HDPE one-step pu heat preservation pipe production line Shell, anticorrosive coating while wrapped in steel pipe road, can connect operation, high efficiency and low cost. Online peen-forming derusting, online spraying antirust processing. Online automatic hydraulic machine, automatic correction of high precision is stable and reliable. Pipes adopts multi-roll roller compaction transmission, steel pipe transmission steady straight. Pipes production range: 48 - 1000mm.