This standard specifies the basic parameters, requirements, test methods, inspection rules and marking, packaging and storage requirements of air-cooled, single-acting, general-purpose oil-lubricated miniature reciprocating piston air compressors (hereinafter referred to as "air compressors") . This standard applies to air compressors driven by electric motors with a rated power of 0.18kW to 15kW or internal combustion engines with equivalent power, and whose rated exhaust pressure does not exceed 1.4MPa. This standard is also applicable to air compressors for the same purpose that leave the factory without electric motors or internal combustion engines. Water-cooled air compressors and special-purpose air compressors can refer to this standard. This standard does not apply to direct-connected portable air compressors with a rated speed greater than or equal to 1400r/min.