensive, and I want to do something with the connections: cut compression fittings and install in their place a press fittings. But here there is often asked to FORUMHOUSE question: how to behave BU pipe with press connection?

Sergey Vitreshko

If the pipe corresponds to GOST 3562-75 * and all the layers of the outer cover removed, the installation of our fittings Megapress (with our other tube fittings BU is not compatible) does not cause any problems. Only if the pipeline system had been installed and its service life is coming to an end, then at the time of cutting of the pipe it becomes noticeable. As a rule, there is only need replacing this section of pipe.

Sometimes the anxiety of consumers and professional installers is quality fittings - whether they have sufficient wall thickness? If you win, then, after some time can burst part of the thread. I do not want to run into a fake!
Our expert believes that this is possible.

Sergey Vitreshko

To date, the sale of counterfeit products of our company in Russia has not been established. It is necessary for the production of high-tech and expensive equipment, in addition, products made of the highest German quality materials. These two components are interconnected and rule out the possibility of counterfeiting.

Summarizing

When choosing a method for compound press connection technology using a press-fitting at the moment is the best solution.

The main advantages of the metal press systems:

• press connection reliability of metal piping system is higher than that of similar welding system;
• service life at least 50 years;
• cost of the system is not critical because of the high assembly speed, safety and time savings significantly;
• neat and aesthetic appearance;

Sergey Vitreshko

This method involves minimizing the human factor and does not require high skills from the installers. This ensures system reliability without compromising on quality, simplicity and high speed of installation, aesthetic appearance and durability guarantee at least 50 years. All press connections are equipped with the patented safety technology SC-Contur, which guarantees full security after installation.

On FORUMHOUSE can read more about the economic communication without threaded fittings and time-consuming soldering the design engineering services in a private homediscuss copper pipes and their application.

Watch our video on how to spend engineering Communication in a large cottage.

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