{"id":197853,"date":"2024-10-19T12:35:43","date_gmt":"2024-10-19T12:35:43","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-ptc-25-2018\/"},"modified":"2024-10-25T05:09:08","modified_gmt":"2024-10-25T05:09:08","slug":"asme-ptc-25-2018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-ptc-25-2018\/","title":{"rendered":"ASME PTC 25 2018"},"content":{"rendered":"

(a) This Code provides instructions in Part II for flow capacity testing and in Part III for in-service and bench testing. Testing of reclosing and nonreclosing pressure relief devices is conducted under various inlet and outlet conditions using steam, gases, and liquids for which valid physical properties are known. (b) The validity of tests shall be determined in accordance to the requirements of subsection 1-3.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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>\n INTRODUCTION <\/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 Nonreclosing 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>\n2-6 DIMENSIONAL CHARACTERISTICS \u2014 NONRECLOSING PRESSURE RELIEF DEVICES
2-7 OPERATIONAL CHARACTERISTICS OF PRESSURE RELIEF DEVICES <\/td>\n<\/tr>\n
20<\/td>\nFigures
Figure 2-5-1 Typical Curtain Areas of Pressure Relief Valves <\/td>\n<\/tr>\n
21<\/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 Nonreclosing Pressure Relief Device Flow Resistance
Figure 3-9-1 Recommended Arrangements for Testing Nonreclosing 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>\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
Figure 4-2.10-1 Recommended Internal Contours of Nozzles, Fittings, Adapter, and Reducers Between Test Vessel and Test Device <\/td>\n<\/tr>\n
33<\/td>\n4-3.5 Details of Procedure for Flow Measurement of Devices Using the Weighed-Condensate Method
Figure 4-2.10-2 Recommended Arrangements for Testing Devices With Atmospheric Back Pressure \u2014 Weighed-Condensate Test Arrangement
Figure 4-2.10-3 RecommendedArrangements 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 Nonreclosing Pressure Relief Devices in Combination With Pressure Relief Valves <\/td>\n<\/tr>\n
35<\/td>\n4-3.6 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
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 <\/td>\n<\/tr>\n
36<\/td>\n4-5 TESTING WITH LIQUIDS, PRESSURE RELIEF DEVICES DISCHARGING TO ATMOSPHERIC PRESSURE
4-5.1 Test Arrangements
4-5.2 Preliminary Tests
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 <\/td>\n<\/tr>\n
37<\/td>\n4-6 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
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)] <\/td>\n<\/tr>\n
38<\/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
Figure 4-6-1 Recommended Discharge Arrangement for Testing Devices With Built-Up Back Pressure <\/td>\n<\/tr>\n
39<\/td>\n4-7.3 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)]
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 <\/td>\n<\/tr>\n
40<\/td>\n4-8 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)
4-8.5 Testing With Built-Up Back Pressure (See Figure 4-6-1) <\/td>\n<\/tr>\n
41<\/td>\n4-8.6 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, NONRECLOSING PRESSURE RELIEF DEVICE FLOW RESISTANCE METHOD
4-9.1 Test Arrangement
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 <\/td>\n<\/tr>\n
42<\/td>\n4-9.6 Recording Additional Data
4-9.7 Resistance Testing on Nonreclosing Pressure Relief Devices With Connections Not Compatible With Figure 3-9-1
4-10 TESTING NONRECLOSING PRESSURE RELIEF DEVICES TO DETERMINE A SET PRESSURE FOR INCOMPRESSIBLE FLUIDS
4-10.1 Test Arrangement
4-10.2 Preliminary Test
4-10.3 Details of Procedure for Determining a Nonreclosing Pressure Relief Device Flow Resistance Factor Applicable for Incompressible Fluids <\/td>\n<\/tr>\n
43<\/td>\nFigure 4-10-1 Recommended Arrangement for Conducting Opening Test on Nonreclosing Pressure Relief Devices With Incompressible Fluids <\/td>\n<\/tr>\n
44<\/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
5-5.1 Volumetric or Weighed-Water Method <\/td>\n<\/tr>\n
45<\/td>\n5-5.2 Steam \u2014 Flowmeter Method
5-5.3 Liquids \u2014 Flowmeter Method
5-5.4 Air or Gas \u2014 Flowmeter Method
5-5.5 Air or Gas \u2014 Sonic-Flow Method <\/td>\n<\/tr>\n
46<\/td>\n5-5.6 Fuel-Gas Flow \u2014 Flowmeter Method
5-5.7 Air or Gas \u2014 Nonreclosing Pressure Relief Device Flow Resistance Method <\/td>\n<\/tr>\n
47<\/td>\nForms
TEST REPORT FORM 5-5.1 PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER <\/td>\n<\/tr>\n
48<\/td>\nTEST REPORT FORM 5-5.1M PRESSURE RELIEF DEVICE TESTED WITH STEAM AND WATER <\/td>\n<\/tr>\n
49<\/td>\nTEST REPORT FORM 5-5.2 PRESSURE RELIEF DEVICE TESTED WITH STEAM <\/td>\n<\/tr>\n
51<\/td>\nTEST REPORT FORM 5-5.2M PRESSURE RELIEF DEVICE TESTED WITH STEAM <\/td>\n<\/tr>\n
53<\/td>\nTEST REPORT FORM 5-5.3 PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS <\/td>\n<\/tr>\n
54<\/td>\nTEST REPORT FORM 5-5.3M PRESSURE RELIEF DEVICE TESTED WITH LIQUIDS <\/td>\n<\/tr>\n
55<\/td>\nTEST REPORT FORM 5-5.4 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS <\/td>\n<\/tr>\n
57<\/td>\nTEST REPORT FORM 5-5.4M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS <\/td>\n<\/tr>\n
59<\/td>\nTEST REPORT FORM 5-5.5 PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS <\/td>\n<\/tr>\n
60<\/td>\nTEST REPORT FORM 5-5.5M PRESSURE RELIEF DEVICE TESTED WITH AIR OR GAS <\/td>\n<\/tr>\n
61<\/td>\nTEST REPORT 5-5.6 PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS <\/td>\n<\/tr>\n
63<\/td>\nTEST REPORT 5-5.6M PRESSURE RELIEF DEVICE TESTED WITH FUEL GAS <\/td>\n<\/tr>\n
65<\/td>\nTEST REPORT FORM 5-5.7 NONRECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR <\/td>\n<\/tr>\n
67<\/td>\nTEST REPORT FORM 5-5.7M NONRECLOSING PRESSURE RELIEF DEVICE TESTED WITH AIR <\/td>\n<\/tr>\n
69<\/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
70<\/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
71<\/td>\nTEST SUMMARY REPORT FORM 6-5.1 Pressure and Relief Valve Performance Test Report: STEAM <\/td>\n<\/tr>\n
72<\/td>\nTEST SUMMARY REPORT FORM 6-5.2 Pressure and Relief Valve Performance Test Report: LIQUIDS AND WATER <\/td>\n<\/tr>\n
73<\/td>\nTEST SUMMARY REPORT FORM 6-5.3 Pressure and Relief Valve Performance Test Report: AIR, GAS, OR FUEL GAS <\/td>\n<\/tr>\n
74<\/td>\nTEST SUMMARY REPORT FORM 6-5.4 Nonreclosing Pressure Relief Device Performance Test Report: AIR, GAS, OR FUEL GAS <\/td>\n<\/tr>\n
75<\/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
76<\/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
77<\/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
78<\/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
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>\n8-3.3 In-Service Verification of Pressure-Relieving Capacity
Figure 8-3.2-1 Pilot-Operated Pressure Relief Valve Field Test Accessory <\/td>\n<\/tr>\n
82<\/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
83<\/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
84<\/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
86<\/td>\nMANDATORY APPENDIX I SI (METRIC) UNITS AND CONVERSION FACTORS <\/td>\n<\/tr>\n
87<\/td>\nTables
Table I-1 SI (Metric) Units <\/td>\n<\/tr>\n
88<\/td>\nTable I-2 Commonly Used Conversion Factors <\/td>\n<\/tr>\n
89<\/td>\nMANDATORY APPENDIX II EXAMPLES OF DETERMINING FLOW RATE UNCERTAINTIES
II-1 PURPOSE
II-2 EXAMPLE DETERMINATION <\/td>\n<\/tr>\n
90<\/td>\nTable II-1 Table of Uncertainty Parameters
Table II-1M Table of Uncertainty Parameters <\/td>\n<\/tr>\n
94<\/td>\nII-3 REFERENCES <\/td>\n<\/tr>\n
95<\/td>\nNONMANDATORY APPENDIX A REFERENCES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME PTC 25-2018 – 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>\n2018<\/td>\n98<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":197855,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-197853","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\/197853","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\/197855"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=197853"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=197853"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=197853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}