Copper pipes are widely used in plumbing and HVAC (heating, ventilation, and air conditioning) systems due to their excellent thermal conductivity, corrosion resistance, and ductility. They are available in various sizes and shapes, including round, square, and rectangular tubes. Copper pipes can be joined using soldering or brazing techniques, which create strong and reliable connections.

Here are some common applications of copper pipes:

1. Plumbing: Copper pipes are commonly used for water supply lines, both hot and cold. They are also suitable for gas distribution systems.
2. Heating: Copper pipes are often used in radiant heating systems, where they carry hot water or steam under floors or within walls to provide warmth.
3. Air Conditioning: In HVAC systems, copper pipes transport refrigerant between the compressor, condenser, evaporator, and expansion valve.
4. Refrigeration: Copper is an ideal material for refrigeration systems because it has a low coefficient of thermal expansion, which helps prevent leaks and damage from vibration.
5. Electrical: Copper tubing can be used as conduit for electrical wiring, providing protection against damage and environmental factors.
6. Medical Gas Systems: Copper pipes are used in medical gas systems, such as oxygen and nitrous oxide delivery networks, due to their reliability and safety.
7. Fire Sprinkler Systems: Copper piping is frequently employed in fire sprinkler systems because it does not corrode easily and provides a long service life.
8. Automotive: Copper tubes are used in automotive cooling systems, fuel lines, and brake lines.
9. Solar Thermal Applications: Copper pipes are used in solar thermal collectors to transfer heat from the collector to the storage tank or directly to the building's heating system.