Manufacturing And Maintenance Of Spiral Plate Heat Exchangers

The core manufacturing process of spiral plate heat exchangers is rolling technology, and advanced automatic stud welding technology helps prevent internal leaks. Optimized intermediate partition plate design, one-piece molding process, and header distribution design further enhance equipment quality, prevent leaks, and extend service life.

The manufacture of spiral plate heat exchangers must comply with industry standard NB/T 47048. NB/T 47048-2015 will be abolished on March 28, 2026, and replaced by NB/T 47048-2025. The new standard raises the requirements for parameters such as maximum nominal pressure, nominal diameter, and heat exchange area. Domestic technology can now manufacture high-parameter equipment exceeding the standard range, such as spiral plate heat exchangers with a design pressure differential of 4 MPa.

Spiral plate heat exchangers are mainly divided into non-removable (Type I) and removable (Type II, Type III) types. Non-removable (Type I) spiral plate heat exchangers have both ends of the channels welded shut, eliminating the need for flanges and other components. The detachable spiral plate heat exchanger uses end flange connections, with the flat cover secured and sealed using gasketed bolt flanges.

The single-channel design of the spiral plate heat exchanger employs a "self-cleaning" mechanism, which helps reduce fouling. The high shear rate contributes to this self-cleaning effect, preventing equipment blockage and extending maintenance-free operating time. For maintenance-required situations, the detachable design uses a hinged cover and C-clamp seal, allowing for quick opening without special tools, facilitating inspection and cleaning of the entire heat transfer surface. Regular maintenance, including cleaning with solvent-based cleaning solutions during maintenance, is an effective measure to ensure long-term stable operation and extend service life.