美国普利茅斯钢管厂的狄塞尔轧管机是第一台带限动芯棒的狄塞尔轧机。轧机延伸率2～2.5:1。轧机只用φ88.9mm、φ108mm和φ133mm管坯生产规格范围为φ42×4.2～φ127×15.875mm的钢管。该轧机设计年产量4.5万t,在安装第二座管坯加热炉后,年产量可达到6.5万t,多数钢管用作冷拔管坯料。为减少投资,普利茅斯钢管厂的切坯机,穿孔机及其他辅助设备都是购置的旧设备。该钢管厂工作人员仅有11人,两名操作工在操纵室控制从穿孔机到冷床的各工序,设备总装机容量为8106 kW。这套狄塞尔轧管机组的成材率为95％,D/S值约 The Diesel Mill at the Plymouth Steelworks in the United States is the first Diesel Mill to have a mandrel with limit. Rolling mill elongation 2 ~ 2.5: 1. Mill only φ88.9mm, φ108mm and φ133mm tube production specifications for the range of φ42 × 4.2 ~ φ127 × 15.875mm steel. The annual output of the mill is 45,000 tons. After installing the second tube furnace, the annual output can reach 65,000 tons. Most steel tubes are used as cold drawn tubes. In order to reduce investment, the Plymouth Pipe Plant cut-blanks, piercing machines and other ancillary equipment are purchased old equipment. The steel plant staff only 11 people, two operators in the control room from the punch to the cooling bed of the process, the total installed capacity of 8106 kW equipment. The Diesel Mill has a finished product rate of 95% and a D / S value of about