Structural and Tested Pipe is stocked at Industrial Tube & Steel Corporation in both seamless and welded with a variety of sizes to meet the structural and mechanical piping requirements for applications in water, petroleum, oil & gas, construction and other industries. Carbon steel pipe can be structural in nature or used in fluid, gas, and oil transmission. I.T.S. stocks carbon steel piping in ASTM A500, A53, and A106 specifications. The grade indicates the testing methods required for a given application.