Nippon Steel Spiral Pipe Company, Ltd.

Nippon Steel Spiral Pipe Company, Ltd. (日鉄大径鋼管株式会社) is a Japanese company that has been pursuing spiral steel pipe manufacturing technology for over half a century since its founding in 1965. It provides steel pipe piles, steel pipe sheet piles, structural steel pipes, and piping steel pipes, contributing to the development of social infrastructure such as roads, bridges, ports, rivers, water supply and sewerage, and apartment buildings. The company is part of the Nippon Steel Group.

The company was established in July 1965 as Igeta Large Diameter Steel Pipe Co., Ltd. (イゲタ大径鋼管(株)) in Sakai City, Osaka Prefecture, with capital of 300 million yen. In October of the same year, it absorbed Kurimoto Steel Pipe Industry Co., Ltd. (Kakogawa Plant) and increased capital to 500 million yen. In 1970, it changed its name to Sumitomo Metal Large Diameter Steel Pipe Co., Ltd. (住金大径鋼管(株)). In 2005, it became a wholly owned subsidiary of Sumitomo Metal Industries, Ltd. In 2012, following the merger of Nippon Steel Corporation and Sumitomo Metal Industries, it changed its name to Nippon Steel & Sumitomo Metal Large Diameter Steel Pipe Co., Ltd. (日鉄住金大径鋼管(株)). In 2019, it changed its name to Nippon Steel Large Diameter Steel Pipe Co., Ltd. (日鉄大径鋼管(株)) following the parent company's name change.

1. 日鉄大径鋼管株式会社
2. 沿革｜企業情報｜日鉄大径鋼管株式会社
3. 社長メッセージ｜企業情報｜日鉄大径鋼管株式会社
4. Nippon Steel Spiral Pipe Company, Ltd. (Japan)