This specification specifies the requirements, quality assurance regulations and delivery preparations for plate-type seawater desalination units (hereinafter referred to as units). This specification is applicable to the design of a device where the design pressure of the inter-plate medium is not greater than 0.6MPa, using jacket water, low-pressure waste steam or saturated steam as the heat source, the evaporator and condenser are plate structures, and vacuum boiling distillation is used to convert seawater into fresh water. , manufacturing and acceptance.