Butt-weld Coupling Margo MUFA SP 65 for pipe DN 65 (2 1/2")

The Margo MUFA SP 65 butt-weld coupling is designed for joining pipes with a nominal diameter DN 65 (2 1/2"). Intended for permanent welded connections, this coupling enables a continuous pipeline without threaded or flanged joints. It is suitable for applications requiring pressure-tight, durable welded seams and is compatible with common welding installation methods used in plumbing, HVAC, industrial piping and hydraulic systems.

Advantages

The butt-weld coupling provides a smooth internal bore at the joint, reducing flow resistance and minimizing turbulence. Its welded connection type ensures a permanent, low-leakage joint with high mechanical strength and resistance to vibrational and thermal stresses. The simple cylindrical design allows for straightforward alignment and welding on-site or in workshop conditions.

Suitable for

• Permanent welded pipelines in plumbing and water supply systems
• Heating, ventilation and air conditioning (HVAC) installations
• Industrial process piping where welded joints are required
• Hydraulic systems and high-pressure lines that use welded connections

When it may not be suitable

This coupling is not intended for use where demountable or frequently disassembled connections are required, such as maintenance-heavy assemblies that rely on flanges or threaded fittings. It may also be unsuitable where welding is restricted or not permitted due to site safety rules, combustible surroundings or specific material compatibility issues.

Key specifications

• Nominal diameter: DN 65 (2 1/2")
• Connection type: butt-weld (permanent welded joint)
• Shape: cylindrical coupling for end-to-end pipe welding
• Typical applications: plumbing, HVAC, industrial and hydraulic piping

How to use

Prepare the pipe ends by cutting square and cleaning to remove scale, rust and contaminants. Align the pipes to ensure concentricity and the correct gap for welding practice used. Perform welding according to the appropriate procedure for the pipe material and wall thickness, using qualified welding methods and welders. After welding, inspect the seam visually and with appropriate non-destructive testing if required, and apply corrosion protection or coatings as specified for the system.

What to consider before purchase

• Confirm compatibility with the pipe material and wall thickness to be welded
• Ensure onsite or workshop capabilities for the required welding method and qualified personnel
• Check system pressure and temperature requirements to ensure welded joints meet operational conditions
• Verify whether corrosion protection or post-weld treatments will be necessary

Usage recommendations

Use standard welding procedures that match the pipe material and follow applicable codes and safety regulations. For pressure systems, perform post-weld inspection and pressure testing as required to confirm joint integrity before commissioning.