... quality and low price 2. Structure steel pipe, piling pipe, Sewage and clear water transportation. Line pipe for petrole Description(Unit,mm) Round ... , 48, 50.8, 57, 63.5, 76, 83, 89 Square pipe 16X16,19X19,20X20,22.2X22.2,25.4X25.4,30X30 ... ,40X40,45X45,50X50,60X60,70X70and other rectangular or oval pipe of the same specifications. Thickness from 0.85mm to 3mmApplication1 ...