Iron pipe Iron Pipe Is a hollow tube that is used for various purposes. In production with two different methods which result in either pipes in weld or seamless pipes. In both methods, raw steel is first liquidated and put into the starting form can be applied. This is then made into steel pipes by stretching out into smooth tubes or forcing edges together and sealing can be welded. the first method for producing steel pipes was introduced in the early 1800s. and they have continued to evolve into modern processes we use when every year, millions of tons of steel pipes are produced, the flexibility to make products that are most often used is produced by the steel industry