In large diameters or small, for liquid or gas, for high- or low-pressure systems under a wide range of temperatures, you can depend on copper and reduce costs for any mechanical system.
Standardize on copper for superior performance throughout the job. Copper is easy to work and has excellent thermal conductivity, corrosion resistance and durability. It is available in two basic types of tube—plumbing tube and air conditioning/refrigeration (ACR) tube, and in both drawn (hard) and annealed (soft) tempers. Copper tubing is also available in a wide range of diameters (from 1/8 inch to 12 inches) and wall thicknesses. Fittings to suit every design application are readily obtained.
Variety of Applications
In mechanical systems of all kinds, copper does more than ever before. Today copper tube has proven superior for:
- Underground water and gas services
- Water distribution systems
- Chilled water mains
- Drainage and vent systems
- Heating systems (including solar)
- Fuel-oil systems
- Oxygen systems
- Non-flammable medical-gas systems
Moreover, copper is durable enough to embed in concrete without worry.
Wide Range of Sizes
Large diameter or small, there is a copper tube to fit every specification. Forced-circulation hot water heating systems use small and economical tube sizes with soldered joints and require less space for installation. In drainage systems, Type DWV tube has been used successfully for many years. Large-diameter tube, joined by soldering or brazing, is cost-effective for water distribution and for fire-protection risers in multistory buildings. Copper’s superior hydraulic-flow characteristics permit precise tube and pump sizing.
It is good engineering practice to use one material for all components throughout a mechanical system. The more copper used in an installation, the more you can count on dependable performance. Copper is known for its reliability. It has been used for plumbing and mechanical systems since metals were first employed in these applications. And its popularity in heating systems is a further indication of copper’s superiority to alternative materials.
Long Lasting and Maintenance Free
Copper has stood the test of time to earn customer satisfaction and wide code acceptance. Copper, used for centuries, has gained new popularity in its modern form: light, strong, corrosion-resistant tube. Its long-lasting and maintenance-free characteristics make copper the leading choice for plumbing, heating, cooling and other mechanical systems. Copper never requires painting for protection from corrosion. In addition, a thin film forms inside the tube, providing natural protection from corrosion. Copper’s trouble-free service means satisfied customers. And its universal acceptability assures compliance with major building codes. Copper is safe, too. It will not burn or support combustion. So it will not carry fire through floors, walls and ceilings, and it will not decompose into toxic gases.
Copper’s excellent corrosion resistance is an important reason for its choice in so many applications. Solar energy systems, for example, benefit from copper’s resistance to both atmospheric and aqueous corrosion. For water distribution and fire sprinkler systems, copper tube’s internal corrosion resistance results in superior flow capacity. When calculating flow capacities, other plumbing materials require additional allowances for corrosion, scaling, out-of-roundness and smaller internal diameter when compared size-to-size with copper. Copper tube bores remain smooth, and internal diameters stay constant. Largely because of this, a copper fire sprinkler system can use smaller diameters to provide the same sprinkler coverage as a steel system—with significant savings in installed costs.
High Thermal Conductivity
Copper conducts heat up to eight times better than other metals. In any application involving heat transfer—from radiant heating to snow melting to direct exchange, geothermal pump systems—copper’s high thermal conductivity provides an advantage. Comparing copper, aluminum and steel, copper is by far the best conductor of heat. In solar energy systems, copper’s superior thermal conductivity means that thinner copper sheet can collect the same heat as a much thicker-gauge sheet of aluminum or steel. And it means that copper collector tubes can be more widely spaced.
Easy to Join and Install
Copper adds to system integrity while lowering installation costs. Copper’s workability can cut installation time and reduce labor cost. Tubes and fitting are easily joined metallurgically by soldering or brazing. And copper is so ductile that it can be formed—frequently right on the job site—to fit most design configurations. Because of copper’s formability, it is often possible to eliminate elbows and joints. Since copper is rigid as well as readily formable, it adds to total system integrity even when subjected to adverse conditions.
An Abundant Resource
The total of U.S. resources far exceeds the country’s requirements. At present use rates, we still have reserves waiting to be mined that are plentiful enough to last thousands of years. In addition, there’s another naturally occurring advantage that no other metal can match: ease of recycling. Almost half the copper used in this country comes from recycled scrap, which can be used over and over again. This copper recovered from scrap is as usable as primary copper refined from ore. Combining natural abundance with recycling, the USA will remain self-sufficient in copper for countless years to come.
courtesy of http://www.copper.org/applications/plumbing/benefits/benefits_main.html