Benkan Kiko's large-diameter lateral pipes reduce on-site welding work!
The photo shows a lateral pipe where the branch pipe is connected diagonally to the main pipe. The connection of the branch pipe requires saddle welding on a curved surface, and since the branch pipe is connected at an angle rather than at a right angle, the connection surface becomes elliptical, which demands a very high level of skill from the welder. Additionally, a backing plate (pad) is welded to the main pipe using fillet welding. The backing plate is applied to reinforce the piping branch, and when performing prefabrication or on-site piping, there are concerns that directly welding support materials or foot materials to the product may affect the quality of the main pipe and the qualifications of the welders performing that welding. Therefore, the backing plate is used to address such concerns. The manufacturing of this backing plate also requires high forming skills to match the curved shape of the main pipe, but Benkan Kiko is capable of handling this. At Benkan Kiko, we can supply high-quality products through excellent welding technology and precise forming techniques.
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basic information
At Benkan Kiko, we possess high skill in the manufacturing of these structures and can supply various types of steel, including carbon steel, alloy steel, stainless steel, and non-ferrous metals. Additionally, when you are designing piping, are there cases where strength calculations for pipe fittings such as lateral pipes and tees are necessary? At Benkan Kiko, we also provide support for strength calculations of pipe fittings along with the manufacturing of products. If you have any concerns, please feel free to consult with us.
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Applications/Examples of results
We have a track record of supplying to various fields including nuclear power and thermal power plants, LNG plants, petrochemical plants, gas pipelines and stations, shipbuilding plants, and others. When assembling plant piping under the Electric Utility Industry Law and the Gas Utility Industry Law, welding work between materials must be carried out according to welding construction methods that comply with regulations. Generally, it is necessary to order the production of pipe fittings and piping welding from respective manufacturers that have obtained welding construction methods. In contrast, at Benkan Kiko, by centralizing the production of pipes and pipe fittings as well as prefabrication work, it is possible to unify the necessary regulatory planning documents and inspection applications related to pipes, pipe fittings, and piping prefabrication, as well as management and inquiry contact points. Additionally, for products subject to the Electric Utility Industry Law, it is also possible to reduce the number of pressure tests required by regulations, leading to potential cost savings.
Detailed information
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Backing plate application This is a product made by manufacturing welded steel pipes and then bonding backing plates to them. When support materials or foot materials are directly welded to the base material, there are concerns about the quality of the main pipe or the impact on welding qualifications, which can be resolved by applying backing plates. Additionally, to guarantee strength against internal pressure at pipe branching points, backing plates of the necessary thickness may be applied, resulting in two different uses.
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Company information
From residential water supply and hot water piping to massive pipelines in large-scale plants, piping that supports daily life is spread all over the world. Benkan Kiko Co., Ltd. is involved in the manufacturing of welded pipe fittings, which are essential piping components. We provide optimal products tailored to the piping environment (design, usage conditions, etc.) and construction circumstances, not only for general building water supply and hot water piping but also for power plants, gas plants, refineries, oil and chemical plants, shipbuilding, and more, where strict quality standards are required.
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