ANSI/API RP 553

This recommended practice (RP) addresses the special needs of automated valves in refinery services. The knowledge and experience of the industry has been captured to provide proven solutions to well-known problems.

This document provides recommended criteria for the selection, specification, and application of piston (i.e. double-acting and spring-return) and diaphragm-actuated (spring-return) control valves. Control valve design considerations are outlined such as valve selection, material selection, flow characteristic evaluation, and valve accessories. It also discusses control valve sizing, fugitive emissions, and consideration of the effects of flashing, cavitation, and noise.

Recommendations for emergency block and vent valves, on/off valves intended for safety instrumented systems, and special design valves for refinery services, such as Fluid Catalytic Cracking Unit (FCCU) slide valves and vapor depressurizing systems, are also included in this recommended practice.



Product Code(s): C55302,C55302

This product references:API Publ 2218 (R2010) - Fireproofing Practices in Petroleum Petrochemical Processing Plants, Second Edition
ANSI/API RP 556 - Instrumentation, Control, and Protective Systems for Gas Fired Heaters, Second Edition
ANSI/API Std 521 - Guide for Pressure-relieving and Depressuring Systems: Petroleum petrochemical and natural gas industries-Pressure relieving and depressuring systems, Fifth Edition (Includes 2008 Addendum)
API Std 598 - Valve Inspection and Testing, Ninth Edition
API Spec 6FA (R2011) - Fire Test for Valves, Includes Errata 1 and 2 (2008)
ANSI/API Std 607 - Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats, 6th Edition
ANSI/API Std 608 - Metal Ball Valves-Flanged, Threaded and Welding Ends, Fourth Edition
API Std 609 - Butterfly Valves: Double-flanged, Lug- and Wafer-type, Seventh Edition
ANSI/ASME B16.34-2009 - Valves Flanged, Threaded and Welding End, Includes Supplement (2010)
NFPA (Fire) 70 - National Electrical Code (NEC), 2011 Edition
ANSI/FCI 70-2-2006 - Control Valve Seat Leakage
ASME BPVC-VIII-1-2010 - 2010 ASME Boiler and Pressure Vessel Code (BPVC), Section VIII, Division 1: Rules for Construction of Pressure Vessels, Includes 2011 Addenda Reprint
IEC 60534-2-1 Ed. 2.0 b:2011 - Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions
IEC 61511-2 Ed. 1.0 b:2003 - Functional safety - Safety instrumented systems for the process industry sector - Part 2: Guidelines for the application of IEC 61511-1
ANSI/ISA 75.01.01-2007 (IEC 60534-2-1Mod) - Flow Equations for Sizing Control Valves
ANSI/ISA 75.02.01-2008 - Control Valve Capacity Test Procedure
IEC 60534-8-3 Ed. 3.0 b:2010 - Industrial-process control valves - Part 8-3: Noise considerations - Control valve aerodynamic noise prediction method
ANSI/ISA 75.08.01-2002 - Face-to-Face Dimensions for Flanged Globe-Style Control Valve Bodies: ANSI Classes 125, 150, 250, 300 and 600
ANSI/ISA 75.08.02-2003 - Face-to-Face Dimensions for Flangeless Control Valves (Classes 150, 300, and 600)
ANSI/ISA 75.08.06-2002 (R2007) - Face-to-Face Dimensions for Flanged Globe-Style Control Valve Bodies (ANSI Classes 900, 1500, and 2500)
ANSI/ISA 75.08.07-2001 (R2007) - Face-to-Face Dimensions for Separable Flanged Globe-Style Control Valves (Classes 150, 300 and 600)
ISA 75.25.01-2000 (R2010) - Test Procedure for Control Valve Response Measurement from Step Inputs
MSS SP-25-2008 - Standard Marking System for Valves, Fittings, Flanges and Unions
NACE MR0103-2012 - Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments
NACE 34103 - Overview of Sulfidic Corrosion In Petroleum Refining
NACE SP0170-2012 - Protection of Austenitic Stainless Steels and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking During Shutdown of Refinery Equipment
ANSI/NACE MR0175-2009 - Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Parts 1, 2, and 3 (Identical to ISO 15156-1:2009, 15156-2:2009, and 15156-3:2009)
NACE SP0472-2010 - Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments
This product replaces:ANSI/API RP 553 (R2007) - Refinery Control Valves