Raccord de réduction 28x15 - acier carbone galvanisé à paroi mince à sertir PC5243 0281500

Application and Construction of the Reducing Coupling

This component from the series of press-fitted steel fittings is designed for connecting pipes of different diameters in gas and water installations where tightness and mechanical strength are required. The main function of this coupling is to provide a smooth transition between a pipe with an outer diameter of 28 mm and a pipe with a diameter of 15 mm. Thanks to the use of press-fitting technology, installation is carried out without the need for welding or threaded connections, significantly accelerating the installer's work and eliminating the risk of errors resulting from improper tightening of the joint.

The construction is based on a thin-walled profile made of carbon steel, which has undergone galvanic zinc coating. Such surface treatment provides protection against corrosion under standard conditions, which is crucial for long-term operation inside buildings. The component features a stop flange that facilitates pipe centering during installation and ensures the correct position of the pressing head. The entire assembly is manufactured as a one-piece model, resulting in fewer potential leak points compared to multi-piece solutions.

Key Technical Features and Operating Conditions

It is important to note the connection specifications: one side is a crimped socket (for a 28 mm pipe), and the other is a push-in end (for a 15 mm pipe). Both sides are prepared for press-fitting installation, requiring the use of a pressing head specifically dedicated to galvanized steel. The alloyed steel material guarantees appropriate hardness and resistance to deformation during the pressing process.

This component is designed for operation at a working pressure of up to 16 bar at a temperature of 20°C. This means it is suitable for most standard low-pressure gas installations and water supply systems where extreme thermal or pressure fluctuations do not occur. The product complies with European standards for steel fittings used in installation systems.

For precise installation planning, it is worth noting that the coupling has a total length of 68 mm, allowing estimation of the space required for installation in tight areas. The core material is carbon or alloy steel, protected by a galvanic or electrolytic zinc coating, and the connection type is a press-fitting system. All these parameters influence durability and the method of integration with the rest of the piping system.

Installation and Practical Aspects of Use

For the installer, ease of dimension identification is crucial – the difference between diameters of 28 mm and 15 mm is clearly visible, minimizing the risk of selecting the wrong fitting on-site. The stop flange acts as a physical stop for the pipe, facilitating uniform compression during pressing. It should be noted that the sealing material is EPDM rubber (ethylene-propylene-diene), characterized by good resistance to aging and exposure to various media, although in the case of gas installations, it is always advisable to verify compliance with local regulations regarding gaskets for the specific type of installation.

The product does not have a drain valve or air vent – it serves solely as a connecting and reducing element. Its one-piece construction means that after press-fitting, it becomes an integral part of the installation, requiring no additional maintenance or tightening in the future. A weight of approximately 55 grams makes the component lightweight and easy to transport and handle at heights or in hard-to-reach installation areas. Thanks to the electrolytic zinc coating, the surface is smooth, facilitating pipe cleaning before installation – crucial for the tightness of the press-fitted connection.