Trade Terms
Any refrigerant containing carbon and one or more halogens, such as chlorine or fluorine. HCFC-22 contains chlorine, making it a halocarbon.
Halocarbon
Green
Type K
45° angle
Flare Fittng
Measure twice
cut once
This gas is used for pressure testing.
Nitrogen
Heat-treated to soften a metal, making it softer and more formable
Annealed
Blue (required)
Type L
Expanded tubing
Swaged
Cutting this way will create a weak joint.
Too short
Hand-in-hand with temperature change.
What is pressure change?
Components that have been coated or covered with a thin copper layer.
Copper-clad
Blue (not required)
Type ACR
A depth gauge is required to place the witness mark.
Push-to-connect fittings
This type of copper tubing needs more accuracy.
Hard-drawn copper
2,000 PSIG
Nitrogen tanks are charged to...….
Describes plastic materials that become more plastic (elastic) when heated and harden again when cooled, and can generally do so repeatedly.
Thermoplastic
Red
Type M
Align the jaws of the tool on the fitting, ensuring they stay square with the fitting.
Press-to-connect fitting
Measure, then add the socket depth x 2
Face-to-face Distance
You should never exceed this when pressure testing.
What is the lowest-rated component in the system?
Breaking what would usually be a 90-degree angle to create a symmetrical angled surface on an edge. Also used as a noun, as a name for the angled edge.
Chamfer
Yellow
DWV
One full turn after the nut is finger tight is usually sufficient for a leak-free joint.
Compression joint
When using back-to-back distance, this must be subtracted.
The length of the fitting.
1 or 2 PSI above the test pressure.
What do you set the relief valve to open at?