Whats the difference between pipe, tube and flexible hose?
Rigid Metallic Pipe is the most common means of transporting a fluid. Dimensional standards exist for Pipe, but they are refered to in nominal sizes, as an example 2 inches, where neither the interior nor exterior dimensions is actually 2″. In the USA, the I.D. (Inside Diameter) of the most common pressure class standard (schedule 40) is somewhat close to the nominal size. In the USA the O.D. (Outside Diameter) of the all the various pressure classes of pipe are the same. That means the O.D of Schedule 40 is the same as schedule 80, and they can use the same standard thread. British standards for pipe (and thread) vary from those used in the USA. Metric Pipe and thread standards also exist. Fittings are generally attached by welding or threading Rigid and Flexible Plastic pipes also exist, but their pressure and temperature ratings, are lower than those for Metallic Pipes. Bendable Metallic Tubing is widely used in plumbing, hydraulics and automotive applications. It is usually based u
