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ASME BPVC IV 2021

ASME BPVC IV 2021

$377.00

ASME BPVC – IV -2021 BPVC Section IV, Rules for Construction of Heating Boilers

Published By Publication Date Number of Pages
ASME 2021 283
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This Section provides requirements for design, fabrication, installation and inspection of steam heating, hot water heating, hot water supply boilers, and potable water heaters intended for low pressure service that are directly fired by oil, gas, electricity, coal or other solid or liquid fuels. It contains appendices which cover approval of new material, methods of checking safety valve and safety relief valve capacity, examples of methods of checking safety valve and safety relief valve capacity, examples of methods of calculation and computation, definitions relating to boiler design and welding, and quality control systems. Rules pertaining to use of the H, HV, and HLW ASME Product Certification Marks are also included. 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. Intended for manufacturers, users, constructors, designers and others concerned with the design, fabrication, assembly, erection, examination, inspection and testing of pressure vessels, plus all potential governing entities.

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PDF Pages PDF Title
5 TABLE OF CONTENTS
16 LIST OF SECTIONS
17 INTERPRETATIONS
CODE CASES
18 FOREWORD
20 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
21 SUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER AND PRESSURE VESSEL STANDARDS COMMITTEES
24 PERSONNEL
45 PREAMBLE
46 SUMMARY OF CHANGES
50 LIST OF CHANGES IN RECORD NUMBER ORDER
51 CROSS-REFERENCING AND STYLISTIC CHANGES IN THE BOILER AND PRESSURE VESSEL CODE
53 Part HG General Requirements for All Materials of Construction
Article 1 Scope and Service Restrictions
HG-100 Scope
HG-101 Service Restrictions
HG-101.1 Service Restrictions.
HG-101.2 Services in Excess of Those Covered by This Section.
HG-102 Units
54 HG-103 Tolerances
55 Article 2 Material Requirements
HG-200 General Material Requirements
HG-200.1 Materials Subject to Pressure Stress.
HG-200.2 Internal Parts Subject to Deterioration.
HG-200.3 Materials Not Found in Section II.
HG-200.4 Materials Use Not Limited by Specification Title.
HG-200.5 Materials Use Not Limited by Method of Production.
HG-200.6 Materials With Thicknesses Exceeding Specification Limits.
HG-200.7 Nonpressure Part Materials.
HG-201 Specific Material Requirements
56 Article 3 Design
HG-300 Design Pressure
HG-300.1 Vacuum Boilers.
HG-301 Cylindrical Parts Under Internal Pressure
HG-301.1 General.
HG-301.2 Tubes.
HG-305 Formed Heads, Pressure on Concave Side
HG-305.1 General.
57 HG-305.2 Ellipsoidal Heads.
HG-305.3 Torispherical Heads.
HG-305.4 Hemispherical Heads.
HG-305.5 Formed Heads With Stays.
HG-305.6 Inside Crown Radius of Unstayed Heads.
HG-305.7 Heads Built up of Several Shapes.
HG-305.8 Length of Skirts.
HG-305.9 Permissible Diameter of Flat Spots on Formed Heads.
HG-306 Formed Heads, Pressure on Convex Side
HG-306.1
HG-307 Flat Heads
HG-307.1 General.
58 Figures
Figure HG-307 Some Acceptable Types of Unstayed Flat Heads and Covers
59 HG-307.2 Thickness of Circular, Flat, Unstayed Heads, Covers, and Blind Flanges.
HG-307.3 Thickness of Noncircular, Flat, Unstayed Heads, Covers, and Blind Flanges.
HG-307.4 Values of C for Use in Equations in HG-307.2 and HG-307.3.
61 HG-307.5 Electric Immersion Heating Element Support Plates.
HG-309 Spherically Dished Covers (Bolted Heads)
HG-309.1 Heads Concave to Pressure.
62 Figure HG-309 Spherically Dished Steel Plate Covers With Bolting Flanges
63 HG-312 Cylindrical Parts Under External Pressure
HG-312.1 Plain Type Furnaces.
HG-312.3 Procedure for Determining Wall Thickness of Plain Furnaces and Tubes.
64 HG-312.4 Ring Reinforced Type Furnace.
HG-312.5 Procedure for Determining Moment of Inertia of Stiffening Rings.
Figure HG-312.4 Acceptable Type of Ring-Reinforced Furnace
65 HG-312.6 Corrugated Furnaces.
HG-312.7 Combination Type Furnaces.
HG-312.8 Semicircular Furnaces or Crown Sheets Subjected to External Pressure.
Figure HG-312.7 Connection Between Plain and Corrugated Furnace
66 HG-320 Openings in Boilers, General Requirements
HG-320.1 Shape of Openings.
HG-320.2 Size of Openings.
Figure HG-312.8 Acceptable Type of Semicircular Furnace Reinforcement
67 HG-320.3 Strength and Design of Finished Openings.
HG-321 Reinforcement Required for Openings in Shells and Formed Heads
HG-321.1 General.
HG-321.2 Design for Internal Pressure.
68 HG-323 Flanged-In Openings in Formed Heads
HG-323.1 Reinforcement Requirements.
HG-323.2 Restrictions on Location.
HG-323.3 Minimum Thickness Requirements of Flanged-In Openings.
HG-323.4 Minimum Flange Depth.
HG-323.5 Minimum Gasket Bearing Surface.
HG-325 Reinforcement Required for Openings in Flat Heads
HG-325.1 General.
Figure HG-321 Chart for Determining Values of F
Tables
Table HG-321 Values of Spherical Radius Factor K1
69 HG-325.2 Specific Requirements.
HG-326 Limits of Metal Available for Reinforcement
HG-326.1 Designation of Limits of Reinforcement.
HG-326.2 Limits of Reinforcement Parallel to Boiler Shell.
HG-326.3 Limits of Reinforcement Normal to Boiler Shell.
HG-326.4 Use of Excess Boiler Shell and Other Thicknesses.
70 Figure HG-326.1 Some Representative Configurations Describing the Reinforcement Dimension, te, and the Finished Opening Dimension, d
71 HG-327 Strength of Reinforcement
HG-327.1 Strength of Nozzle and Added Material.
HG-327.2 Strength of Attachment Material.
HG-328 Reinforcement for Multiple Openings
HG-328.1 When Limits of Reinforcement Overlap.
HG-328.2 Combined Reinforcement for Multiple Openings.
HG-328.3 When Reinforcing Each of a Series of Openings Is Impractical.
72 Figure HG-326.2 Nomenclature and Formulas for Reinforced Openings
73 HG-330 Inspection and Access Openings
HG-330.1 General Inspection Openings.
HG-330.2 Manholes.
HG-330.3 Size of Manholes and Gasket Surfaces.
HG-330.4 Handholes and Washout Plugs.
HG-330.5 Access Doors.
74 HG-330.6 Modular Boilers.
HG-340 Stayed Surfaces
HG-340.1 Required Thickness and Design Pressure.
HG-340.2 Proportions of Through-Stays With Washers
HG-340.3 Maximum Pitch of Stays.
HG-340.4 Unsymmetrical Staying.
Figure HG-340.1 Pitch of Staybolts Adjacent to Upper Corners of Fireboxes
75 HG-340.5 Stay Distance to Corner Joints, Welded Joints, and Flanges.
HG-340.6 Allowable Pitch of Stays.
HG-341 Staybolts
HG-341.1 Threaded Staybolts.
HG-341.2 Staybolts Upset for Threading.
HG-341.3 Staybolts Fitted With Nuts.
HG-341.4 Welded-In Staybolts.
HG-342 Dimensions of Stays
HG-342.1 Required Area of Stays.
Figure HG-340.2 Acceptable Proportions for Ends of Through-Stays
Figure HG-340.3 Examples of Acceptable Corner Welds for Pressures Not Over 30 psi
76 Table HG-340 Allowable Pitch of Stays, in. (mm) (Limited by HG-340.3)
77 HG-342.2 Load Carried by Stays.
HG-342.3 Stays Longer Than 120 Diameters.
HG-342.4 Stays Fabricated by Welding.
HG-342.5 Minimum Cross-Sectional Area.
HG-342.6 Minimum Diameter of Nonferrous Stays.
HG-343 Dimensions of Diagonal Stays
HG-343.1 Required Area of Diagonal Stays.
HG-343.2 Diagonal Stays for Segments of Tubesheets.
HG-345 Staying of Heads
HG-345.1 General.
78 Figure HG-343 Details of Installation of Diagonal Stays
79 Figure HG-345.1(a) Sketch Showing Application of HG-345.1 to the Staying of Boilers
80 Figure HG-345.1(b) Sketch Showing Application of HG-345.1 to the Staying of Boilers
81 HG-346 Tubesheets with Firetubes Used as Stays
HG-346.1 Required Thickness, Maximum Pitch, and Design Pressure.
HG-346.2 Maximum Pitch of Firetubes Used as Stays.
HG-346.3 Calculating Firetubes Used as Stays.
HG-346.4 Dimensions and Welding of Firetubes Used as Stays.
HG-350 Ligaments
HG-350.1 General.
HG-350.2 Openings Parallel to Shell Axis.
HG-350.3 Openings Transverse to Shell Axis.
82 HG-350.4 Holes Along a Diagonal.
HG-360 Requirements for Tube Holes and Tube Attachments
HG-360.1 Tube Holes and Ends.
Figure HG-350.1 Example of Tube Spacing With Pitch of Holes Equal in Every Row
Figure HG-350.2 Example of Tube Spacing With Pitch of Holes Unequal in Every Second Row
83 HG-360.2 Attachment of Firetubes.
HG-360.3 Attachment of Watertubes.
Figure HG-350.3 Example of Tube Spacing With Pitch of Holes Varying in Every Second and Third Row
Figure HG-350.4 Example of Tube Spacing With Tube Holes on Diagonal Lines
84 HG-370 External Piping Connections
HG-370.1 Threaded Connections.
HG-370.2 Flanged Connections.
HG-370.3 Welded or Brazed Connections.
Table HG-360 Permitted O-Ring Materials
Table HG-370 Minimum Thickness of Material for Threaded Connections to Boilers
85 Article 4 Pressure-Relieving Devices
86 Article 4A Overpressure Protection
HG-400A General Requirements
HG-401A Responsibility
HG-402A Pressure Relief Valve Requirements
HG-402A.1 Pressure Relief Valve Requirements for Steam Boilers.
HG-402A.2 Pressure Relief Valve Requirements for Hot Water Heating and Supply Boilers.
87 HG-402A.3 Pressure Relief Valves for Tanks and Heat Exchangers.
88 HG-402A.4 Pressure Relief Valves for Potable Water Heaters.
HG-403A Heating Surface
89 Article 5 Tests, Inspection, and Marking
HG-500 Proof Tests to Establish Design Pressure
HG-501 General
HG-501.1 Types of Tests.
HG-501.2 Retests.
HG-501.3 Precautions.
HG-501.4 Pressure Application.
HG-501.5 Critical Areas.
HG-501.6 Yield Strength and Tensile Strength.
90 HG-502 Procedure
HG-502.1 Strain Measurement Test.
HG-502.2 Displacement Measurement Test.
91 HG-502.3 Bursting Tests.
HG-502.4 Brittle Coating Test Procedure.
92 HG-503 Tests of Parts Subject to Collapse
HG-504 Tests of Duplicate Parts
HG-505 Test Gages
HG-506 Inspection of Proof Tests
HG-510 Hydrostatic Tests
93 HG-511 Pneumatic Tests
HG-512 Pressure Relief Valve Accumulation Tests
HG-515 Inspection Tests and Certification of Boilers
HG-515.1 General.
94 HG-515.2 Manufacturerā€™s Responsibility.
HG-515.3 Inspection by an Authorized Inspector.
95 HG-515.4 Duty of Authorized Inspector.
HG-520 Master and Partial Data Reports
HG-520.1 Manufacturerā€™s Master Data Report.
HG-520.2 Partial Data Reports.
HG-520.3 Supplementary Sheet.
HG-520.4 Multiple Page Data Reports.
96 HG-530 Marking of Boilers
HG-530.1 Marking Requirements for Boilers (and Economizers Built to Mandatory Appendix 10) Other Than Those Constructed Primarily of Cast Iron or Cast Aluminum (See HG-530.2).
Figure HG-530.1 Official Certification Mark to Denote the American Society of Mechanical Engineersā€™ Standard
Figure HG-530.2 Steam and Water Boilers Form of Marking on Completed Boilers or Their Nameplates (Not Applicable for Boilers Constructed Primarily of Cast Iron)
97 HG-530.2 Marking Requirements for Cast Iron or Cast Aluminum Boilers.
Figure HG-530.3 Boilers Suitable for Water Only Form of Marking on Completed Boilers or Their Nameplates (Not Applicable for Boilers Constructed Primarily of Cast Iron)
98 Figure HG-530.4 Steam and Water Boilers Form of Data Cast or Marked on Cast Iron Boiler Sections
Figure HG-530.5 Boilers Suitable for Water Only Form of Data Cast or Marked on Cast Iron Boiler Sections
99 HG-530.3 Modular Boilers.
Figure HG-530.6 Boilers Suitable for Water Only Form of Data Cast or Marked on Cast Aluminum Boiler Sections
Figure HG-530.7 Steam and Water Boilers Form of Marking on Completed Cast Iron Boilers or Their Nameplates
Figure HG-530.8 Boilers Suitable for Water Only Form of Marking on Completed Cast Iron or Cast Aluminum Boilers or Their Nameplates
100 HG-531 Marking of Parts and Accessories
HG-532 Marking of Field-Assembled Wrought Boilers
HG-532.1 Responsibility of Manufacturer of Boiler Unit.
HG-532.2 Execution of Manufacturerā€™s Data Report.
Figure HG-531.1 Form of Marking on Part or Accessory ā€” H Designator
Figure HG-531.2 Form of Marking on Part or Accessory ā€” PRT Designator
101 HG-532.3 Applying the Certification Mark and Certifying Data Report Forms.
HG-533 Inspection and Marking of Field-Assembled Boiler Pressure Parts
HG-533.1 Authorized Assemblers and Welders.
HG-533.2 Execution of Data Report Sheet.
HG-533.3 Field Inspection by Authorized Inspector.
HG-533.4 Application of Assemblerā€™s Certification Mark.
HG-533.5 Application for Certification Mark With H Designator.
HG-533.6 Certificate of Field Inspection.
HG-533.7 Mechanical Field Assembly.
HG-534 Field-Assembled Cast Iron Boilers
HG-534.1 Hydrostatic Tests.
HG-534.2 Marking.
HG-534.3 Assembly Instructions.
HG-540 Certification Marks
HG-540.1 Authorization.
HG-540.2 Application for a Certificate of Authorization.
102 HG-540.3 Designated Oversight.
HG-540.4 Quality Control System.
HG-540.5 Evaluation for Authorization and Reauthorization.
HG-540.6 Authorization of Changes.
HG-540.7 Code Construction Before Receipt of Certificate of Authorization.
HG-540.8 Regulations on Use of the Certification Mark.
103 Article 6 Instruments, Fittings, and Controls
HG-600 General
HG-601 For Steam Heating Boilers
HG-602 Steam Gages
HG-603 Water Gage Glasses
104 HG-604 Water Column and Water Level Control Pipes
HG-605 Pressure Control
HG-606 Automatic Low-Water Fuel Cutoff and/or Water Feeding Device
105 HG-607 Modular Steam Heating Boilers
HG-610 For Hot Water Heating or Hot Water Supply Boilers
HG-611 Pressure or Altitude Gages
HG-612 Thermometers/Temperature Sensors
HG-613 Temperature Control
106 HG-614 Low-Water Fuel Cutoff
HG-615 Modular Hot Water Heating Boilers and Hot Water Supply Boilers
HG-620 For All Boilers
HG-621 Instruments, Fittings, and Controls Mounted Inside Boiler Jackets
HG-630 Electric Wiring
HG-631 Electrical Code Compliance
HG-632 Type Circuitry to be Used
107 HG-633 Limit Controls
HG-634 Shutdown Switches and Circuit Breakers
HG-640 Controls and Heat Generating Apparatus
108 Article 7 Installation Requirements
HG-700 Installation Requirements, All Boilers
HG-701 Mounting Pressure Relief Valves
HG-701.1 Permissible Mounting.
HG-701.2 Requirements for Common Connections for Two or More Valves.
HG-701.3 Threaded Connections.
HG-701.4 Prohibited Mountings.
HG-701.5 Use of Shutoff Valves Prohibited.
HG-701.6 Pressure Relief Valve Discharge Piping.
HG-701.7 Temperature and Pressure Relief Valves.
109 HG-703 Piping
HG-703.1 Provisions for Expansion and Contraction.
HG-703.2 Return Pipe Connections.
HG-705 Feedwater and Makeup Water Connections
HG-707 Oil Heaters
HG-708 Storage Tanks for Hot Water Supply Systems
HG-709 Provisions for Thermal Expansion in Hot Water Systems
110 Figure HG-703.1(a) Steam Boilers in Battery ā€” Pumped Return ā€” Acceptable Piping Installation
111 Figure HG-703.1(b )Steam Boilers in Battery ā€” Gravity Return ā€” Acceptable Piping Installation
112 Figure HG-703.2 Hot Water Boilers in Battery ā€” Acceptable Piping Installation
113 HG-709.1 Heating Systems With Open Expansion Tank.
HG-709.2 Closed Heating Systems.
HG-709.3 Hot Water Supply Systems
HG-710 Stop Valves
HG-710.1 For Single Steam Boilers.
HG-710.2 For Single Hot Water Heating Boilers.
HG-710.3 For Multiple Boiler Installations.
Table HG-709.2 Expansion Tank Capacities for Forced Hot Water Systems
114 HG-710.4 Modular Boilers.
HG-710.5 Type of Stop Valve(s).
HG-715 Bottom Blowoff and Drain Valves
HG-716 Modular Boilers
HG-720 Setting
Table HG-715 Size of Bottom Blowoff Piping, Valves, and Cocks
115 HG-725 Methods of Support
HG-725.1 Loadings.
HG-725.2 Boilers Over 72 in. (1ā€Š800 mm) in Diameter.
HG-725.3 Boilers Over 54 in. (1ā€Š400 mm). up to 72 in. (1ā€Š800 mm) in Diameter.
HG-725.4 Boilers up to 54 in. (1ā€Š400 mm) in Diameter.
HG-725.5 Supporting Members.
HG-725.6 Lugs or Hangers.
Figure HG-725(a) Spacing and Weld Details for Supporting Lugs in Pairs on Horizontal-Return Tubular Boiler
116 HG-725.7 Settings.
Figure HG-725(b) Welded Bracket Connection for Horizontal-Return Tubular Boiler
117 Part HF Requirements for Boilers Constructed of Wrought Materials
Article 1 General
HF-100 Scope
118 Article 2 Material Requirements
HF-200 General Material Requirements
HF-201 Plate
HF-202 Rods, Bars, and Shapes
HF-203 Prefabricated or Preformed Pressure Parts
HF-203.1 Cast, Forged, Rolled, or Die-Formed Standard Pressure Parts.
HF-203.2 Cast, Forged, Rolled, or Die-Formed Nonstandard Pressure Parts.
119 HF-203.3 Welded Standard Pressure Parts for Use Other Than the Shell of a Boiler.
HF-204 Pipe and Tubes
HF-204.1 Integrally Finned Tubes.
HF-204.2 Electric Resistance Welded Fin Tubes.
HF-204.4 Laser-Welded Fin Tubes.
120 HF-205 Material Not Fully Identified
HF-205.1 Acceptance by Authentic Test Record and Marking.
HF-205.2 Acceptance by Testing.
HF-205.3 Marking and Report on Tests of Nonidentified Material.
121 HF-206 Recertification of Material Produced to a Specification Not Permitted by This Section
HF-207 Austenitic Stainless Steel
HF-210 Maintaining Material Identification
122 Article 3 Design Stresses and Minimum Thicknesses
HF-300 Maximum Allowable Stress Values
HF-301 Minimum Thicknesses
HF-301.1 Ferrous Plates.
HF-301.2 Nonferrous Plates.
HF-302 Basis for Establishing Stress Values in Section II, Part D, Table 6A or Table 6B
Table HF-300.1 Maximum Allowable Stress Values for Ferrous Materials, ksi (Multiply by 1,000 to Obtain psi)
Table HF-300.1M Maximum Allowable Stress Values for Ferrous Materials, MPa
123 Table HF-300.2 Maximum Allowable Stress Values for Nonferrous Materials, ksi (Multiply by 1,000 to Obtain psi)
Table HF-300.2M Maximum Allowable Stress Values for Nonferrous Materials, MPa
124 Part HF ā€” Subpart HW Requirements for Boilers Fabricated by Welding
Article 4 General Requirements
HW-400 Scope
HW-401 Responsibility of Manufacturer or Contractor
125 Article 5 Material Requirements
HW-500 Permissible Materials
HW-501 Materials of Different Specifications
HW-502 Materials for Small Parts
126 Article 6 Welding Processes and Qualifications
HW-600 Welding Processes
HW-610 Welding Qualifications
HW-611 No Production Work Without Qualifications
HW-612 Interchange of Qualifying Tests Among Manufacturers Prohibited
HW-613 Maintenance of Records of Qualifications and Identifying Marks
127 Article 7 Design of Weldments
HW-700 Design of Welded Joints
HW-701 General Requirements
HW-701.1 Butt Joints.
HW-701.2 Lap Joints.
HW-701.3 Corner or Tee Joints.
HW-701.4 Single Fillet Joints for Lap Attachment of U-Bend Tubes.
128 HW-702 Joint Efficiencies
HW-702.1 Joint Efficiencies for External Pressure Design.
HW-703 Minimum Thickness of Welded Parts
HW-710 Welded Stays
HW-710.1 Insertion of Stays.
HW-710.2 Projection of Stays Exposed to Primary Furnace Gases.
HW-710.3 Welding of Stays.
HW-710.4 Welding of Diagonal Stays.
Figure HW-701.1 Butt Welding of Plates of Unequal Thickness
129 Figure HW-701.3 Some Forms of Attachments of Pressure Parts to Flat Plates to Form a Corner Joint (Tee Joint)
130 Figure HW-710.4(a) Some Acceptable Types of Diagonal Stays for Installation by Welding
Figure HW-710.4(b) Unacceptable Types of Diagonal Stays for Installation by Welding
131 HW-711 Heads or Tubesheets Attached by Welding
HW-711.1 Flanged Heads or Tubesheets.
HW-711.2 Unflanged Heads or Tubesheets.
HW-712 Furnace Attachments
HW-712.1 For Pressures Not More Than 30 psi (200 kPa).
HW-712.2 For Pressures in Excess of 30 psi. (200 kPa).
HW-713 Tubes Attached by Welding
132 HW-715 Head-to-Shell Attachments
HW-720 Openings in Welds
HW-730 Welded Connections
HW-730.1 Strength of Attachment Welds.
Table HW-713 Firetube Extension Through Tubesheets for Welded Construction
133 HW-730.2 Stress Values for Weld Metal.
HW-730.3 Telltale Holes in Reinforcement Plates and Saddles.
HW-730.4 Stud Welds.
Figure HW-715.1 Heads Attached to Shells
134 HW-731 Minimum Requirements for Attachment Welds
HW-731.1 General.
HW-731.2 Necks Abutting the Boiler Shell.
HW-731.3 Inserted Nozzles Without Added Reinforcement Elements.
HW-731.4 Inserted Nozzles With Added Reinforcement.
HW-731.5 Nozzles With Integral Reinforcement.
HW-731.6 Fittings.
135 Figure HW-731 Some Acceptable Types of Welds for Fittings, Nozzles, and Other Connections to Shells, Drums, and Headers
137 HW-731.7 Fittings and Nozzles Not Exceeding NPS 3 (DN 75).
HW-731.8 Watertube Attachments.
HW-740 Resistance Welding in Carbon Steel for Other Than Butt-Welded Joints
Figure HW-740 Three-Ply Joint Assemblies
139 HW-745 Resistance Welding of Hydraulically Formed Panels
140 Figure HW-745 Two-Ply Joint Assemblies
142 Article 8 Fabrication Requirements
HW-800 Forming Plates
HW-801 Base Metal Preparation
HW-810 Assembly
HW-812 Alignment Tolerance
HW-813 Distortion
143 HW-820 Specific Welding Requirements
HW-820.1 Finished Longitudinal and Circumferential Joints.
HW-820.2 Fillet Welds.
HW-820.3 Double-Welded Butt Joints.
HW-820.4 Stud Welding.
HW-820.5 Procedure and Performance Qualification Tests and Material Requirements for Stud Welding.
HW-820.6 Stud Welding.
HW-820.7 ā€Š
HW-820.8 Welding (Brazing) by Non-Certificate Holders.
144 HW-820.9 Flash Welding.
HW-830 Repair of Weld Defects
HW-840 Posthydrotest Welding of Nonpressure Parts to Pressure Parts
145 Article 9 Inspection
HW-900 Inspection During Fabrication
HW-910 Check of Welding Procedure Qualifications
HW-911 Check of Welder and Welding Operator Performance Qualifications
146 Part HF ā€” Subpart HB Requirements for Boilers Fabricated by Brazing
Article 10 General Requirements
HB-1000 Scope
HB-1001 Responsibility of Manufacturer or Contractor
147 Article 11 Material Requirements
HB-1100 General
HB-1101 Combinations of Dissimilar Materials
HB-1102 Brazing Filler Metals
HB-1103 Fluxes and Atmospheres
148 Article 12 Brazing Processes, Procedures, and Qualifications
HB-1200 Brazing Processes
HB-1201 Joint Brazing Procedures
HB-1202 Brazing Qualifications and Records
HB-1202.1 Qualification of Brazing Procedures.
HB-1202.2 Qualification of Brazers and Brazing Operators.
HB-1202.3 No Production Work Without Qualifications.
HB-1202.4 Maintenance of Records of Qualifications and Identifying Marks.
149 Article 13 Design
HB-1300 Strength of Brazed Joints
HB-1301 Brazed Joint Efficiency Factors
HB-1302 Minimum Thickness
HB-1303 Permissible Service Temperature
HB-1304 Application of Brazing Filler Metal
HB-1305 Joint Clearance
150 HB-1306 Openings
HB-1307 Brazed Connections
Table HB-1305 Recommended Joint Clearances at Brazing Temperature
151 Article 14 Fabrication Requirements
HB-1400 Cleaning of Surfaces to Be Brazed
HB-1401 Postbrazing Operations
HB-1402 Repair of Defective Brazing
152 Article 15 Inspection and Marking
HB-1500 Inspection
HB-1501 Inspection of Brazing Procedure
HB-1502 Certification of Brazer and Brazing Operator
HB-1503 Visual Examination
HB-1510 Marking
153 Part HC Requirements for Boilers Constructed of Cast Iron
Article 1 General
HC-100 Scope
154 Article 2 Material Requirements
HC-200 General Material Requirements
HC-201 Manufacture
HC-202 Chemical Composition
HC-203 Tensile Strength Classification
HC-204 Test Bars
HC-205 Selection of Test Bar Size
HC-206 Molding and Pouring Test Bars
HC-207 Number of Tests
155 HC-208 Tension Test
HC-209 Tension Test Procedure
HC-210 Tension Retests
Figure HC-204.1 Dimensions of Tensile Test Specimen
156 HC-211 Transverse Test
HC-212 Transverse Test Procedure
HC-213 Transverse Retests
Figure HC-205.1 Cast Test Bars
157 HC-214 Workmanship, Finish, and Repair
HC-215 Examinations and Tests
Table HC-212 Correction Factors for Transverse Test Bars
Table HC-214 Pipe Plug Size for Minimum Wall Thickness
158 HC-216 Test Records
159 Article 3 Design
HC-300 Maximum Allowable Stress Values
HC-301 Basis for Establishing Stress Values in Table HC-300
HC-310 Heads
HC-310.1 Heads With Pressure on Concave Side.
HC-310.2 Heads With Pressure on Convex Side.
HC-311 Spherically Shaped Covers
Table HC-300 Maximum Allowable Stress Values in Tension for Cast Iron, ksi (MPa)
160 HC-311.1 Heads Concave to Pressure.
Figure HC-311 Spherically Shaped Covers With Bolting Flanges
161 HC-315 Openings and Reinforcements
HC-320 Corners and Fillets
HC-325 Washout Openings
162 HC-330 Assembly Method
163 Article 4 Tests
HC-400 Tests to Establish Design Pressure
HC-401 General
HC-401.1 Purpose for Which Tests May Be Used.
HC-401.2 Frequency of Tests.
HC-402 Bursting Test Procedure
HC-402.1 Test Gages.
HC-402.2 Associated Test Bars.
164 HC-403 Witnessing, Recording, and Certifying Tests
HC-404 Rating of Production Boilers Based on Tests
HC-410 Hydrostatic Test
HC-410.1 Steam Boilers.
HC-410.2 Hot Water Boilers.
HC-410.3 Required Test Pressure.
165 Article 5 Quality Control and Inspection
HC-501 General
HC-501.1 Quality Control System.
HC-502 Outline of Features to Be Included in the Written Description of the Quality Control System
HC-502.1 Product or Work Description.
HC-502.2 Authority and Responsibility.
HC-502.3 Organization.
HC-502.4 Drawings, Design Calculations, Test Results, and Specification Control.
HC-502.5 Material Control.
HC-502.6 Examination Program.
166 HC-502.7 Correction of Nonconformities.
HC-502.8 Calibration of Measurement and Test Equipment.
HC-502.9 Sample Forms.
HC-502.10 Retention of Records and Certifications.
HC-502.11 ASME Designee.
HC-502.12 Certified Individual (CI).
HC-510 Examination
167 HC-520 Certificates of Conformance
168 Part HA Requirements for Boilers Constructed of Cast Aluminum
Article 1 General
HA-100 Scope
169 Article 2 Material Requirements
HA-200 General Material Requirements
HA-201 Workmanship, Finish, and Repair
HA-202 Examinations and Tests
170 HA-203 Test Records
171 Article 3 Design
HA-300 Maximum Allowable Stress Values
HA-301 Heads and Spherically Shaped Covers
HA-302 Openings and Reinforcements
HA-303 Corners and Fillets
HA-304 Washout Openings
HA-305 Assembly Method
172 Article 4 Tests
HA-400 Tests to Establish Design Pressure
HA-401 General
HA-401.1 Purpose for Which Tests May Be Used.
HA-401.2 Frequency of Tests.
HA-402 Bursting Test Procedure
HA-403 Test Gages
173 HA-404 Witnessing, Recording, and Certifying Tests
HA-405 Rating of Production Boilers Based on Tests
HA-406 Hydrostatic Test
HA-406.1 Hot Water Boilers.
HA-406.2 Required Test Pressure.
HA-407 Pneumatic Tests
175 Article 5 Quality Control and Inspection
HA-501 General
HA-501.1 Quality Control System.
HA-502 Outline of Features to Be Included in the Written Description of the Quality Control System
HA-502.1 Product or Work Description.
HA-502.2 Authority and Responsibility.
HA-502.3 Organization.
HA-502.4 Drawings, Design Calculations, Test Results, and Specification Control.
HA-502.5 Material Control.
HA-502.6 Examination Program.
176 HA-502.7 Correction of Nonconformities.
HA-502.8 Calibration of Measurement and Test Equipment.
HA-502.9 Sample Forms.
HA-502.10 Retention of Records and Certifications.
HA-502.11 ASME Designee.
HA-502.12 Certified Individual (CI).
HA-503 Examination
177 HA-504 Certificates of Conformance
178 Part HLW Requirements for Potable-Water Heaters
Introduction
Article 1 ā€” General
Article 2 ā€” Materials
Article 3 ā€” Design
Article 4 ā€” Weldments
Article 5 ā€” Tests
179 Article 6 ā€” Inspection and Marking
Article 7 ā€” Controls
Article 8 ā€” Installation
180 Article 1 General
HLW-100 Scope
HLW-101 Service Limits
HLW-102 Permissible Marking
HLW-103 Units
182 Article 2 Material Requirements
HLW-200 Lining
183 HLW-201 Primary Pressure Parts Material
HLW-202 Acceptance of Unidentified or Small Quantities of Material
HLW-202.1 Plate.
HLW-202.2 Tubes, Pipe, Rods, Bars, and Shapes.
184 HLW-202.3 Marking and Test Report.
HLW-203 Miscellaneous Pressure Parts Material
HLW-204 Flanges and Pipe Fittings
HLW-205 Nonpressure Part Material
185 Article 3 Design
HLW-300 Design
HLW-301 Basis for Establishing Stress Values in Section II, Part D, Tables 6C and 6D
HLW-302 Minimum Thicknesses
Table HLW-300 Maximum Allowable Stress Values in Tension for Lined Water Heater Materials, ksi (MPa)
Table HLW-301 Maximum Allowable Stress Values in Tension for Unlined Water Heater Materials, ksi (MPa)
186 HLW-303 Shells Under Internal Pressure
HLW-305 Blank Unstayed Dished Heads, Pressure on Concave Side
HLW-305.1 General.
HLW-305.2 Ellipsoidal Heads.
HLW-305.3 Torispherical Heads.
HLW-305.4 Inside Crown Radius of Unstayed Heads.
HLW-305.5 Hemispherical Heads.
HLW-306 Blank Unstayed Dished Heads, Pressure on Convex Side
HLW-306.1 ā€Š
187 HLW-306.2 Hemispherical Heads.
HLW-307 Tubes
HLW-308 Openings
HLW-308.1 ā€Š
HLW-308.2 ā€Š
HLW-309 Tubes Attached by Rolling
HLW-310 Storage Tanks
HLW-310.1 Tank Construction.
HLW-310.2 Inspection Openings.
188 Article 4 Design of Weldments
HLW-400 Design of Welded Joints
HLW-401 General Requirements
HLW-401.1 Butt Joints.
HLW-401.2 Corner or Tee Joints.
HLW-401.3 Alignment Tolerance.
HLW-401.4 Distortion.
Figure HLW-401.1 Butt Welding of Plates of Unequal Thickness
189 HLW-402 Joint Efficiencies
Figure HLW-401.2 Typical Corner Joints
Table HLW-401.3-1 Alignment Tolerance
190 HLW-402.1 Joint Efficiencies for External Pressure Design.
HLW-411 Heads or Tubesheets Attached by Welding
HLW-411.1
HLW-411.2
HLW-413 Tubes Attached by Welding
HLW-415 Head-to-Shell Attachments
HLW-420 Openings in Welds
HLW-430 Welded Connections
HLW-430.1 Strength of Attachment Welds.
191 Figure HLW-411 Typical Water Heater Welded Joints
193 Figure HLW-413 Tubes Attached by Welding
194 Figure HLW-415 Heads Attached to Shells
195 HLW-430.2 Stress Values for Weld Metal.
HLW-431 Minimum Requirements for Attachment Welds
HLW-431.1 General.
HLW-431.2 Inserted Nozzles Without Added Reinforcement Elements.
HLW-431.3 Inserted Nozzles With Added Reinforcement.
HLW-431.4 Nozzles With Integral Reinforcement.
HLW-431.5 Fittings With Internal Threads and Studded Pads.
196 Figure HLW-431.1 Some Acceptable Types of Welds for Fittings, Nozzles, and Other Connections to Shells and Head
197 Figure HLW-431.5 Some Acceptable Types of Welds for Fittings, Nozzles, and Other Connections to Shells and Head
198 HLW-431.6 Fittings Attached by Resistance Welding.
HLW-431.7 Stud Welds for Covers.
HLW-431.8 Stud Welds for Internally Threaded Fittings.
199 HLW-431.9 Friction Welding.
HLW-432 Brazed Connections for Copper Lined Vessels
HLW-440 Welding Processes
HLW-450 Welding Qualifications
HLW-451 Production Work Qualifications
HLW-452 Interchange of Qualifying Tests Among Manufacturers Prohibited
HLW-453 Maintenance of Records of Qualifications and Identifying Marks
200 Figure HLW-432.1 Some Acceptable Types of Brazed Fittings, Nozzles, and Other Connections to Copper-Lined Shells and Heads
201 HLW-454 Posthydrotest Welding of Nonpressure Parts to Pressure Parts
HLW-460 Specific Welding Requirements
HLW-460.1 Finished Longitudinal and Circumferential Joints.
HLW-460.2 Fillet Welds.
HLW-460.3 Double-Welded Butt Joints.
HLW-460.4 Repair of Weld Defects.
HLW-460.5 Stud Welding.
HLW-460.6 Procedure and Performance Qualification Tests and Material Requirements for Stud Welding.
HLW-460.7 Stud Welding.
202 HLW-460.8 Tack Welds.
HLW-460.9 Friction Welding.
203 Article 5 Tests
HLW-500 Tests to Establish Maximum Allowable Working Pressure and Production Line Tests
HLW-501 General
HLW-502 Proof Test
HLW-502.1 Test Procedure.
204 HLW-502.2 Test Gages.
HLW-503 Testing of Parts
HLW-503.1
HLW-503.2
HLW-504 Witnessing, Recording, and Certifying Tests
HLW-505 Hydrostatic Test
HLW-505.1
HLW-505.2
205 Article 6 Inspection and Marking
HLW-600 Inspection and Certification
HLW-600.1 Inspection by Authorized Inspector.
HLW-600.2 Manufacturerā€™s Responsibility.
HLW-600.3 Authorized Inspectorā€™s Duty.
HLW-601 Manufacturerā€™s Data and Partial Data Reports
HLW-601.1 Manufacturerā€™s Data Report.
206 HLW-601.2 Partial Data Reports.
HLW-601.3 Supplementary Sheet.
HLW-601.4 Multiple Page Data Reports.
HLW-602 Marking of Water Heaters and Storage Tanks
HLW-602.1 Marking Requirements for Vessels.
HLW-602.2 Marking a Proof-Tested Vessel.
HLW-602.3 ā€Š
Figure HLW-602.1 Official Symbol to Denote The American Society of Mechanical Engineersā€™ Standard
207 HLW-602.4 ā€Šā€Š
Figure HLW-602.2 Form of Marking on Completed Water Heaters
208 Article 7 Controls
HLW-700 Controls
HLW-701 Temperature Control
HLW-701.1
HLW-702 Limit Controls
HLW-703 Controls and Heat Generating Apparatus
HLW-704 Electrical Wiring
HLW-704.1 Electrical Code Compliance.
209 Article 8 Installation Requirements
HLW-800 Pressure Relief Valves
HLW-800.1 Pressure Relief Valve Requirements for Water Heaters.
HLW-801 Mounting Pressure Relief Valves
HLW-801.1 Installation.
HLW-801.2 Permissible Mountings.
HLW-801.3 Requirements for Common Connection for Two or More Valves.
HLW-801.4 Threaded Connections.
210 HLW-801.5 Prohibited Mountings.
HLW-801.6 Use of Shutoff Valves Prohibited.
HLW-801.7 Pressure Relief Valve Discharge Piping.
HLW-805 Water Supply
HLW-805.1 Connections.
HLW-805.2 Pressure.
HLW-805.3 Stop Valves.
HLW-809 Provisions for Thermal Expansion in Hot Water Systems
HLW-809.1 Expansion Tank.
HLW-809.2 Piping.
HLW-810 Bottom Drain Valve
211 HLW-820 Thermometer
Figure HLW-809.1 A Typical Acceptable Piping Installation for Storage Water Heaters in Battery
212 Table HLW-809.1 Expansion Tank Capacities for a Water Heater
213 Figure HLW-809.2 A Typical Acceptable Piping Installation for Flow Through Water Heater With Provisions for Piping Expansion
214 Article 9 Modular Water Heater Requirements
HLW-900 General
HLW-901 Marking
HLW-902 Manufacturerā€™s Data Reports
HLW-903 Pressure Relief Valves
HLW-904 Stop Valves
HLW-905 Supply and Return Headers
HLW-906 Bottom Drain Valve
HLW-907 Thermometers
215 MANDATORY APPENDICES
Mandatory Appendix 2 Codes, Standards, and Specifications Referenced in Text
2-100 Reference Standards
2-200 Organizations
216 Table 2-100 Codes, Standards, and Specifications Referenced in Text
217 Mandatory Appendix 3 Adhesive Attachment of Nameplates to Casing
3-100 Scope
3-101 Nameplate Application Procedure Qualification
218 Mandatory Appendix 4 Guide to Manufacturerā€™s Data Report Forms
4-100 Introduction
4-200 Data Report Forms
4-300 Certificates of Conformance
219 Table 4-1 Guide for the Preparation of Section IV Manufacturerā€™s Data Report Forms
222 Forms
FORM H-2 MANUFACTURERā€™S DATA REPORT FOR ALL TYPES OF BOILERS EXCEPT WATERTUBE AND THOSE MADE OF CAST IRON
224 FORM H-3 MANUFACTURERā€™S DATA REPORT FOR WATERTUBE BOILERS AND ECONOMIZERS
226 FORM H-4 MANUFACTURERā€™S PARTIAL DATA REPORT
228 FORM H-5 MANUFACTURERā€™S MASTER DATA REPORT FOR BOILERS CONSTRUCTED FROM CAST IRON
230 FORM H-5A MANUFACTURERā€™S MASTER DATA REPORT FOR BOILERS CONSTRUCTED FROM CAST ALUMINUM
232 FORM H-6 MANUFACTURERā€™S DATA REPORT SUPPLEMENTARY SHEET
233 FORM HC-1 MANUFACTURERā€™S MATERIAL CERTIFICATE OF CONFORMANCE FOR CAST IRON BOILER SECTIONS
234 FORM HC-2 MANUFACTURERā€™S MATERIAL CERTIFICATE OF CONFORMANCE FOR HYDROSTATIC TESTING OF CAST IRON BOILER SECTIONS
235 FORM HC-3 MANUFACTURERā€™S REPORT FOR THE APPLICATION OF NAMEPLATES ON CAST IRON BOILERS
236 FORM HA-1 MANUFACTURERā€™S MATERIAL CERTIFICATE OF CONFORMANCE FOR CAST ALUMINUM BOILER SECTIONS
237 FORM HA-2 MANUFACTURERā€™S MATERIAL CERTIFICATE OF CONFORMANCE FOR HYDROSTATIC AND PNEUMATIC TESTING OF CAST ALUMINUM BOILER SECTIONS
238 FORM HA-3 MANUFACTURERā€™S REPORT FOR THE APPLICATION OF NAMEPLATES ON CAST ALUMINUM BOILERS
239 FORM HLW-6 MANUFACTURERā€™S DATA REPORT FOR WATER HEATERS OR STORAGE TANKS
241 FORM HLW-7 MANUFACTURERā€™S PARTIAL DATA REPORT FOR WATER HEATERS AND STORAGE TANKS
243 FORM HLW-8 MANUFACTURERā€™S MASTER DATA PROOF TEST REPORT FOR WATER HEATERS OR STORAGE TANKS
244 Mandatory Appendix 5 Vacuum Boilers
5-100 Scope
5-200 Maximum Pressure and Temperature
5-300 Design Parameters
5-400 Welding
5-500 Alternative to Hydrotest
245 5-600 Instruments, Fittings, and Controls
5-700 Inspection Openings
246 Table 6-1 Standard Units for Use in Equations
Mandatory Appendix 6 Standard Units for Use in Equations
247 Mandatory Appendix 7 Rules for Mass-Production of Heating Boilers
7-100 Introduction
7-200 Scope
7-300 General
7-400 Quality Control Procedures
248 7-500 Data Reports
250 Mandatory Appendix 8 Criteria for Reapplication of a Certification Mark
8-100 Introduction
8-200 Conditions
8-300 Rules
251 FORM 8-1 CERTIFICATE OF CONFORMANCE FOR REAPPLICATION OF THE CERTIFICATION MARK
252 Table 8-200-1 Guide for Completing the Certificate of Conformance for Reapplication of the Certification Mark
253 Mandatory Appendix 9 Establishing Governing Code Editions, Addenda, and Cases for Heating Boilers and Replacement Parts
9-100 General
9-200 Design
9-300 Materials
9-400 Fabrication
9-500 Examination
9-600 Inspection
254 9-700 Testing
9-800 Overpressure Protection
9-900 Field Assembly
9-1000 Certification
255 Mandatory Appendix 10 Requirements for Feedwater Economizers
10-100 General
10-200 Design
10-300 Pressure Relief
256 Table A-100 Guide for Estimating Steaming Capacity Based on Heating Surface
NONMANDATORY APPENDICES
Nonmandatory Appendix A Estimating Pressure Relief Valve Capacity Requirements
A-100 Guide for Estimating Pressure Relief Valve Capacity Based on Heating Surface
257 Nonmandatory Appendix B Method of Checking Pressure Relief Valve Capacity by Measuring Maximum Amount of Fuel That Can Be Burned
B-100 Procedure
B-101 Examples
258 B-102 Heats of Combustion of Fuels
259 Nonmandatory Appendix C Examples of Method of Calculating a Welded Ring Reinforced Furnace
C-100 For a Steam or Hot Water Boiler
260 C-101 For a Hot Water Boiler
261 Figure D-100 Computation of Typical Pad Reinforcement
Nonmandatory Appendix D Examples of Methods of Computation of Openings in Boiler Shells
D-100 Pad Reinforced Opening
262 Figure D-101 Computation of a Typical Nozzle Fitting
D-101 Nozzle Reinforced Opening
264 Nonmandatory Appendix E Terminology
E-100 Terms Relating to Design
265 E-101 Terms Relating to Welding
268 Nonmandatory Appendix F Quality Control System
F-100 General
F-202 Outline of Features to Be Included in the Written Description of the Quality Control System
270 Nonmandatory Appendix H List of Abbreviations and Addresses
271 Nonmandatory Appendix K Guide to Information Appearing on Certificate of Authorization
273 Figure K-1 Sample Certificate of Authorization
274 Nonmandatory Appendix M Guidance for the Use of U.S. Customary and SI Units in the ASME Boiler and Pressure Vessel Code
M-100 Use of Units in Equations
M-200 Guidelines Used to Develop SI Equivalents
276 M-300 Soft Conversion Factors
277 Nonmandatory Appendix N Guide to Manufacturerā€™s Certificate of Conformance for Pressure Relief Valves
278 Nonmandatory Appendix P Guide to the Relocation of Overpressure Protection Requirements
P-100 General
279 Table P-100-1 Cross-Reference List
281 ENDNOTES

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