Copper Pipe usage is common in the domestic applications. Water pipes have replaced copper for steel for a long time now. With the development of technology, there are new methods and materials that are used in the piping practices as well. Copper is no exception, there are standards and grades as well. The VRV/VRF applications require very high temperature and pressure tolerance. So the pipes that are used in these systems must meet the requirements. Also the refrigerators and other equipment that have to be CFC free use the copper pipe with different configurations. There are different standardizations of copper pipes such as the JIS H3300, ASTM B280, BS: EN 1057, BS 2871 and EN 13348. These numbers correspond to specific characteristics of the standard of copper.
The strength, look and weldability could be determined by the method of production of these pipes. There are cold drawn copper seamless pipe and the hot rolled pipes. The seamless pipes are used in more precision demanding applications where the welded ones have higher roughness. On the other hand, the welded ones are a bit stronger than the seamless ones because of the welded and hot rolled procedures. The different types include type K, L, M and DWV. These grades are indicated by colors as well. The use of type L is common for water applications. The pricing of type M copper pipe is usually lower than the type L. Therefore type M is used as a replacement to type L in times where cost is the primary concern.