2017 ASME Boiler & Pressure Vessel Code: An International Code: Section III: Rules for Construction of Nuclear Facility Components / Division 1 — Subsection ND / Class 3 Components

Table of Contents
List of Sections
	INTERPRETATIONS
	CODE CASES
Foreword
Statement of Policy on the Use of the 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
	1 Introduction
	2 Inquiry Format
	3 Code Revisions or Additions
	4 Code Cases
	5 Code Interpretations
	6 Submittals
Personnel
Organization of Section III
	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
	Subparagraph Breakdowns/Nested Lists Hierarchy
	Footnotes
	Submittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees
	Cross-References
Article ND-1000 Introduction
	ND-1100 Scope
		ND-1110 Aspects of Construction Covered by These Rules
		ND-1120 Temperature Limits
		ND-1130 Boundaries of Jurisdiction Applicable to This Subsection
Article ND-2000 Material
	ND-2100 General Requirements for Material
		ND-2110 Scope of Principal Terms Employed
		ND-2120 Pressure-Retaining Material
		ND-2130 Certification of Material
		ND-2140 Welding Material
		ND-2150 Material Identification
		ND-2160 Deterioration of Material in Service
		ND-2170 Heat Treatment to Enhance Impact Properties
		ND-2180 Procedures for Heat Treatment of Material
		ND-2190 Non-Pressure‐Retaining Material
	ND-2200 Material Test Coupons and Specimens for Ferritic Steel Material
		ND-2210 Heat Treatment Requirements
		ND-2220 Procedure for Obtaining Test Coupons and Specimens for Quenched and Tempered Material
	ND-2300 Fracture Toughness Requirements for Material
		ND-2310 Material to Be Impact Tested
		ND-2320 Impact Test Procedures
		ND-2330 Test Requirements and Acceptance Standards
		ND-2340 Number of Impact Tests Required
		ND-2350 Retests
		ND-2360 Calibration of Instruments and Equipment
	ND-2400 Welding Material
		ND-2410 General Requirements
		ND-2420 Required Tests
		ND-2430 Weld Metal Tests
		ND-2440 Storage and Handling of Welding Material
	ND-2500 Examination and Repair of Pressure-Retaining Material
		ND-2510 Pressure-Retaining Material
		ND-2530 Examination and Repair of Plate
		ND-2540 Examination and Repair of Forgings and Bars
		ND-2550 Examination and Repair of Seamless and (Welded Without Filler Metal) Tubular Products and Fittings
		ND-2560 Examination and Repair of Tubular Products and Fittings Welded With Filler Metal
		ND-2570 Examination and Repair of Statically and Centrifugally Cast Products
		ND-2580 Examination of Bolts, Studs, and Nuts
	ND-2600 Material Organizations’ Quality System Programs
		ND-2610 Documentation and Maintenance of Quality System Programs
	ND-2700 Dimensional Standards
Article ND-3000 Design
	ND-3100 General Design
		ND-3110 Loading Criteria
		ND-3120 Special Considerations
		ND-3130 General Design Rules
	ND-3300 Vessel Design
		ND-3310 General Requirements
		ND-3320 Design Considerations
		ND-3330 Openings and Reinforcement
		ND-3350 Design of Welded Construction
		ND-3360 Special Vessel Requirements
	ND-3400 Pump Design
		ND-3410 General Requirements for Centrifugal Pumps
		ND-3420 Definitions
		ND-3430 Design Requirements for Centrifugal Pumps
		ND-3440 Design of Specific Pump Types
		ND-3450 Design of Class 3 Reciprocating Pumps
	ND-3500 Valve Design
		ND-3510 General Requirements
		ND-3520 Levels B, C, and D Service Limits
		ND-3530 General Rules
		ND-3590 Pressure Relief Valve Design
	ND-3600 Piping Design
		ND-3610 General Requirements
		ND-3620 Design Considerations
		ND-3640 Pressure Design of Piping Products
		ND-3650 Analysis of Piping Systems
		ND-3660 Design of Welds
		ND-3670 Special Piping Requirements
		ND-3690 Dimensional Requirements for Piping Products
	ND-3700 Electrical and Mechanical Penetration Assemblies
		ND-3720 Design Rules
	ND-3800 Design of Atmospheric Storage Tanks
		ND-3810 General Requirements
		ND-3820 Design Considerations
		ND-3830 Bottom Design
		ND-3840 Shell Design
		ND-3850 Roof Design
		ND-3860 Tank Connections and Appurtenances
	ND-3900 Design of 0 psi to 15 psi (0 kPa to 100 kPa) Storage Tanks
		ND-3910 General Requirements
		ND-3920 Design Considerations
		ND-3930 Design Procedure
		ND-3940 Alternate Rules for Axial Compressive Membrane Stresses in the Cylindrical Walls of 0 psi to 15 psi Storage Tanks
Article ND-4000 Fabrication and Installation
	ND-4100 General Requirements
		ND-4110 Introduction
		ND-4120 Certification of Material and Fabrication by Component Certificate Holder
		ND-4130 Repair of Material
	ND-4200 Forming, Fitting, and Aligning
		ND-4210 Cutting, Forming, and Bending
		ND-4220 Forming Tolerances
		ND-4230 Fitting and Aligning
		ND-4240 Requirements for Weld Joints in Components
		ND-4250 Welding End Transitions — Maximum Envelope
	ND-4300 Welding Qualifications
		ND-4310 General Requirements
		ND-4320 Welding Qualifications, Records, and Identifying Stamps
		ND-4330 General Requirements for Welding Procedure Qualification Tests
		ND-4350 Special Qualification Requirements for Tube‐to‐Tubesheet Welds
	ND-4400 Rules Governing Making, Examining, and Repairing Welds
		ND-4410 Precautions to Be Taken Before Welding
		ND-4420 Rules for Making Welded Joints
		ND-4430 Welding of Attachments
		ND-4450 Repair of Weld Metal Defects
		ND-4460 Welded Test Plates
		ND-4470 Welded Stayed Construction
	ND-4500 Brazing
		ND-4510 Rules for Brazing
		ND-4520 Brazing Qualification Requirements
		ND-4530 Fitting and Aligning of Parts to Be Brazed
		ND-4540 Examination of Brazed Joints
	ND-4600 Heat Treatment
		ND-4610 Welding Preheat Requirements
		ND-4620 Postweld Heat Treatment
		ND-4630 Heat Treatment of Welds Other Than the Final Postweld Heat Treatment
		ND-4650 Heat Treatment After Bending or Forming for Pipe, Pumps, and Valves
		ND-4660 Heat Treatment of Electroslag Welds
	ND-4700 Mechanical Joints
		ND-4710 Bolting and Threading
		ND-4720 Bolting Flanged Joints
		ND-4730 Electrical and Mechanical Penetration Assemblies
	ND-4800 Expansion Joints
		ND-4810 Fabrication and Installation Rules for Bellows Expansion Joints
Article ND-5000 Examination
	ND-5100 General Requirements for Examination
		ND-5110 Procedures, Qualifications, and Evaluation
		ND-5120 Time of Examination of Welds and Weld Metal Cladding
	ND-5200 Examination of Welds
		ND-5210 Category A Vessel Welded Joints in Vessels and Similar Welded Joints in Piping, Pumps, and Valves
		ND-5220 Category B Vessel Welded Joints and Circumferential Welded Joints in Piping, Pumps, and Valves
		ND-5230 Category C Vessel Welded Joints and Similar Welded Joints in Piping, Pumps, and Valves
		ND-5240 Category D Vessel Welded Joints and Similar Joints in Piping, Pumps, and Valves
		ND-5260 Welded Stayed Construction
		ND-5270 Special Welds
		ND-5280 Welded Joints in Storage Tanks
	ND-5300 Acceptance Standards
		ND-5320 Radiographic Acceptance Standards
		ND-5330 Ultrasonic Acceptance Standards
		ND-5340 Magnetic Particle Acceptance Standards
		ND-5350 Liquid Penetrant Acceptance Standards
		ND-5360 Visual Acceptance Standards for Brazed Joints
		ND-5380 Gas and Bubble Formation Testing
	ND-5400 Spot Examination of Welded Joints
		ND-5410 General Requirements
		ND-5420 Minimum Extent of Spot Radiographic Examination
		ND-5430 Standards for Spot Radiographic Examination
		ND-5440 Evaluation and Retests
	ND-5500 Qualifications and Certification of Nondestructive Examination Personnel
		ND-5510 General Requirements
		ND-5520 Personnel Qualification, Certification, and Verification
		ND-5530 Records
	ND-5700 Examination Requirements for Expansion Joints
		ND-5720 Bellows Expansion Joints
Article ND-6000 Testing
	ND-6100 General Requirements
		ND-6110 Pressure Testing of Components, Appurtenances, and Systems
		ND-6120 Preparation for Testing
	ND-6200 Hydrostatic Tests
		ND-6210 Hydrostatic Test Procedure
		ND-6220 Hydrostatic Test Pressure Requirements
		ND-6230 Bellows Expansion Joints
		ND-6240 Provision for Embedded or Inaccessible Welded Joints in Piping
	ND-6300 Pneumatic Tests
		ND-6310 Pneumatic Testing Procedures
		ND-6320 Pneumatic Test Pressure Requirements
		ND-6330 Bellows Expansion Joints
	ND-6400 Pressure Test Gages
		ND-6410 Requirements for Pressure Test Gages
	ND-6500 Atmospheric and 0 psig to 15 psig (0 kPa to 100 kPa) Storage Tanks
		ND-6510 Testing of Atmospheric Storage Tanks
		ND-6520 Testing of 0 psig to 15 psig (0 kPa to 100 kPa) Storage Tanks
		ND-6530 Test Gages
	ND-6600 Special Test Pressure Situations
		ND-6610 Components Designed for External Pressure
		ND-6620 Pressure Testing of Combination Units
	ND-6900 Proof Tests to Establish Design Pressure
		ND-6910 General Requirements
		ND-6920 Procedures
		ND-6930 Procedure for Components Having Chambers of Special Shape Subject to Collapse
Article ND-7000 Overpressure Protection
	ND-7100 General Requirements
		ND-7110 Scope
		ND-7120 Integrated Overpressure Protection
		ND-7130 Verification of the Operation of Reclosing Pressure Relief Devices
		ND-7140 Installation
		ND-7150 Acceptable Pressure Relief Devices
		ND-7160 Unacceptable Pressure Relief Devices
		ND-7170 Permitted Use of Pressure Relief Devices
	ND-7200 Overpressure Protection Report
		ND-7210 Responsibility for Report
		ND-7220 Content of Report
		ND-7230 Certification of Report
		ND-7240 Review of Report After Installation
		ND-7250 Filing of Report
	ND-7300 Relieving Capacity Requirements
		ND-7310 Expected System Pressure Transient Conditions
		ND-7320 Unexpected System Excess Pressure Transient Conditions
		ND-7330 System Faulted Conditions
	ND-7400 Set Pressures of Pressure Relief Devices
		ND-7410 Set Pressure Limitations for Expected System Pressure Transient Conditions
		ND-7420 Set Pressure Limitations for Unexpected System Excess Pressure Transient Conditions
	ND-7500 Operating and Design Requirements for Pressure and Vacuum Relief Valves
		ND-7510 Safety, Safety Relief, and Relief Valves
		ND-7520 Pilot-Operated Pressure Relief Valves
		ND-7530 Power-Actuated Pressure Relief Valves
		ND-7540 Safety and Safety Relief Valves With Auxiliary Actuating Devices
		ND-7550 Vacuum Relief Valves
		ND-7560 Alternative Test Media
	ND-7600 Nonreclosing Pressure Relief Devices
		ND-7610 Rupture Disk Devices
		ND-7620 Installation Requirements
	ND-7700 Certification
		ND-7710 Responsibility for Certification of Pressure and Vacuum Relief Valves
		ND-7720 Responsibility for Certification of Nonreclosing Pressure Relief Devices
		ND-7730 Capacity Certification of Pressure Relief Valves — Compressible Fluids
		ND-7740 Capacity Certification of Pressure Relief Valves — Incompressible Fluids
		ND-7750 Capacity Certification of Vacuum Relief Valves
		ND-7760 Capacity Determination of Rupture Disk Devices
	ND-7800 Marking, Stamping With Certification Mark, and Data Reports
		ND-7810 Pressure and Vacuum Relief Valves
		ND-7820 Rupture Disk Devices
		ND-7830 Pressure Relief Valve in Combination With Rupture Disk Devices
		ND-7840 Certificate of Authorization to Use Certification Mark
Article ND-8000 Nameplates, Stamping With Certification Mark, and Reports
	ND-8100 General Requirements
Figures
	ND-1132.2-1 Attachments in the Component Support Load Path That Do Not Perform a Pressure-Retaining Function
	ND-1132.2-2 Attachments That Do Not Perform a Pressure-Retaining Function and Are Not in the Component Support Load Path
	ND-1132.2-3 Attachments That Perform a Pressure-Retaining Function
	ND-2433.1-1 Delta Ferrite Content
	ND-2575.2-1 Typical Pressure-Retaining Parts of Pumps and Valves
	ND-3133.4-1 Length L of Some Typical Conical Sections
	ND-3133.7-1 Chart for Determining Wall Thickness of Tubes Under External Pressure
	ND-3324.2-1 Principal Dimensions of Typical Heads
	ND-3324.11(a)(6)-1 Large Head Openings, Reverse Curve, and Conical Shell Reducer Sections
	ND-3325-1 Some Acceptable Types of Unstayed Flat Heads and Covers
	ND-3326.1-1 Spherically Dished Covers With Bolting Flanges
	ND-3329.1(e)-1 Acceptable Proportions for Ends or Through Stays
	ND-3329.6(b)-1 Example of Tube Spacing With Pitch of Holes Equal in Every Row
	ND-3329.6(b)-2 Example of Tube Spacing With Pitch of Holes Unequal in Every Second Row
	ND-3329.6(b)-3 Example of Tube Spacing With Pitch of Holes Varying in Every Second and Third Row
	ND-3329.6(d)-1 Example of Tube Spacing With Tube Holes on Diagonal Lines
	ND-3329.6(d)-2 Diagram for Determining the Efficiency of Longitudinal and Diagonal Ligaments Between Openings in Cylindrical Shells
	ND-3329.6(g)-1 Diagram for Determining Equivalent Longitudinal Efficiency of Diagonal Ligaments
	ND-3332.2-1 Chart for Determining Value of F
	ND-3335.1(b)-1 Some Representative Configurations Describing the te Reinforcement Dimension
	ND-3335.2-1 Arrangement of Multiple Openings
	ND-3335.3(b)-1 Minimum Depth for Flange of Flued Openings
	ND-3351-1 Welded Joint Locations Typical of Categories A, B, C, and D
	ND-3352-1 Typical Butt Joints
	ND-3358.1(a)-1 Heads Attached to Shells
	ND-3361.1-1 Butt Welding of Plates of Unequal Thicknesses
	ND-3423-1 Typical Single Volute Casing
	ND-3423-2 Typical Double Volute Casing
	ND-3433.4-1 Minimum Tangential Inlet and Outlet Wall Thicknesses
	ND-3436(c)-1 External and Internal Attachments
	ND-3441.1-1 Type a Pump
	ND-3441.1-2 Type a Pump
	ND-3441.1(a)-1 Type A Pump
	ND-3441.2-1 Type B Pump
	ND-3441.3-1 Type C Pump
	ND-3441.3-2 Type C Pump
	ND-3441.4(a)-1 Type D Pump
	ND-3441.5-1 Type E Pump
	ND-3441.6(a)-1 Type F Pump
	ND-3441.7(a)-1 Axially Split Casing, Volute Pump, Type G
	ND-3441.7(a)-2 Axially Split Casing, Volute Pump, Type G
	ND-3441.7(c)-1 Axially Split Casing, Volute Pump, Type G
	ND-3441.7(c)(2)-1 Typical Section of Type G Pump
	ND-3441.7(c)(2)-2 Typical Section of Type G Pump
	ND-3441.7(c)(2)-3 Typical Loads on Type G Pump
	ND-3441.8-1 Longitudinal Section Through Type H Pump
	ND-3441.8-2 Transverse Section Through Type H Pump
	ND-3441.9-1 Type K Pump
	ND-3441.9-2 Type K Pump
	ND-3441.10-1 Type L Pump
	ND-3441.10-2 Type L Pump Bowl
	ND-3451(a)-1 Horizontal Single‐Acting Power Pump Liquid Ends
	ND-3521-1 Typical Sections of Valve Bodies
	ND-3591.1-1 Typical Pressure Relief Devices
	ND-3591.1-2 Typical Pressure Relief Devices
	ND-3595.3-1 Valve Nozzle
	ND-3622-1 Examples of Reversing and Nonreversing Dynamic Loads
	ND-3643.2(b)-1 Typical Welded Branch Connections
	ND-3643.2(b)-2 Typical Right Angle Branch Connections Made Using a Fillet Weld or a Partial Penetration Weld
	ND-3643.3(c)(1)-1 Reinforcement of Branch Connections
	ND-3643.3(c)(1)-2 Some Representative Configurations Describing the te Reinforcement Dimension
	ND-3643.4(a)-1 Reinforced Extruded Outlets
	ND-3647.2-1 Types of Permanent Blanks
	ND-3653.3-1 Reducing or Full Outlet Branch Connections, or Tees
	ND-3673.2(b)-2 Branch Connection Nomenclature
	ND-3861-1 Roof Manholes
	ND-3862(a)-1 Flanged Roof Nozzles
	ND-3862(a)-2 Screwed or Socket Weld Roof Nozzles
	ND-3863-1 Welded Bottom Outlet Elbow
	ND-3922.1-1 Biaxial Stress Chart for Combined Tension and Compression, 30,000 psi to 38,000 psi (205 MPa to 260 MPa) Yield Strength Steels
	ND-3922.1-2 Reduction of Design Stresses Required to Allow for Biaxial Stresses of Opposite Sign
	ND-3932.1-1 Some Typical Free Body Diagrams for Certain Shapes of Tanks
	ND-3933.4(a)-1 Compression Ring Region
	ND-3933.5(d)-1 Permissible Details of Compression Ring Construction
	ND-3944-1 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 25 ksi at Temperatures ≤ 300°F
	ND-3944-1M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 175 MPa at Temperatures ≤ 150°C
	ND-3944-2 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 30 ksi at Temperatures ≤ 300°F
	ND-3944-2M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 210 MPa at Temperatures ≤ 150°C
	ND-3944-3 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 35 ksi at Temperatures ≤ 300°F
	ND-3944-3M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 245 MPa at Temperatures ≤ 150°C
	ND-3944-4 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 40 ksi at Temperatures ≤ 300°F
	ND-3944-4M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 280 MPa at Temperatures ≤ 150°C
	ND-3944-5 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 45 ksi at Temperatures ≤ 300°F
	ND-3944-5M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 315 MPa at Temperatures ≤ 150°C
	ND-3944-6 Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 50 ksi at Temperatures ≤ 300°F
	ND-3944-6M Design Factor Times Allowable Axial Membrane Compressive Stress Versus Radius Over Thickness for Ferrous Materials With Yield Strengths of 350 MPa at Temperatures ≤ 150°C
	ND-3947-1 Meridional Straightness Tolerance
	ND-4221.1-1 Maximum Difference in Cross‐Sectional Diameters
	ND-4221.2(a)-1 Maximum Permissible Deviation e From a True Circular Form
	ND-4221.2(a)-2 Maximum Arc Length for Determining Plus or Minus Deviation
	ND-4233-1 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
	ND-4243-1 Attachment of Pressure Parts to Plates to Form a Corner Joint
	ND-4243.1-1 Typical Flat Heads, and Supported and Unsupported Tubesheets With Hubs
	ND-4244(a)-1 Nozzles, and Branch and Piping Connections Joined by Full Penetration Butt Welds
	ND-4244(b)-1 Nozzles, and Branch and Piping Connections Joined by Full Penetration Corner Welds
	ND-4244(c)-1 Deposited Weld Metal Used as Reinforcement of Openings for Nozzles, and Branch and Piping Connections
	ND-4244(d)-1 Some Acceptable Types of Welded Nozzles, and Branch and Piping Connections
	ND-4244(e)-1 Some Acceptable Types of Welded Nozzles
	ND-4244(e)-2 Some Acceptable Types of Small Fittings
	ND-4244(f)-1 Tube Connections
	ND-4244(g)-1 Some Acceptable Types of Welded Nozzles, and Branch and Piping Connections
	ND-4245-1 Attachment Welds
	ND-4246.1(a)-1 Typical Bottom and Bottom‐to‐Shell Joints
	ND-4246.3-1 Typical Roof and Roof‐to‐Shell Joints
	ND-4246.5-1 Roof Manholes
	ND-4246.5-2 Flanged Roof Nozzles
	ND-4246.5-3 Screwed or Socket Weld Roof Nozzles
	ND-4246.5-4 Welded Bottom Outlet Elbow
	ND-4250-1 Welding End Transitions Maximum Envelope
	ND-4427-1 Fillet and Socket Weld Details and Dimensions
	ND-4433-1 Types of Attachment Welds
	ND-4437.2(b)-1 Some Acceptable Methods of Attaching Stiffening Rings to Shells of Cylindrical Vessels Subjected to External Pressure
	ND-4470-1 Welded Stayed Construction
	ND-4511-1 Brazed Connections for Appurtenances and Piping, NPS 4
	ND-4730-1 Penetration Assembly
	ND-4810(c)-1 Permissible Attachment Welds for Bellows
	ND-7734.2(a)-1 Values of F for Nonchoking Flow
	ND-7754.2(a)-1 Values of F for Nonchoking Flow
Tables
	ND-2311-1 Exemptions From Impact Testing Under ND-2311(a)(8)
	ND-2331(a)-1 Required Cv Lateral Expansion Values for Pressure-Retaining Material (Except Bolting)
	ND-2331(a)-2 Required Cv Energy Values for Pressure-Retaining Material (Except Bolting)
	ND-2333-1 Required Cv Values for Bolting Material
	ND-2432.1-1 Sampling of Welding Materials for Chemical Analysis
	ND-2432.2-1 Welding Material Chemical Analysis
	ND-2571-1 Required Examinations
	ND-3321-1 Stress Limits for Design and Service Loadings
	ND-3321-2 Classification of Stress in Vessels for Some Typical Cases
	ND-3324.2-1 Values of Factor K
	ND-3324.8(b)-1 Values of Factor M
	ND-3324.11(b)(2)-1 Values of Δ for Junctions at the Large Cylinder for α ≤ 30 deg
	ND-3324.11(b)(3)-1 Values of Δ for Junctions at the Small Cylinder for α ≤ 30 deg
	ND-3332.2-1 Values of Spherical Radius Factor K1
	ND-3361.3(a)-1 Minimum Number of Pipe Threads for Connections
	ND-3416-1 Stress and Pressure Limits for Design and Service Loadings
	ND-3521-1 Level A, Level B, Level C, and Level D Service Limits
	ND-3592.2(b)-1 Class 3 Pressure Relief Devices: Level B, C, and D Service Loadings
	ND-3611.2(e)-1 Stress Range Reduction Factors
	ND-3613.4-1 Weld Joint Efficiency Factor
	ND-3641.1(a)-1 Values of A
	ND-3673.2(b)-1 Stress Indices, Flexibility, and Stress Intensification Factors
	ND-3821.5-1 Design and Service Limits
	ND-3852.7-1 Allowable Tensile Stresses for Roof Supports
	ND-3852.7-2 Allowable Axial Compression Stresses for Roof Supports
	ND-3852.7-3 Allowable Bending Stresses for Roof Supports
	ND-3852.7-4 Allowable Shear Stresses for Roof Supports
	ND-3852.7-5 Allowable Shear and Tension Stresses for Bolts for Roof Supports
	ND-3852.7-6 Allowable Bearing Stresses for Bolts for Roof Supports
	ND-3861-1 Roof Manholes
	ND-3862(a)-1 Flanged Roof Nozzles
	ND-3862(a)-2 Screwed or Socket Weld Roof Nozzles
	ND-3863-1 Welded Bottom Outlet Elbow
	ND-3865-1 Platforms and Walkways
	ND-3865-2 Stairways
	ND-3865-3 Stairway Rise, Run, and Angle Relationships
	ND-3921.8-1 Design and Service Limits for Steel Tanks
	ND-3923.1-1 Maximum Allowable Stress Values for Structural Members
	ND-3932.2(d)-1 Factors for Determining Values of R1 and R2 for 2:1 Ellipsoidal Roofs and Bottoms
	ND-3933.5(h)-1 Some Values for k Based on n, θ
	ND-4232(a)-1 Maximum Allowable Offset in Final Welded Joints
	ND-4245-1
	ND-4247.6(d)-1 Minimum Size for Fillet Welds
	ND-4524-1 Maximum Design Temperatures for Brazing Filler Metal, °F (°C)
	ND-4622.1-1 Mandatory Requirements for Postweld Heat Treatment of Welds
	ND-4622.4(c)-1 Alternative Holding Temperatures and Times
	ND-4622.7(b)-1 Exemptions to Mandatory PWHT
	ND-5211.2-1 Thickness Above Which Full Radiographic Examination of Butt-Welded Joint is Mandatory
Endnotes