This standard specifies the classification, technical requirements, test methods, inspection rules, packaging and storage of marine fin tube heat exchangers. This standard is applicable to L-type wound fin tube thermal equipment with a design pressure shell cavity not greater than 0.2 MPa, tube cavity not greater than 1.0 MPa, temperature not greater than 200°C, shell cavity medium is air, and tube cavity medium is seawater, fresh water, and air. switch.