ASME B31P 2017
$98.04
ASME B31P Heat Treatments for Fabrication Processes
| Published By | Publication Date | Number of Pages |
| ASME | 2017 | 41 |
This Standard provides requirements for heat treatment of piping assemblies that meet the requirements of ASME B31 Code Sections. These requirements apply to: preheating; postweld heat treatment (PWHT); postforming heat treatment (PFHT) required by the ASME B31 Code Sections for other fabrication processes, including forming processes such as bending; and heat treatments required by contract specifications.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 6 | FOREWORD |
| 7 | ASME B31 COMMITTEE ROSTER |
| 9 | CORRESPONDENCE WITH THE B31 COMMITTEE |
| 12 | 1 INTRODUCTION 2 GLOSSARY 3 TEMPERATURE MEASUREMENT 3.1 Measurement Method |
| 13 | 3.2 Attachment of Thermocouples 4 TEMPERATURE CONTROL 4.1 Control of Heat Treatment Temperature |
| 14 | 4.2 Heating and Cooling Rates 5 WELDING PREHEAT 5.1 Temperature 5.2 Different P-Number Materials 5.3 Interruption of Welding Preheat Tables Table 5.1-1 Preheat Temperature |
| 15 | 6 POSTWELD HEAT TREATMENT (PWHT) 6.1 Minimum PWHT Requirements 6.2 Mandatory PWHT Requirements 6.3 Exemptions to Mandatory PWHT Requirements |
| 16 | Table 6.1.1-1 Postweld Heat Treatment |
| 17 | 6.4 Definition of Thicknesses Governing PWHT 7 POSTFORMING AND MATERIAL HEAT TREATMENTS 7.1 PFHT Table 6.1.1-2 Alternate Postweld Heat Treatment Requirements for Carbon and Low-Alloy Steels, P-Nos. 1 and 3 |
| 18 | Table 6.1.1-3 Exemptions to Mandatory Postweld Heat Treatment |
| 20 | 7.2 Material Heat Treatment 8 ALTERNATIVES AND EXEMPTIONS TO PREHEAT AND PWHT REQUIREMENTS Table 6.2-1 Approximate Lower Transformation Temperatures |
| 21 | NONMANDATORY APPENDIX A RECOMMENDATIONS FOR THE PROPER USE OF THERMOCOUPLES A-1 THERMOCOUPLE TYPES AND USAGE A-2 PERMISSIBLE THERMOCOUPLE WIRE SIZE A-3 LOCATION A-4 ATTACHMENT A-5 REMOVAL OF THERMOCOUPLES |
| 22 | NONMANDATORY APPENDIX B RECOMMENDATIONS FOR CONTROL OF NARROW TEMPERATURE RANGE HEAT TREATMENTS: LOCAL HEAT-TREATMENT METHODS B-1 SCOPE B-2 INTRODUCTION B-3 GLOSSARY AND NOMENCLATURE FOR LOCAL HEATING B-3.1 Glossary |
| 23 | Figures Figure B-3.1-1 Definition of Terms for Local Circumferential Band Heating of Pipe Weld B-3.2 Nomenclature B-4 LOCAL CIRCUMFERENTIAL BAND HEATING B-4.1 Soak Band B-4.2 Heated Band B-4.3 Gradient Control Band B-4.4 Axial Temperature Gradient |
| 24 | Figure B-3.1-2 Definition of Terms for Local Circumferential Band Heating of Branch Connection to Pipe Attachment Weld |
| 25 | Table B-5.1-1 Requirements for Control Zones B-5 DESIGN OF THE HEATING PROCESS B-5.1 Postweld Heat Treatment B-5.2 Examples of Thermocouple Locations B-5.3 Special Considerations |
| 26 | Figure B-5.2-1 Location of Thermocouples (Monitoring and Control) for Pipe Sizes Less Than NPS 6 (150 DN) and One Control Zone |
| 27 | Figure B-5.2-2 Location of Thermocouples (Monitoring and Control) for Pipe Sizes NPS 6 (DN 150) Up to and Including NPS 12 (DN 300) and Two Control Zones |
| 28 | Figure B-5.2-3 Location of Thermocouples (Monitoring and Control) for Pipe Sizes NPS 14 (DN 350) Up to and Including NPS 30 (DN 750) and Four Control Zones |
| 29 | Figure B-5.2-4 Location of Monitoring Thermocouples for Branch Nozzle or Attachment Welds |
| 31 | Figure B-5.3-1 Example of One Approach When the Heated Band From a Weld Requiring PWHT Intersects a Weld Not Requiring PWHT |
| 32 | B-5.4 Control of the PWHT Thermal Cycle B-5.5 Insulation B-5.6 Quality Requirements B-5.7 Other Design Considerations |
| 33 | Forms Form 1 Standard Procedure for Local Heating |
| 36 | Form 2 Standard Documentation Checklist for Local Heating |
| 37 | Figure C-1 Typical Branch Attachment Details That May Be Used to Calculate Control Thickness NONMANDATORY APPENDIX C BRANCH CONNECTION EXAMPLES |
| 38 | Figure C-2 Typical Integrally Reinforced Outlet Fitting Branch Connection Details That May Be Used to Calculate Control Thickness |
| 39 | NONMANDATORY APPENDIX D TEMPER BEAD METHOD ALTERNATIVE TO PWHT D-1 TEMPER BEAD WELDING |
| 40 | NONMANDATORY APPENDIX E FRACTURE MECHANICS ALTERNATIVE TO PWHT E-1 FRACTURE MECHANICS EXEMPTION E-1.1 PWHT E-1.2 ECA |
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