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Latest update: 15/09/2022 12:22:13

Seiwa Kogyo Co.,Ltd.

We work with the Seiwa HD Group in a network of backstreet factories for welding assembly and finishing

As part of a group that operates in multiple manufacturing segments, we can offer proposals that are not possible for a single company alone.

We produce various products with our advanced welding technology.

We have solid technical capabilities based on our experience in industrial machinery, large road signs, bridge products, construction steel frames, and civil engineering products, with a track record of more than 300 articles per year.

Our four strengths are our technical capabilities, support system, organization, and growth potential. These make us a welding processing partner that you can have a long-term relationship with.

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Sales Pitch

Machined products
Large road signposts
We possess know-how and technology from over 25 years of production experience. We have experts in large signs who have experience in constructing the Metropolitan Expressway, the most difficult in Japan, as well as various UT and MT inspections.

We make full use of our factory with over 3,300 square meters of space to stock pipe inventory, conduct manufacturing, and perform temporary assembly inspections at the same time.

Even larger diameters (diameter 508.0 or larger) can be handled by using turning rolls. We also have a thorough inspection system that includes in-house inspections, customer inspections, and inspections by the prime contractor, and we pursue manufacturing with a focus on quality.
Inspection route
We can handle everything from material procurement to assembly after surface treatment.

In addition, we have a monthly production capacity of up to 100 tons.

Our strength lies in our ability to purchase materials from multiple suppliers to reduce costs and to deliver products in as little as three weeks from taking an order.
Bridge products
We support various types of inspections, including 1/2 line ultrasonic testing.

Our welding appearance and distortion tolerances have been highly evaluated by customers.

We can provide a full range of services from procuring mill sheets for products to surface treatment, preparation of finished shapes, and witnessing with various agencies.

We can also supply products with short lead times by making use of our own network and so on, even at the end of the fiscal year when orders are concentrated.

This company is recommended by the following support organizations.

Marketing Support Department, SMRJ

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