{"id":450503,"date":"2024-10-20T09:11:24","date_gmt":"2024-10-20T09:11:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-b31-12-2023\/"},"modified":"2024-10-26T17:08:50","modified_gmt":"2024-10-26T17:08:50","slug":"asme-b31-12-2023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-b31-12-2023\/","title":{"rendered":"ASME B31.12 2023"},"content":{"rendered":"

This Code is applicable to piping and pipelines handling gaseous hydrogen and gaseous hydrogen mixtures and to piping in liquid hydrogen service. This Code 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 applicable to the location and type of support elements but not to the structure to which the support elements are attached.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
11<\/td>\nFOREWORD <\/td>\n<\/tr>\n
12<\/td>\nASME B31 COMMITTEE ROSTER <\/td>\n<\/tr>\n
14<\/td>\nCORRESPONDENCE WITH THE B31 COMMITTEE <\/td>\n<\/tr>\n
16<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
18<\/td>\nASME B31.12-2023 SUMMARY OF CHANGES <\/td>\n<\/tr>\n
22<\/td>\nPART 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\u2019s Inspector
GR-1.3 INTENT OF THE CODE <\/td>\n<\/tr>\n
23<\/td>\nGR-1.4 PACKAGED EQUIPMENT REQUIREMENTS
GR-1.5 TERMS AND DEFINITIONS <\/td>\n<\/tr>\n
32<\/td>\nGR-1.6 ASME B31.12 APPENDICES
GR-1.6.1 Mandatory Appendices
GR-1.6.2 Nonmandatory Appendices <\/td>\n<\/tr>\n
33<\/td>\nGR-1.6.3 Status of Appendices
GR-1.7 NOMENCLATURE <\/td>\n<\/tr>\n
34<\/td>\nChapter GR-2 Materials
GR-2.1 GENERAL REQUIREMENTS
GR-2.1.1 Materials and Specifications <\/td>\n<\/tr>\n
35<\/td>\nTables
Table GR-2.1.1-1 Material Specification Index for Piping and Pipe Components <\/td>\n<\/tr>\n
37<\/td>\nGR-2.1.2 Temperature Limitations
Table GR-2.1.1-2 Material Specification Index for Pipelines <\/td>\n<\/tr>\n
38<\/td>\nTable GR-2.1.2-1 Requirements for Low Temperature Toughness Tests for Metals <\/td>\n<\/tr>\n
39<\/td>\nFigures
Figure GR-2.1.2-1 Minimum Temperatures Without Impact Testing for Carbon Steel Materials <\/td>\n<\/tr>\n
40<\/td>\nTable GR-2.1.2-2 Tabular Values for Minimum Temperatures Without Impact Testing for Carbon Steel Materials <\/td>\n<\/tr>\n
41<\/td>\nGR-2.1.3 Impact Testing Methods and Acceptance Criteria <\/td>\n<\/tr>\n
42<\/td>\nFigure GR-2.1.2-2 Reduction in Minimum Design Metal Temperature Without Impact Testing <\/td>\n<\/tr>\n
43<\/td>\nTable GR-2.1.3-1 Impact Testing Requirements for Metals <\/td>\n<\/tr>\n
44<\/td>\nTable GR-2.1.3-2 Charpy Impact Test Temperature Reduction <\/td>\n<\/tr>\n
45<\/td>\nGR-2.1.4 Fluid Service Requirements for Materials
Table GR-2.1.3-3 Minimum Required Charpy V-Notch Impact Values <\/td>\n<\/tr>\n
47<\/td>\nGR-2.1.5 Deterioration of Materials in Service
GR-2.2 JOINING AND AUXILIARY MATERIALS <\/td>\n<\/tr>\n
48<\/td>\nChapter GR-3 Welding, Brazing, Heat Treating, Forming, and Testing
GR-3.1 GENERAL
GR-3.2 WELDING AND BRAZING
GR-3.2.1 Material Compatibility
GR-3.2.2 Responsibility
GR-3.2.3 Methods and Processes
GR-3.2.4 Qualification Testing and Certification Requirements
GR-3.2.5 Method and Process Requirements <\/td>\n<\/tr>\n
50<\/td>\nGR-3.2.6 Procedure Qualification by Others
GR-3.2.7 Performance Qualification by Others <\/td>\n<\/tr>\n
51<\/td>\nGR-3.2.8 Welder Operator Qualifications
GR-3.2.9 Welding and Brazing Records
GR-3.2.10 Requalification Requirements
GR-3.3 WELDING AND BRAZING MATERIALS
GR-3.3.1 Electrodes and Filler Metal
GR-3.3.2 Weld Backing Material
GR-3.3.3 Consumable Inserts
GR-3.3.4 Brazing Materials
GR-3.4 CONSTRUCTION OF WELDMENTS <\/td>\n<\/tr>\n
52<\/td>\nGR-3.4.1 Welding Repairs
GR-3.4.2 Cleaning of Component Surfaces
GR-3.4.3 Joint Preparation and Alignment <\/td>\n<\/tr>\n
53<\/td>\nFigure 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
Figure GR-3.4.3-3 Geometry of Weld Joint Detail Single Vee Groove Butt, Open Root <\/td>\n<\/tr>\n
54<\/td>\nFigure 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
Figure GR-3.4.3-6 Geometry of Weld Joint Detail Single Vee Groove Butt, Continuous Flat Backing Ring <\/td>\n<\/tr>\n
55<\/td>\nFigure 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
Figure GR-3.4.3-9 Preparation and Alignment of Pipe Branch to Pipe Header Connection <\/td>\n<\/tr>\n
56<\/td>\nGR-3.4.4 Welding of Circumferential Joints
GR-3.4.5 Weld End Transition <\/td>\n<\/tr>\n
57<\/td>\nFigure 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) <\/td>\n<\/tr>\n
58<\/td>\nFigure GR-3.4.5-1 Welding End Transition \u2014 Maximum Envelope <\/td>\n<\/tr>\n
59<\/td>\nGR-3.4.6 Weld Reinforcement
Figure GR-3.4.6-1 Geometry of Weld Deposit Single Vee Groove Butt, Open Root With Concavity
Table GR-3.4.6-1 Weld Reinforcement <\/td>\n<\/tr>\n
60<\/td>\nGR-3.4.7 Fillet and Socket Welds
GR-3.4.8 Seal Welding of Threaded Joints (See Figure GR-3.4.7-1 for Fillet Weld)
GR-3.4.9 Welded Branch Connections <\/td>\n<\/tr>\n
61<\/td>\nFigure GR-3.4.7-1 Fillet Weld Size
Figure GR-3.4.7-2 Typical Details for Double-Welded Slip-On Flanges <\/td>\n<\/tr>\n
62<\/td>\nFigure GR-3.4.7-3 Minimum Welding Dimensions for Socket Welding Components to Pipe Including Fit-Up Detail
Figure GR-3.4.9-1 Typical Welded Branch Connections <\/td>\n<\/tr>\n
63<\/td>\nFigure GR-3.4.9-2 Acceptable Details for Pipe Branch Attachment Welds <\/td>\n<\/tr>\n
64<\/td>\nGR-3.4.10 Mitered Joints
GR-3.4.11 Fabricated or Flared Laps
GR-3.4.12 Attachment Welds
Figure GR-3.4.9-3 Acceptable Detail for Branch Connection of Pipe Fitting
Figure GR-3.4.9-4 Acceptable Details for Branch Attachment Suitable for 100% Radiography <\/td>\n<\/tr>\n
65<\/td>\nGR-3.4.13 Requirement for Fabricating and Attaching Pipe Supports
GR-3.5 PREHEATING FOR WELDMENTS
Table GR-3.5-1 Preheat Temperatures <\/td>\n<\/tr>\n
66<\/td>\nGR-3.6 HEAT TREATMENT
GR-3.6.1 PWHT Requirements
GR-3.6.2 Governing Thickness
Table GR-3.6.1-1 Requirements for Postweld Heat Treatment of Weldments <\/td>\n<\/tr>\n
67<\/td>\nGR-3.6.3 Dissimilar Materials
GR-3.6.4 Methods of Heating
GR-3.6.5 PWHT Heating and Cooling Requirements <\/td>\n<\/tr>\n
68<\/td>\nGR-3.6.6 Temperature Verification
GR-3.6.7 Delayed Heat Treatment
GR-3.6.8 Partial Heat Treatment
GR-3.7 SPECIFIC AND ALTERNATIVE HEAT TREAT REQUIREMENTS
GR-3.7.1 Exceptions to Basic Requirements
GR-3.7.2 Alternative Heat Treatment
GR-3.8 CONSTRUCTION OF BRAZEMENTS
GR-3.8.1 Brazed Joint Type
GR-3.8.2 Couplings With Internal Stops <\/td>\n<\/tr>\n
69<\/td>\nGR-3.8.3 Repairs
GR-3.8.4 Precleaning and Surface Prep
GR-3.8.5 Joint Preparation, Alignment, and Brazing
Figure GR-3.8-1 Joints for Tubular Components <\/td>\n<\/tr>\n
70<\/td>\nGR-3.8.6 Brazing Fluxes
GR-3.8.7 Brazing Process
GR-3.8.8 Post-Braze Cleaning
GR-3.9 FORMING OF PIPE COMPONENTS <\/td>\n<\/tr>\n
71<\/td>\nGR-3.9.1 Bending Requirements
GR-3.9.2 Post-Heat Treatment
GR-3.10 HARDNESS TESTING
Table GR-3.10-1 Hardness Testing Acceptance Criteria <\/td>\n<\/tr>\n
72<\/td>\nFigure GR-3.10-1 Location of Vickers Hardness Indentations <\/td>\n<\/tr>\n
73<\/td>\nChapter 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\u2019s Inspector
GR-4.2.3 Qualifications of the Owner\u2019s Inspector
GR-4.3 EXAMINATION
GR-4.3.1 Responsibility
GR-4.3.2 Requirements <\/td>\n<\/tr>\n
74<\/td>\nGR-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 <\/td>\n<\/tr>\n
75<\/td>\nGR-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 <\/td>\n<\/tr>\n
77<\/td>\nChapter 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 <\/td>\n<\/tr>\n
78<\/td>\nGR-5.2.2 Essential Features of the Emergency Plan <\/td>\n<\/tr>\n
79<\/td>\nGR-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 <\/td>\n<\/tr>\n
81<\/td>\nGR-5.3.2 Repair of Corroded Pipe
GR-5.4 LEAKAGE SURVEYS
GR-5.5 REPAIR PROCEDURES <\/td>\n<\/tr>\n
82<\/td>\nGR-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 <\/td>\n<\/tr>\n
83<\/td>\nGR-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 <\/td>\n<\/tr>\n
84<\/td>\nGR-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 <\/td>\n<\/tr>\n
85<\/td>\nGR-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 <\/td>\n<\/tr>\n
86<\/td>\nGR-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 <\/td>\n<\/tr>\n
87<\/td>\nGR-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 <\/td>\n<\/tr>\n
88<\/td>\nGR-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 <\/td>\n<\/tr>\n
89<\/td>\nGR-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 <\/td>\n<\/tr>\n
90<\/td>\nGR-5.23.4 Vault Maintenance <\/td>\n<\/tr>\n
91<\/td>\nChapter GR-6 Quality System Program for Hydrogen Piping and Pipeline Systems
GR-6.1 QUALITY SYSTEM PROGRAM FOR INDUSTRIAL PIPING
GR-6.2 QUALITY SYSTEM PROGRAM FOR PIPELINES <\/td>\n<\/tr>\n
92<\/td>\nPART 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\u2019s Inspector
IP-1.3 INTENT
IP-1.4 DETERMINING CODE REQUIREMENTS <\/td>\n<\/tr>\n
93<\/td>\nChapter 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 <\/td>\n<\/tr>\n
94<\/td>\nIP-2.1.6 Component Design Temperature
IP-2.1.7 Ambient Effects
IP-2.1.8 Dynamic Effects
IP-2.2 DESIGN CRITERIA <\/td>\n<\/tr>\n
95<\/td>\nIP-2.2.1 Pressure\u2013Temperature 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 <\/td>\n<\/tr>\n
96<\/td>\nIP-2.2.7 Bases for Design Stresses
IP-2.2.8 Casting Quality Factor, EC <\/td>\n<\/tr>\n
97<\/td>\nIP-2.2.9 Weld Joint Quality Factors, Ej
IP-2.2.10 Limits of Calculated Stresses Due to Sustained Loads and Displacement Strains
IP-2.2.11 Limits of Calculated Stresses Due to Occasional Loads
Table IP-2.2.8-1 Increased Casting Quality Factors, Ec <\/td>\n<\/tr>\n
98<\/td>\nIP-2.2.12 Allowances
IP-2.2.13 Mechanical Strength
Table IP-2.2.8-2 Acceptance Levels for Castings <\/td>\n<\/tr>\n
99<\/td>\nTable IP-2.2.9-1 Longitudinal Weld Joint Quality Factor, Ej <\/td>\n<\/tr>\n
100<\/td>\nChapter 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 <\/td>\n<\/tr>\n
101<\/td>\nIP-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 <\/td>\n<\/tr>\n
102<\/td>\nIP-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 <\/td>\n<\/tr>\n
103<\/td>\nIP-3.4.2 Reinforcement of Welded Branch Connections <\/td>\n<\/tr>\n
104<\/td>\nFigure IP-3.4.2-1 Branch Connection Nomenclature <\/td>\n<\/tr>\n
105<\/td>\nIP-3.4.3 Reinforcement of Extruded Outlet Headers <\/td>\n<\/tr>\n
106<\/td>\nFigure IP-3.4.3-1 Extruded Outlet Header Nomenclature <\/td>\n<\/tr>\n
107<\/td>\nIP-3.4.4 Additional Design Considerations <\/td>\n<\/tr>\n
108<\/td>\nIP-3.4.5 Branch Connections Under External Pressure
IP-3.5 CLOSURES
Table IP-3.5-1 ASME BPVC, Section VIII, Division 1 References for Closures <\/td>\n<\/tr>\n
109<\/td>\nIP-3.6 PRESSURE DESIGN OF FLANGES AND BLANKS
IP-3.6.1 Flanges
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 <\/td>\n<\/tr>\n
110<\/td>\nIP-3.8.3 Metallic Components With Nonmetallic Pressure Parts
IP-3.8.4 Expansion Joints
Figure IP-3.6.3-1 Blanks <\/td>\n<\/tr>\n
112<\/td>\nChapter 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 <\/td>\n<\/tr>\n
113<\/td>\nChapter 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 <\/td>\n<\/tr>\n
114<\/td>\nIP-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 <\/td>\n<\/tr>\n
115<\/td>\nIP-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 <\/td>\n<\/tr>\n
116<\/td>\nIP-5.7 BRAZED AND SOLDERED JOINTS
IP-5.7.1 Soldered Joints
IP-5.7.2 Brazed Joints
IP-5.8 SPECIAL JOINTS <\/td>\n<\/tr>\n
117<\/td>\nChapter IP-6 Flexibility and Support
IP-6.1 ANALYSIS OF DISPLACEMENT LOADS
IP-6.2 ANALYSIS OF SUSTAINED LOADS
IP-6.3 PIPING SUPPORT <\/td>\n<\/tr>\n
118<\/td>\nChapter 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 <\/td>\n<\/tr>\n
119<\/td>\nChapter 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 <\/td>\n<\/tr>\n
120<\/td>\nTable IP-8.1.1-1 Component Standards <\/td>\n<\/tr>\n
122<\/td>\nChapter 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 <\/td>\n<\/tr>\n
123<\/td>\nIP-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 <\/td>\n<\/tr>\n
124<\/td>\nIP-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 <\/td>\n<\/tr>\n
125<\/td>\nFigure IP-9.14-1 Typical Threaded Joints Using Straight Threads <\/td>\n<\/tr>\n
126<\/td>\nChapter IP-10 Inspection, Examination, and Testing
IP-10.1 SCOPE
IP-10.2 RESPONSIBILITY
IP-10.3 INSPECTIONS BY OWNER\u2019S INSPECTOR
IP-10.4 EXAMINATION REQUIREMENTS
IP-10.4.1 Quality Control Examinations
IP-10.4.2 Extent of Required NDE <\/td>\n<\/tr>\n
127<\/td>\nIP-10.4.3 Acceptance Criteria
IP-10.4.4 Procedures
IP-10.4.5 Types of Examination
Table IP-10.4.2.2-1 Required Nondestructive Examinations Other Than VT <\/td>\n<\/tr>\n
128<\/td>\nTable IP-10.4.3-1 Acceptance Criteria for Weldments and Methods for Evaluating Weld Imperfections <\/td>\n<\/tr>\n
129<\/td>\nTable 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 <\/td>\n<\/tr>\n
130<\/td>\nIP-10.5 TESTING
IP-10.5.1 Required Leak Tests <\/td>\n<\/tr>\n
131<\/td>\nIP-10.5.2 Requirements
IP-10.5.3 Preparation for Leak Test
IP-10.5.4 Limits of Tested Piping <\/td>\n<\/tr>\n
132<\/td>\nIP-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
IP-10.7.5 Procedure <\/td>\n<\/tr>\n
133<\/td>\nIP-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 <\/td>\n<\/tr>\n
134<\/td>\nPART PL PIPELINES
Chapter PL-1 Scope and Exclusions
PL-1.1 SCOPE
PL-1.2 CONTENT AND COVERAGE
PL-1.3 EXCLUSIONS <\/td>\n<\/tr>\n
135<\/td>\nChapter 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 <\/td>\n<\/tr>\n
136<\/td>\nPL-2.2.4 Fittings Other Than Valves and Flanges <\/td>\n<\/tr>\n
137<\/td>\nPL-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 <\/td>\n<\/tr>\n
138<\/td>\nPL-2.3.2 Special Requirements <\/td>\n<\/tr>\n
139<\/td>\nPL-2.4 MULTIPLE OPENINGS AND EXTRUDED OUTLETS
PL-2.4.1 Reinforcement of Multiple Openings
PL-2.4.2 Extruded Outlets
Table PL-2.3.2-1 Reinforcement of Fabricated Branch Connections, Special Requirements <\/td>\n<\/tr>\n
140<\/td>\nPL-2.5 EXPANSION AND FLEXIBILITY
PL-2.5.1 Application
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
PL-2.6 DESIGN FOR LONGITUDINAL STRESS
PL-2.6.1 Restraint
Table PL-2.5.2-1 Thermal Expansion of Carbon and Low Alloy Steel <\/td>\n<\/tr>\n
141<\/td>\nPL-2.6.2 Calculation of Longitudinal Stress Components
PL-2.6.3 Summation of Longitudinal Stress in Restrained Pipe
Table PL-2.5.5-1 Modulus of Elasticity for Carbon and Low Alloy Steel <\/td>\n<\/tr>\n
142<\/td>\nPL-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 <\/td>\n<\/tr>\n
143<\/td>\nPL-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 <\/td>\n<\/tr>\n
144<\/td>\nPL-2.8.6 Interconnection of Underground Lines <\/td>\n<\/tr>\n
145<\/td>\nChapter 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 <\/td>\n<\/tr>\n
146<\/td>\nPL-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 <\/td>\n<\/tr>\n
147<\/td>\nPL-3.5 RISK ASSESSMENT
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 <\/td>\n<\/tr>\n
148<\/td>\nPL-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 <\/td>\n<\/tr>\n
149<\/td>\nPL-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) <\/td>\n<\/tr>\n
150<\/td>\nTable 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 <\/td>\n<\/tr>\n
151<\/td>\nTable PL-3.7.1-4 Nominal Chemical Composition Within a Specification\/Grade <\/td>\n<\/tr>\n
152<\/td>\nPL-3.7.2 Protection of Pipelines and Mains From Hazards
Table PL-3.7.1-5 Material Constants for Fatigue Crack Growth Rate, da\/dN <\/td>\n<\/tr>\n
153<\/td>\nTable 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) <\/td>\n<\/tr>\n
154<\/td>\nPL-3.7.3 Cover, Clearance, and Casing Requirements for Buried Steel Pipelines and Mains
PL-3.7.4 Installation of Steel Pipelines and Mains \u2014 Construction Specifications <\/td>\n<\/tr>\n
155<\/td>\nPL-3.7.5 Bends, Elbows, and Miters in Steel Pipelines and Mains
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 <\/td>\n<\/tr>\n
156<\/td>\nPL-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 <\/td>\n<\/tr>\n
157<\/td>\nPL-3.9.2 Purging of Pipelines
PL-3.9.3 Accidental Ignition
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 <\/td>\n<\/tr>\n
158<\/td>\nPL-3.11 COMMISSIONING OF FACILITIES
PL-3.11.1 Procedures
PL-3.11.2 Cleaning and Drying Procedures
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 <\/td>\n<\/tr>\n
159<\/td>\nPL-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
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 <\/td>\n<\/tr>\n
160<\/td>\nPL-3.13.5 Control and Limiting of the Pressure of Hydrogen Gas Delivered From High-Pressure Distribution Systems
PL-3.13.6 Requirements for Design of Pressure-Relief and Pressure-Limiting Installations <\/td>\n<\/tr>\n
161<\/td>\nPL-3.14 UPRATING <\/td>\n<\/tr>\n
162<\/td>\nPL-3.15 VALVES
PL-3.15.1 Required Spacing of Valves
PL-3.15.2 Spacing of Valves on Distribution Mains <\/td>\n<\/tr>\n
163<\/td>\nPL-3.15.3 Location of Valves
PL-3.16 VAULT PROVISIONS FOR DESIGN, CONSTRUCTION, AND INSTALLATION OF PIPELINE COMPONENTS <\/td>\n<\/tr>\n
164<\/td>\nPL-3.17 LOCATION FOR CUSTOMERS\u2019 METER AND REGULATOR INSTALLATIONS
PL-3.18 HYDROGEN GAS SERVICE LINES
PL-3.18.1 General Provisions Applicable to Steel Lines <\/td>\n<\/tr>\n
165<\/td>\nPL-3.18.2 Steel Service Lines
PL-3.19 INSTALLATION INSPECTION
PL-3.19.1 Weld Examination Requirements <\/td>\n<\/tr>\n
166<\/td>\nPL-3.19.2 Visual Examination and Acceptance Criteria
PL-3.19.3 Radiographic Examination
PL-3.19.4 Liquid Penetrant Examination
PL-3.19.5 Magnetic Particle Examination
PL-3.19.6 Ultrasonic Examination <\/td>\n<\/tr>\n
167<\/td>\nPL-3.19.7 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 <\/td>\n<\/tr>\n
169<\/td>\nMANDATORY APPENDICES
MANDATORY APPENDIX I DESIGN OF ABOVEGROUND HYDROGEN GAS PIPELINE FACILITIES
I-1 COMPRESSOR STATIONS <\/td>\n<\/tr>\n
171<\/td>\nI-2 DESIGN OF INSTRUMENT, CONTROL, AND SAMPLE PIPING
I-3 MISCELLANEOUS PIPING ASSEMBLIES <\/td>\n<\/tr>\n
174<\/td>\nMANDATORY APPENDIX II REFERENCE STANDARDS <\/td>\n<\/tr>\n
177<\/td>\nMANDATORY APPENDIX III SAFEGUARDING
III-1 SCOPE
III-2 GENERAL CONSIDERATIONS
III-3 SAFEGUARDING BY PLANT LAYOUT AND OPERATION
III-4 ENGINEERED SAFEGUARDS <\/td>\n<\/tr>\n
179<\/td>\nMANDATORY APPENDIX IV NOMENCLATURE <\/td>\n<\/tr>\n
184<\/td>\nMANDATORY APPENDIX VII GAS LEAKAGE AND CONTROL CRITERIA
VII-1 SCOPE
VII-2 DEFINITIONS
VII-3 LEAKAGE SURVEY AND TEST METHODS <\/td>\n<\/tr>\n
186<\/td>\nVII-4 INSTRUMENTS FOR THE DETECTION OF GAS
VII-5 LEAKAGE CLASSIFICATION AND ACTION CRITERIA <\/td>\n<\/tr>\n
187<\/td>\nTable VII-5.3-1 Leak Classification and Action Criteria: Grade 1
Table VII-5.3-2 Leak Classification and Action Criteria: Grade 2 <\/td>\n<\/tr>\n
188<\/td>\nTable VII-5.3-3 Leak Classification and Action Criteria: Grade 3
VII-6 PINPOINTING <\/td>\n<\/tr>\n
189<\/td>\nMANDATORY APPENDIX IX ALLOWABLE STRESSES AND QUALITY FACTORS FOR METALLIC PIPING, PIPELINE, AND BOLTING MATERIALS
IX-1 INTRODUCTION
IX-2 TABLE IX-1
IX-3 TABLE IX-3
IX-4 TABLE IX-4
IX-5 TABLE IX-5 <\/td>\n<\/tr>\n
191<\/td>\nTable IX-1A Basic Allowable Stresses in Tension for Metal Piping Materials <\/td>\n<\/tr>\n
222<\/td>\nTable IX-1B SMYS for Steel Pipe Commonly Used in Pipeline Systems <\/td>\n<\/tr>\n
223<\/td>\nTable IX-2 Basic Casting Quality Factors, Ec <\/td>\n<\/tr>\n
224<\/td>\nTable IX-3A Basic Quality Factors for Longitudinal Weld Joints in Pipes, Tubes, and Fittings, Ej <\/td>\n<\/tr>\n
227<\/td>\nTable IX-3B Longitudinal Joints Factors for Pipeline Materials <\/td>\n<\/tr>\n
229<\/td>\nTable IX-4 Design Stress Values for Bolting Materials <\/td>\n<\/tr>\n
238<\/td>\nTable 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 <\/td>\n<\/tr>\n
239<\/td>\nNONMANDATORY APPENDICES
NONMANDATORY APPENDIX A PRECAUTIONARY CONSIDERATIONS
A-1 GENERAL
A-2 MATERIALS <\/td>\n<\/tr>\n
240<\/td>\nTable A-2-1 Materials Compatible With Hydrogen Service <\/td>\n<\/tr>\n
242<\/td>\nA-3 WELDING, BRAZING, HEAT TREATING, FORMING, AND TESTING (SEE CHAPTER GR-3) <\/td>\n<\/tr>\n
244<\/td>\nFigure A-3.5-1 Weld Quality Illustrations for Autogenous Welded Pipe or Tube <\/td>\n<\/tr>\n
245<\/td>\nA-4 GENERAL INSPECTION, EXAMINATION, AND TESTING \u2014 SPECIAL CONSIDERATIONS (SEE PARA. GR-4.1)
A-5 INDUSTRIAL PIPING DESIGN CONDITIONS (SEE CHAPTER IP-2) <\/td>\n<\/tr>\n
246<\/td>\nA-6 PRESSURE DESIGN OF PIPING COMPONENTS \u2014 EXPANSION JOINTS (SEE PARA. IP-3.8.4)
A-7 SERVICE REQUIREMENTS FOR VALVES AND SPECIALTY PIPING COMPONENTS (SEE PARA. IP-4.1)
A-8 SPECIFIC INDUSTRIAL PIPING SYSTEMS \u2014 STOP VALVES IN PRESSURE RELIEF PIPING (SEE PARA. IP-7.2.1)
A-9 INDUSTRIAL PIPING FABRICATION, ERECTION, AND ASSEMBLY <\/td>\n<\/tr>\n
247<\/td>\nA-10 INDUSTRIAL PIPING INSPECTION, EXAMINATION, AND TESTING <\/td>\n<\/tr>\n
248<\/td>\nA-11 PREHEATING FOR PIPELINE (SEE PARA. PL-3.19) <\/td>\n<\/tr>\n
249<\/td>\nNONMANDATORY APPENDIX B ALTERNATIVE RULES FOR EVALUATING STRESS RANGE
B-1 GENERAL
B-2 LIMITS OF CALCULATED STRESSES DUE TO SUSTAINED LOADS AND DISPLACEMENT STRAINS
B-3 FLEXIBILITY STRESSES
B-4 REQUIRED WELD QUALITY ASSURANCE
B-5 REACTIONS <\/td>\n<\/tr>\n
250<\/td>\nB-6 MAXIMUM REACTIONS FOR SIMPLE SYSTEMS
B-7 MAXIMUM REACTIONS FOR COMPLEX SYSTEMS <\/td>\n<\/tr>\n
251<\/td>\nNONMANDATORY APPENDIX C RECOMMENDED PRACTICES FOR PROOF TESTING OF PIPELINES IN PLACE
C-1 INTRODUCTION
C-2 HYDROSTATIC TESTING <\/td>\n<\/tr>\n
252<\/td>\nC-3 PNEUMATIC TESTING <\/td>\n<\/tr>\n
254<\/td>\nFigure D-1-1 Method for Estimating Strain in Dents
NONMANDATORY APPENDIX D ESTIMATING STRAIN IN DENTS
D-1 STRAIN
D-2 ESTIMATING STRAIN <\/td>\n<\/tr>\n
255<\/td>\nNONMANDATORY APPENDIX E SAMPLE CALCULATIONS FOR BRANCH REINFORCEMENT IN PIPING
E-1 INTRODUCTION
E-2 EXAMPLE 1
E-3 EXAMPLE 2 <\/td>\n<\/tr>\n
256<\/td>\nFigure E-2-1 Illustrations for Examples in Nonmandatory Appendix E <\/td>\n<\/tr>\n
257<\/td>\nE-4 EXAMPLE 3 <\/td>\n<\/tr>\n
258<\/td>\nE-5 EXAMPLE 4
E-6 EXAMPLE 5 (NOT ILLUSTRATED) <\/td>\n<\/tr>\n
260<\/td>\nNONMANDATORY APPENDIX F WELDED BRANCH CONNECTIONS AND EXTRUDED HEADERS IN PIPELINE SYSTEMS
F-1 DEFINITIONS AND LIMITATIONS
F-2 EXAMPLES ILLUSTRATING THE APPLICATION OF THE RULES FOR REINFORCEMENT OF WELDED BRANCH CONNECTIONS <\/td>\n<\/tr>\n
261<\/td>\nFigure F-1-1
Figure F-1-2 <\/td>\n<\/tr>\n
262<\/td>\nFigure F-1-3
Figure F-1-4 <\/td>\n<\/tr>\n
263<\/td>\nFigure F-2.1-1 <\/td>\n<\/tr>\n
264<\/td>\nFigure F-2.1.5-1 <\/td>\n<\/tr>\n
265<\/td>\nFigure F-2.2-1 <\/td>\n<\/tr>\n
266<\/td>\nNONMANDATORY APPENDIX G GUIDELINE FOR HIGHER FRACTURE TOUGHNESS STEEL IN GASEOUS HYDROGEN SERVICE FOR PIPELINES AND PIPING SYSTEMS
G-1 MICROSTRUCTURE <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME B31.12-2023 Hydrogen Piping and Pipelines<\/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":450506,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-450503","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\/450503","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\/450506"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=450503"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=450503"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=450503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}