ASME BPVC III 1 NB 2021
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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
| Published By | Publication Date | Number of Pages |
| ASME | 2021 |
This Subsection contains requirements for the material, design, fabrication, examination, testing and overpressure protection of items which are intended to conform to the requirements for Class 1 construction. The rules of Subsection NB cover the requirements for assuring the structural integrity of items. Careful application of this Section will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | TABLE OF CONTENTS |
| 9 | LIST OF SECTIONS |
| 10 | INTERPRETATIONS CODE CASES |
| 11 | FOREWORD |
| 13 | 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 |
| 14 | SUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER AND PRESSURE VESSEL STANDARDS COMMITTEES |
| 17 | Personnel ASME Boiler and Pressure Vessel Standards Committees, Subgroups, and Working Groups |
| 38 | ORGANIZATION OF SECTION III 1 GENERAL |
| 39 | 2 SUBSECTIONS 3 ARTICLES 4 SUBARTICLES 5 SUBSUBARTICLES 6 PARAGRAPHS 7 SUBPARAGRAPHS 8 SUBSUBPARAGRAPHS |
| 40 | 9 REFERENCES |
| 42 | SUMMARY OF CHANGES |
| 44 | LIST OF CHANGES IN RECORD NUMBER ORDER |
| 45 | CROSS-REFERENCING AND STYLISTIC CHANGES IN THE BOILER AND PRESSURE VESSEL CODE |
| 47 | Article NB-1000 Introduction NB-1100 Scope NB-1110 Aspects of Construction Covered by These Rules NB-1120 Temperature Limits NB-1130 Boundaries of Jurisdiction Applicable to This Subsection |
| 48 | NB-1140 Electrical and Mechanical Penetration Assemblies |
| 49 | Figures Figure NB-1132.2-1 Attachments in the Component Support Load Path That Do Not Perform a Pressure-Retaining Function |
| 50 | 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) |
| 51 | Figure NB-1132.2-3 Attachments That Perform a Pressure-Retaining Function |
| 52 | Figure NB-1132.2-4 Attachments Within the Reactor Pressure Vessel (Core Support Structures) That Do Not Perform a Pressure-Retaining Function |
| 53 | Article NB-2000 Material NB-2100 General Requirements for Material NB-2110 Scope of Principal Terms Employed NB-2120 Pressure‑Retaining Material |
| 55 | 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 |
| 56 | NB-2190 Non-Pressure‑Retaining Material NB-2200 Material Test Coupons and Specimens for Ferritic Steel Material NB-2210 Heat Treatment Requirements NB-2220 Procedure for Obtaining Test Coupons and Specimens for Quenched and Tempered Material |
| 58 | NB-2300 Fracture Toughness Requirements for Material NB-2310 Material to Be Impact Tested |
| 59 | NB-2320 Impact Test Procedures |
| 60 | NB-2330 Test Requirements and Acceptance Standards2 Tables Table NB-2332(a)-1 Required Cv Values for Piping, Pumps, and Valves |
| 61 | NB-2340 Number of Impact Tests Required Table NB-2333-1 Required Cv Values for Bolting Material |
| 62 | NB-2350 Retests NB-2360 Calibration of Instruments and Equipment NB-2400 Welding Material NB-2410 General Requirements NB-2420 Required Tests |
| 63 | NB-2430 Weld Metal Tests |
| 64 | Table NB-2432.1-1 Sampling of Welding Materials for Chemical Analysis |
| 65 | NB-2440 Storage and Handling of Welding Material NB-2500 Examination and Repair of Pressure‑Retaining Material NB-2510 Examination of Pressure‑Retaining Material 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 |
| 66 | NB-2520 Examination After Quenching and Tempering NB-2530 Examination and Repair of Plate Figure NB-2433.1-1 Weld Metal Delta Ferrite Content |
| 68 | NB-2540 Examination and Repair of Forgings and Bars |
| 70 | NB-2550 Examination and Repair of Seamless and Welded (Without Filler Metal) Tubular Products and Fittings |
| 71 | Figure NB-2552-1 Axial Propagation of Sound in Tube Wall |
| 73 | NB-2560 Examination and Repair of Tubular Products and Fittings Welded With Filler Metal |
| 74 | NB-2570 Examination and Repair of Statically and Centrifugally Cast Products |
| 75 | Table NB-2571-1 Required Examinations |
| 78 | Figure NB-2575.2-1 Typical Pressure-Retaining Parts of Pumps and Valves |
| 80 | NB-2580 Examination of Bolts, Studs, and Nuts |
| 82 | NB-2600 Material Organizations’ Quality System Programs NB-2610 Documentation and Maintenance of Quality System Programs NB-2700 Dimensional Standards |
| 83 | Article NB-3000 Design NB-3100 General Design NB-3110 Loading Criteria |
| 84 | NB-3120 Special Considerations NB-3130 General Design Rules |
| 88 | NB-3200 Design by Analysis NB-3210 Requirements for Acceptability NB-3300 Vessel Design NB-3310 General Requirements NB-3320 Design Considerations |
| 89 | NB-3330 Openings and Reinforcement |
| 90 | Figure NB-3332.2-1 Chart for Determining Value of F |
| 92 | Figure NB-3338.2(a)-1 Direction of Stress Components |
| 93 | Figure NB-3338.2(a)-2 Nozzle Dimensions |
| 94 | Table NB-3338.2(c)-1 Stress Indices for Nozzles |
| 95 | Figure NB-3339.1(b)-1 Examples of Acceptable Transition Details |
| 96 | NB-3340 Analysis of Vessels NB-3350 Design of Welded Construction Table NB-3339.3-1 Required Minimum Reinforcing Area, Ar |
| 97 | Figure NB-3339.4-1 Limits of Reinforcing Zone Table NB-3339.7(c)-1 Stress Indices for Internal Pressure Loading |
| 98 | Figure NB-3351-1 Welded Joint Locations Typical of Categories A, B, C, and D |
| 99 | Figure NB-3352-1 Typical Butt Joints |
| 100 | NB-3360 Special Vessel Requirements Figure NB-3361-1 Category A and B Joints Between Sections of Unequal Thickness |
| 101 | NB-3400 Pump Design NB-3410 General Requirements for Centrifugal Pumps |
| 102 | NB-3420 Definitions NB-3430 Design Requirements for Centrifugal Pumps Figure NB-3423-1 Typical Single Volute Casing |
| 103 | Figure NB-3423-2 Typical Double Volute Casing Figure NB-3433.4-1 Minimum Tangential Inlet and Outlet Wall Thickness |
| 104 | NB-3440 Design of Specific Pump Types NB-3500 Valve Design NB-3510 Acceptability |
| 105 | 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 |
| 106 | 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 |
| 107 | Figure NB-3441.6(a)-1 Type F Pump |
| 108 | NB-3520 Design Considerations |
| 109 | NB-3530 General Rules |
| 111 | NB-3540 Design of Pressure-Retaining Parts |
| 112 | Figure NB-3544.1(a)-1 Fillets and Corners |
| 113 | Figure NB-3544.1(c)-1 Ring Grooves |
| 114 | Figure NB-3544.3-1 Lugs and Protuberances Figure NB-3544.7-1 Flat Wall Limitation |
| 116 | Figure NB-3545.1(a)-1 Pressure Area Method |
| 119 | Figure NB-3545.2(a)-1 Critical Sections of Valve Bodies |
| 121 | Figure NB-3545.2(c)-1 Model for Determining Secondary Stress in Valve Crotch Region |
| 122 | Figure NB-3545.2(c)-3 Thermal Stress Index Versus Thickness Continuity Run or Branch |
| 123 | Figure NB-3545.2(c)-4 Secondary Stress Index Versus Thickness Discontinuity Run or Branch |
| 124 | Figure NB-3545.2(c)-5 C4 Versus Te1/te Figure NB-3545.2(c)-6 Stress Index for Thermal Fatigue |
| 125 | NB-3550 Cyclic Loading Requirements |
| 126 | NB-3560 Design Reports NB-3590 Pressure Relief Valve Design |
| 127 | Figure NB-3591.2-1 Typical Pressure Relief Devices |
| 128 | Figure NB-3591.2-2 Typical Pressure Relief and Safety Relief Devices |
| 130 | Figure NB-3594.3-1 Valve Nozzle |
| 131 | NB-3600 Piping Design NB-3610 General Requirements |
| 132 | NB-3620 Design Considerations |
| 133 | Figure NB-3622-1 Examples of Reversing and Nonreversing Dynamic Loads |
| 134 | NB-3630 Piping Design and Analysis Criteria |
| 135 | NB-3640 Pressure Design |
| 136 | Table NB-3641.1(a)-1 Values of A |
| 138 | Figure NB-3643.3(a)-1 Branch Connection Nomenclature |
| 139 | Figure NB-3643.3(a)-2 Typical Reinforcement of Openings |
| 140 | Figure NB-3643.3(a)-3 Typical Reinforced Extruded Outlet |
| 142 | Figure NB-3644(b)-1 Miter Joint Geometry |
| 143 | Figure NB-3647.2-1 Types of Permanent Blanks |
| 144 | NB-3650 Analysis of Piping Products |
| 147 | Figure NB-3653.2(b)-1 Decomposition of Temperature Distribution Range |
| 151 | NB-3660 Design of Welds NB-3670 Special Piping Requirements |
| 153 | NB-3680 Stress Indices and Flexibility Factors |
| 154 | Table NB-3681(a)-1 Stress Indices for Use With Equations in NB-3650 |
| 156 | Figure NB-3683.1(c)-1 |
| 157 | Figure NB-3683.1(d)-1 |
| 159 | Figure NB-3683.6-1 |
| 162 | Figure NB-3684-1 Direction of Stress Components |
| 163 | Table NB-3685.1-1 Curved Pipe or Welding End Elbows, Internal Pressure |
| 164 | Table NB-3685.1-2 Curved Pipe or Welding End Elbows, Moment Loading ( ≥ 0.2) |
| 165 | Figure NB-3685.2-1 Elbow Nomenclature |
| 166 | NB-3690 Dimensional Requirements for Piping Products Figure NB-3686.1-1 |
| 167 | Figure NB-3686.2-1 Figure NB-3686.5-1 Branch Connections in Straight Pipe Figure NB-3686.6-1 Reducers |
| 168 | Article NB-4000 Fabrication and Installation NB-4100 General Requirements NB-4110 Introduction NB-4120 Certification of Materials and Fabrication by Certificate Holder |
| 169 | NB-4130 Repair of Material NB-4200 Forming, Fitting, and Aligning NB-4210 Cutting, Forming, and Bending |
| 170 | NB-4220 Forming Tolerances |
| 171 | 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 |
| 172 | Figure NB-4221.2(a)-2 Maximum Arc Length for Determining Plus or Minus Deviation |
| 173 | NB-4230 Fitting and Aligning Table NB-4232-1 Maximum Allowable Offset in Final Welded Joints |
| 174 | NB-4240 Requirements for Weld Joints in Components 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 |
| 175 | NB-4250 Welding End Transitions — Maximum Envelope NB-4300 Welding Qualifications NB-4310 General Requirements |
| 176 | Figure NB-4243-1 Acceptable Full Penetration Weld Details for Category C Joints (NB-3352.3) |
| 177 | Figure NB-4244(a)-1 Nozzles Joined by Full Penetration Butt Welds |
| 178 | Figure NB-4244(b)-1 Nozzles Joined by Full Penetration Corner Welds |
| 179 | Figure NB-4244(c)-1 Deposited Weld Metal Used as Reinforcement of Openings for Nozzles |
| 180 | Figure NB-4244(d)-1 Partial Penetration Nozzles |
| 181 | Figure NB-4244(d)-2 Partial Penetration Nozzle for Coaxial Cylinders |
| 182 | Figure NB-4244(e)-1 Oblique Connections |
| 183 | Figure NB-4246(a)-1 Typical Piping Branch Connections Joined by Full Penetration Welds |
| 184 | Figure NB-4246(b)-1 Typical Piping Branch Connections Joined by a Fillet Weld or a Partial Penetration Weld |
| 185 | Figure NB-4250-1 Welding End Transitions — Maximum Envelope |
| 186 | Figure NB-4250-2 Component to Pipe Weld Figure NB-4250-3 Pipe to Pipe Weld |
| 187 | NB-4320 Welding Qualifications, Records, and Identifying Stamps |
| 188 | NB-4330 General Requirements for Welding Procedure Qualification Tests |
| 191 | NB-4350 Special Qualification Requirements for Tube‑to‑Tubesheet Welds NB-4360 Qualification Requirements for Welding Specially Designed Welded Seals |
| 192 | NB-4400 Rules Governing Making, Examining, and Repairing Welds NB-4410 Precautions to Be Taken Before Welding NB-4420 Rules for Making Welded Joints |
| 194 | Figure NB-4424.2-1 Preservice Examination Marking for Piping |
| 195 | Figure NB-4427-1 Fillet and Socket Weld Details and Dimensions |
| 196 | NB-4430 Welding of Attachments NB-4440 Welding of Appurtenances NB-4450 Repair of Weld Metal Defects |
| 197 | Figure NB-4433-1 Types of Attachment Welds |
| 198 | Figure NB-4440-1 Appurtenance Weld Joint Details, NPS 2 (DN 50) and Smaller |
| 199 | NB-4500 Brazing NB-4510 Rules for Brazing |
| 200 | Figure NB-4511-1 Brazed Connections for Appurtenances and Piping, NPS 1 (DN 25) and Smaller |
| 201 | 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 NB-4610 Welding Preheat Requirements Table NB-4524-1 Maximum Design Temperatures for Brazing Filler Metal |
| 202 | NB-4620 Postweld Heat Treatment |
| 203 | Table NB-4622.1-1 Mandatory Requirements for Postweld Heat Treatment of Welds |
| 204 | Table NB-4622.4(c)-1 Alternative Holding Temperatures and Times |
| 205 | Table NB-4622.7(b)-1 Exemptions to Mandatory PWHT |
| 208 | Figure NB-4622.9(d)(1)-1 Dissimilar Metal Repair Cavity Measurement |
| 209 | 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 |
| 210 | NB-4660 Heat Treatment of Electroslag Welds NB-4700 Mechanical Joints NB-4710 Bolting and Threading NB-4720 Bolting Flanged Joints NB-4730 Electrical and Mechanical Penetration Assemblies |
| 211 | Article NB-5000 Examination NB-5100 General Requirements for Examination NB-5110 Methods, Nondestructive Examination Procedures, and Cleaning Table NB-5111-1Thickness, IQI Designations, Essential Holes, and Wire Diameters |
| 212 | NB-5120 Time of Examination of Welds and Weld Metal Cladding NB-5130 Examination of Weld Edge Preparation Surfaces |
| 213 | NB-5140 Examination of Welds and Adjacent Base Material NB-5200 Required Examination of Welds for Fabrication and Preservice Baseline 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 |
| 214 | 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 |
| 215 | NB-5270 Special Welded Joints NB-5280 Preservice Examination |
| 216 | NB-5300 Acceptance Standards NB-5320 Radiographic Acceptance Standards NB-5330 Ultrasonic Acceptance Standards NB-5340 Magnetic Particle Acceptance Standards |
| 217 | 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 NB-5410 Examination After Hydrostatic Test NB-5500 Qualifications and Certification of Nondestructive Examination Personnel NB-5510 General Requirements |
| 218 | NB-5520 Personnel Qualification, Certification, and Verification |
| 219 | NB-5530 Records |
| 220 | Article NB-6000 Testing NB-6100 General Requirements NB-6110 Pressure Testing of Components, Appurtenances, and Systems |
| 221 | NB-6120 Preparation for Testing NB-6200 Hydrostatic Tests NB-6210 Hydrostatic Test Procedure NB-6220 Hydrostatic Test Pressure Requirements |
| 222 | NB-6300 Pneumatic Tests NB-6310 Pneumatic Testing Procedures NB-6320 Pneumatic Test Pressure Requirements NB-6400 Pressure Test Gages NB-6410 |
| 223 | NB-6600 Special Test Pressure Situations NB-6610 Components Designed for External Pressure NB-6620 Pressure Testing of Combination Units |
| 224 | Article NB-7000 Overpressure Protection NB-7100 General Requirements NB-7110 Scope NB-7120 Integrated Overpressure Protection NB-7130 Verification of the Operation of Reclosing Pressure Relief Devices NB-7140 Installation |
| 225 | NB-7150 Acceptable Pressure Relief Devices NB-7160 Unacceptable Pressure Relief Devices NB-7170 Permitted Use of Pressure Relief Devices |
| 226 | NB-7200 Overpressure Protection Report NB-7210 Responsibility for Report NB-7220 Content of Report |
| 227 | NB-7230 Certification of Report NB-7240 Review of Report After Installation NB-7250 Filing of Report NB-7300 Relieving Capacity NB-7310 Expected System Pressure Transient Conditions NB-7320 Unexpected System Excess Pressure Transient Conditions |
| 228 | NB-7400 Set Pressures of Pressure Relief Devices 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 NB-7510 Safety, Safety Relief, and Relief Valves |
| 229 | NB-7520 Pilot-Operated Pressure Relief Valves |
| 230 | NB-7530 Power-Actuated Pressure Relief Valves |
| 231 | NB-7540 Safety Valves and Pilot-Operated Pressure Relief Valves With Auxiliary Actuating Devices |
| 232 | NB-7550 Alternative Test Media NB-7600 Nonreclosing Pressure Relief Devices NB-7610 Rupture Disk Devices |
| 233 | NB-7620 Installation NB-7700 Certification 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 NB-7810 Pressure Relief Valves |
| 234 | NB-7820 Rupture Disk Devices NB-7830 Certificate of Authorization to Use Certification Mark |
| 235 | Article NB-8000 Nameplates, Stamping With Certification Mark, and Reports NB-8100 General Requirements |
| 236 | ENDNOTES |
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