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API 520-1 : 2014

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 1: SIZING AND SELECTION

Superseded date

02-11-2020

Published date

02-07-2014

1 Scope
2 Normative References
3 Terms and Definitions
4 Pressure-relief Devices
5 Procedures for Sizing
Annex A (informative) - Rupture Disk Device Specification
        Sheet
Annex B (informative) - Review of Flow Equations Used in
        Sizing Pressure-relief Devices
Annex C (informative) - Sizing for Two-phase Liquid/Vapor
        Relief
Annex D (informative) - Pressure-relief Valve Specification
        Sheets
Annex E (informative) - Capacity Evaluation of Rupture Disk
        and Piping System 100% Vapor Flow and Constant Pipe
        Diameter
Bibliography

Pertains to the sizing and selection of pressure-relief devices used in refineries, chemical facilities, and related industries for equipment that has a maximum allowable working pressure (MAWP) of 15 psig (103 kPag) or greater.

DevelopmentNote
Also available in Russian version, see API 520-1 RUSSIAN. (02/2016)
DocumentType
Standard
PublisherName
American Petroleum Institute
Status
Superseded
SupersededBy
Supersedes

API 2FPS : 2011 PLANNING, DESIGNING, AND CONSTRUCTING FLOATING PRODUCTION SYSTEMS
API 14E : 1991 : R2013 RECOMMENDED PRACTICE FOR DESIGN AND INSTALLATION OF OFFSHORE PRODUCTION PLATFORM PIPING SYSTEMS
11/30159581 DC : 0 BS EN ISO 23251 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
API 676 CHINESE : 2009 POSITIVE DISPLACEMENT PUMPS - ROTARY
API 521 : 2014 PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
EEMUA 184 : 2009 GUIDE TO THE ISOLATION OF PRESSURE RELIEVING DEVICES
BS EN ISO 10439-1:2015 Petroleum, petrochemical and natural gas industries. Axial and centrifugal compressors and expander-compressors General requirements
API RP 74 : 2001 : R2013 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
CSA 12.8 : 2002 : R2013 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
CSA/ANSI NGV4.8 :2012 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
ANSI/CSA HGV 4.8-2012 (R2018) Hydrogen gas vehicle fueling station compressor guidelines
PREN ISO 23251 : DRAFT 2011 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
UNE-EN ISO 21013-3:2016 Cryogenic vessels - Pressure-relief accessories for cryogenic service - Part 3: Sizing and capacity determination (ISO 21013-3:2016)
NFPA 87 : 2018 FLUID HEATERS
BS EN ISO 10437:2003 Petroleum, petrochemical and natural gas industries. Steam turbines. Special-purpose applications
ONORM EN ISO 23251 : OCT 2008 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
ASME PTB 2 : 2009 GUIDE TO LIFE CYCLE MANAGEMENT OF PRESSURE EQUIPMENT INTEGRITY
ASHRAE 15 USER'S MANUAL : 2002 USER'S MANUAL FOR ANSI/ASHRAE STANDARD 15-2001, SAFETY STANDARD FOR REFRIGERATION SYSTEMS
BS ISO 4126-10:2010 Safety devices for protection against excessive pressure Sizing of safety valves for gas/liquid two-phase flow
API 14E CHINESE : 2007 RECOMMENDED PRACTICE FOR DESIGN AND INSTALLATION OF OFFSHORE PRODUCTION PLATFORM PIPING SYSTEMS
11/30253360 DC : 0 BS EN ISO 13628-14 - PETROLEUM AND NATURAL GAS INDUSTRIES - DESIGN AND OPERATION OF SUBSEA PRODUCTION SYSTEMS - PART 14: SUBSEA HIGH INTEGRITY PRESSURE PROTECTION SYSTEMS (HIPPS)
API 581 REDLINE : 2008 RISK-BASED INSPECTION TECHNOLOGY
CSA/ANSI NGV4.8 : 2012 : R2013 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
EEMUA 151 : 1987 LIQUID RING VACUUM PUMPS AND COMPRESSORS
CSA/ANSI NGV 4.1-2018 Natural gas vehicle (NGV) dispensing systems
API 520-2 : 2015 SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 2: INSTALLATION
NORSOK I 001 : 2010 FIELD INSTRUMENTATION
API 14G :2007(R2013) RECOMMENDED PRACTICE FOR FIRE PREVENTION AND CONTROL ON FIXED OPEN-TYPE OFFSHORE PRODUCTION PLATFORMS
ASTM F 1508 : 1996 : R2010 Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services
NFPA 52 : 2016 VEHICULAR NATURAL GAS FUEL SYSTEMS CODE
I.S. EN ISO 14224:2016 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - COLLECTION AND EXCHANGE OF RELIABILITY AND MAINTENANCE DATA FOR EQUIPMENT (ISO 14224:2016)
UNI EN ISO 23251 : 2008 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
I.S. EN ISO 10438-4:2007 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - LUBRICATION, SHAFT-SEALING AND CONTROL-OIL SYSTEMS AND AUXILIARIES - PART 4: SELF-ACTING GAS SEAL SUPPORT SYSTEMS
I.S. EN ISO 10438-1:2007 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - LUBRICATION, SHAFT-SEALING AND CONTROL-OIL SYSTEMS AND AUXILIARIES - PART 1: GENERAL REQUIREMENTS
BS PD5500(2015) : 2015 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS PD5500(2009) : 2009 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
PD 5500:2003 Specification for unfired fusion welded pressure vessels
BS PD5500(2018) : 2018 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS 5908:1990 Code of practice for fire precautions in the chemical and allied industries
BS PD5500(2006) : 2006 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
BS PD5500(2012) : 2012 SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS
EEMUA 208 : 2010 GUIDE TO LIFE-CYCLE MANAGEMENT OF PRESSURE RELIEF SYSTEMS
06/30116454 DC : DRAFT MAY 2006 ISO 10438-4 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - LUBRICATION, SHAFT-SEALING AND CONTROL-OIL SYSTEMS AND AUXILIARIES - PART 4: SELF-ACTING GAS SEAL SUPPORT SYSTEMS
API 2510A : 1996 : R2015 FIRE-PROTECTION CONSIDERATIONS FOR THE DESIGN AND OPERATION OF LIQUEFIED PETROLEUM GAS (LPG) STORAGE FACILITIES
I.S. EN ISO 21013-3:2016 CRYOGENIC VESSELS - PRESSURE-RELIEF ACCESSORIES FOR CRYOGENIC SERVICE - PART 3: SIZING AND CAPACITY DETERMINATION (ISO 21013-3:2016)
API 676 REDLINE : 2009 POSITIVE DISPLACEMENT PUMPS - ROTARY
16/30313951 DC : 0 BS ISO 18154 - SHIPS AND MARINE TECHNOLOGY - PILOT OPERATED SAFETY VALVES FOR LOW TEMPERATURE APPLICATIONS - DESIGN REQUIREMENTS
04/30114086 DC : DRAFT JUL 2004 EN ISO 10440-1 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - ROTARY-TYPE POSITIVE DISPLACEMENT COMPRESSORS - PART 1: PROCESS COMPRESSORS (OIL-FREE)
API SPEC 12J : 2008 SPECIFICATION FOR OIL AND GAS SEPARATORS
18/30371116 DC : 0 BS ISO 23251 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
API 611 : 2008 GENERAL-PURPOSE STEAM TURBINES FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
API 611 : 2008 : R2014 GENERAL-PURPOSE STEAM TURBINES FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
ASTM F 1508 : 1996 : R2016 : EDT 1 Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas, and Liquid Services
CSA 12.8 :2002 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
I.S. EN ISO 10439-1:2015 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - AXIAL AND CENTRIFUGAL COMPRESSORS AND EXPANDER-COMPRESSORS - PART 1: GENERAL REQUIREMENTS (ISO 10439-1:2015)
API 2610 : 2005 : R2010 DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES
API 614 REDLINE : 2008 LUBRICATION, SHAFT-SEALING AND OIL-CONTROL SYSTEMS AND AUXILIARIES
ISO 4126-10:2010 Safety devices for protection against excessive pressure — Part 10: Sizing of safety valves for gas/liquid two-phase flow
API 2000 : 2014 VENTING ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
API 2510 : 2001 : R2011 DESIGN AND CONSTRUCTION OF LPG INSTALLATIONS
ISO 10438-1:2007 Petroleum, petrochemical and natural gas industries — Lubrication, shaft-sealing and control-oil systems and auxiliaries — Part 1: General requirements
ISO 28300:2008 Petroleum, petrochemical and natural gas industries — Venting of atmospheric and low-pressure storage tanks
ISO 14224:2016 Petroleum, petrochemical and natural gas industries Collection and exchange of reliability and maintenance data for equipment
EEMUA 207 : 2009 DOUBLE CONCRETE TANKS FOR LIQUEFIED GAS - GUIDE TO DESIGN, CONSTRUCTION AND OPERATION
I.S. EN ISO 23251:2007 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
EEMUA 193 : 2013 MANAGING COMPETENCE ASSURANCE FOR PERSONNEL UNDERTAKING IN-SERVICE INSPECTION OF PRESSURE EQUIPMENT
API STD 612:2020 Petroleum, Petrochemical, and Natural Gas Industries - Steam Turbines - Special-purpose Applications
CSA N290.8 : 2015 TECHNICAL SPECIFICATION REQUIREMENTS FOR NUCLEAR POWER PLANT COMPONENTS
ASHRAE HDBK REFRIGERATION : 2014 ASHRAE HANDBOOK - REFRIGERATION
UNI EN ISO 28300 : 2009 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - VENTING OF ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
EI GUIDE. DESIGN & OPER. HEAT EXCHANGERS : 2015-12 GUIDELINES FOR THE SAFE DESIGN AND OPERATION OF SHELL AND TUBE HEAT EXCHANGERS TO WITHSTAND THE IMPACT OF TUBE FAILURE
API 526 RUSSIAN : 2009 FLANGED STEEL PRESSURE RELIEF VALVES
API 2510A : 1996 : R2010 FIRE-PROTECTION CONSIDERATIONS FOR THE DESIGN AND OPERATION OF LIQUEFIED PETROLEUM GAS (LPG) STORAGE FACILITIES
06/30116443 DC : DRAFT MAY 2006 ISO 10438-2 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - LUBRICATION, SHAFT-SEALING AND CONTROL-OIL SYSTEMS AND AUXILIARIES - PART 2: SPECIAL-PURPOSE OIL SYSTEMS
BS ISO 23251 : 2006 AMD 17355 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
EEMUA 188 : 2009 GUIDE FOR ESTABLISHING OPERATING PERIODS OF SAFETY VALVES
02/705659 DC : DRAFT APR 2002 ISO/DIS 21049 - PUMPS - SHAFT SEALING SYSTEMS FOR CENTRIFUGAL AND ROTARY PUMPS
04/30127186 DC : DRAFT DEC 2004 ISO 23251 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
API STD 676 : 2009 POSITIVE DISPLACEMENT PUMPS - ROTARY
API RP 14E : 1991 RECOMMENDED PRACTICE FOR DESIGN AND INSTALLATION OF OFFSHORE PRODUCTION PLATFORM PIPING SYSTEMS
API 92M : 2017 MANAGED PRESSURE DRILLING OPERATIONS WITH SURFACE BACK-PRESSURE
API 17O : 2014 SUBSEA HIGH INTEGRITY PRESSURE PROTECTION SYSTEMS (HIPPS)
API 14G : 2007 RECOMMENDED PRACTICE FOR FIRE PREVENTION AND CONTROL ON FIXED OPEN-TYPE OFFSHORE PRODUCTION PLATFORMS
API 612 : 2014 PETROLEUM, PETROCHEMICAL, AND NATURAL GAS INDUSTRIES - STEAM TURBINES - SPECIAL-PURPOSE APPLICATIONS
ASTM F 1508 : 1996 : R2004 Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services
ASTM F 1508 : 1996 Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services
API 2610:2005 DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES
ISO 21013-3:2016 Cryogenic vessels Pressure-relief accessories for cryogenic service Part 3: Sizing and capacity determination
BS EN ISO 28300:2008 Petroleum, petrochemical and natural gas industries. Venting of atmospheric and low-pressure storage tanks
BS EN ISO 13703 : 2001 PETROLEUM AND NATURAL GAS INDUSTRIES - DESIGN AND INSTALLATION OF PIPING SYSTEMS ON OFFSHORE PRODUCTION PLATFORMS
ISO 10437:2003 Petroleum, petrochemical and natural gas industries — Steam turbines — Special-purpose applications
ISO 23251:2006 Petroleum, petrochemical and natural gas industries Pressure-relieving and depressuring systems
BS EN ISO 10438-1:2003 Petroleum, petrochemical and natural gas industries. Lubrication, shaft-sealing and control-oil systems and auxiliaries General requirements
UNE-EN ISO 28300:2012 Petroleum, petrochemical and natural gas industries - Venting of atmospheric and low-pressure storage tanks (ISO 28300:2008)
ISO 10439-1:2015 Petroleum, petrochemical and natural gas industries Axial and centrifugal compressors and expander-compressors Part 1: General requirements
ISO 10438-4:2007 Petroleum, petrochemical and natural gas industries Lubrication, shaft-sealing and control-oil systems and auxiliaries Part 4: Self-acting gas seal support systems
12/30210113 DC : 0 BS EN ISO 28300 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - VENTING OF ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
BS EN ISO 23251 : 2007 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
EN ISO 10437:2003 Petroleum, petrochemical and natural gas industries - Steam turbines - Special-purpose applications (ISO 10437:2003)
EN ISO 10438-1:2007 Petroleum, petrochemical and natural gas industries - Lubrication, shaft-sealing and control-oil systems and auxiliaries - Part 1: General requirements (ISO 10438-1:2007)
EN ISO 10439-1:2015 Petroleum, petrochemical and natural gas industries - Axial and centrifugal compressors and expander-compressors - Part 1: General requirements (ISO 10439-1:2015)
EN ISO 21013-3:2016 Cryogenic vessels - Pressure-relief accessories for cryogenic service - Part 3: Sizing and capacity determination (ISO 21013-3:2016)
UNI EN ISO 10438-4 : 2009 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - LUBRICATION, SHAFT- SEALING AND CONTROL-OIL SYSTEMS AND AUXILIARIES - PART 4: SELF-ACTING GAS SEAL SUPPORT SYSTEMS
API PUBL 2510A : 1996 FIRE-PROTECTION CONSIDERATIONS FOR THE DESIGN AND OPERATION OF LIQUEFIED PETROLEUM GAS (LPG) STORAGE FACILITIES
10/30231432 DC : 0 BS EN ISO 10439-1 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - AXIAL AND CENTRIFUGAL COMPRESSORS AND EXPANDER-COMPRESSORS - PART 1: GENERAL REQUIREMENTS
API 676 : 2009 : R2015 POSITIVE DISPLACEMENT PUMPS - ROTARY
API 9100B : 1998 GUIDANCE DOCUMENT FOR MODEL EHS MANAGEMENT SYSTEM
API 675 : 2012 POSITIVE DISPLACEMENT PUMPS - CONTROLLED VOLUME FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
ABS 0063 : 2018 COR 2018 RULES FOR BUILDING AND CLASSING FACILITIES ON OFFSHORE INSTALLATIONS
API 611 REDLINE : 2008 GENERAL-PURPOSE STEAM TURBINES FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
09/30171555 DC : DRAFT SEP 2009 BS EN ISO 10437 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - STEAM TURBINES - SPECIAL-PURPOSE APPLICATIONS
DIN EN ISO 28300:2008-11 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - VENTING OF ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
API 681 : 1996 : R2010 LIQUID RING VACUUM PUMPS AND COMPRESSORS FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
BS EN ISO 21013-3:2016 Cryogenic vessels. Pressure-relief accessories for cryogenic service Sizing and capacity determination
API RP 74 : 2001 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
CSA/ANSI NGV4.8 : 2012 : R2016 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
CSA 12.8 : 2002 : R2016 STANDARD FOR NATURAL GAS VEHICLE FUELING STATION RECIPROCATING COMPRESSOR GUIDELINES
API RP 74 : 2001 : R2007 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
API 681 : 1996 LIQUID RING VACUUM PUMPS AND COMPRESSORS FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
API 2510 : 2001 DESIGN AND CONSTRUCTION OF LPG INSTALLATIONS
API 581 : 2016 RISK-BASED INSPECTION METHODOLOGY
API 614 : 2008 LUBRICATION, SHAFT-SEALING AND OIL-CONTROL SYSTEMS AND AUXILIARIES
DIN EN ISO 28300:2012-02 (Draft) PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - VENTING OF ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
BS EN ISO 10438-4:2003 Petroleum, petrochemical and natural gas industries. Lubrication, shaft-sealing and control-oil systems and auxiliaries Self-acting gas seal support systems
BS EN ISO 14224:2016 Petroleum, petrochemical and natural gas industries. Collection and exchange of reliability and maintenance data for equipment
EN ISO 10438-4:2007 Petroleum, petrochemical and natural gas industries - Lubrication, shaft-sealing and control-oil systems and auxiliaries - Part 4: Self-acting gas seal support systems (ISO 10438-4:2007)
ASME PTB 1 : 2014 ASME SECTION 8 - DIVISION 2 CRITERIA AND COMMENTARY
API STD 12R1:2020+ADDENDUM 1:2021 Installation, Operation, Maintenance, Inspection, and Repair of Tanks in Production Service
PIP PCSPS001 : 2015 PACKAGED EQUIPMENT INSTRUMENTATION SPECIFICATION

ASME B31.1 : 2016 POWER PIPING
ASME PTC25 : 2014 PRESSURE RELIEF DEVICES
ASME PV CODE 8 DIV 1 : 2017 BOILER AND PRESSURE VESSEL CODE - RULES FOR CONSTRUCTION OF PRESSURE VESSELS DIVISION 1
API 2000 : 2014 VENTING ATMOSPHERIC AND LOW-PRESSURE STORAGE TANKS
ASME B31.3:2016 PROCESS PIPING
API 521 : 2014 PRESSURE-RELIEVING AND DEPRESSURING SYSTEMS
ASME PV CODE 1 : 2017 BOILER AND PRESSURE VESSEL CODE - RULES FOR CONSTRUCTION OF POWER BOILERS
ASME CODE CASE B & PV : 2017 CODE CASES: BOILERS AND PRESSURE VESSELS
API 526 : 2017 FLANGED STEEL PRESSURE-RELIEF VALVES
API 520-2 : 2015 SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 2: INSTALLATION
API 527 : 2014 SEAT TIGHTNESS OF PRESSURE RELIEF VALVES

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