Pipe was initially made use of by the Romans to reticulate waters in Rome. It was made from lead as it was probably the most flexible metal available that would allow leak free conveyance of water. Strangely enough the Romans experienced little lead poisoning as the water they used was calcium rich which produced a protective deposit between pipe and drinking water.
Consequently pipe was created from numerous materials such as utilization of timber logs with a hole drilled through the log and enclosed in a long pipe with animal fat as water mains in Philadelphia. At present, pipe could possibly be manufactured from many different materials and to numerous specifications in accordance with the meant use, e.g. ceramics, fibreglass, metals, sturdy concrete and PVC. Lead is no longer allowed due to the high occurrence of lead poisoning, eventhough it was popular in older buildings. Pipe is tubular or a hollow cylinder of numerous manufactured length and many pipes may be linked together by the use of fittings and fastening materials. Pipe normally is the term for a solid and or rigorous construction while flexible piping is referred to as a hose, as with hosepipe. The biggest application of pipe is the conveyance of fluids or small solids, such as water, petroleum, gasses, sludge and so on. Pipe may also be used in construction such as scaffolding. The term 'tube' could also be used to describe pipe, but will generally be generated from a material which will allow bending or forming of the pipe (e.g. copper), whereas 'pipe' will make reference to solid lengths.
Pipe might be constructed from numerous materials determined by what the intended use of the pipe. Pipes of very large diameter are made of reinforced concrete for use for the conveyance of multitude of water, like storm water, or to be carried over distance, for example where water is taken from dams to irrigation schemes, or city reservoirs. Copper pipe or tube ordinarily have a thin 'skin' and is versatile and may be bent to go around corners and is generally employed in hot water applications. Pipe may be manufactured from such exotic materials as titanium where high pressure and high temperatures are involved. Aluminium, being lightweight is a popular material for the manufacture of irrigation piping which should be moveable over distances by manual labour. Pipe might also be manufactured from carbon steel, stainless-steel or galvanised steel depending on the application.
Of special importance to us in modern times is pipe made of PVC. Plastic pipe is widely used for its attributes of light weight, chemical resistance and non-corrosive properties. Additionally, it is easily transportable in either lengths or rolls of piping. PVC pipes are easily connected, usually by means of couplers or fixtures and an adhesive, but there are more simple ways available today as well. PVC pipes, nowadays, account for most pipes used in buried municipal uses for drinking water reticulation as well as wastewater or sewage removal. PVC, as it happens is not a modern-day discovery, but was first discovered in 1835 and yet again in 1872.
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