Having been the first company in Japan to initiate manufacture and sales of spiral-welded steel pipes, Kubota has met demands from users across the country.
For field-welding operations, careful construction management has been required; this includes checking welders' skills, ensuring appropriate working conditions, and conducting tests to verify welding quality by such means as radiographic and ultrasonic testing. However, in recent years, with the increasing use of steel pipe piles of larger outside diameters and wall thicknesses welding operations have come to account for a lion’s share of total construction time. This has given rise to demand for a more reliable, simple and economical method for jointing steel pipes. Accordingly, Kubota developed a mechanical joint as an alternative to field-welding. It can reduce construction costs by ensuring consistent quality of jointing, shortening construction times, and reducing workloads.