Seamless steel pipe is regularly used in the transportation of fluids such as water, natural gas, waste and air. It is also regularly required in many high-pressure, high-corrosive environments such as in the oil & gas, power generation and pharmaceutical industries. And seamless pipe can also be devided into different types like API Seamless Pipe, ASTM Seamless Pipe and so on. http://www.hpsteelpipe.com/seamless-steel-pipe/