API 613

Special Purpose Gear Units for Petroleum, Chemical and Gas Industry Services
API Std 613 | 5th Edition | February 2003 | Reaffirmed: August 2007 |

Covers the minimum requirements for special-purpose, enclosed, precision single- and double-helical one-and two-stage speed increasers and reducers of parallel-shaft design for refinery services. Primarily intended for gear units that are in continuous service without installed spare equipment.