Refinery valves account for a high percentage of volatile organic compound (VOC) emissions. API 553 incorporates stringent packings and bellows-seal specifications, ensuring automated valves comply with regional clean air laws and pass structural testing profiles such as those found in API Standard 622. Emergency Block Valves (EBVs) and Safety Systems
When fluid passes through a control valve's restriction, a dramatic localized drop in pressure occurs. API RP 553 outlines calculations and mechanical configurations to manage the resulting destructive phenomena: api 553 pdf
Utilization of chrome-moly steels (e.g., WC6, WC9, C5, C12) for high-temperature creep resistance, and austenitic stainless steels for corrosive environments. Valve Types Specified Refinery valves account for a high percentage of
It superseded the 1998 edition, which was titled "Refinery Control Valves". Key Technical Scope C12) for high-temperature creep resistance