The working principle of the tubular heat exchanger is to achieve enhanced heat transfer within the tubes by incorporating an internal insert that generates radial flow, pushing the precision of the insert to the extreme. It demonstrates its precision and cost-effectiveness in high-viscosity systems and other systems. The company has developed inserts suitable for high-viscosity systems as well as for ordinary fluids with low pressure drop and cost-effectiveness. The company can customize (i.e., process calculation design) according to customer process requirements. Currently, this product has replaced imported foreign equivalents in industries such as ABS and PS, such as Tianjin Daguhua, Shanghai Hua Yi, Changchun Gaoci, etc. It has also been gradually applied and promoted in domestic new material industries such as polyester, polylactic acid, and cellulose.