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ASME BPVC - III - 1 - NB -2021 BPVC Section III, Rules for Construction of Nuclear Facility Components, Division 1, Subsection NB, Class 1 Components, 2021
- TABLE OF CONTENTS
- LIST OF SECTIONS
- INTERPRETATIONS
- CODE CASES
- FOREWORD
- STATEMENT OF POLICY ON THE USE OF THE ASME SINGLE CERTIFICATION MARK AND CODE AUTHORIZATION IN ADVERTISING
- STATEMENT OF POLICY ON THE USE OF ASME MARKING TO IDENTIFY MANUFACTURED ITEMS
- SUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER AND PRESSURE VESSEL STANDARDS COMMITTEES
- Personnel ASME Boiler and Pressure Vessel Standards Committees, Subgroups, and Working Groups
- ORGANIZATION OF SECTION III [Go to Page]
- 1 GENERAL
- 2 SUBSECTIONS
- 3 ARTICLES
- 4 SUBARTICLES
- 5 SUBSUBARTICLES
- 6 PARAGRAPHS
- 7 SUBPARAGRAPHS
- 8 SUBSUBPARAGRAPHS
- 9 REFERENCES
- SUMMARY OF CHANGES
- LIST OF CHANGES IN RECORD NUMBER ORDER
- CROSS-REFERENCING AND STYLISTIC CHANGES IN THE BOILER AND PRESSURE VESSEL CODE
- Article NB-1000 Introduction [Go to Page]
- NB-1100 Scope [Go to Page]
- NB-1110 Aspects of Construction Covered by These Rules
- NB-1120 Temperature Limits
- NB-1130 Boundaries of Jurisdiction Applicable to This Subsection
- NB-1140 Electrical and Mechanical Penetration Assemblies
- Article NB-2000 Material [Go to Page]
- NB-2100 General Requirements for Material [Go to Page]
- NB-2110 Scope of Principal Terms Employed
- NB-2120 Pressure‑Retaining Material
- NB-2130 Certification of Material
- NB-2140 Welding Material
- NB-2150 Material Identification
- NB-2160 Deterioration of Material in Service
- NB-2170 Heat Treatment to Enhance Impact Properties
- NB-2180 Procedures for Heat Treatment of Material
- NB-2190 Non-Pressure‑Retaining Material
- NB-2200 Material Test Coupons and Specimens for Ferritic Steel Material [Go to Page]
- NB-2210 Heat Treatment Requirements
- NB-2220 Procedure for Obtaining Test Coupons and Specimens for Quenched and Tempered Material
- NB-2300 Fracture Toughness Requirements for Material [Go to Page]
- NB-2310 Material to Be Impact Tested
- NB-2320 Impact Test Procedures
- NB-2330 Test Requirements and Acceptance Standards2
- NB-2340 Number of Impact Tests Required
- NB-2350 Retests
- NB-2360 Calibration of Instruments and Equipment
- NB-2400 Welding Material [Go to Page]
- NB-2410 General Requirements
- NB-2420 Required Tests
- NB-2430 Weld Metal Tests
- NB-2440 Storage and Handling of Welding Material
- NB-2500 Examination and Repair of Pressure‑Retaining Material [Go to Page]
- NB-2510 Examination of Pressure‑Retaining Material
- NB-2520 Examination After Quenching and Tempering
- NB-2530 Examination and Repair of Plate
- NB-2540 Examination and Repair of Forgings and Bars
- NB-2550 Examination and Repair of Seamless and Welded (Without Filler Metal) Tubular Products and Fittings
- NB-2560 Examination and Repair of Tubular Products and Fittings Welded With Filler Metal
- NB-2570 Examination and Repair of Statically and Centrifugally Cast Products
- NB-2580 Examination of Bolts, Studs, and Nuts
- NB-2600 Material Organizations’ Quality System Programs [Go to Page]
- NB-2610 Documentation and Maintenance of Quality System Programs
- NB-2700 Dimensional Standards
- Article NB-3000 Design [Go to Page]
- NB-3100 General Design [Go to Page]
- NB-3110 Loading Criteria
- NB-3120 Special Considerations
- NB-3130 General Design Rules
- NB-3200 Design by Analysis [Go to Page]
- NB-3210 Requirements for Acceptability
- NB-3300 Vessel Design [Go to Page]
- NB-3310 General Requirements
- NB-3320 Design Considerations
- NB-3330 Openings and Reinforcement
- NB-3340 Analysis of Vessels
- NB-3350 Design of Welded Construction
- NB-3360 Special Vessel Requirements
- NB-3400 Pump Design [Go to Page]
- NB-3410 General Requirements for Centrifugal Pumps
- NB-3420 Definitions
- NB-3430 Design Requirements for Centrifugal Pumps
- NB-3440 Design of Specific Pump Types
- NB-3500 Valve Design [Go to Page]
- NB-3510 Acceptability
- NB-3520 Design Considerations
- NB-3530 General Rules
- NB-3540 Design of Pressure-Retaining Parts
- NB-3550 Cyclic Loading Requirements
- NB-3560 Design Reports
- NB-3590 Pressure Relief Valve Design
- NB-3600 Piping Design [Go to Page]
- NB-3610 General Requirements
- NB-3620 Design Considerations
- NB-3630 Piping Design and Analysis Criteria
- NB-3640 Pressure Design
- NB-3650 Analysis of Piping Products
- NB-3660 Design of Welds
- NB-3670 Special Piping Requirements
- NB-3680 Stress Indices and Flexibility Factors
- NB-3690 Dimensional Requirements for Piping Products
- Article NB-4000 Fabrication and Installation [Go to Page]
- NB-4100 General Requirements [Go to Page]
- NB-4110 Introduction
- NB-4120 Certification of Materials and Fabrication by Certificate Holder
- NB-4130 Repair of Material
- NB-4200 Forming, Fitting, and Aligning [Go to Page]
- NB-4210 Cutting, Forming, and Bending
- NB-4220 Forming Tolerances
- NB-4230 Fitting and Aligning
- NB-4240 Requirements for Weld Joints in Components
- NB-4250 Welding End Transitions — Maximum Envelope
- NB-4300 Welding Qualifications [Go to Page]
- NB-4310 General Requirements
- NB-4320 Welding Qualifications, Records, and Identifying Stamps
- NB-4330 General Requirements for Welding Procedure Qualification Tests
- NB-4350 Special Qualification Requirements for Tube‑to‑Tubesheet Welds
- NB-4360 Qualification Requirements for Welding Specially Designed Welded Seals
- NB-4400 Rules Governing Making, Examining, and Repairing Welds [Go to Page]
- NB-4410 Precautions to Be Taken Before Welding
- NB-4420 Rules for Making Welded Joints
- NB-4430 Welding of Attachments
- NB-4440 Welding of Appurtenances
- NB-4450 Repair of Weld Metal Defects
- NB-4500 Brazing [Go to Page]
- NB-4510 Rules for Brazing
- NB-4520 Brazing Qualification Requirements
- NB-4530 Fitting and Aligning of Parts to Be Brazed
- NB-4540 Examination of Brazed Joints
- NB-4600 Heat Treatment [Go to Page]
- NB-4610 Welding Preheat Requirements
- NB-4620 Postweld Heat Treatment
- NB-4630 Heat Treatment of Welds Other Than the Final Postweld Heat Treatment
- NB-4650 Heat Treatment After Bending or Forming for Pipes, Pumps, and Valves
- NB-4660 Heat Treatment of Electroslag Welds
- NB-4700 Mechanical Joints [Go to Page]
- NB-4710 Bolting and Threading
- NB-4720 Bolting Flanged Joints
- NB-4730 Electrical and Mechanical Penetration Assemblies
- Article NB-5000 Examination [Go to Page]
- NB-5100 General Requirements for Examination [Go to Page]
- NB-5110 Methods, Nondestructive Examination Procedures, and Cleaning
- NB-5120 Time of Examination of Welds and Weld Metal Cladding
- NB-5130 Examination of Weld Edge Preparation Surfaces
- NB-5140 Examination of Welds and Adjacent Base Material
- NB-5200 Required Examination of Welds for Fabrication and Preservice Baseline [Go to Page]
- NB-5210 Category A Vessel Welded Joints and Longitudinal Welded Joints in Other Components
- NB-5220 Category B Vessel Welded Joints and Circumferential Welded Joints in Piping, Pumps, and Valves
- NB-5230 Category C Vessel Welded Joints and Similar Welded Joints in Other Components
- NB-5240 Category D Vessel Welded Joints and Branch and Piping Connections in Other Components
- NB-5250 Weld Metal Buildups to Form Nozzles, Branch and Piping Connections and for Closure Opening Reinforcement
- NB-5260 Fillet, Partial Penetration, Socket, and Attachment Welded Joints
- NB-5270 Special Welded Joints
- NB-5280 Preservice Examination
- NB-5300 Acceptance Standards [Go to Page]
- NB-5320 Radiographic Acceptance Standards
- NB-5330 Ultrasonic Acceptance Standards
- NB-5340 Magnetic Particle Acceptance Standards
- NB-5350 Liquid Penetrant Acceptance Standards
- NB-5370 Visual Acceptance Standards for Brazed Joints
- NB-5380 Bubble Formation Testing
- NB-5400 Final Examination of Vessels [Go to Page]
- NB-5410 Examination After Hydrostatic Test
- NB-5500 Qualifications and Certification of Nondestructive Examination Personnel [Go to Page]
- NB-5510 General Requirements
- NB-5520 Personnel Qualification, Certification, and Verification
- NB-5530 Records
- Article NB-6000 Testing [Go to Page]
- NB-6100 General Requirements [Go to Page]
- NB-6110 Pressure Testing of Components, Appurtenances, and Systems
- NB-6120 Preparation for Testing
- NB-6200 Hydrostatic Tests [Go to Page]
- NB-6210 Hydrostatic Test Procedure
- NB-6220 Hydrostatic Test Pressure Requirements
- NB-6300 Pneumatic Tests [Go to Page]
- NB-6310 Pneumatic Testing Procedures
- NB-6320 Pneumatic Test Pressure Requirements
- NB-6400 Pressure Test Gages [Go to Page]
- NB-6410
- NB-6600 Special Test Pressure Situations [Go to Page]
- NB-6610 Components Designed for External Pressure
- NB-6620 Pressure Testing of Combination Units
- Article NB-7000 Overpressure Protection [Go to Page]
- NB-7100 General Requirements [Go to Page]
- NB-7110 Scope
- NB-7120 Integrated Overpressure Protection
- NB-7130 Verification of the Operation of Reclosing Pressure Relief Devices
- NB-7140 Installation
- NB-7150 Acceptable Pressure Relief Devices
- NB-7160 Unacceptable Pressure Relief Devices
- NB-7170 Permitted Use of Pressure Relief Devices
- NB-7200 Overpressure Protection Report [Go to Page]
- NB-7210 Responsibility for Report
- NB-7220 Content of Report
- NB-7230 Certification of Report
- NB-7240 Review of Report After Installation
- NB-7250 Filing of Report
- NB-7300 Relieving Capacity [Go to Page]
- NB-7310 Expected System Pressure Transient Conditions
- NB-7320 Unexpected System Excess Pressure Transient Conditions
- NB-7400 Set Pressures of Pressure Relief Devices [Go to Page]
- NB-7410 Set Pressure Limitations for Expected System Pressure Transient Conditions
- NB-7420 Set Pressure Limitation for Unexpected System Excess Pressure Transient Conditions
- NB-7500 Operating and Design Requirements for Pressure Relief Valves [Go to Page]
- NB-7510 Safety, Safety Relief, and Relief Valves
- NB-7520 Pilot-Operated Pressure Relief Valves
- NB-7530 Power-Actuated Pressure Relief Valves
- NB-7540 Safety Valves and Pilot-Operated Pressure Relief Valves With Auxiliary Actuating Devices
- NB-7550 Alternative Test Media
- NB-7600 Nonreclosing Pressure Relief Devices [Go to Page]
- NB-7610 Rupture Disk Devices
- NB-7620 Installation
- NB-7700 Certification [Go to Page]
- NB-7710 Responsibility for Certification of Pressure Relief Valves
- NB-7720 Responsibility for Certification of Nonreclosing Pressure Relief Devices
- NB-7730 Capacity Conversions
- NB-7800 Marking, Stamping With Certification Mark, and Data Reports [Go to Page]
- NB-7810 Pressure Relief Valves
- NB-7820 Rupture Disk Devices
- NB-7830 Certificate of Authorization to Use Certification Mark
- Article NB-8000 Nameplates, Stamping With Certification Mark, and Reports [Go to Page]
- NB-8100 General Requirements
- Figures [Go to Page]
- Figure NB-1132.2-1 Attachments in the Component Support Load Path That Do Not Perform a Pressure-Retaining Function
- Figure NB-1132.2-2 Attachments That Do Not Perform a Pressure-Retaining Function and Are Not in the Component Support Load Path (Nonstructural Attachments)
- Figure NB-1132.2-3 Attachments That Perform a Pressure-Retaining Function
- Figure NB-1132.2-4 Attachments Within the Reactor Pressure Vessel (Core Support Structures) That Do Not Perform a Pressure-Retaining Function
- Figure NB-2433.1-1 Weld Metal Delta Ferrite Content
- Figure NB-2552-1 Axial Propagation of Sound in Tube Wall
- Figure NB-2575.2-1 Typical Pressure-Retaining Parts of Pumps and Valves
- Figure NB-3332.2-1 Chart for Determining Value of F
- Figure NB-3338.2(a)-1 Direction of Stress Components
- Figure NB-3338.2(a)-2 Nozzle Dimensions
- Figure NB-3339.1(b)-1 Examples of Acceptable Transition Details
- Figure NB-3339.4-1 Limits of Reinforcing Zone
- Figure NB-3351-1 Welded Joint Locations Typical of Categories A, B, C, and D
- Figure NB-3352-1 Typical Butt Joints
- Figure NB-3361-1 Category A and B Joints Between Sections of Unequal Thickness
- Figure NB-3423-1 Typical Single Volute Casing
- Figure NB-3423-2 Typical Double Volute Casing
- Figure NB-3433.4-1 Minimum Tangential Inlet and Outlet Wall Thickness
- Figure NB-3441.1-1 Type A Pump
- Figure NB-3441.1-2 Type A Pump
- Figure NB-3441.2-1 Type B Pump
- Figure NB-3441.3-1 Type C Pump
- Figure NB-3441.3-2 Type C Pump
- Figure NB-3441.4(a)-1 Type D Pump
- Figure NB-3441.5-1 Type E Pump
- Figure NB-3441.6(a)-1 Type F Pump
- Figure NB-3544.1(a)-1 Fillets and Corners
- Figure NB-3544.1(c)-1 Ring Grooves
- Figure NB-3544.3-1 Lugs and Protuberances
- Figure NB-3544.7-1 Flat Wall Limitation
- Figure NB-3545.1(a)-1 Pressure Area Method
- Figure NB-3545.2(a)-1 Critical Sections of Valve Bodies
- Figure NB-3545.2(c)-1 Model for Determining Secondary Stress in Valve Crotch Region
- Figure NB-3545.2(c)-3 Thermal Stress Index Versus Thickness Continuity Run or Branch
- Figure NB-3545.2(c)-4 Secondary Stress Index Versus Thickness Discontinuity Run or Branch
- Figure NB-3545.2(c)-5 C4 Versus Te1/te
- Figure NB-3545.2(c)-6 Stress Index for Thermal Fatigue
- Figure NB-3591.2-1 Typical Pressure Relief Devices
- Figure NB-3591.2-2 Typical Pressure Relief and Safety Relief Devices
- Figure NB-3594.3-1 Valve Nozzle
- Figure NB-3622-1 Examples of Reversing and Nonreversing Dynamic Loads
- Figure NB-3643.3(a)-1 Branch Connection Nomenclature
- Figure NB-3643.3(a)-2 Typical Reinforcement of Openings
- Figure NB-3643.3(a)-3 Typical Reinforced Extruded Outlet
- Figure NB-3644(b)-1 Miter Joint Geometry
- Figure NB-3647.2-1 Types of Permanent Blanks
- Figure NB-3653.2(b)-1 Decomposition of Temperature Distribution Range
- Figure NB-3683.1(c)-1
- Figure NB-3683.1(d)-1
- Figure NB-3683.6-1
- Figure NB-3684-1 Direction of Stress Components
- Figure NB-3685.2-1 Elbow Nomenclature
- Figure NB-3686.1-1
- Figure NB-3686.2-1
- Figure NB-3686.5-1 Branch Connections in Straight Pipe
- Figure NB-4221.1-1 Maximum Difference in Cross-Sectional Diameters
- Figure NB-4221.2(a)-1 Maximum Permissible Deviation e From a True Circular Form
- Figure NB-4221.2(a)-2 Maximum Arc Length for Determining Plus or Minus Deviation
- Figure NB-4233(a)-1 Butt Weld Alignment and Mismatch Tolerances for Unequal I.D. and O.D. When Components Are Welded From One Side and Fairing Is Not Performed
- Figure NB-4243-1 Acceptable Full Penetration Weld Details for Category C Joints (NB-3352.3)
- Figure NB-4244(a)-1 Nozzles Joined by Full Penetration Butt Welds
- Figure NB-4244(b)-1 Nozzles Joined by Full Penetration Corner Welds
- Figure NB-4244(c)-1 Deposited Weld Metal Used as Reinforcement of Openings for Nozzles
- Figure NB-4244(d)-1 Partial Penetration Nozzles
- Figure NB-4244(d)-2 Partial Penetration Nozzle for Coaxial Cylinders
- Figure NB-4244(e)-1 Oblique Connections
- Figure NB-4246(a)-1 Typical Piping Branch Connections Joined by Full Penetration Welds
- Figure NB-4246(b)-1 Typical Piping Branch Connections Joined by a Fillet Weld or a Partial Penetration Weld
- Figure NB-4250-1 Welding End Transitions — Maximum Envelope
- Figure NB-4250-2 Component to Pipe Weld
- Figure NB-4250-3 Pipe to Pipe Weld
- Figure NB-4424.2-1 Preservice Examination Marking for Piping
- Figure NB-4427-1 Fillet and Socket Weld Details and Dimensions
- Figure NB-4433-1 Types of Attachment Welds
- Figure NB-4440-1 Appurtenance Weld Joint Details, NPS 2 (DN 50) and Smaller
- Figure NB-4511-1 Brazed Connections for Appurtenances and Piping, NPS 1 (DN 25) and Smaller
- Figure NB-4622.9(d)(1)-1 Dissimilar Metal Repair Cavity Measurement
- Figure NB-3686.6-1 Reducers
- Tables [Go to Page]
- Table NB-2332(a)-1 Required Cv Values for Piping, Pumps, and Valves
- Table NB-2333-1 Required Cv Values for Bolting Material
- Table NB-2432.1-1 Sampling of Welding Materials for Chemical Analysis
- Table NB-2432.2(a)-1 Chemical Analysis for Reactor Vessel Welding Material
- Table NB-2432.2(a)-2 Chemical Analysis for Welding Material for Other Than Reactor Vessel Welds
- Table NB-2571-1 Required Examinations
- Table NB-3338.2(c)-1 Stress Indices for Nozzles
- Table NB-3339.3-1 Required Minimum Reinforcing Area, Ar
- Table NB-3339.7(c)-1 Stress Indices for Internal Pressure Loading
- Table NB-3641.1(a)-1 Values of A
- Table NB-3681(a)-1 Stress Indices for Use With Equations in NB-3650
- Table NB-3685.1-1 Curved Pipe or Welding End Elbows, Internal Pressure
- Table NB-3685.1-2 Curved Pipe or Welding End Elbows, Moment Loading ( ≥ 0.2)
- Table NB-4232-1 Maximum Allowable Offset in Final Welded Joints
- Table NB-4524-1 Maximum Design Temperatures for Brazing Filler Metal
- Table NB-4622.1-1 Mandatory Requirements for Postweld Heat Treatment of Welds
- Table NB-4622.4(c)-1 Alternative Holding Temperatures and Times
- Table NB-4622.7(b)-1 Exemptions to Mandatory PWHT
- Table NB-5111-1Thickness, IQI Designations, Essential Holes, and Wire Diameters
- ENDNOTES [Go to Page]
