Can you silver solder refrigeration lines?

Soldering is a viable method of joining ACR tubing and components while servicing and installing refrigeration systems. However, not all types of solders can be used satisfactorily. Tin/lead and tin/antimony alloys are not normally recommended for our systems. There is one exception to the use of a tin/silver alloy.

Is silver brazing Food Safe?

45% flux coated silver brazing alloy for use on light gauge material and tight fitting joints. Excellent capillary flow on ferrous and non-ferrous metals or combinations of both (excluding white metals) Excellent for food processing or food handling equipment.

Can silver be brazed?

Silver brazing uses filler metals and alloys such as silver, copper, zinc, cadmium, etc. Flux is necessary for brazing to remove and prevent reformulation of surface oxides on the base metals. Silver brazing can be done on automatic machines for cost-efficient metal joining at high production rates.

Is brazing stronger than soldering?

It can be distinguished from soldering by temperature: in brazing the filler metal melts above 840 °F (450 °C). Because of the higher temperatures a brazed joint is stronger than a soldered joint.

Does silver solder contain cadmium?

Typically, 16-25% cadmium may be present in a cadmium-containing silver solder. Cadmium is a silver white ductile metal which melts at 320 °C and, when heated above this temperature in air, produces cadmium oxide fumes.

Does silver solder contain lead?

Lead-free solders in commercial use may contain tin, copper, silver, bismuth, indium, zinc, antimony, and traces of other metals. Most lead-free replacements for conventional 60/40 and 63/37 Sn-Pb solder have melting points from 50 to 200 °C higher, though there are also solders with much lower melting points.

What’s the percentage of silver in a brazing rod?

The most common rods used for typical HVAC brazing are 0%, 5%, and 15%, with several other levels mixed in there. The percentage is the percentage of silver content in the rod.

What should I use to braze a refrigeration line?

If you are brazing on a refrigeration or cooling system with costly components, it’s highly recommended to purge your lines with an “inert gas” such as argon or nitrogen. During the brazing process, a lot of oxidation will occur inside the pipe, creating scale that could potentially clog these costly components and even, void a warranty.

What do you use to braze copper HVACR pipes?

Brazing and Soldering Copper HVACR Pipe Refrigeration piping is always brazed as brazing makes a very solid leak-free joint that withstands high and low temperatures and pressures. Brazing is done with oxyacetylene for refrigeration and the oxyacetylene tanks should have pressure regulators for regulating proper pressures when brazing.

What should you know about soldering and brazing?

As always safety is first with anything. Two big considerations must be adhered to when soldering or brazing: Eye protection and burn protection for hot dripping soldering. Keep yourself safe when soldering or brazing. The inherent risk of using an open flame around combustible materials.