Standard material (JIS G 3302 galvanized steel sheet)
1. Free Design "Spiral Duct" has no restrictions on the length of the hoop used. The length of the duct can be manufactured to any length within the limits of transportation conditions, making it convenient for handling and installation, and saving on on-site joining costs. *As a rule, the standard length is 4m. 2. Lightweight and Strong "Spiral Duct" is continuously manufactured by spirally winding hoops of widths 100mm and 150mm, and thicknesses of 0.5 to 1.6mm, overlapping and fixing both ends with a fold. 3. Quality and Environment "Spiral Duct" guarantees uniform and reliable quality while being a reusable, environmentally friendly product. San-Ei considers the impact of its business activities, products, and services on the global environment, strives for environmental conservation, and engages in continuous improvement. 4. Compliance with Ministry of Land, Infrastructure, Transport and Tourism Specifications The product material primarily uses galvanized steel sheets, with standard products made from galvanized steel sheets according to JIS G 3302, and specifications conforming to the Ministry of Land, Infrastructure, Transport and Tourism standards. Additionally, spiral ducts made from materials such as stainless steel (SUS304 2B) and PVC-lined steel sheets are also available.
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Since our establishment in 1968, we have been engaged in the development, construction, and sales of air conditioning equipment, painting equipment, and related devices (duct products and various types of metal fabrication). Moving forward, we will continue to enhance our technical capabilities in the "Air Conditioning and Water Supply and Drainage Sanitation Equipment Division," "Painting Plant Equipment Division," "Duct Products Division," and "Manufacturing Division" to better meet the diverse needs of our customers and business partners. We will provide air conditioning equipment, painting equipment, and related devices (duct products and various types of metal fabrication). We sincerely appreciate your guidance and encouragement.