In pipeline engineering selection，coiling pipe、seamless tube、Straight seam pipes are often confused，The core differences among the three are concentrated in production processes and applicable scenarios。The rolled tube is made of steel plate cold rolled or hot rolled and welded after forming，Main focus on large caliber、thick wall、Non-standard customization，The caliber can be flexibly adjusted to400-6000mm，The maximum wall thickness is up to200mm，No need for specialized molds，short delivery cycle、cost controllable；Seamless pipes rely on hot rolling perforation process，Small caliber（many≤630mm），Strong resilience but high customization cost；Straight seam pipes are suitable for small and medium-sized conventional specifications，High efficiency in mass production。Roll the tube with“customization+High compatibility”advantage，Becoming a municipal infrastructure、oil and gas transportation、The preferred pipe material for large-scale projects such as chemical storage tanks，When selecting, it is necessary to consider the caliber、pressure、Accurate matching of working conditions。