Boiler tubes and pipes require extremely superior quality and a variety of steel grades and dimensions suited to usage situations.
To fully meet these requirements, our boiler tubes and pipes have emerged from a secure system through years of experience and foremost engineering process, as a backdrop.
They are manufactured based on an integrated production system and on strict quality design and quality control, ranging from raw materials to final products.
In line with diversifying needs, we are developing new materials and products, and are conducting a wide variety of research and development, including manufacturing process research.

Our boiler tubes and pipes are consistently controlled, from steel-making to tube and pipe-making, in order to ensure the manufacturing of all steel grades, as well as to assure uniform and stable quality, through strict quality control during each process.
Particularly, steel-making processes, from component mixture to final heat treatment, undergo optimum quality design regarding boiler steel tubes and pipes, by putting years of experience and high engineering process to full use so that products can endure long usage periods of one or two decades. In order to bring the quality design into shape, a new refining method in steel-making is introduced and various manufacturing processes are selected according to dimensions, material properties, and internal and external surface condition.

Seamless steel tubes and pipes are hot manufactured using The plug mill-rolling process, mandrel mill-rolling process, extrusion process, and push bench process.
The plug mill-rolling process is used to manufacture medium-diameter carbon steel tubes and low-alloy steel tubes, and the mandrel mill-rolling process is used to manufacture small-diameter carbon steel tubes and low-alloy steel tubes. The extrusion process is used to manufacture high-alloy steel tubes, such as stainless steel, and special tubes, such as finned tubes. The push bench process is suited for manufacturing large-diameter, thick-wall tubes, and enables the manufacturing of carbon steel, alloy steel, and stainless steel tubes and pipes.
These hot manufactured tubes are cold finished using cold-drawing and cold-rolling processes that fit the applications and thermal treatments.

Boiler tubes and pipes are strongly demanded in order to satisfy especially strict usage conditions, along with operational reliability. We conduct strict quality control in all processes, from steel-making to tube and pipe-making, and we have established the following quality assurance system.

Our boiler tubes and pipes have been used the world over, embodying various characteristic products through distinguished engineering process and abundant experience, and they have earned high reputation and trust not only in Japan but also overseas.
It is no exaggeration to say that this is also a good result of systematic research and development systems, ranging from raw materials to products.
At present, with the aim of a further leap forward, we are proceeding with research from the following broad angles.

We will also further improve the research department and enhance its functions, and will strive to help promote global iron-making in future.