This document stipulates the terms and definitions, structural classification and basic parameters, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage and quality commitment of cross-flow steam generators. This document applies to generators with a cross-flow structure that use fuel, gas, or alcohol-based fuels as energy sources, have a total geometric volume of the inlet and outlet of the steam-water system less than 30 L, and a rated working pressure not greater than 1.6 MPa (hereinafter referred to as the generator). device). For once-through steam generators, please refer to this document.