The overseas business department of Rainbow Environment is located in Suzhou National High and New Technology Development Zone, and has wholly-owned overseas subsidiaries of ES and EV in Germany and the United States. Main business: prefabricated double layer stainless steel insulation chimney, overseas domestic fireplace chimney, and other high-temperature smoke exhaust pipes and other products.
　　In 2009, it obtained the certification of double-layer spiral connected and double-layer plug-in stainless steel fireplace chimneys that meet the CE EN1856-1 standard in the EU market, becoming a Chinese enterprise with double-layer spiral connected chimneys, and successfully achieved breakthroughs in overseas sales performance in the German and British markets. In 2011, it obtained the CE certification issued by the TUV testing agency in Germany, which means that the product quality has been comparable to the international production level. In 2012, we cooperated with Japanese customers to develop a series of 12 tooth spring bolt head and bottom cover double layer screw joint products, which was recognized by Japanese customers renowned for their strict technical and process requirements, and successfully entered the Japanese market. In 2015, it was certified as a double-layer stainless steel spiral welded fireplace chimney that meets the UL-103HT and ULC-S629 standards in the North American market, marking that the safety and technical standards of Rainbow overseas chimney products have reached the highest international level. And has successively reached in-depth cooperation with North American brand online sales platforms such as Home Depot, one of the world's top 500 companies. In 2022, it was certified in accordance with the EU market CE EN1090-2 welding process for large steel chimneys and the ISO 3834-3 welding quality management system, and was recognized by European customers such as the United Kingdom and Italy.
　　As a senior member of the International Industrial Chimney Association (CICINA) and an enterprise implementing global chimney research and development, production service sales, Rainbow Environment's products have been exported to dozens of countries and regions such as the United States, Germany, Japan, South Korea, Italy, the Netherlands, Denmark, Thailand, and South Africa.