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eLibrary > ASME BPVC.XIII-2025 Section XIII, Rules for Overpressure Protection >

ASME BPVC.XIII-2025 Section XIII, Rules for Overpressure Protection, 2025

TABLE OF CONTENTS
LIST OF SECTIONS
FOREWORD
STATEMENT OF POLICY ON THE USE OF THE ASME SINGLE CERTIFICATION MARK AND CODE AUTHORIZATION IN ADVERTISING
STATEMENT OF POLICY ON THE USE OF ASME MARKING TO IDENTIFY MANUFACTURED ITEMS
PERSONNEL
CORRESPONDENCE WITH THE COMMITTEE
SUMMARY OF CHANGES
CROSS-REFERENCING IN THE ASME BPVC
PART 1 GENERAL REQUIREMENTS [Go to Page]
1.1 SCOPE
1.2 ORGANIZATION
1.3 DEFINITIONS
1.4 REFERENCES
1.5 UNITS OF MEASURE
1.6 TOLERANCES
PART 2 PROTECTION AGAINST OVERPRESSURE [Go to Page]
2.1 GENERAL
2.2 RESPONSIBILITIES
2.3 SET PRESSURE
2.4 OVERPRESSURE
PART 3 REQUIREMENTS FOR PRESSURE RELIEF VALVES [Go to Page]
3.1 GENERAL [Go to Page]
3.1.1 Applicability of Part 3 Requirements
3.1.2 Valve Characteristics
3.2 DESIGN AND MECHANICAL REQUIREMENTS [Go to Page]
3.2.1 Body
3.2.2 Drains
3.2.3 Bonnet
3.2.4 Seat
3.2.5 Springs for Direct Spring-Loaded Valves
3.2.6 Guiding Arrangements
3.2.7 Lifting Device
3.2.8 Wrenching Surfaces
3.2.9 Sealing of Adjustments
3.2.10 Diaphragm-Type Direct Spring-Loaded Pressure Relief Valves
3.2.11 Restricted-Lift Designs
3.2.12 O-Rings and Packing
3.2.13 Inlet/Outlet Connections
3.2.14 Pop Action
3.3 MATERIAL REQUIREMENTS [Go to Page]
3.3.1 General
3.3.2 Seats and Disks
3.3.3 Guiding/Sliding Surfaces
3.3.4 Springs
3.4 INSPECTION OF MANUFACTURING AND/OR ASSEMBLY [Go to Page]
3.4.1 General
3.4.2 Production Certification
3.4.3 Alternative Tests for Valves That Exceed the Laboratory Capabilities
3.5 ASSEMBLER REQUIREMENTS
3.6 PRODUCTION TESTING [Go to Page]
3.6.1 Pressure Testing
3.6.2 Secondary Pressure Zone Test
3.6.3 Set Pressure Tests
3.6.4 Seat Tightness Test
3.6.5 Blowdown Testing
3.7 WELDING, BRAZING, HEAT TREATMENT, AND NONDESTRUCTIVE EXAMINATION
3.8 SET PRESSURE CHANGE
3.9 MARKING
PART 4 REQUIREMENTS FOR RUPTURE DISK DEVICES [Go to Page]
4.1 GENERAL [Go to Page]
4.1.1 Applicability of Part 4 Requirements
4.1.2 Burst Pressure
4.1.3 Relieving Capacity
4.2 DESIGN AND MECHANICAL REQUIREMENTS
4.3 MATERIAL REQUIREMENTS [Go to Page]
4.3.1 Disk Material
4.3.2 Pressure-Retaining Parts
4.4 INSPECTION OF MANUFACTURING [Go to Page]
4.4.1 General
4.4.2 Verification
4.4.3 Production Certification
4.5 PRODUCTION TESTING [Go to Page]
4.5.1 Pressure Testing
4.5.2 Burst Tests
4.6 WELDING, BRAZING, HEAT TREATMENT, AND NONDESTRUCTIVE EXAMINATION
4.7 MARKING [Go to Page]
4.7.1 General
4.7.2 Rupture Disks
4.7.3 Rupture Disk Holders
PART 5 REQUIREMENTS FOR PIN DEVICES [Go to Page]
5.1 GENERAL [Go to Page]
5.1.1 Applicability of Part 5 Requirements
5.1.2 Set Pressure
5.1.3 Relieving Capacity
5.2 DESIGN AND MECHANICAL REQUIREMENTS
5.3 MATERIAL REQUIREMENTS
5.4 INSPECTION OF MANUFACTURING [Go to Page]
5.4.1 General
5.4.2 Production Certification
5.5 PRODUCTION TESTING [Go to Page]
5.5.1 Pressure Testing
5.5.2 Set Pressure Qualification Testing
5.5.3 Seat Tightness Test
5.6 WELDING, BRAZING, HEAT TREATMENT, AND NONDESTRUCTIVE EXAMINATION
5.7 MARKING [Go to Page]
5.7.1 General
5.7.2 Pin Devices
5.7.3 Pin
PART 6 REQUIREMENTS FOR SPRING-ACTUATED NON-RECLOSING DEVICES [Go to Page]
6.1 GENERAL [Go to Page]
6.1.1 Applicability of Part 6 Requirements
6.1.2 Set Pressure
6.1.3 Relieving Capacity
6.2 DESIGN AND MECHANICAL REQUIREMENTS
6.3 MATERIAL REQUIREMENTS
6.4 INSPECTION OF MANUFACTURING [Go to Page]
6.4.1 General
6.4.2 Production Certification
6.5 PRODUCTION TESTING [Go to Page]
6.5.1 Pressure Testing
6.5.2 Set Pressure Tests
6.5.3 Seat Tightness Tests
6.6 WELDING, BRAZING, HEAT TREATMENT, AND NONDESTRUCTIVE EXAMINATION
6.7 MARKING [Go to Page]
6.7.1 General
6.7.2 Spring-Actuated Non-reclosing Devices
PART 7 REQUIREMENTS FOR TEMPERATURE AND PRESSURE RELIEF VALVES [Go to Page]
7.1 GENERAL
7.2 DESIGN AND MECHANICAL REQUIREMENTS
7.3 MATERIAL REQUIREMENTS
7.4 INSPECTION OF MANUFACTURING AND/OR ASSEMBLY
7.5 PRODUCTION TESTING
7.6 WELDING
7.7 MARKING
7.8 CERTIFICATION OF CAPACITY
PART 8 REQUIREMENTS FOR DEVICES IN COMBINATION [Go to Page]
8.1 GENERAL
8.2 RUPTURE DISK DEVICE INSTALLED BETWEEN A PRESSURE RELIEF VALVE AND THE PRESSURIZED EQUIPMENT
8.3 RUPTURE DISK DEVICE INSTALLED ON THE OUTLET SIDE OF A PRESSURE RELIEF VALVE
8.4 PIN DEVICE INSTALLED BETWEEN A PRESSURE RELIEF VALVE AND THE PRESSURIZED EQUIPMENT
8.5 MARKING
PART 9 CAPACITY AND FLOW RESISTANCE CERTIFICATION [Go to Page]
9.1 GENERAL [Go to Page]
9.1.1 General Certification Requirements
9.1.2 Test Facility and Supervision
9.1.3 Test Data Report
9.1.4 Design Changes
9.2 REQUIREMENTS FOR PRESSURE RELIEF VALVES [Go to Page]
9.2.1 Blowdown
9.2.2 Pilot-Operated Pressure Relief Valves
9.2.3 Use of V-Designated Valves for UV-Designated Applications
9.2.4 Nozzle-Type Pressure Relief Valves for Saturated Water
9.3 REQUIREMENTS FOR NON-RECLOSING PRESSURE RELIEF DEVICES
9.4 REQUIREMENTS FOR SPRING-ACTUATED NON-RECLOSING PRESSURE RELIEF DEVICES
9.5 REQUIREMENTS FOR PRESSURE RELIEF VALVES IN COMBINATION WITH NON-RECLOSING PRESSURE RELIEF DEVICES
9.6 OPTIONAL TESTING OF NON-RECLOSING PRESSURE RELIEF DEVICES AND PRESSURE RELIEF VALVES
9.7 CERTIFICATION METHODS [Go to Page]
9.7.1 Test Fluid
9.7.2 Test Pressure
9.7.3 Design Certification by the Single-Device Method
9.7.4 Design Certification by the Three-Device Method
9.7.5 Design Certification by the Four-Device Method
9.7.6 Design Certification by the Coefficient of Discharge Method
9.7.7 Flow Resistance Method
9.8 ALTERNATIVE METHODS FOR VALVES, PIN DEVICES, AND SPRING-ACTUATED NON-RECLOSING PRESSURE RELIEF DEVICES EXCEEDING THE LABORATORY CAPABILITIES
9.9 CAPACITY CERTIFICATION OF SECTION III (NV-DESIGNATED) PRESSURE RELIEF VALVES [Go to Page]
9.9.1 Certification Set Pressures of 20 kPa (3 psig) Up to but Not Including 100 kPa (15 psig)
9.9.2 Vacuum Pressure Relief Valves
9.9.3 Flow Model Testing of Valve Capacity in Excess of Test Facility Limits
9.9.4 Demonstration of Function
PART 10 AUTHORIZATION TO USE THE ASME CERTIFICATION MARK [Go to Page]
10.1 CERTIFICATION MARK
10.2 CERTIFICATES OF AUTHORIZATION
10.3 DESIGNATED OVERSIGHT
10.4 QUALITY MANAGEMENT SYSTEM
10.5 EVALUATION OF THE QUALITY MANAGEMENT SYSTEM
10.6 CERTIFIED INDIVIDUAL (CI)
10.7 CERTIFICATE OF CONFORMANCE
PART 11 REQUIREMENTS FOR OPEN FLOW PATHS OR VENTS [Go to Page]
11.1 APPLICABILITY
PART 12 INSTALLATION [Go to Page]
12.1 APPLICABILITY
12.2 GENERAL
12.3 LOCATION
12.4 RUPTURE DISK INSTALLATION
12.5 INLET PIPING SYSTEM
12.6 MOUNTING OF TWO OR MORE REQUIRED DEVICES
12.7 ORIENTATION OF PRESSURE RELIEF VALVES
12.8 DISCHARGE PIPING SYSTEM
12.9 STOP VALVES
12.10 BONNET VENTING
PART 13 RULES FOR OVERPRESSURE PROTECTION BY SYSTEM DESIGN [Go to Page]
13.1 GENERAL
13.2 PRESSURIZED EQUIPMENT FOR WHICH THE PRESSURE IS SELF-LIMITING
13.3 PRESSURIZED EQUIPMENT FOR WHICH THE PRESSURE IS NOT SELF-LIMITING
FIGURES [Go to Page]
Figure 9.9.1.2-1 Values of F for Nonchoking Flow
Figure 10.1-1 ASME Certification Mark With Designator
Figure I-2-1 Typical Curtain Areas of Pressure Relief Devices
Figure IV-1-1M Constant, C, for Gas or Vapor Related to Ratio of Specific Heats (k = cp/cv)
Figure IV-1-1 Constant, C, for Gas or Vapor Related to Ratio of Specific Heats (k = cp/cv)
Figure IV-2-1M Flow Capacity Curve for Rating Nozzle-Type Pressure Relief Devices on Saturated Water (Based on 10% Overpressure)
Figure IV-2-1 Flow Capacity Curve for Rating Nozzle-Type Pressure Relief Devices on Saturated Water (Based on 10% Overpressure)
Figure V-2.1.9-1 Recommended Arrangements for Testing Flow Resistance of Non-reclosing Pressure Relief Devices
Figure V-2.2.2.3-1 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Flowmeter Test Arrangement
Figure V-2.2.2.10-1 Recommended Internal Contours of Nozzles, Fittings, Adapters, and Reducers Between Test Vessel and Test Device
Figure V-2.2.2.10-2 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Weighed-Condensate Test Arrangement
Figure V-2.2.2.10-3 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Weighed-Water Test Arrangement
Figure V-2.2.2.10-4 Recommended Discharge Arrangement for Testing Devices With Superimposed Back Pressure
Figure V-2.2.2.10-5 Recommended Arrangement for Testing Non-reclosing Pressure Relief Devices in Combination With Pressure Relief Valves
Figure V-2.2.6.1-1 Recommended Discharge Arrangement for Testing Devices With Built-Up Back Pressure
Figure V-2.2.10.1-1 Recommended Arrangement for Conducting Opening Test on Non-reclosing Pressure Relief Devices With Incompressible Fluids
Figure V-3.2.2.2-1 Recommended Arrangement for Testing Valves With Compressible Fluids
Figure V-3.2.2.2-2 Recommended Arrangement for Testing Valves With Incompressible Fluids
Figure V-3.2.3.2-1 Field Test Accessory for Pilot-Operated Pressure Relief Valve
Figure F-1-1 Spring-Loaded Pressure Relief Valve
Figure F-1-2 Pilot-Operated Pressure Relief Valve
Figure F-1-3 Pressure Relief Valve (Yoke or Open Bonnet)
Figure F-1-4 Rupture Disk
Figure F-1-5 Nozzle
TABLES [Go to Page]
Table 1.4-1 Acceptable Edition of Standards Referenced in This Section
Table 2.1-1 Permitted Pressure Relief Devices or Methods by ASME BPVC Section
Table 3.4.2.3-1 Maximum Blowdown for Sample Valves During Testing
Table 3.6.3.1-1 Test Fluid for Set Pressure Tests
Table 3.6.3.1-2 Set Pressure Tolerances for Pressure Relief Valves
Table 9.7.2-1 Test Pressure for Certification Tests
Table IV-3-1 Molecular Weights of Gases and Vapors
Table V-1.6-1 SI (Metric) Units
Table V-1.6-2 Commonly Used Conversion Factors
Table C-1-1 Summary of Certificate of Conformance Forms
Table C-2-1 Guide for the Preparation of Manufacturer’s Certificate of Conformance Form HV-1
Table C-2-2 Supplementary Instructions for the Preparation of Manufacturer’s or Assembler’s Certificate of Conformance Forms UV-1 and UD-1
Table C-2-3 Supplementary Instructions for the Preparation of Manufacturer’s or Assembler’s Certificate of Conformance Form K-4
Table C-2-4 Supplementary Instructions for the Preparation of Manufacturer’s Certificate of Conformance Form K-5
Table C-2-5 Supplementary Instructions for the Preparation of Manufacturer’s or Assembler’s Certificate of Conformance Forms TV-1 and TD-1
Table D-2-1 Table of Uncertainty Parameters — U.S. Customary Units
Table D-2-1M Table of Uncertainty Parameters — SI Units
Table E-2.1-1 Sample Test Data
FORMS [Go to Page]
TEST REPORT FORM V-2.3.5.1-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER — U.S. Customary Units: Observed Data and Computed Results — Weighed-Water Method
TEST REPORT FORM V-2.3.5.1-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER — SI Units: Observed Data and Computed Results — Weighed-Water Method
TEST REPORT FORM V-2.3.5.2-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.2-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM — SI Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.3-1 PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.3-1M PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS — SI Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.4-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.4-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — SI Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.5-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — U.S. Customary Units: Observed Data and Computed Results — Sonic-Flow Method
TEST REPORT FORM V-2.3.5.5-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — SI Units: Observed Data and Computed Results — Sonic-Flow Method
TEST REPORT FORM V-2.3.5.6-1 PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.6-1M PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS — SI Units: Observed Data and Computed Results — Flowmeter Method
TEST REPORT FORM V-2.3.5.7-1 NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR — U.S. Customary Units: Observed Data and Computed Results — Flow Resistance
TEST REPORT FORM V-2.3.5.7-1M NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR — SI Units: Observed Data and Computed Results — Flow Resistance
TEST SUMMARY REPORT FORM V-2.4.5-1 Pressure and Relief Valve Performance Test Report: STEAM
TEST SUMMARY REPORT FORM V-2.4.5-2 Pressure and Relief Valve Performance Test Report: LIQUIDS AND WATER
TEST SUMMARY REPORT FORM V-2.4.5-3 Pressure and Relief Valve Performance Test Report: AIR, GAS, OR FUEL GAS
TEST SUMMARY REPORT FORM V-2.4.5-4 Non-reclosing Pressure Relief Device Performance Test Report: AIR, GAS, OR FUEL GAS
Form HV-1 Manufacturer’s Certificate of Conformance for Pressure Relief Valves
Form UV-1 Manufacturer’s or Assembler’s Certificate of Conformance for Pressure Relief Valves
Form UD-1 Manufacturer’s Certificate of Conformance for Nonreclosing Pressure Relief Devices
Form K-4 Manufacturer’s or Assembler’s Certificate of Conformance for Pressure Relief Valves
Form K-5 Manufacturer’s Certificate of Conformance for Rupture Disk Devices
Form TV-1 Manufacturer’s or Assembler’s Certificate of Conformance for Pressure Relief Valves
Form TD-1 Manufacturer’s Certificate of Conformance for Non-reclosing Pressure Relief Devices
MANDATORY APPENDICES [Go to Page]
MANDATORY APPENDIX I DEFINITIONS [Go to Page]
I-1 INTRODUCTION
I-2 DEFINITIONS OF TERMS
MANDATORY APPENDIX II ADHESIVE ATTACHMENT OF NAMEPLATES [Go to Page]
II-1 SCOPE
II-2 NAMEPLATE APPLICATION PROCEDURE QUALIFICATION
MANDATORY APPENDIX III QUALITY CONTROL SYSTEM [Go to Page]
III-1 GENERAL
III-2 OUTLINE OF FEATURES INCLUDED IN THE QUALITY CONTROL SYSTEM
MANDATORY APPENDIX IV CAPACITY CONVERSION [Go to Page]
IV-1 INTRODUCTION
IV-2 EQUATIONS FOR DETERMINING CAPACITY
IV-3 CAPACITY CONVERSION EXAMPLES
IV-4 EQUATIONS FOR CONVERSION (INCOMPRESSIBLE FLUIDS)
MANDATORY APPENDIX V PERFORMANCE TESTING OF PRESSURE RELIEF DEVICES [Go to Page]
ARTICLE V-I GENERAL [Go to Page]
V-1.1 OBJECT
V-1.2 SCOPE
V-1.3 MEASUREMENT UNCERTAINTY
V-1.4 GENERAL
V-1.5 NOMENCLATURE
V-1.6 SI (METRIC) UNITS AND CONVERSION FACTORS
ARTICLE V-2 CAPACITY AND FLOW RESISTANCE TESTING [Go to Page]
V-2.1 GUIDING PRINCIPLES
V-2.2 INSTRUMENTS AND METHODS OF MEASUREMENTS
V-2.3 COMPUTATION OF RESULTS
V-2.4 TEST SUMMARY REPORT FORM
ARTICLE V-3 IN-SERVICE AND BENCH TESTING [Go to Page]
V-3.1 GUIDING PRINCIPLES
V-3.2 INSTRUMENTS AND METHODS OF MEASUREMENTS
V-3.3 COMPUTATION OF RESULTS
V-3.4 TEST SUMMARY REPORT FORM
NONMANDATORY APPENDICES [Go to Page]
NONMANDATORY APPENDIX A GUIDANCE FOR THE USE OF U.S. CUSTOMARY AND SI UNITS IN THE ASME BOILER AND PRESSURE VESSEL CODE [Go to Page]
A-1 USE OF UNITS IN EQUATIONS
A-2 GUIDELINES USED TO DEVELOP SI EQUIVALENTS
A-3 SOFT CONVERSION FACTORS
NONMANDATORY APPENDIX B STOP VALVES USED IN PRESSURE RELIEF SYSTEMS [Go to Page]
B-1 INTRODUCTION
B-2 STOP VALVES LOCATED IN THE RELIEF PATH
B-3 DEFINITIONS
B-4 RESPONSIBILITIES
B-5 PROCEDURES AND MANAGEMENT SYSTEMS
B-6 STOP VALVES IN SYSTEMS WITH PRESSURE FROM AN OUTSIDE SOURCE
B-7 STOP VALVES UPSTREAM OR DOWNSTREAM OF THE PRESSURE RELIEF DEVICE
B-8 STOP VALVES IN THE PRESSURE RELIEF PATHS HANDLING PROCESS FLOW
B-9 STOP VALVES IN THE RELIEF PATHS WHERE FIRE IS SOURCE OF OVERPRESSURE
NONMANDATORY APPENDIX C GUIDE TO MANUFACTURER’S AND ASSEMBLER’S CERTIFICATES OF CONFORMANCE FOR PRESSURE RELIEF DEVICES [Go to Page]
C-1 INTRODUCTION
C-2 CERTIFICATE OF CONFORMANCE FORMS
NONMANDATORY APPENDIX D EXAMPLES OF DETERMINING FLOW RATE UNCERTAINTIES [Go to Page]
D-1 PURPOSE
D-2 EXAMPLE DETERMINATION [Go to Page]
D-2.1 Discharge Coefficient, C
D-2.2 Diameter of Orifice Plate, do
D-2.3 Diameter of Meter, D
D-2.4 Thermal Expansion Number, Fa
D-2.5 Density of Water, ρ
D-2.6 Parameter ΔP — Differential Pressure Head Across Meter, in. (mm) Water
D-2.7 Uncertainty Calculation
NONMANDATORY APPENDIX E EXAMPLE OF PRESSURE TAP PROFILE COMPARISON [Go to Page]
E-1 PURPOSE
E-2 EXAMPLE DETERMINATION [Go to Page]
E-2.1 Sample Data
E-2.2 Calculations
NONMANDATORY APPENDIX F DESIGN GUIDELINES FOR PRESSURE-CONTAINING AND PRESSURE-RETAINING SHELL PARTS OF PRESSURE RELIEF DEVICES [Go to Page]
F-1 Introduction
F-2 Allowable Stress Values
F-3 Body
F-4 Pressure-Containing Bonnet
F-5 Non-Pressure-Containing Yoke or Open Bonnet
F-6 Cover of a Pilot-Operated Pressure Relief Valve
F-7 Nozzle
F-8 Cap
F-9 Body-to-Bonnet and Yoke-Bolted Joints in a Spring-Loaded Pressure Relief Valve
F-10 Body-to-Cover Bolted Joint in a Pilot-Operated Pressure Relief Valve
F-11 Rupture Disk Holder
F-12 Finite Element Analysis
F-13 Exceptions [Go to Page]

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