Koch Heat Transfer (Formerly Brown Fintube and and Bas-Tex) designs and manufactures heat exchangers. The company also markets heat transfer systems. It is a subsidiary of Koch Chemical Technology Group LLC.​

Koch Heat transfer has been supplying heat exchangers since 1940. During last decade it continued to grow, acquiring the industry-proven BOS-HATTEN and ALCO product lines, including the Nitram Energy brand, BAS-TEX, SMITHCO Hairpin Exchangers and Muirhead.​

Today, Koch Heat Transfer company is part of Koch Engineered Solutions – a global true one-source provider of products, technologies, services and expertise for multiple industries such as refining, chemicals, gas processing, petrochemicals, offshore oil and gas production, tertiary oil recovery, food processing and municipalities.​

The company has operational presence in major markets across the Americas, Europe, the Middle East, Asia-pacific and Africa.