gas and oil line pipe Normal OD: 42.3-244.5mm Wall thickness: 3- ... pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe, structure pipe, scaffold, piling pipeManufacture processesRaw material Test-Uncoiling-Strip leveling-End Cutting-End Shearing and ... cloth according to the size of the pipe with steel belt tied;3.according to the customers' requirement gas and oil line pipe