ASME PTC 25 2023

$75.42

ASME PTC 25-2023 Pressure Relief Devices

Published By	Publication Date	Number of Pages
ASME	2023

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Category: ASME

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Description

The object of the test is to determine the performance of pressure relief devices. These tests determine one or more of the following: (a) dimensional, operational, and mechanical characteristics (b) relieving pressure (c) relieving flow capacity at test pressure (d) individual flow resistance Procedures for conducting the tests, calculating the results, and making corrections are defined.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
8	NOTICE
9	FOREWORD
10	ASME PTC COMMITTEE ROSTER
11	CORRESPONDENCE WITH THE PTC COMMITTEE
13	INTRODUCTION
14	PART I GENERAL Section 1 Object and Scope 1-1 OBJECT 1-2 SCOPE 1-3 MEASUREMENT UNCERTAINTY 1-4 GENERAL
16	Section 2 Definitions and Description of Terms 2-1 PURPOSE 2-2 GENERAL 2-3 TYPES OF DEVICES 2-3.1 Reclosing Pressure-Relieving Devices
17	2-3.2 Non-reclosing Pressure Relief Device 2-4 PARTS OF PRESSURE RELIEF DEVICES
18	2-5 DIMENSIONAL CHARACTERISTICS — PRESSURE RELIEF VALVES
19	Figures Figure 2-5-1 Typical Curtain Areas of Pressure Relief Valves
20	2-6 DIMENSIONAL CHARACTERISTICS — NON-RECLOSING PRESSURE RELIEF DEVICES 2-7 OPERATIONAL CHARACTERISTICS OF PRESSURE RELIEF DEVICES
22	2-8 DESCRIPTION OF TERMS
24	PART II FLOW CAPACITY TESTING Section 3 Guiding Principles 3-1 ITEMS ON WHICH AGREEMENT SHALL BE REACHED 3-2 QUALIFICATION OF PERSON SUPERVISING THE TEST 3-3 RESPONSIBILITY OF PERSON SUPERVISING THE TEST 3-4 TEST APPARATUS 3-5 PRELIMINARY TESTS 3-6 SPARE INSTRUMENTS 3-7 CALIBRATION OF INSTRUMENTS 3-7.1 Pressure
25	3-7.2 Temperature 3-7.3 Lift Indicators and Recorders 3-7.4 Weighing Scales 3-7.5 Steam Calorimeters 3-8 METERING SECTIONS 3-9 FLOW RESISTANCE TEST RIGS 3-9.1 Measured Flow Resistance 3-9.2 Pressure Tap Profile Comparison
26	3-10 ADJUSTMENTS DURING TESTS 3-11 RECORDS AND TEST RESULTS 3-12 MEASUREMENT UNCERTAINTY
27	Figure 3-9-1 Recommended Arrangements for Testing Non-reclosing Pressure Relief Device Flow Resistance
28	Section 4 Instruments and Methods of Measurements 4-1 GENERAL 4-2 FLUID CONDITIONS, TEST CONDITIONS, AND INSTRUMENTATION 4-2.1 Atmospheric Pressure 4-2.2 Temperature
29	4-2.3 Pressure Measurements 4-2.4 Flow Measurement Figure 4-2.3-1 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Flowmeter Test Arrangement
30	4-2.5 Valve-Lift Measurements 4-2.6 Steam Quality 4-2.7 Reference Conditions for Which Corrections May Be Applied 4-2.8 Specific Gravity 4-2.9 Chemical Composition 4-2.10 General Features of Tests
31	4-2.11 Establishing Set Pressure and Blowdown 4-3 TESTING WITH STEAM, PRESSURE RELIEF DEVICE DISCHARGING TO ATMOSPHERIC PRESSURE 4-3.1 Test Arrangements
32	Figure 4-2.10-1 Recommended Internal Contours of Nozzles, Fittings, Adapters, and Reducers Between Test Vessel and Test Device
33	Figure 4-2.10-2 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Weighed-Condensate Test Arrangement Figure 4-2.10-3 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure — Weighed-Water Test Arrangement
34	Figure 4-2.10-4 Recommended Discharge Arrangement for Testing Devices With Superimposed Back Pressure Figure 4-2.10-5 Recommended Arrangement for Testing Non-reclosing Pressure Relief Devices in Combination With Pressure Relief Valves
35	4-3.2 Preliminary Tests 4-3.3 Barometric Pressure 4-3.4 Details of Procedure for Flow Measurement of Devices Using the Flowmeter Method 4-3.5 Details of Procedure for Flow Measurement of Devices Using the Weighed-Condensate Method 4-3.6 Observation of the Device Mechanical Characteristics 4-3.7 Recording Additional Data 4-4 TESTING WITH GAS OR AIR, PRESSURE RELIEF DEVICE DISCHARGING TO ATMOSPHERIC PRESSURE 4-4.1 Test Arrangement
36	4-4.2 Preliminary Device Tests 4-4.3 Barometric Pressure 4-4.4 Details of Procedure for Flow Measurement of Devices Using Subsonic-Inferential-Meter Method 4-4.5 Details of Procedure for Flow Measurement of Devices Using Sonic-Inferential-Meter Method 4-4.6 Observation of the Mechanical Characteristics 4-4.7 Recording Additional Data 4-5 TESTING WITH LIQUIDS, PRESSURE RELIEF DEVICE DISCHARGING TO ATMOSPHERIC PRESSURE 4-5.1 Test Arrangements 4-5.2 Preliminary Tests
37	4-5.3 Details of Procedure for Flow Measurement of Devices Using the Flowmeter Method 4-5.4 Details of Procedure for Flow Measurement of Devices Using the Volumetric or Gravimetric Method 4-5.5 Observation of Mechanical Characteristics 4-5.6 Recording Additional Data 4-6 TESTING WITH STEAM, WITH BACK PRESSURE ABOVE ATMOSPHERIC 4-6.1 Test Arrangements 4-6.2 Preliminary Tests 4-6.3 Barometric Pressure 4-6.4 Details of Procedure for Flow Measurement
38	4-6.5 Testing With Superimposed Back Pressure [See Para. 4-6.1(a)] 4-6.6 Testing With Built-Up Back Pressure [See Para. 4-6.1(b)] Figure 4-6.1-1 Recommended Discharge Arrangement for Testing Devices With Built-Up Back Pressure
39	4-6.7 Observation of Mechanical Characteristics 4-6.8 Recording Additional Data 4-7 TESTING WITH GAS OR AIR, WITH BACK PRESSURE ABOVE ATMOSPHERIC 4-7.1 Test Arrangements 4-7.2 Preliminary Tests 4-7.3 Barometric Pressure 4-7.4 Details of Procedure for Flow Measurement 4-7.5 Testing With Superimposed Back Pressure [See Para. 4-7.1(a)]
40	4-7.6 Testing With Built-Up Back Pressure [See Para. 4-7.1(b)] 4-7.7 Observation of Mechanical Characteristics 4-7.8 Recording Additional Data 4-8 TESTING WITH LIQUIDS, WITH BACK PRESSURE ABOVE ATMOSPHERIC 4-8.1 Test Arrangements 4-8.2 Preliminary Tests 4-8.3 Details of Procedure for Flow Measurement 4-8.4 Testing With Superimposed Back Pressure (See Figure 4-2.10-4)
41	4-8.5 Testing With Built-Up Back Pressure (See Figure 4-6.1-1) 4-8.6 Tests With Built-Up Back Pressure With Measuring Tank 4-8.7 Observation of Mechanical Characteristics 4-8.8 Recording Additional Data 4-9 TESTING WITH GAS OR AIR, NON-RECLOSING PRESSURE RELIEF DEVICE FLOW RESISTANCE METHOD 4-9.1 Test Arrangement
42	4-9.2 Preliminary Tests 4-9.3 Barometric Pressure 4-9.4 Details of Procedure for Flow Resistance Measurement Using Subsonic-Inferential-Meter Method 4-9.5 Details of Procedure for Flow Resistance Measurement Using Sonic-Inferential-Meter Method 4-9.6 Recording Additional Data 4-9.7 Resistance Testing on Non-reclosing Pressure Relief Devices With Connections Not Compatible With Figure 3-9-1 4-10 TESTING NON-RECLOSING PRESSURE RELIEF DEVICES TO DETERMINE A SET PRESSURE FOR INCOMPRESSIBLE FLUIDS 4-10.1 Test Arrangement
43	4-10.2 Preliminary Test 4-10.3 Details of Procedure for Determining a Non-reclosing Pressure Relief Device Flow Resistance Factor Applicable for Incompressible Fluids
44	Figure 4-10.1-1 Recommended Arrangement for Conducting Opening Test on Non-reclosing Pressure Relief Devices With Incompressible Fluids
45	Section 5 Computation of Results 5-1 CORRECTION OF MEASURED VARIABLES 5-2 REVIEW OF INSTRUMENT READINGS 5-3 USE OF EQUATION SYMBOLS 5-4 DENSITY 5-5 CAPACITY CALCULATIONS
46	5-5.1 Volumetric or Weighed-Water Method 5-5.2 Steam — Flowmeter Method 5-5.3 Liquids — Flowmeter Method 5-5.4 Air or Gas — Flowmeter Method
47	5-5.5 Air or Gas — Sonic-Flow Method 5-5.6 Fuel-Gas Flow — Flowmeter Method 5-5.7 Air or Gas — Non-reclosing Pressure Relief Device Flow Resistance Method
48	Forms TEST REPORT FORM 5-5.1-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER — U.S. Customary Units: Observed Data and Computed Results — Weighed-Water Method
49	TEST REPORT FORM 5-5.1-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER — SI Units: Observed Data and Computed Results — Weighed-Water Method
50	TEST REPORT FORM 5-5.2-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
52	TEST REPORT FORM 5-5.2-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM — SI Units: Observed Data and Computed Results — Flowmeter Method
54	TEST REPORT FORM 5-5.3-1 PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
55	TEST REPORT FORM 5-5.3-1M PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS — SI Units: Observed Data and Computed Results — Flowmeter Method
56	TEST REPORT FORM 5-5.4-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
58	TEST REPORT FORM 5-5.4-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — SI Units: Observed Data and Computed Results — Flowmeter Method
60	TEST REPORT FORM 5-5.5-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — U.S. Customary Units: Observed Data and Computed Results — Sonic-Flow Method
61	TEST REPORT FORM 5-5.5-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS — SI Units: Observed Data and Computed Results — Sonic-Flow Method
62	TEST REPORT FORM 5-5.6-1 PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS — U.S. Customary Units: Observed Data and Computed Results — Flowmeter Method
64	TEST REPORT FORM 5-5.6-1M PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS — SI Units: Observed Data and Computed Results — Flowmeter Method
66	TEST REPORT FORM 5-5.7-1 NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR — U.S. Customary Units: Observed Data and Computed Results — Flow Resistance
68	TEST REPORT FORM 5-5.7-1M NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR — SI Units: Observed Data and Computed Results — Flow Resistance
70	Section 6 Test Summary Report Form 6-1 GENERAL INSTRUCTIONS 6-2 PART I: GENERAL INFORMATION 6-3 PART II: SUMMARY OF RESULTS 6-4 PART III: DESCRIPTION OF DEVICE UNDER TEST 6-5 PART IV: OBSERVED DATA AND COMPUTED RESULTS
71	6-6 PART V: TEST CONDITIONS AND CORRECTIONS AGREEMENTS 6-7 PART VI: TEST METHODS AND PROCEDURES 6-8 PART VII: SUPPORTING DATA 6-9 PART VIII: GRAPHICAL PRESENTATION OF BACK-PRESSURE TEST RESULTS
72	TEST SUMMARY REPORT FORM 6-5-1 Pressure and Relief Valve Performance Test Report: STEAM
73	TEST SUMMARY REPORT FORM 6-5-2 Pressure and Relief Valve Performance Test Report: LIQUIDS AND WATER
74	TEST SUMMARY REPORT FORM 6-5-3 Pressure and Relief Valve Performance Test Report: AIR, GAS, OR FUEL GAS
75	TEST SUMMARY REPORT FORM 6-5-4 Non-reclosing Pressure Relief Device Performance Test Report: AIR, GAS, OR FUEL GAS
76	PART III IN-SERVICE AND BENCH TESTING Section 7 Guiding Principles 7-1 ITEMS ON WHICH AGREEMENT SHALL BE REACHED 7-2 QUALIFICATION OF PERSON CONDUCTING THE TEST 7-3 RESPONSIBILITY OF PERSON CONDUCTING THE TEST 7-4 TEST APPARATUS 7-5 PRELIMINARY TRAINING 7-6 SPARE INSTRUMENTS 7-7 CALIBRATION OF INSTRUMENTS 7-7.1 Pressure
77	7-7.2 Temperature 7-7.3 Force 7-8 ADJUSTMENTS DURING TEST 7-9 RECORDS AND TEST RESULTS 7-10 MEASUREMENT UNCERTAINTY
78	Section 8 Instruments and Methods of Measurements 8-1 GENERAL 8-2 INSTRUMENTATION 8-2.1 Temperature 8-2.2 Pressure Measurements
79	Figure 8-2.2-1 Recommended Arrangement for Testing Valves With Compressible Fluids
80	Figure 8-2.2-2 Recommended Arrangement for Testing Valves With Incompressible Fluids
81	8-2.3 Valve-Lift Measurements 8-3 IN-SERVICE TESTING PROCEDURES 8-3.1 General Features of Tests 8-3.2 Test Methods
82	8-3.3 In-Service Verification of Pressure-Relieving Capacity Figure 8-3.2-1 Pilot-Operated Pressure Relief Valve Field Test Accessory
83	8-4 BENCH TESTING PROCEDURES 8-4.1 General Features of Tests 8-4.2 Compressible Fluids 8-4.3 Incompressible Fluids 8-5 SEAT TIGHTNESS TEST
84	Section 9 Computation of Results 9-1 CORRECTION OF MEASURED VARIABLES 9-2 REVIEW OF INSTRUMENT READINGS 9-3 COMPUTATION OF OPERATIONAL CHARACTERISTICS 9-3.1 Set Pressure 9-3.2 Blowdown 9-3.3 Lift
85	Section 10 Test Summary Report Form 10-1 GENERAL INSTRUCTIONS 10-2 PART I: GENERAL INFORMATION 10-3 PART II: SUMMARY OF RESULTS 10-4 PART III: DESCRIPTION OF VALVE UNDER TEST 10-5 PART IV: OBSERVED DATA AND COMPUTED RESULTS 10-6 PART V: CONTRACT AND AGREED TEST CONDITIONS CORRECTIONS 10-7 PART VI: TEST METHODS AND PROCEDURES 10-8 PART VII: SUPPORTING DATA
87	MANDATORY APPENDIX I SI (METRIC) UNITS AND CONVERSION FACTORS
88	Tables Table I-1 SI (Metric) Units
89	Table I-2 Commonly Used Conversion Factors
90	MANDATORY APPENDIX II EXAMPLES OF DETERMINING FLOW RATE UNCERTAINTIES II-1 PURPOSE II-2 EXAMPLE DETERMINATION II-2.1 Parameter C — Discharge Coefficient
91	Table II-2-1 Table of Uncertainty Parameters — U.S. Customary Units Table II-2-1M Table of Uncertainty Parameters — SI Units II-2.2 Parameter do — Diameter of Orifice Plate II-2.3 Parameter D — Diameter of Meter II-2.4 Parameter Fa — Thermal ExpansionNumber
92	II-2.5 Parameter ρ — Density of Water II-2.6 Parameter ΔP — Differential Pressure Head Across Meter, in. (mm) Water
93	II-2.7 Uncertainty Calculation
95	II-3 REFERENCES
96	Table III-2.1-1 Sample Test Data MANDATORY APPENDIX III EXAMPLE OF PRESSURE TAP PROFILE COMPARISON III-1 PURPOSE III-2 EXAMPLE DETERMINATION III-2.1 Sample Data
97	III-2.2 Calculations
106	NONMANDATORY APPENDIX A REFERENCES