[Case Study] Replacement Work of Elbow Piping at Power Plant
We would like to introduce an example of on-site piping replacement work that reduces management burden!
We received an order for products for the replacement work of elbows with longitudinal weld seams, which we delivered for the after-service project for the thermal power plant of Mitsubishi Heavy Industries, Nagasaki Factory. This project involved the on-site replacement of aging piping used under high temperature and high pressure conditions. Instead of the same elbows supplied previously, we provided a new product that incorporates many advantages, which was well received. The specifications of the product that were appreciated are as follows: - Seamless elbows to eliminate longitudinal weld seams. - To reduce the workload within the engineering manufacturer, a water pressure test was conducted at Benkan Kiko at a pressure of 1.3 times the design pressure. - Suspension brackets were installed to facilitate easy replacement work on-site. By conducting the water pressure test at 1.3 times the design pressure in advance at Benkan Kiko, we can avoid the risk of performing a water pressure test at 1.3 times the design pressure on aging piping. We have confirmed and experienced effects such as delivery management and workload reduction, and we have received high evaluations, including subsequent orders for after-service projects under the same scheme.
basic information
Management of on-site replacement work for aging pipes used under high temperature and high pressure conditions can be achieved by conducting hydraulic tests at Benkan Kiko, which helps mitigate risks related to delivery management and hydraulic testing after replacement on-site. Additionally, if the line is subject to inspection by a welding contractor, it is possible to undergo welding contractor inspection at Benkan Kiko, including circumferential welding around the elbows and pipes.
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Applications/Examples of results
Examples of achievements - 90E(L)N PA22 600A 34.0T - 90E(L)N PA24 600A 41.0T - 90E(L)N PA24 450A 82.0T - 90E(L)N PA24 500A 21.0T There are other achievements as well.
