The Brazing Process – Six Basic Steps

  1. GOOD FIT AND PROPER CLEARANCE. The best clearance between the two metal parts being brazed is a close one – usually .
  2. CLEANING THE METALS.
  3. FLUXING THE PARTS.
  4. ASSEMBLE FOR BRAZING.
  5. BRAZING THE ASSEMBLY.
  6. CLEANING THE BRAZED JOINT.

What is copper tube brazing?

The use of copper brazing is for when greater joint strength is needed or for systems that operate at 350 degrees or higher. Typical uses include: Fire protection. Air-conditioning and refrigeration.

Do you need flux to braze copper?

However, in copper to copper applications, the phosphorus in BCuP alloys acts as the fluxing agent. No additional flux is needed, although a small amount of flux may be used for applications with prolonged heating times to improve the wetting action of the filler metal.

What is required for brazing?

Parts must be very clean, gas must be pure. For copper, silver, nickel, copper-phosphorus and copper-zinc filler metals. For brazing copper, brass, nickel alloys, Monel, medium and high carbon steels chromium alloys, titanium, zirconium, hafnium.

Do you need flux for brazing copper?

Remember that copper to copper brazing does not require a flux. Here are a few common combinations: Using Stay-Brite® Solder – Stay-Clean® Soldering Fluxes.

Do you need flux when brazing copper to copper?

Your flux needs to be active at the same temperature as your consumable alloy. Harris alloys have recommended alloy selections, and a complete guide is included in the Guide to Brazing and Soldering on our website. Remember that copper to copper brazing does not require a flux.

Can you braze copper with a propane torch?

You’ll use a torch for brazing just as for soldering. Because brazing involves higher temperatures than soldering, using an oxygen-acetylene torch is your surest bet because this gets hotter than a MAPP gas or propane torch, although for most small-to-medium jobs (thinner copper piping) a turbo torch should also work.

Can You braze copper pipe?

Technically, it is possible to braze wet copper pipe, however, the chances of problems are much greater. You should always try to avoid brazing or soldering anything that’s wet, dirty or has grease on it. Solder is a type of metal with a fairly low melting temperature.

How to braze AC lines?

Begin by heating the tube. Heat around the tube to conduct heat inside the coupling.

  • After this preheat,move the torch to the coupling. Angle the flame towards the tube.
  • Sweep the torch between the tube and coupling to bring both parts to brazing temperature.
  • Move the flame towards the coupling base and apply filler metal.

    • What is pipe brazing?

    Brazing Copper Pipe. Brazing copper pipe has been, for many years, one of the most common methods of connecting copper tube and fitting. This method is especially useful when great joint strength is needed. Typically, great joint strength is needed for systems operating at 350 degrees and above.