Pipes are cylindrical, cross-section conveyors mainly used for conveying liquids and gases. While used mainly for conveyances, pipes may also be used for structural applications.
Pipes are manufactured using two different methods which result in a seamless or welded pipe. In both processes, raw steel is first cast in a more workable starting form. It is then shaped into a pipe by stretching out the steel into a seamless tube or by pressing the ends together and sealing them with a weld.
The size of the pipe is defined with two numbers: the nominal diameter of the pipe (or bore) and the pipe schedule. With the exception of specialized applications, commercially available pipes come in standard sizes. Standard Sizes range from 1/2? NB – 16? NB.
Material Engineers recommend the best elements for the construction of pipes for various applications. Pipes are made in various types of materials, including ceramic, steel, plastic and concrete, to fulfil the requirements of particular applications.
Generally, metal pipes are manufactured of various forms of material, such as carbon steel, stainless steel, Inconel, Monel, Hastelloy, chromium, titanium, galvanized steel and more. Pipes are specifically identified for the content for a specific application.
Pipes are used in many industries owing to their corrosion resistance and machine-ability. They are commonly used in many applications like Oil and Gas Plants, Paper and Pulp Industry, Food Processing Industry, textile machinery, Chemical industries, Fertilizer industries, Dairy, Power plants, Water treatment and Desalination plants, synthetic fibres and more.
There are three different types of standard metal pipes - welded (ERW Pipe), seamless pipe, and galvanized pipe.
Pipes are classified by schedule and nominal diameter. For example, a 250mm nominal diameter and schedule 80 pipe.
Tube and Pipes can usually be used together as a generic term, but both have specific functions. Pipes are usually described by a minimal diameter and a fixed outer diameter, whereas tubes are specified by the outer diameter and wall thickness. The manufacturing and installation of pipes are regulated by the standards of the ASME B31 series. All pipe manufacturing plants will take measures and test product for chemical composition and carry out the test for mechanical strength.