28 mm coupling - thin-walled galvanized carbon steel crimped PC5270 0280000

Application and Characteristics of the Press-Fit Coupling

This component is used to connect steel pipes in installations where a welding-free or threading-free assembly method is required. Thanks to the press-fitting technology, the connection is made quickly and repeatably, which is crucial when working in hard-to-reach locations or with large quantities of fittings. The 28 mm coupling, made of carbon steel, features a thin-walled construction, allowing for material savings while maintaining adequate mechanical strength.

It is worth noting that the product includes a stop collar. This structural element not only facilitates pipe centering during installation but also provides visual and physical control over the insertion depth before the actual crimping. This ensures the installer that the pipe has been inserted to the full depth, which is a necessary condition for achieving a leak-tight connection.

Material and Resistance to Operating Conditions

The primary material is alloy (carbon) steel, which after surface treatment receives an electroplated zinc coating. Such a coating protects against corrosion in environments of moderate aggressiveness, typical for water supply or heating installations. However, it should be noted that the product does not carry UL or FM certifications, meaning its use in specific industrial installations with heightened safety requirements (e.g., in explosion-hazardous zones) requires individual verification of compliance with local standards.

The coupling is designed for operation at a working pressure of up to 16 bar at 20°C. This is a standard parameter for many sanitary and industrial installations. The absence of seals within the coupling structure itself means that leak-tightness depends solely on the properly executed metal-to-metal connection and the quality of the crimp. In applications requiring seals (e.g., medical gases), it must be ensured that the press-fitting system uses appropriate dies and procedures for the given medium.

Construction and Key Dimensions

The product has a simple shape and is manufactured as a single-piece component, eliminating the risk of play resulting from multi-component assembly. Its total length is 58 mm, with an outer diameter of 28 mm on both sides of the connection. This construction ensures that the coupling does not reduce the pipe diameter – it is a standard straight coupling joining two pipe sections of identical cross-section. The external surface is protected by electroplated zinc, while the interior remains in the raw (steel) state, which is standard for this type of steel fitting.

Installation requires the use of a dedicated hydraulic or manual press tool for the press-fitting system for steel pipes with a diameter of 28 mm. The process involves inserting the pipes from both sides of the coupling until they stop against the collar, followed by performing a single crimping cycle. Thanks to its single-chamber construction and the absence of moving parts (such as valves or air vents), the coupling is a durable and maintenance-free component once installed. This is a universal solution – it performs well both in new building installations and during modernizations of existing steel pipeline networks.