ASME B31P 2023

$98.04

ASME B31P-2023 Standard Heat Treatments for Piping

Published By	Publication Date	Number of Pages
ASME	2023	44

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Description

This Standard provides requirements for heat treatment of piping and pipelines that meet the requirements of the 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 fabricated assemblies, including forming operations such as bending; heat treatments required by contract documents

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
6	FOREWORD
7	ASME B31 COMMITTEE ROSTER
9	CORRESPONDENCE WITH THE B31 COMMITTEE
11	ASME B31P-2023 SUMMARY OF CHANGES
12	1 INTRODUCTION 1.1 Scope 1.2 General 1.3 Exclusions 1.4 Units of Measure 2 GLOSSARY
13	3 TEMPERATURE MEASUREMENT 3.1 Measurement Method 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
15	6 POSTWELD HEAT TREATMENT (PWHT) 6.1 Minimum PWHT Requirements Tables Table 5.1-1 Preheat Temperature
16	Table 6.1.1-1 Postweld Heat Treatment Table 6.1.1-2 Alternate Postweld Heat Treatment Requirements for Carbon and Low-Alloy Steels, P-Nos. 1 and 3
17	Table 6.1.1-3 Exemptions to Mandatory Postweld Heat Treatment
19	6.2 Mandatory PWHT Requirements 6.3 Exemptions to Mandatory PWHT Requirements 6.4 Definition of Thicknesses Governing PWHT Table 6.2-1 Approximate Lower Transformation Temperatures
20	7 POSTFORMING AND MATERIAL HEAT TREATMENTS 7.1 PFHT 7.2 Material Heat Treatment 8 ALTERNATIVES AND EXEMPTIONS TO PREHEAT AND PWHT REQUIREMENTS
21	NONMANDATORY APPENDICES 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	Figures Figure B-3.1-1 Definition of Terms for Local Circumferential Band Heating of Pipe Weld 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
23	Figure B-3.1-2 Definition of Terms for Local Circumferential Band Heating of Branch Connection to Pipe Attachment Weld
24	B-4 LOCAL CIRCUMFERENTIAL BAND HEATING
25	Table B-5.1-1 Requirements for Control Zones B-5 DESIGN OF THE HEATING PROCESS
26	Figure B-5.2-1 Location of Thermocouples (Monitoring and Control) for Pipe Sizes Less Than NPS 6 (DN 150) 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
33	Forms Form B-5.6-1 Standard Procedure for Local Heating
36	Form B-5.6-2 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