Welded steel pipes made of steel plates and piping prefabrication.
Welded steel pipes made of steel plates can be manufactured without lot restrictions and in random lengths. We also accept assembly of prefabricated piping.
At Benkan Kiko, we provide high-quality products in response to our customers' requests, including butt-welded pipe fittings, the manufacturing of welded steel pipes, and piping prefabrication, thanks to our long-established management system in piping products (materials, welding, manufacturing processes, and quality assurance). ■ Welded Steel Pipes ➢ Manufacturing Range ・Diameter: 400A (16B) to 1200A (48B) ・Wall Thickness: Up to 90mm ・Length: Short pipes up to 8,000mm (8000L) ➢ Recommended Points ・No lot restrictions; we can manufacture from a single piece. ・Short pipes and random lengths can be produced. ・We can accommodate specified bevel shapes and special tolerances (prior consultation required). ■ Piping Prefabrication ➢ Spoolable Range ・Spool Dimensions: 9000(w) x 2350(d) x 2000(h) ➢ Recommended Points ・We offer centralized management through a single point of contact for welded steel pipes, pipe fittings, and piping prefabrication. ・The same construction method ensures consistent quality of the welds.
basic information
【Welded Steel Pipes】 We can accommodate inspections by welding contractors. Pipes can be manufactured to any desired length. Bevel processing (including thinning of the inner surface of the piping) is also available. We can manage the longitudinal welds of welded pipe fittings and welded steel pipes in a unified manner. (This significantly streamlines inspections by welding contractors.) 【Piping Prefab】 We can manage the longitudinal welds of welded pipe fittings and welded steel pipes, as well as circumferential welds and corner welds for pipe supports, etc. (with specifications for leg length and throat thickness) in a unified manner. (This further streamlines inspections by welding contractors.) 【Nuclear Management】 For products intended for nuclear power plants, both items subject to inspections by welding contractors and those not subject to such inspections are managed separately within the factory during the manufacturing process to ensure complete traceability as part of nuclear management.
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At Benkan Kiko, we are capable of manufacturing welded steel pipes, steel plate pipe fittings, and prefabricated piping, allowing us to centralize the planning documentation and inspection applications as stipulated by the Electric Utility Industry Law and the technical standards for nuclear or thermal power generation facilities, as well as management and inquiry contact points. According to the aforementioned regulations, a water pressure test is required to confirm the pressure performance of the pressure-bearing parts of the piping. However, if welded steel pipes, steel plate pipe fittings, and prefabricated piping are ordered from separate vendors, each will need to undergo individual water pressure tests, and additionally, the prefabricated piping will also require a water pressure test. In contrast, by centrally managing welded steel pipes, steel plate pipe fittings, and prefabricated piping, Benkan Kiko can consolidate the water pressure testing of individual piping components and the prefabricated piping, contributing to cost reduction for the entire project. Furthermore, for products with shapes not specified in the pipe fitting standards, we can perform structural analysis in the elastic or elastic-plastic range using the finite element method (FEM) to conduct pressure design. Additionally, even within power plants, we offer prefabricated piping for fire protection piping fittings, flanges, nozzles, and nipples that comply with the Fire Service Law, available in stainless steel and carbon steel (galvanized).
