Uses of pipes - from Wikipedia
Pipelines transporting gas or liquid over long distances
As components in mechanical systems such as:
Rollers in conveyor belts
Compactors (e.g.: steam rollers)
Casing for concrete pilings used in construction projects
High temperature or pressure manufacturing processes
The petroleum industry:
Oil well casing
Oil refinery equipment
Delivery of fluids, either gaseous or liquid, in a process plant from one point to another point in the process
Delivery of bulk solids, in a food or process plant from one point to another point in the process
The construction of high pressure storage vessels (note that large pressure vessels are constructed from plate, not pipe owing to their wall thickness and size).
Surely anyone kitchen sink once struggled with the problem of the obstruction. The most common cause water in such devices is the clogging of the trap by the crumbs or simply by fat. When household cleaning siphon ways fail, then we are forced to enlist the help of a plumber. It will be able to use more specialized ways of cleaning the siphon. Sometimes, however, it appears that the trap must be replaced with a new one, fortunately his undoing and the exchange will not be a big problem for a plumber. It will only have to remember the spin valve with water when replacing the siphon. Similarly, in case of replacing the whole sink to a new, although longer carry it out a bit more complicated.
Pipe installation is often more expensive than the material and a variety of specialized tools, techniques, and parts have been developed to assist this. Pipe is usually delivered to a customer or jobsite as either "sticks" or lengths of pipe (typically 20 feet, called single random length) or they are prefabricated with elbows, tees and valves into a prefabricated pipe spool A pipe spool is a piece of pre-assembled pipe and fittings, usually prepared in a shop so that installation on the construction site can be more efficient.. Typically, pipe smaller than 2.0 inch are not pre-fabricated. The pipe spools are usually tagged with a bar code and the ends are capped (plastic) for protection. The pipe and pipe spools are delivered to a warehouse on a large commercial/industrial job and they may be held indoors or in a gridded laydown yard. The pipe or pipe spool is retrieved, staged, rigged, and then lifted into place. On large process jobs the lift is made using cranes and hoist and other material lifts. They are typically temporarily supported in the steel structure using beam clamps, straps, and small hoists until the Pipe Supports are attached or otherwise secured.
An example of a tool used for installation for a small plumbing pipe (threaded ends) is the pipe wrench. Small pipe is typically not heavy and can be lifted into place by the installation craft laborer. However, during a plant outage or shutdown, the small (small bore) pipe may also be pre-fabricated to expedite installation during the outage. After the pipe is installed it will be tested for leaks. Before testing it may need to be cleaned by blowing air or steam or flushing with a liquid.