{"id":450502,"date":"2024-10-20T09:11:24","date_gmt":"2024-10-20T09:11:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-ptc-25-2023\/"},"modified":"2024-10-26T17:08:47","modified_gmt":"2024-10-26T17:08:47","slug":"asme-ptc-25-2023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-ptc-25-2023\/","title":{"rendered":"ASME PTC 25 2023"},"content":{"rendered":"

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.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
8<\/td>\nNOTICE <\/td>\n<\/tr>\n
9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
10<\/td>\nASME PTC COMMITTEE ROSTER <\/td>\n<\/tr>\n
11<\/td>\nCORRESPONDENCE WITH THE PTC COMMITTEE <\/td>\n<\/tr>\n
13<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
14<\/td>\nPART I GENERAL
Section 1 Object and Scope
1-1 OBJECT
1-2 SCOPE
1-3 MEASUREMENT UNCERTAINTY
1-4 GENERAL <\/td>\n<\/tr>\n
16<\/td>\nSection 2 Definitions and Description of Terms
2-1 PURPOSE
2-2 GENERAL
2-3 TYPES OF DEVICES
2-3.1 Reclosing Pressure-Relieving Devices <\/td>\n<\/tr>\n
17<\/td>\n2-3.2 Non-reclosing Pressure Relief Device
2-4 PARTS OF PRESSURE RELIEF DEVICES <\/td>\n<\/tr>\n
18<\/td>\n2-5 DIMENSIONAL CHARACTERISTICS \u2014 PRESSURE RELIEF VALVES <\/td>\n<\/tr>\n
19<\/td>\nFigures
Figure 2-5-1 Typical Curtain Areas of Pressure Relief Valves <\/td>\n<\/tr>\n
20<\/td>\n2-6 DIMENSIONAL CHARACTERISTICS \u2014 NON-RECLOSING PRESSURE RELIEF DEVICES
2-7 OPERATIONAL CHARACTERISTICS OF PRESSURE RELIEF DEVICES <\/td>\n<\/tr>\n
22<\/td>\n2-8 DESCRIPTION OF TERMS <\/td>\n<\/tr>\n
24<\/td>\nPART 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 <\/td>\n<\/tr>\n
25<\/td>\n3-7.2 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 <\/td>\n<\/tr>\n
26<\/td>\n3-10 ADJUSTMENTS DURING TESTS
3-11 RECORDS AND TEST RESULTS
3-12 MEASUREMENT UNCERTAINTY <\/td>\n<\/tr>\n
27<\/td>\nFigure 3-9-1 Recommended Arrangements for Testing Non-reclosing Pressure Relief Device Flow Resistance <\/td>\n<\/tr>\n
28<\/td>\nSection 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 <\/td>\n<\/tr>\n
29<\/td>\n4-2.3 Pressure Measurements
4-2.4 Flow Measurement
Figure 4-2.3-1 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure \u2014 Flowmeter Test Arrangement <\/td>\n<\/tr>\n
30<\/td>\n4-2.5 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 <\/td>\n<\/tr>\n
31<\/td>\n4-2.11 Establishing Set Pressure and Blowdown
4-3 TESTING WITH STEAM, PRESSURE RELIEF DEVICE DISCHARGING TO ATMOSPHERIC PRESSURE
4-3.1 Test Arrangements <\/td>\n<\/tr>\n
32<\/td>\nFigure 4-2.10-1 Recommended Internal Contours of Nozzles, Fittings, Adapters, and Reducers Between Test Vessel and Test Device <\/td>\n<\/tr>\n
33<\/td>\nFigure 4-2.10-2 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure \u2014 Weighed-Condensate Test Arrangement
Figure 4-2.10-3 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure \u2014 Weighed-Water Test Arrangement <\/td>\n<\/tr>\n
34<\/td>\nFigure 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 <\/td>\n<\/tr>\n
35<\/td>\n4-3.2 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 <\/td>\n<\/tr>\n
36<\/td>\n4-4.2 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 <\/td>\n<\/tr>\n
37<\/td>\n4-5.3 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 <\/td>\n<\/tr>\n
38<\/td>\n4-6.5 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 <\/td>\n<\/tr>\n
39<\/td>\n4-6.7 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)] <\/td>\n<\/tr>\n
40<\/td>\n4-7.6 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) <\/td>\n<\/tr>\n
41<\/td>\n4-8.5 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 <\/td>\n<\/tr>\n
42<\/td>\n4-9.2 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 <\/td>\n<\/tr>\n
43<\/td>\n4-10.2 Preliminary Test
4-10.3 Details of Procedure for Determining a Non-reclosing Pressure Relief Device Flow Resistance Factor Applicable for Incompressible Fluids <\/td>\n<\/tr>\n
44<\/td>\nFigure 4-10.1-1 Recommended Arrangement for Conducting Opening Test on Non-reclosing Pressure Relief Devices With Incompressible Fluids <\/td>\n<\/tr>\n
45<\/td>\nSection 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 <\/td>\n<\/tr>\n
46<\/td>\n5-5.1 Volumetric or Weighed-Water Method
5-5.2 Steam \u2014 Flowmeter Method
5-5.3 Liquids \u2014 Flowmeter Method
5-5.4 Air or Gas \u2014 Flowmeter Method <\/td>\n<\/tr>\n
47<\/td>\n5-5.5 Air or Gas \u2014 Sonic-Flow Method
5-5.6 Fuel-Gas Flow \u2014 Flowmeter Method
5-5.7 Air or Gas \u2014 Non-reclosing Pressure Relief Device Flow Resistance Method <\/td>\n<\/tr>\n
48<\/td>\nForms
TEST REPORT FORM 5-5.1-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Weighed-Water Method <\/td>\n<\/tr>\n
49<\/td>\nTEST REPORT FORM 5-5.1-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER \u2014 SI Units: Observed Data and Computed Results \u2014 Weighed-Water Method <\/td>\n<\/tr>\n
50<\/td>\nTEST REPORT FORM 5-5.2-1 PRESSURE RELIEF DEVICE TESTED WITH STEAM \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
52<\/td>\nTEST REPORT FORM 5-5.2-1M PRESSURE RELIEF DEVICE TESTED WITH STEAM \u2014 SI Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
54<\/td>\nTEST REPORT FORM 5-5.3-1 PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
55<\/td>\nTEST REPORT FORM 5-5.3-1M PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS \u2014 SI Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
56<\/td>\nTEST REPORT FORM 5-5.4-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
58<\/td>\nTEST REPORT FORM 5-5.4-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS \u2014 SI Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
60<\/td>\nTEST REPORT FORM 5-5.5-1 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Sonic-Flow Method <\/td>\n<\/tr>\n
61<\/td>\nTEST REPORT FORM 5-5.5-1M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS \u2014 SI Units: Observed Data and Computed Results \u2014 Sonic-Flow Method <\/td>\n<\/tr>\n
62<\/td>\nTEST REPORT FORM 5-5.6-1 PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
64<\/td>\nTEST REPORT FORM 5-5.6-1M PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS \u2014 SI Units: Observed Data and Computed Results \u2014 Flowmeter Method <\/td>\n<\/tr>\n
66<\/td>\nTEST REPORT FORM 5-5.7-1 NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR \u2014 U.S. Customary Units: Observed Data and Computed Results \u2014 Flow Resistance <\/td>\n<\/tr>\n
68<\/td>\nTEST REPORT FORM 5-5.7-1M NON-RECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR \u2014 SI Units: Observed Data and Computed Results \u2014 Flow Resistance <\/td>\n<\/tr>\n
70<\/td>\nSection 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 <\/td>\n<\/tr>\n
71<\/td>\n6-6 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 <\/td>\n<\/tr>\n
72<\/td>\nTEST SUMMARY REPORT FORM 6-5-1 Pressure and Relief Valve Performance Test Report: STEAM <\/td>\n<\/tr>\n
73<\/td>\nTEST SUMMARY REPORT FORM 6-5-2 Pressure and Relief Valve Performance Test Report: LIQUIDS AND WATER <\/td>\n<\/tr>\n
74<\/td>\nTEST SUMMARY REPORT FORM 6-5-3 Pressure and Relief Valve Performance Test Report: AIR, GAS, OR FUEL GAS <\/td>\n<\/tr>\n
75<\/td>\nTEST SUMMARY REPORT FORM 6-5-4 Non-reclosing Pressure Relief Device Performance Test Report: AIR, GAS, OR FUEL GAS <\/td>\n<\/tr>\n
76<\/td>\nPART 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 <\/td>\n<\/tr>\n
77<\/td>\n7-7.2 Temperature
7-7.3 Force
7-8 ADJUSTMENTS DURING TEST
7-9 RECORDS AND TEST RESULTS
7-10 MEASUREMENT UNCERTAINTY <\/td>\n<\/tr>\n
78<\/td>\nSection 8 Instruments and Methods of Measurements
8-1 GENERAL
8-2 INSTRUMENTATION
8-2.1 Temperature
8-2.2 Pressure Measurements <\/td>\n<\/tr>\n
79<\/td>\nFigure 8-2.2-1 Recommended Arrangement for Testing Valves With Compressible Fluids <\/td>\n<\/tr>\n
80<\/td>\nFigure 8-2.2-2 Recommended Arrangement for Testing Valves With Incompressible Fluids <\/td>\n<\/tr>\n
81<\/td>\n8-2.3 Valve-Lift Measurements
8-3 IN-SERVICE TESTING PROCEDURES
8-3.1 General Features of Tests
8-3.2 Test Methods <\/td>\n<\/tr>\n
82<\/td>\n8-3.3 In-Service Verification of Pressure-Relieving Capacity
Figure 8-3.2-1 Pilot-Operated Pressure Relief Valve Field Test Accessory <\/td>\n<\/tr>\n
83<\/td>\n8-4 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 <\/td>\n<\/tr>\n
84<\/td>\nSection 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 <\/td>\n<\/tr>\n
85<\/td>\nSection 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 <\/td>\n<\/tr>\n
87<\/td>\nMANDATORY APPENDIX I SI (METRIC) UNITS AND CONVERSION FACTORS <\/td>\n<\/tr>\n
88<\/td>\nTables
Table I-1 SI (Metric) Units <\/td>\n<\/tr>\n
89<\/td>\nTable I-2 Commonly Used Conversion Factors <\/td>\n<\/tr>\n
90<\/td>\nMANDATORY APPENDIX II EXAMPLES OF DETERMINING FLOW RATE UNCERTAINTIES
II-1 PURPOSE
II-2 EXAMPLE DETERMINATION
II-2.1 Parameter C \u2014 Discharge Coefficient <\/td>\n<\/tr>\n
91<\/td>\nTable II-2-1 Table of Uncertainty Parameters \u2014 U.S. Customary Units
Table II-2-1M Table of Uncertainty Parameters \u2014 SI Units
II-2.2 Parameter do \u2014 Diameter of Orifice Plate
II-2.3 Parameter D \u2014 Diameter of Meter
II-2.4 Parameter Fa \u2014 Thermal ExpansionNumber <\/td>\n<\/tr>\n
92<\/td>\nII-2.5 Parameter \u03c1 \u2014 Density of Water
II-2.6 Parameter \u0394P \u2014 Differential Pressure Head
\nAcross Meter, in. (mm) Water <\/td>\n<\/tr>\n
93<\/td>\nII-2.7 Uncertainty Calculation <\/td>\n<\/tr>\n
95<\/td>\nII-3 REFERENCES <\/td>\n<\/tr>\n
96<\/td>\nTable 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 <\/td>\n<\/tr>\n
97<\/td>\nIII-2.2 Calculations <\/td>\n<\/tr>\n
106<\/td>\nNONMANDATORY APPENDIX A REFERENCES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME PTC 25-2023 Pressure Relief Devices<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASME<\/b><\/a><\/td>\n2023<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":450505,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-450502","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-asme","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/450502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/450505"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=450502"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=450502"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=450502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}