Copper-brazed steel fitting SANHA SANHA-THERM C-Stahl d15 (15 mm)

SANHA-THERM C-Stahl d15 (15 mm) is a copper-brazed steel fitting designed for joining steel piping in heating, hot-water and plumbing installations. The fitting features a brazed copper surface that improves wettability for soldering and provides increased corrosion resistance compared with plain steel. It is intended for metal-to-metal connections in residential and commercial HVAC and hot-water circuits where a durable, mechanically robust joint is required.

Advantages

The copper-brazed finish ensures reliable capillary flow of solder and supports leak-free joints when correctly installed. The steel body delivers mechanical strength and dimensional stability under typical operating temperatures and pressures found in heating systems. The combination of copper brazing and steel construction provides improved corrosion protection and good thermal conductivity, making the fitting suitable for mixed-system installations where long service life and secure connections are needed.

Suitable for

• Joining steel pipes in residential and commercial heating systems
• Hot-water circulation and plumbing circuits
• HVAC installations requiring durable metal-to-metal connections
• Retrofit and new-build applications where brazed joints are specified

Key specifications

• Nominal size: 15 mm (d15)
• Material: steel body with copper-brazed surface
• Connection type: brazed/soldered joint
• Typical use: heating and hot-water piping systems
• Compatibility: suitable for standard steel piping of matching nominal size

How to use

Prepare mating pipe ends by cutting square and removing scale, rust and oil to ensure full contact. Fit the SANHA-THERM C-Stahl d15 fitting onto the prepared steel pipe and apply appropriate flux for copper-brazed joints if required by local practice. Heat the joint evenly to the correct brazing temperature and feed suitable brazing filler material until a continuous capillary fillet appears around the joint. Allow the assembly to cool naturally and inspect the joint for proper fill and absence of defects before pressure testing in accordance with applicable codes.

Usage recommendations

Use only approved brazing alloys and certified procedures that comply with local standards. Ensure compatibility with system fluids and operating temperatures. Where corrosion protection beyond copper brazing is required, consider additional protective measures or consult technical specifications for the complete system.