ASME B31.12 2019 w ERRATA
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ASME B31.12-2019: Hydrogen Piping and Pipelines, Includes Errata (2020)
| Published By | Publication Date | Number of Pages |
| ASME | 2019 | 280 |
ASME has been defining piping safety since 1922. ASME B31.12 Standard on Hydrogen Piping and Pipelines contains requirements for piping in gaseous and liquid hydrogen service and pipelines in gaseous hydrogen service. The general requirements section covers materials, brazing, welding, heat treating, forming, testing, inspection, examination, operating, and maintenance. The industrial piping section covers requirements for components, design, fabrication, assembly, erection, inspection, examination, and testing of piping. This Code is applicable to piping in gaseous and liquid hydrogen service and to pipelines in gaseous hydrogen service. B31.12 is applicable up to and including the joint connecting the piping to associated pressure vessels and equipment but not to the vessels and equipment themselves. It is also applicable to the location and type of support elements, but not to the structure to which the support elements are attached. B31.12 is presented in the following parts: (a) Part GR — General Requirements. This part contains definitions and requirements for materials, welding, brazing, heat treating, forming, testing, inspection, examination, operation, and maintenance.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | CONTENTS |
| 13 | FOREWORD |
| 14 | ASME B31 COMMITTEE ROSTER |
| 17 | CORRESPONDENCE WITH THE B31 COMMITTEE |
| 19 | INTRODUCTION |
| 21 | ASME B31.12-2019 SUMMARY OF CHANGES |
| 22 | PART GR GENERAL REQUIREMENTS Chapter GR-1 Scope and Definitions GR-1.1 SCOPE GR-1.2 RESPONSIBILITIES GR-1.2.1 Owner GR-1.2.2 Designer GR-1.2.3 Construction Organization GR-1.2.4 Owner’s Inspector GR-1.3 INTENT OF THE CODE |
| 23 | GR-1.4 PACKAGED EQUIPMENT REQUIREMENTS GR-1.5 TERMS AND DEFINITIONS |
| 32 | GR-1.6 ASME B31.12 APPENDICES GR-1.6.1 Mandatory Appendices GR-1.6.2 Nonmandatory Appendices |
| 33 | GR-1.6.3 Status of Appendices GR-1.7 NOMENCLATURE |
| 34 | Chapter GR-2 Materials GR-2.1 GENERAL REQUIREMENTS GR-2.1.1 Materials and Specifications |
| 35 | GR-2.1.2 Temperature Limitations |
| 36 | Tables Table GR-2.1.1-1 Material Specification Index for Piping and Pipe Components |
| 38 | Table GR-2.1.1-2 Material Specification Index for Pipelines |
| 39 | Table GR-2.1.2-1 Requirements for Low Temperature Toughness Tests for Metals |
| 40 | Figures Figure GR-2.1.2-1 Minimum Temperatures Without Impact Testing for Carbon Steel Materials |
| 41 | Table GR-2.1.2-2 Tabular Values for Minimum Temperatures Without Impact Testing for Carbon Steel Materials |
| 42 | GR-2.1.3 Impact Testing Methods and Acceptance Criteria |
| 43 | Figure GR-2.1.2-2 Reduction in Minimum Design Metal Temperature Without Impact Testing |
| 44 | Table GR-2.1.3-1 Impact Testing Requirements for Metals |
| 45 | GR-2.1.4 Fluid Service Requirements for Materials Table GR-2.1.3-2 Charpy Impact Test Temperature Reduction |
| 46 | Table GR-2.1.3-3 Minimum Required Charpy V-Notch Impact Values |
| 47 | GR-2.1.5 Deterioration of Materials in Service GR-2.2 JOINING AND AUXILIARY MATERIALS |
| 53 | Figure GR-3.4.3-1 Geometry of Weld Joint Detail Single Vee Groove Butt With Extended Land Figure GR-3.4.3-2 Geometry of Weld Joint Detail Square Butt Weld |
| 54 | Figure GR-3.4.3-3 Geometry of Weld Joint Detail Single Vee Groove Butt, Open Root Figure GR-3.4.3-4 Unequal Pipe Component Thicknesses, Thicker Components Bored for Alignment Figure GR-3.4.3-5 Unequal Pipe Component Thicknesses, Thicker Components Taper-Bored to Align |
| 55 | Figure GR-3.4.3-6 Geometry of Weld Joint Detail Single Vee Groove Butt, Continuous Flat Backing Ring Figure GR-3.4.3-7 Geometry of Weld Joint Detail Single Vee Groove Butt, Continuous Tapered Backing Ring Figure GR-3.4.3-8 Geometry of Weld Joint Detail Single Vee Groove Butt, Consumable Insert |
| 56 | Figure GR-3.4.3-9 Preparation and Alignment of Pipe Branch to Pipe Header Connection |
| 57 | Figure GR-3.4.4-1 Geometry of Weld Deposit Single Vee Groove Butt, Open Root Figure GR-3.4.4-2 Geometry of Weld Deposit Root Single Vee Groove Butt With Extended Land (Without Filler Metal) Figure GR-3.4.4-3 Geometry of Weld Deposit Square Butt End (Without Filler Metal) |
| 58 | Figure GR-3.4.5-1 Welding End Transition — Maximum Envelope |
| 59 | Table GR-3.4.6-1 Weld Reinforcement |
| 60 | Figure GR-3.4.6-1 Geometry of Weld Deposit Single Vee Groove Butt, Open Root With Concavity |
| 61 | Figure GR-3.4.7-2 Typical Details for Double-Welded Slip-On Flanges Figure GR-3.4.7-3 Minimum Welding Dimensions for Socket Welding Components to Pipe Including Fit-Up Detail |
| 62 | Figure GR-3.4.9-1 Typical Welded Branch Connections |
| 63 | Figure GR-3.4.9-2 Acceptable Details for Pipe Branch Attachment Welds |
| 64 | Figure GR-3.4.9-3 Acceptable Detail for Branch Connection of Pipe Fitting |
| 65 | Figure GR-3.4.9-4 Acceptable Details for Branch Attachment Suitable for 100% Radiography Table GR-3.5-1 Preheat Temperatures |
| 66 | Table GR-3.6.1-1 Requirements for Postweld Heat Treatment of Weldments |
| 67 | Figure GR-3.8-1 Joints for Tubular Components |
| 69 | Table GR-3.10-1 Hardness Testing Acceptance Criteria |
| 70 | Figure GR-3.10-1 Location of Vickers HardnessIndentations |
| 71 | Chapter GR-4 Inspection, Examination, and Testing GR-4.1 GENERAL GR-4.2 INSPECTION GR-4.2.1 Responsibility GR-4.2.2 Rights of the Owner’s Inspector GR-4.2.3 Qualifications of the Owner’s Inspector GR-4.3 EXAMINATION GR-4.3.1 Responsibility GR-4.3.2 Requirements |
| 72 | GR-4.3.3 Quality Control Examinations GR-4.3.4 Nondestructive Examination Methods GR-4.3.5 Special Methods GR-4.4 PERSONNEL QUALIFICATION AND CERTIFICATION |
| 73 | GR-4.5 EXTENT OF REQUIRED EXAMINATION AND TESTING GR-4.6 ACCEPTANCE CRITERIA GR-4.7 SUPPLEMENTARY EXAMINATION GR-4.8 EXAMINATIONS TO RESOLVE UNCERTAINTY GR-4.9 DEFECTIVE COMPONENTS AND WORKMANSHIP GR-4.10 PROGRESSIVE SAMPLING FOR EXAMINATION GR-4.11 TESTING GR-4.12 RECORDS GR-4.13 NDE DEFINITIONS |
| 75 | Chapter GR-5 Operation and Maintenance GR-5.1 GENERAL GR-5.2 OPERATION AND MAINTENANCE PLAN GR-5.2.1 Essential Features of the Operating and Maintenance Plan |
| 76 | GR-5.2.2 Essential Features of the Emergency Plan |
| 77 | GR-5.2.3 Failure Investigation GR-5.2.4 Prevention of Accidental Ignition GR-5.2.5 Blasting Effects GR-5.3 MAINTENANCE REQUIREMENTS GR-5.3.1 Corrosion Control |
| 79 | GR-5.3.2 Repair of Corroded Pipe GR-5.4 LEAKAGE SURVEYS GR-5.5 REPAIR PROCEDURES |
| 80 | GR-5.6 INJURIOUS DENTS AND MECHANICAL DAMAGE GR-5.6.1 Permanent Field Repairs of Injurious Dents GR-5.6.2 Permanent Field Repairs of Mechanical Damage |
| 81 | GR-5.7 PERMANENT REPAIR OF WELDS WITH DEFECTS GR-5.8 PERMANENT FIELD REPAIR OF LEAKS AND NONLEAKING CORRODED AREAS GR-5.9 PERMANENT FIELD REPAIR OF HYDROGEN STRESS CRACKING IN HARD SPOTS AND STRESS CORROSION CRACKING GR-5.10 TESTING AND EXAMINATION OF REPAIRS GR-5.10.1 Testing of Replacement Pipe Sections GR-5.10.2 Nondestructive Examination of Repairs |
| 82 | GR-5.11 VALVE MAINTENANCE GR-5.11.1 Piping and Transportation Pipeline Valves GR-5.11.2 Distribution System Valves GR-5.11.3 Service Line Valves GR-5.11.4 Valve Records GR-5.11.5 Prevention of Accidental Operation GR-5.12 TRANSMISSION PIPELINE MAINTENANCE GR-5.12.1 Continuing Surveillance of Pipelines GR-5.12.2 Pipeline Patrolling |
| 83 | GR-5.13 ABANDONING OF TRANSMISSION FACILITIES GR-5.14 DECOMMISSIONING OF TRANSMISSION FACILITIES GR-5.15 RECOMMISSIONING OF TRANSMISSION FACILITIES GR-5.16 REPOSITIONING A PIPELINE IN SERVICE |
| 84 | GR-5.17 TESTING FOR INTEGRITY ASSESSMENT OF IN-SERVICE PIPELINES GR-5.17.1 Pressure Test Levels GR-5.17.2 Pressure Hold Period GR-5.17.3 Time Interval Between Tests |
| 85 | GR-5.18 DISTRIBUTION PIPELINE MAINTENANCE GR-5.19 LEAKAGE SURVEYS GR-5.19.1 Types of Surveys GR-5.19.2 Frequency of Surveys GR-5.20 LEAKAGE INVESTIGATION AND ACTION GR-5.20.1 Leakage Classification and Repair GR-5.20.2 Investigation of Reports From Outside Sources |
| 86 | GR-5.20.3 Odor or Indications From Foreign Sources GR-5.20.4 Followup Examinations GR-5.21 REPAIR, TESTING, AND EXAMINATION OF MAINS OPERATING AT HOOP STRESS LEVELS AT OR ABOVE 30% OF THE SMYS GR-5.22 REQUIREMENTS FOR ABANDONING, DISCONNECTING, AND REINSTATING DISTRIBUTION FACILITIES GR-5.22.1 Abandoning of Distribution Facilities GR-5.22.2 Decommissioned Service GR-5.22.3 Test Requirements for Reinstating Decommissioned Service Line |
| 87 | GR-5.22.4 Maintenance Records GR-5.23 MAINTENANCE OF SPECIFIC FACILITIES GR-5.23.1 Compressor Station Maintenance GR-5.23.2 Procedures for Maintaining Pipe-Type and Bottle-Type Holders in Safe Operating Condition GR-5.23.3 Maintenance of Pressure-Limiting and Pressure-Regulating Stations |
| 88 | GR-5.23.4 Vault Maintenance |
| 89 | Chapter GR-6 Quality System Program for Hydrogen Piping and Pipeline Systems GR-6.1 QUALITY SYSTEM PROGRAM GR-6.2 QUALITY MANUAL GR-6.3 QUALITY SYSTEM FUNCTIONS |
| 92 | PART IP INDUSTRIAL PIPING Chapter IP-1 Scope and Responsibilities IP-1.1 SCOPE IP-1.1.1 Content and Coverage IP-1.1.2 Exclusions IP-1.2 RESPONSIBILITIES IP-1.2.1 Owner IP-1.2.2 Designer IP-1.2.3 Construction Organization IP-1.2.4 Owner’s Inspector IP-1.3 INTENT IP-1.4 DETERMINING CODE REQUIREMENTS |
| 93 | Chapter IP-2 Design Conditions and Criteria IP-2.1 DESIGN CONDITIONS IP-2.1.1 Qualifications of the Designer IP-2.1.2 Design Pressure IP-2.1.3 Required Pressure Containment or Relief IP-2.1.4 Design Temperature IP-2.1.5 Design Minimum Temperature |
| 94 | IP-2.1.6 Component Design Temperature IP-2.1.7 Ambient Effects IP-2.1.8 Dynamic Effects IP-2.2 DESIGN CRITERIA |
| 95 | IP-2.2.1 Pressure–Temperature Design Criteria IP-2.2.2 Listed Components Having Established Ratings IP-2.2.3 Listed Components Not Having Specific Ratings IP-2.2.4 Unlisted Components IP-2.2.5 Ratings at Junction of Different Services IP-2.2.6 Allowable Stresses and Other Stress Limits |
| 96 | IP-2.2.7 Bases for Design Stresses IP-2.2.8 Casting Quality Factor, EC |
| 97 | IP-2.2.9 Weld Joint Quality Factors, Ej IP-2.2.10 Limits of Calculated Stresses Due to Sustained Loads and Displacement Strains Table IP-2.2.8-1 Increased Casting Quality Factors, Ec |
| 98 | Table IP-2.2.8-2 Acceptance Levels for Castings |
| 99 | IP-2.2.11 Limits of Calculated Stresses Due to Occasional Loads IP-2.2.12 Allowances IP-2.2.13 Mechanical Strength Table IP-2.2.9-1 Longitudinal Weld Joint Quality Factor, Ej |
| 101 | Chapter IP-3 Pressure Design of Piping Components IP-3.1 GENERAL IP-3.2 STRAIGHT PIPE IP-3.2.1 Straight Pipe Under Internal Pressure Table IP-3.2-1 Values of Coefficient Y for t < D/6 |
| 102 | IP-3.2.2 Straight Pipe Under External Pressure IP-3.3 CURVED AND MITERED SEGMENTS OF PIPE IP-3.3.1 Pipe Bends IP-3.3.2 Elbows IP-3.3.3 Miter Bends Figure IP-3.3.1-1 Nomenclature for Pipe Bends Figure IP-3.3.3-1 Nomenclature for Miter Bends |
| 103 | IP-3.3.4 Curved and Mitered Segments of Pipe Under External Pressure IP-3.4 BRANCH CONNECTIONS IP-3.4.1 Strength of Branch Connections |
| 104 | IP-3.4.2 Reinforcement of Welded Branch Connections |
| 105 | IP-3.4.3 Reinforcement of Extruded Outlet Headers |
| 106 | Figure IP-3.4.2-1 Branch Connection Nomenclature |
| 107 | IP-3.4.4 Additional Design Considerations IP-3.4.5 Branch Connections Under External Pressure IP-3.5 CLOSURES |
| 108 | Figure IP-3.4.3-1 Extruded Outlet Header Nomenclature |
| 109 | IP-3.6 PRESSURE DESIGN OF FLANGES AND BLANKS IP-3.6.1 Flanges Table IP-3.5-1 ASME BPVC, Section VIII, Division 1 References for Closures |
| 110 | IP-3.6.2 Blind Flanges IP-3.6.3 Blanks IP-3.7 REDUCERS IP-3.7.1 Concentric Reducers IP-3.7.2 Eccentric Reducers IP-3.8 PRESSURE DESIGN OF OTHER COMPONENTS IP-3.8.1 Listed Components IP-3.8.2 Unlisted Components and Elements |
| 111 | IP-3.8.3 Metallic Components With Nonmetallic Pressure Parts IP-3.8.4 Expansion Joints Figure IP-3.6.3-1 Blanks |
| 112 | Chapter IP-4 Service Requirements for Piping Components IP-4.1 VALVES AND SPECIALTY COMPONENTS IP-4.1.1 Valves IP-4.1.2 Specific Requirements IP-4.2 BOLTING AND TAPPED HOLES FOR COMPONENTS |
| 113 | Chapter IP-5 Service Requirements for Piping Joints IP-5.1 SCOPE IP-5.2 WELDED JOINTS IP-5.2.1 Welding Requirements IP-5.2.2 Specific Requirements IP-5.3 FLANGED JOINTS IP-5.3.1 Listed and Unlisted Flange Joints IP-5.3.2 Selection, Design, and Installation of Flanged Joints IP-5.3.3 Flange Facings |
| 114 | IP-5.3.4 Flange Gaskets IP-5.3.5 Flange Bolting IP-5.3.6 Tapped Holes for Flange Bolting IP-5.3.7 Joints Using Flanges of Different Ratings IP-5.3.8 Metal-to-Nonmetal Flanged Joints IP-5.3.9 Slip-On Flanges IP-5.3.10 Socket Welding and Threaded Flanges IP-5.4 EXPANDED JOINTS |
| 115 | IP-5.5 THREADED JOINTS IP-5.5.1 Taper-Threaded Joints IP-5.5.2 Straight-Threaded Joints IP-5.5.3 Tubing Joints IP-5.6 CAULKED JOINTS |
| 116 | IP-5.7 BRAZED AND SOLDERED JOINTS IP-5.7.1 Soldered Joints IP-5.7.2 Brazed Joints IP-5.8 SPECIAL JOINTS |
| 117 | Chapter IP-6 Flexibility and Support IP-6.1 FLEXIBILITY OF PIPING IP-6.1.1 Requirements IP-6.1.2 Specific Requirements IP-6.1.3 Concepts |
| 118 | IP-6.1.4 Properties for Flexibility Analysis |
| 119 | IP-6.1.5 Flexibility Analysis |
| 120 | Figure IP-6.1.5-1 Moments in Bends |
| 121 | IP-6.1.6 Reactions Figure IP-6.1.5-2 Moments in Branch Connections |
| 122 | IP-6.1.7 Calculation of Movements IP-6.1.8 Means of Increasing Flexibility IP-6.2 PIPING SUPPORTS IP-6.2.1 Objectives IP-6.2.2 Analysis IP-6.2.3 Stresses for Pipe-Supporting Elements |
| 123 | IP-6.2.4 Materials IP-6.2.5 Threads IP-6.2.6 Fixtures IP-6.2.7 Structural Attachments |
| 124 | IP-6.2.8 Structural Connections |
| 125 | Chapter IP-7 Specific Piping Systems IP-7.1 INSTRUMENT PIPING IP-7.1.1 Scope IP-7.1.2 Requirements IP-7.2 PRESSURE-RELIEVING SYSTEMS IP-7.2.1 Stop Valves in Pressure-Relief Piping IP-7.2.2 Pressure Relief Discharge Piping IP-7.2.3 Pressure-Relieving Devices |
| 126 | Chapter IP-8 Dimensions and Ratings of Components IP-8.1 DIMENSIONAL REQUIREMENTS IP-8.1.1 Listed Piping Components IP-8.1.2 Unlisted Piping Components IP-8.1.3 Threads IP-8.2 RATINGS OF COMPONENTS IP-8.2.1 Listed Components IP-8.2.2 Unlisted Components IP-8.3 REFERENCE DOCUMENTS |
| 127 | Table IP-8.1.1-1 Component Standards |
| 129 | Chapter IP-9 Fabrication, Erection, and Assembly IP-9.1 GENERAL IP-9.2 RESPONSIBILITY IP-9.3 CONTENT AND COVERAGE IP-9.4 PACKAGED EQUIPMENT PIPING IP-9.5 EXCLUSIONS IP-9.6 FABRICATION AND ERECTION IP-9.6.1 Welding and Brazing IP-9.6.2 Welding and Brazing Materials IP-9.6.3 Procedure Qualification Hardness Tests IP-9.7 CONSTRUCTION OF WELDMENTS IP-9.7.1 Welding Repairs IP-9.7.2 Cleaning of Pipe Component Surfaces IP-9.7.3 Joint Preparation and Alignment IP-9.7.4 Welding of Circumferential Joints |
| 130 | IP-9.7.5 Weld End Transition IP-9.7.6 Weld Reinforcement IP-9.7.7 Fillet and Socket Welds IP-9.7.8 Seal Welding of Threaded Joints IP-9.7.9 Welded Branch Connections IP-9.7.10 Mitered Joints IP-9.7.11 Fabricated or Flared Laps IP-9.8 PREHEATING FOR WELDMENTS IP-9.9 HEAT TREATMENT IP-9.9.1 PWHT Requirements IP-9.9.2 Governing Thickness IP-9.9.3 Dissimilar Materials IP-9.9.4 Methods of Heating IP-9.9.5 PWHT Heating and Cooling Requirements IP-9.9.6 Temperature Verification IP-9.9.7 Delayed Heat Treatment IP-9.9.8 Partial Heat Treatment IP-9.10 SPECIFIC AND ALTERNATIVE HEAT TREATMENT REQUIREMENTS IP-9.11 CONSTRUCTION OF BRAZEMENTS IP-9.12 BENDING AND FORMING OF PIPE AND TUBE |
| 131 | IP-9.13 ASSEMBLY AND ERECTION IP-9.13.1 Alignment IP-9.13.2 Flanged Joints IP-9.14 THREADED JOINTS IP-9.15 TUBING JOINTS IP-9.16 EXPANDED JOINTS AND SPECIAL JOINTS IP-9.17 PIPE ATTACHMENTS AND SUPPORTS IP-9.18 CLEANING OF PIPING |
| 132 | Figure IP-9.14-1 Typical Threaded Joints Using Straight Threads |
| 133 | Chapter IP-10 Inspection, Examination, and Testing IP-10.1 SCOPE IP-10.2 RESPONSIBILITY IP-10.3 INSPECTIONS BY OWNER’S INSPECTOR IP-10.4 EXAMINATION REQUIREMENTS IP-10.4.1 Quality Control Examinations IP-10.4.2 Extent of Required NDE IP-10.4.3 Acceptance Criteria IP-10.4.4 Procedures |
| 134 | IP-10.4.5 Types of Examination IP-10.4.5.1 General IP-10.4.5.2 Visual (VT) IP-10.4.5.3 Radiographic Examination (RT) IP-10.4.5.4 Liquid Penetrant (PT) Table IP-10.4.2-1 Required Nondestructive Examinations |
| 135 | Table IP-10.4.3-1 Acceptance Criteria for Weldments and Methods for Evaluating Weld Imperfections |
| 136 | Table IP-10.4.3-2 Hardness Testing Acceptance Criteria for Weldments Table IP-10.4.3-3 Criterion Value Notes for Table IP-10.4.3-1 |
| 137 | IP-10.4.5.5 Magnetic Particle (MT) IP-10.4.5.6 Ultrasonic Examination (UT) IP-10.4.5.7 Hardness Control and Testing IP-10.5 TESTING IP-10.5.1 Required Leak Tests |
| 138 | IP-10.5.2 Requirements IP-10.5.3 Preparation for Leak Test |
| 139 | IP-10.5.4 Limits of Tested Piping IP-10.6 HYDROSTATIC LEAK TEST IP-10.6.1 Test Fluid IP-10.6.2 Test Pressure IP-10.6.3 Hydrostatic Test of Piping With Vessels as a System IP-10.7 PNEUMATIC LEAK TEST IP-10.7.1 Precautions IP-10.7.2 Pressure Relief Device IP-10.7.3 Test Fluid IP-10.7.4 Test Pressure |
| 140 | IP-10.7.5 Procedure IP-10.8 HYDROSTATIC-PNEUMATIC LEAK TEST IP-10.9 SENSITIVE LEAK TEST IP-10.10 ALTERNATIVE LEAK TEST IP-10.10.1 Examination of Welds IP-10.10.2 Flexibility Analysis IP-10.10.3 Test Method IP-10.11 MECHANICAL AND METALLURGICAL TESTING IP-10.12 RECORDS OF TESTING |
| 141 | PART PL PIPELINES Chapter PL-1 Scope and Exclusions PL-1.1 SCOPE PL-1.2 CONTENT AND COVERAGE PL-1.3 EXCLUSIONS |
| 142 | Chapter PL-2 Pipeline Systems Components and Fabrication Details PL-2.1 PURPOSE PL-2.2 PIPING SYSTEM COMPONENTS PL-2.2.1 Unlisted Components PL-2.2.2 Valves and Pressure-Reducing Devices PL-2.2.3 Flanges |
| 143 | PL-2.2.4 Fittings Other Than Valves and Flanges |
| 144 | PL-2.2.5 Pressure Design of Other Pressure-Containing Components PL-2.2.6 Closures PL-2.3 REINFORCEMENT OF FABRICATED BRANCH CONNECTIONS PL-2.3.1 Branch Connection Requirements |
| 145 | PL-2.3.2 Special Requirements |
| 146 | PL-2.4 MULTIPLE OPENINGS AND EXTRUDED OUTLETS PL-2.4.1 Reinforcement of Multiple Openings PL-2.4.2 Extruded Outlets PL-2.5 EXPANSION AND FLEXIBILITY PL-2.5.1 Application Table PL-2.3.2-1 Reinforcement of Fabricated Branch Connections, Special Requirements |
| 147 | PL-2.5.2 Amount of Expansion PL-2.5.3 Flexibility Requirements PL-2.5.4 Reactions PL-2.5.5 Modulus of Elasticity Table PL-2.5.2-1 Thermal Expansion of Carbon and Low Alloy Steel Table PL-2.5.5-1 Modulus of Elasticity for Carbon and Low Alloy Steel |
| 148 | PL-2.6 DESIGN FOR LONGITUDINAL STRESS PL-2.6.1 Restraint PL-2.6.2 Calculation of Longitudinal Stress Components PL-2.6.3 Summation of Longitudinal Stress in Restrained Pipe |
| 149 | PL-2.6.4 Combined Stress for Restrained Pipe PL-2.6.5 Summation of Longitudinal Stresses in Unrestrained Pipe PL-2.6.6 Flexibility Analysis for Unrestrained Piping PL-2.6.7 Flexibility Stresses and Stresses Due to Periodic or Cyclic Loading PL-2.6.8 Local Stresses |
| 150 | PL-2.7 SUPPORTS AND ANCHORAGE FOR EXPOSED PIPING PL-2.7.1 Piping and Equipment PL-2.7.2 Provision for Expansion PL-2.7.3 Materials, Design, and Installation PL-2.7.4 Forces on Pipe Joints PL-2.7.5 Attachment of Supports or Anchors PL-2.8 ANCHORAGE FOR BURIED PIPING PL-2.8.1 Pipe Bends or Offsets PL-2.8.2 Anchorage at Bends PL-2.8.3 Restraint Due to Soil Friction PL-2.8.4 Forces on Pipe Joints PL-2.8.5 Supports for Buried Piping |
| 151 | PL-2.8.6 Interconnection of Underground Lines |
| 152 | Chapter PL-3 Design, Installation, and Testing PL-3.1 PROVISIONS FOR DESIGN PL-3.1.1 Conditions PL-3.1.2 Quality PL-3.1.3 Damage PL-3.2 BUILDINGS INTENDED FOR HUMAN OCCUPANCY PL-3.2.1 Determination of Number of Buildings Intended for Human Occupancy |
| 153 | PL-3.2.2 Location Classes for Design and Construction PL-3.3 CONSIDERATIONS NECESSARY FOR CONCENTRATIONS OF PEOPLE IN LOCATION CLASS 1 OR CLASS 2 PL-3.3.1 Consequences of Failure PL-3.3.2 Dense Concentration PL-3.3.3 Low Concentration PL-3.4 INTENT PL-3.4.1 Definition PL-3.4.2 Future Development PL-3.5 RISK ASSESSMENT |
| 154 | PL-3.6 LOCATION CLASS AND CHANGES IN NUMBER OF BUILDINGS INTENDED FOR HUMAN OCCUPANCY PL-3.6.1 Continuing Surveillance Table PL-3.6.1-1 Location Class |
| 155 | PL-3.6.2 Confirmation or Revision of MAOP PL-3.6.3 Pressure-Relieving or Limiting Devices PL-3.6.4 Review of Valve Locations PL-3.6.5 Concentrations of People in Location Classes 1 and 2 |
| 156 | PL-3.7 STEEL PIPELINE PL-3.7.1 Steel Piping Systems Design Requirements Table PL-3.7.1-1 Basic Design Factor, F (Used With Option A) |
| 157 | Table PL-3.7.1-2 Basic Design Factor, F (Used With Option B) Table PL-3.7.1-3 Temperature Derating Factor, T, for Steel Pipe |
| 158 | Table PL-3.7.1-4 Nominal Chemical Composition Within a Specification/Grade Table PL-3.7.1-5 Material Constants for Fatigue Crack Growth Rate, da/dN |
| 159 | PL-3.7.2 Protection of Pipelines and Mains From Hazards PL-3.7.3 Cover, Clearance, and Casing Requirements for Buried Steel Pipelines and Mains |
| 160 | Table PL-3.7.1-6 Design Factors for Steel Pipe Construction (Used With Option A) Table PL-3.7.1-7 Design Factors for Steel Pipe Construction (Used With Option B) |
| 161 | PL-3.7.4 Installation of Steel Pipelines and Mains — Construction Specifications PL-3.7.5 Bends, Elbows, and Miters in Steel Pipelines and Mains |
| 162 | PL-3.7.6 Pipe Surface Requirements Applicable to Pipelines and Mains to Operate at a Hoop Stress of 20% or More of the SMYS Table PL-3.7.5-1 Maximum Degree of Bending |
| 163 | PL-3.7.7 Miscellaneous Operations Involved in the Installation of Steel Pipelines and Mains PL-3.8 HOT TAPS PL-3.9 PRECAUTIONS TO PREVENT COMBUSTION OF HYDROGEN-AIR MIXTURES DURING CONSTRUCTION OPERATIONS PL-3.9.1 Leakage Prevention PL-3.9.2 Purging of Pipelines PL-3.9.3 Accidental Ignition |
| 164 | PL-3.10 TESTING AFTER CONSTRUCTION PL-3.10.1 Pipeline Testing PL-3.10.2 Test Required to Prove Strength of Pipelines and Mains PL-3.10.3 Test Level PL-3.10.4 Crossings PL-3.10.5 Location Classes 3 and 4 PL-3.10.6 Records PL-3.10.7 Leak Tests for Pipelines or Mains PL-3.11 COMMISSIONING OF FACILITIES PL-3.11.1 Procedures PL-3.11.2 Cleaning and Drying Procedures |
| 165 | PL-3.11.3 Functional Testing of Equipment and Systems PL-3.11.4 Start-Up Procedures and Introduction of Transported Hydrogen Gas PL-3.11.5 Documentation and Records PL-3.12 PIPE-TYPE AND BOTTLE-TYPE HOLDERS PL-3.12.1 Pipe-Type Holders PL-3.12.2 Bottle-Type Holders PL-3.12.3 Installation of Pipe-Type and Bottle-Type Holders PL-3.12.4 Special Provisions Applicable to Bottle-Type Holders Only PL-3.12.5 General Provisions Applicable to Both Pipe-Type and Bottle-Type Holders PL-3.13 CONTROL AND LIMITING OF HYDROGEN GAS PRESSURE PL-3.13.1 Basic Requirement for Protection Against Accidental Overpressuring |
| 166 | PL-3.13.2 Control and Limiting of Gas Pressure in Holders, Pipelines, and All Facilities That Might at Times Be Bottle Tight PL-3.13.3 Control and Limiting of Hydrogen Gas Pressure in High-Pressure Steel Distribution Systems PL-3.13.4 MAOP for High-Pressure Distribution Systems PL-3.13.5 Control and Limiting of the Pressure of Hydrogen Gas Delivered From High-Pressure Distribution Systems |
| 167 | PL-3.13.6 Requirements for Design of Pressure-Relief and Pressure-Limiting Installations |
| 168 | PL-3.14 UPRATING |
| 169 | PL-3.15 VALVES PL-3.15.1 Required Spacing of Valves PL-3.15.2 Spacing of Valves on Distribution Mains PL-3.15.3 Location of Valves |
| 170 | PL-3.16 VAULT PROVISIONS FOR DESIGN, CONSTRUCTION, AND INSTALLATION OF PIPELINE COMPONENTS PL-3.17 LOCATION FOR CUSTOMERS’ METER AND REGULATOR INSTALLATIONS |
| 171 | PL-3.18 HYDROGEN GAS SERVICE LINES PL-3.18.1 General Provisions Applicable to Steel Lines PL-3.18.2 Steel Service Lines |
| 172 | PL-3.19 INSPECTION AND EXAMINATION PL-3.19.1 Inspection Provision (Quality Examinations) |
| 173 | PL-3.19.2 Examination Requirements PL-3.19.3 Verifications and Examinations PL-3.19.4 Radiographic Examination PL-3.19.5 Liquid Penetrant Examination |
| 174 | PL-3.19.6 Magnetic Particle Examination PL-3.19.7 Ultrasonic Examination PL-3.19.8 Hardness Control and Testing PL-3.20 REPAIR OR REMOVAL OF DEFECTIVE WELDS IN PIPING INTENDED TO OPERATE AT HOOP STRESS LEVELS OF 20% OR MORE OF THE SMYS PL-3.21 STEEL PIPELINE SERVICE CONVERSIONS |
| 176 | MANDATORY APPENDICES MANDATORY APPENDIX I DESIGN OF ABOVEGROUND HYDROGEN GAS PIPELINE FACILITIES |
| 181 | MANDATORY APPENDIX II REFERENCE STANDARDS |
| 185 | MANDATORY APPENDIX III SAFEGUARDING |
| 187 | MANDATORY APPENDIX IV NOMENCLATURE |
| 192 | MANDATORY APPENDIX V (In preparation) |
| 193 | MANDATORY APPENDIX VI PREPARATION OF TECHNICAL INQUIRIES |
| 194 | MANDATORY APPENDIX VII GAS LEAKAGE AND CONTROL CRITERIA |
| 197 | Table VII-5.3-1 Leak Classification and Action Criteria: Grade 1 Table VII-5.3-2 Leak Classification and Action Criteria: Grade 2 |
| 198 | Table VII-5.3-3 Leak Classification and Action Criteria: Grade 3 |
| 199 | MANDATORY APPENDIX VIII (In preparation) |
| 200 | MANDATORY APPENDIX IX ALLOWABLE STRESSES AND QUALITY FACTORS FOR METALLIC PIPING, PIPELINE, AND BOLTING MATERIALS |
| 201 | Table IX-1A Basic Allowable Stresses in Tension for Metal Piping Materials |
| 232 | Table IX-1B SMYS for Steel Pipe Commonly Used in Pipeline Systems |
| 233 | Table IX-2 Basic Casting Quality Factors, Ec |
| 234 | Table IX-3A Basic Quality Factors for Longitudinal Weld Joints in Pipes, Tubes, and Fittings, Ej |
| 237 | Table IX-3B Longitudinal Joints Factors for Pipeline Materials |
| 239 | Table IX-4 Design Stress Values for Bolting Materials |
| 248 | Table IX-5A Carbon Steel Pipeline Materials Performance Factor, Hf Table IX-5B Carbon Steel Piping Materials Performance Factor, Mf Table IX-5C Low and Intermediate Alloy Steels Performance Factor, Mf |
| 249 | NONMANDATORY APPENDICES NONMANDATORY APPENDIX A PRECAUTIONARY CONSIDERATIONS |
| 250 | Table A-2-1 Materials Compatible With Hydrogen Service |
| 255 | Figure A-3.5-1 Weld Quality Illustrations for Autogenous Welded Pipe or Tube |
| 259 | NONMANDATORY APPENDIX B ALTERNATIVE RULES FOR EVALUATING STRESS RANGE |
| 261 | NONMANDATORY APPENDIX C RECOMMENDED PRACTICES FOR PROOF TESTING OF PIPELINES IN PLACE |
| 264 | Figure D-1-1 Method for Estimating Strain in Dents NONMANDATORY APPENDIX D ESTIMATING STRAIN IN DENTS |
| 265 | NONMANDATORY APPENDIX E SAMPLE CALCULATIONS FOR BRANCH REINFORCEMENT IN PIPING |
| 267 | Figure E-2-1 Illustrations for Examples in Nonmandatory Appendix E |
| 270 | NONMANDATORY APPENDIX F WELDED BRANCH CONNECTIONS AND EXTRUDED HEADERS IN PIPELINE SYSTEMS |
| 272 | Figure F-1-1 Figure F-1-2 Figure F-1-3 |
| 273 | Figure F-1-4 Figure F-2.1-1 |
| 274 | Figure F-2.1.5-1 |
| 275 | Figure F-2.2-1 |
| 276 | NONMANDATORY APPENDIX G GUIDELINE FOR HIGHER FRACTURE TOUGHNESS STEEL IN GASEOUS HYDROGEN SERVICE FOR PIPELINES AND PIPING SYSTEMS |
