This standard specifies the model, requirements, test methods, inspection rules and markings, packaging and storage of small reciprocating piston hydrogen compressors (hereinafter referred to as "hydrogen compressors"). This standard applies to hydrogen compressors with a piston force not greater than 5.5t, a rated exhaust pressure not greater than 20MPa, and a drive motor power not greater than 160kW. This standard also applies to pressurized hydrogen compressors.