This document specifies the terms and definitions, basic parameters and design conditions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of pressure swing adsorption (PSA) nitrogen generation equipment (hereinafter referred to as nitrogen generation equipment) ,quality promise. This document is applicable to equipment that uses compressed air to separate and produce nitrogen from the air using the molecular sieve pressure swing adsorption method at room temperature, with a nitrogen production output of no more than 5 000 m3/h. Note 1: The nitrogen production in this document is in the standard state, that is, the gas volume at 0 ℃, 0.101 325 MPa (absolute pressure), in cubic meters (m3). Note 2: Unless otherwise noted, pressure values are gauge pressure values.