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"   Although the words &amp;quot;pipe&amp;quot; and &amp;quot;tubing&amp;quot; are often used interchangeably, they are not synonymous. A pipe is a cylinder that is joined to another cylinder with threaded fittings or slide-fit joints. It has a thick wall. In residential applications, pipe may be made from copper, cast iron, steel or plastic. In commercial applications, it may even be made of concrete. Tubing, in contrast, is thin-walled and may be rigid or flexible. It is also distinguished by slide-fit, not threaded, joints.   CUT   Tighten a tubing cutter onto the pipe and turn it.  REAM   Scrape away burrs.  CLEAN   Polish mating parts.  FLUX   Brush flux on the abraded surfaces, assemble the pieces and heat the joint.  SOLDER   The copper shines as the flux melts, and dulls as the flux sizzles and smokes. Move the flame away and move lead-free solder from the bottom to the top of the joint. The solder will wick in. For a vertical joint, move the solder around the joint&amp;#039;s circumference. Clean the joint by applying flux while the copper is still warm, then wipe thoroughly with a clean rag. "^^<http://www.w3.org/2001/XMLSchema#string>
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