Stainless Steel 304 rectangular pipe offered by Kamal Steel Industries is highly resistant to many corrosive media, which also has good electrical, thermal and magnetostrictive properties. These Rectangular steel pipes have high deformability, high corrosion Small Diameter Pipe - Texas Iron and MetalJan 01, 2016 · Small Diameter Pipe. Sizes range from 1/2" to 4". Schedule 40 and 80 available. Lengths from 17'-8" to 39'. Size.