Margo welding coupling DN 50 (MUFA SP 50) for pipe connection

The Margo welding coupling DN 50 (MUFA SP 50) is a steel butt-weld fitting engineered for permanent pipe connections with a nominal diameter of 50 mm. Designed for in-line welding, this coupling provides a continuous, pressure-resistant joint suitable for water supply, heating circuits and industrial piping systems. The MUFA SP 50 is intended for applications where a welded connection is preferred over threaded or flanged joints to ensure strength, durability and leak-free performance under typical operating conditions.

Advantages

The MUFA SP 50 coupling offers a robust steel construction that enables a long service life when welded correctly. Its design simplifies alignment for butt welding, ensuring a smooth internal bore and minimal flow disturbance after installation. By creating a permanent welded joint, the fitting reduces maintenance needs and eliminates potential leak points associated with mechanical couplings or seals. The product is compatible with standard DN 50 piping and can be used in systems operating under routine temperature and pressure ranges common to water supply, heating and many industrial processes.

Suitable for

• Water supply pipelines with nominal diameter DN 50
• Heating systems and circulation loops
• Industrial process piping requiring welded joints
• Permanent installations where pressure-resistant connections are needed

Key specifications

• Material: steel construction suitable for welding
• Connection type: butt welding (in-line weld)
• Nominal diameter: DN 50 (50 mm)
• Application: pressure piping for water, heating and industrial systems
• Joint type: permanent welded coupling providing a continuous internal bore

How to use

Prepare pipe ends by cutting square and removing burrs, ensuring proper fit-up with the MUFA SP 50 coupling. Align pipes concentrically within the coupling and tack-weld to maintain position. Perform full circumferential butt welds according to relevant welding procedure specifications and standards for the pipe material. After welding, inspect welds visually and with non-destructive testing as required by project or regulatory standards, and remove any slag or spatter to restore a smooth internal and external surface.

Usage recommendations

Use certified welding procedures and qualified welders for installation. Select welding consumables and pre-/post-weld heat treatment based on the base material and operating conditions. Follow applicable codes and safety practices to ensure a pressure-resistant and durable joint; inspect welded connections before commissioning the system.