Cast and Wrought Alloy Copper Fittings
Cast alloy pressure fittings come in standard tube sizes with limited variety for plumbing systems. They can be brazed with utmost care or soldered. Wrought copper pressure fittings come in varying types and sizes. Brazing or soldering can also join them. When brazing is the method to be used in joining, then wrought copper is preferred. Nonetheless, the choice between wrought and cast copper fitting is purely the preference of the user.
Flared tube fittings offer metal-to-metal contact which can be separated and reassembled. They are preferred where soldering isn’t possible or when residual water cannot be eliminated from the tube. They are preferred where it is hazardous to use a torch for brazed or soldered joints. Moreover, it’s hard to solder under wet conditions hence flared, and press-connect joints are appropriate.
Solder Ring Copper Fittings and End Feed Copper Fittings
Solder ring copper fittings have a solder ring built into the fitting and melt at a temperature to join the pipe to the fitting. Solder rings are expensive compared to the end feed fittings, so for large projects, it is advisable to use end feed fittings. End feed fittings are only applicable when using a copper pipe. They are quite difficult to work with when compared to solder ring fittings.
Copper Fittings for Refrigeration Coils – Heat Exchanger
Refrigeration coils or a/c coils are manufactured to the mechanical and chemical test requirements of the ASTM B280.The standard requires a minimum of 99.9% copper plus silver content. The copper tube has to be free from any lead. The alloy used is C12200, these refrigeration fittings include in copper u bends, return bends, cross over fitting and cu tripods etc.

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