The seamless tube is interchangeable
Steel is an alloy and consists mostly of iron with carbon. Although carbon is most cost-effective alloy material, various other alloying elements are also used, including manganese, vanadium, chromium, and tungsten. These alloying elements harden the iron and varying amounts of these alloying elements determines qualities such as the ductility, hardness, and tensile strength of steel. Steel is the most common material in the world today and it is a major component in infrastructure and buildings as Steel Pipes and Steel Tubes, tools made from Steel, in ships, machines, automobiles, and appliances.
A pipe in general terms is a hollow cylinder or tube and is used to carry or convey materials but is also used as a component in structures. The seamless tube is interchangeable and a pipe is generally referred by its internal diameter, while a tube is generally defined by its external diameter. Steel Pipes and Steel Tubes have many uses and are used for Domestic Water Systems for carrying water to Homes and offices, as part of indoor plumbing. Huge and extensive steel pipelines are also used for transporting gas and water to cities and facilities far away from the source. Some pipelines are also used to transport other liquids and chemicals to and from facilities, internally and externally. Pipelines are also used to transport sewage, slurry, and even beer, but the most important uses for Steel pipes are to transport water for domestic use, oil and natural gas.
Besides transporting materials, Boiler tubes are also used as scaffolding to support people and materials in construction and repair of office buildings, homes, and other structures. Steel Pipes and Steel Tubes are also used as components in mechanical systems as Rollers in conveyor belts, Compactors, as casing in constructions for concrete pilings, Pressure manufacturing processes, High temperature manufacturing processes, Casings for Oil wells, Oil refining equipment, etc. Pipes and tubes are available in different diameters, sizes, tensile strength, lengths, etc. Depending on the use, pipes and tubes can also be custom manufactured, as they are for the oil and gas industry. For domestic and industrial use, pipes and tubes are sold through distributors and traders.
Pipes and tubes for general use in industry and homes can be bought directly from pipe distributors and traders who stock different sizes and diameters of carbon steel pipe. Steel pipes have been manufactured for over 150 years and pipe sizes used today in galvanized and PVC pipes were designed for steel pipes years ago. The numbering system – Sch 40, 80, 160 was set a long time ago and seems a bit odd, as Sch 40 is thicker than Sch 1120, but with the same outer diameter. While these pipe sizes have been based on the old sizes, there are other pipes like the gold flow cpvc size for heated water that uses sizes, internal and external, based on the old copper size standards. There are so many uses of pipes and tubes and they are manufactured in so many sizes, diameters, and qualities that it has become an indispensable part of daily life.
Source from http://hbhuike.spruz.com/pt/The-seamless-tube-is-interchangeable.7-18-2012/blog.htm
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