The development of seamless steel pipe manufacturing technology has gone through three major stages.

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2016-10-11

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Steel Pipe Knowledge

Over the past century and more since the Mannesmann brothers invented the rotary piercing process, the development of seamless steel pipe manufacturing technologies has progressed through three distinct phases: 1. From the 1880s to the 1930s—nearly half a century—seven major pipe‑making processes emerged in succession: the periodic rolling mill (1892), the push‑through mill (1899), the continuous rolling mill (1901), the automatic rolling mill (1903), the Dieser rolling mill (1932), the three‑roll rolling mill (1937), and the extrusion mill. All these processes had reached industrial maturity and gradually became standardized; at the time, the automatic and periodic rolling mills were widely adopted, while pipes produced by the push‑through and three‑roll mills accounted for only a small share. Meanwhile, the continuous rolling mill and the Dieser rolling mill saw little further development. 2. During the roughly four decades from the 1940s to the early 1980s, the fully floating mandrel continuous rolling process experienced significant advancement, as evidenced by the commissioning of two rolling mills in the United States and two continuous rolling mills in Germany. The introduction of the MPM rolling mill at Dalmine’s Bergamo plant in 1978 and the semi‑floating mandrel continuous rolling mill at Yawata in 1983 marked the beginning of a new phase in which three distinct continuous rolling processes coexisted. During this period, developments in seamless steel pipe production also included the evolution of the push‑through process into the CPE process, the widespread adoption of tension‑reduction techniques, and the successful use of continuously cast round billets as raw material for pipe rolling. 3. Since the early 1980s, over the past two decades, both the three‑roll rolling mill and the Dieser rolling mill have undergone improvements, giving rise to new types of three‑roll mills and the Accu‑Roll mill. In addition, the three‑roll planetary rolling mill (1982), the GPS process (1989), and the PQF process (1993) have all been introduced. It is worth noting that the resurgence of the conical‑roller piercing machine represents a major breakthrough in this stage, one that will exert a profound influence on the future evolution of seamless steel pipe manufacturing technology.

Over the past century and more since the Mannesmann brothers invented the rotary piercing process, the development of seamless steel pipe manufacturing technology has progressed through the following three stages:

1. From the 1880s to the 1930s—over nearly half a century—seven major steel pipe manufacturing processes emerged in succession: the rotary rolling mill (1892), the push‑through mill (1899), the continuous rolling mill (1901), the automatic rolling mill (1903), the Dieser rolling mill (1932), the three‑roll rolling mill (1937), and the extrusion process. All of these methods had reached industrial maturity and gradually became standardized. At the time, the automatic rolling mill and the rotary rolling mill were widely adopted, while steel pipes produced by the push‑through mill and the three‑roll rolling mill accounted for only a small share; by contrast, the continuous rolling mill and the Dieser rolling mill saw little further development.

2. Over roughly four decades, from the 1940s to the early 1980s, fully floating mandrel continuous pipe rolling experienced significant development, as evidenced by the commissioning of two pipe‑rolling mills in the United States and two continuous rolling units in Germany. The introduction of the MPM mill at the Dalmine–Bergamo steel plant in 1978 and the semi‑floating mandrel continuous rolling mill at the Yawata plant in 1983 marked a new stage in the evolution of continuous pipe‑rolling technology, characterized by the coexistence of three distinct continuous rolling processes. During this period, advances in seamless steel pipe production also included the emergence of the push‑through process as the CPE method, the widespread adoption of tension‑reduction techniques, and the successful use of continuously cast round billets as feedstock for pipe‑rolling operations.

3. Over the past two decades, since the early 1980s, both three-roll tube mills and Dieseldorff tube mills have been improved, giving rise to new-generation three-roll tube mills and Accu‑roll mills. In addition, the three-roll planetary tube mill (1982), the GPS process (1989), and the PQF process (1993) have also emerged. It should be noted that the resurgence of the conical‑roller piercing mill represents a major breakthrough in this period, one that will exert a profound influence on the future development of seamless steel pipe manufacturing technologies.

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