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eLibrary > ASME BPVC - VII -2021 BPVC Section VII, Recommended Guidelines for the Care of Power Boilers >

ASME BPVC - VII -2021 BPVC Section VII, Recommended Guidelines for the Care of Power Boilers, 2021

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ASME BPVC - VII -2021 BPVC Section VII, Recommended Guidelines for the Care of Power Boilers, 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
ORGANIZATION OF SECTION VII
SUMMARY OF CHANGES
LIST OF CHANGES IN RECORD NUMBER ORDER
CROSS-REFERENCING AND STYLISTIC CHANGES IN THE BOILER AND PRESSURE VESSEL CODE
Subsection 1 Watertube Drum-Type Industrial Steam Boilers
ARTICLE 100 FUNDAMENTALS OF WATERTUBE BOILERS [Go to Page]
100.1 STEAM GENERATION
100.2 WATERTUBE BOILERS [Go to Page]
100.2.1 Watertube Boilers.
100.2.2 Shop-Assembled (Package) Boilers.
100.2.3 Field-Assembled Boilers.
100.3 STEAM DRUMS
100.4 ECONOMIZERS
100.5 SUPERHEATERS
100.6 COMBUSTION
100.7 BOILER EFFICIENCY AND AIR EMISSIONS
ARTICLE 101 BOILER OPERATION [Go to Page]
101.1 GENERAL GUIDELINES [Go to Page]
101.1.1 Personnel Training.
101.1.2 Preventing Explosions.
101.1.3 Maintaining Proper Water Level.
101.1.4 Maintaining Proper Furnace Pressure.
101.1.5 Maintaining Clearance for Expansion.
101.1.6 Reference Sources.
101.2 PREPARING FOR OPERATION [Go to Page]
101.2.1 Inspection.
101.2.2 Chemical Cleaning.
101.2.3 Safety Checklist for Boiler Examination.
101.2.4 Water-Side Checklist.
101.2.5 Fire-Side Checklist.
101.2.6 External Checklist.
101.2.7 Pressure Testing.
101.3 STARTING UP [Go to Page]
101.3.1 General.
101.3.2 Establish Water Level.
101.3.3 Light-Off.
101.3.4 Going Online.
101.4 ONLINE OPERATION [Go to Page]
101.4.1 Operating Data.
101.4.2 Water-Side Operations.
101.4.3 Pressure Relief Valves.
101.4.4 Leaks.
101.4.5 Soot Blowing.
101.5 OUT-OF-SERVICE OPERATION [Go to Page]
101.5.1 General.
101.5.2 Shutdown.
101.5.3 Draining.
101.5.4 Isolation and Preparation.
101.5.5 Waterside Cleaning.
101.5.6 Fireside Cleaning.
101.5.7 Storage.
ARTICLE 102 BOILER AUXILIARIES [Go to Page]
102.1 PREPARATION OF AUXILIARIES FOR SERVICE
102.2 FUEL-BURNING EQUIPMENT [Go to Page]
102.2.1 General.
102.2.2 Preparation for Operation.
102.2.3 Ignitors.
102.2.4 Gas Systems.
102.2.5 Oil Systems.
102.2.6 Response to Tube Failure.
102.3 AIR HEATERS [Go to Page]
102.3.1 Preparation for Placing in Service.
102.3.2 Placing in Service.
102.3.3 Normal Operation.
102.3.4 Emergency Operation Due to Fire.
102.4 BOILER FEED PUMPS [Go to Page]
102.4.1 Preparation for Service.
102.4.2 Placing in Service.
102.4.3 Normal Operation.
102.5 AUXILIARY DRIVES [Go to Page]
102.5.1 Motor Start-Up and Operation Checks.
102.5.2 Mechanical Drive Turbine Start-Up and Operation Checks.
102.6 Draft Fans [Go to Page]
102.6.1 Preparation for Service.
102.6.2 Placing in Service.
102.6.3 Normal Operation.
102.6.4 Emergency Operation.
102.7 Dampers
ARTICLE 103 APPURTENANCES [Go to Page]
103.1 BOILER PRESSURE RELIEF VALVES [Go to Page]
103.1.1 General.
103.1.2 Pressure Relief Valve Maintenance.
103.1.3 Pressure Relief Valve Testing.
103.2 PRESSURE RELIEF VALVES FOR ECONOMIZERS AND AUXILIARIES [Go to Page]
103.2.1 General.
103.2.2 Examination and Maintenance.
103.2.3 Repair and Testing.
103.2.4 Organic Fluid Vaporizers.
103.3 TRANSPORTATION AND INSTALLATION OF PRESSURE RELIEF VALVES
103.4 WATER COLUMNS, GAGE GLASSES, AND LEVEL TRANSMITTERS [Go to Page]
103.4.1 Proper Blowdown Procedure.
103.4.2 Proper Valve Types.
103.4.3 Proper and Complete Heat Insulation.
103.4.4 Leakage Correction.
103.5 BOILER BLOWDOWN
103.6 PRESSURE GAGES
103.7 FEEDWATER REGULATOR VALVE
103.8 SOOT BLOWERS
103.9 FUSIBLE PLUGS
ARTICLE 104 INSTRUMENTATION, CONTROLS, AND INTERLOCKS [Go to Page]
104.1 GENERAL
104.2 INDICATORS AND RECORDERS [Go to Page]
104.2.1 Indicating Devices.
104.2.2 Recording Devices.
104.2.3 Preparation for and Placing in Service.
104.2.4 Checking and Testing.
104.3 WATER-LEVEL INDICATION
104.4 CONTROLS AND INTERLOCKS [Go to Page]
104.4.1 Controls.
104.4.2 Interlocks.
104.4.3 Safety Controls.
104.4.4 Preparation for and Placing in Service.
104.4.5 Checking and Testing.
ARTICLE 105 EXAMINATIONS [Go to Page]
105.1 SCOPE
105.2 INSPECTION AND EXAMINATION FREQUENCY
105.3 PREPARATION FOR INSPECTION OR EXAMINATION [Go to Page]
105.3.1 General.
105.3.2 External Surfaces and Parts.
105.4 EXAMINATION OF INTERNAL SURFACES OF BOILERS AND APPURTENANCES [Go to Page]
105.4.1 All Boilers.
105.4.2 Watertube Boilers.
105.5 EXAMINATION OF EXTERNAL SURFACES OF BOILERS, APPURTENANCES, AND AUXILIARIES [Go to Page]
105.5.1 General.
105.5.2 Piping.
105.5.3 Pressure Relief Valves.
105.5.4 Other Boiler-Related Items.
105.6 CARE AND MAINTENANCE [Go to Page]
105.6.1 Housekeeping.
105.6.2 Certificates and Licenses.
105.6.3 Record Keeping and Logs.
105.7 REPAIRS
105.8 PRESSURE TESTS
105.9 GENERAL LISTING OF EXAMINATIONS [Go to Page]
105.9.1 All Examinations.
105.9.2 Internal Examinations.
105.10 INSPECTOR
105.11 POM OUTAGE EXAMINATIONS AND OPERATIONAL WALKDOWNS
ARTICLE 106 REPAIRS, ALTERATIONS, AND MAINTENANCE [Go to Page]
106.1 REPAIRS AND ALTERATIONS
106.2 MAINTENANCE [Go to Page]
106.2.1 General.
106.2.2 Information to Assist in Maintenance.
106.2.3 Maintenance Checks.
106.2.4 Operating Checks Relating to Maintenance.
106.3 BOILER MAINTENANCE PROGRAMS [Go to Page]
106.3.1 Examination and Overhaul Procedures.
106.3.2 Maintenance and Overhaul Scheduling.
106.3.3 Equipment Histories and Spare Parts Inventories.
106.3.4 Personnel Training.
106.3.5 Equipment Improvement.
106.4 MAINTENANCE CHECKS FOR STEAM BOILERS [Go to Page]
106.4.1 Watertube Boilers.
106.5 CHECKLISTS TO ASSIST IN MAINTENANCE
Subsection 2 Pertaining to All Steam Boilers
ARTICLE 200 PROTECTING HEAT TRANSFER SURFACES [Go to Page]
200.1 GENERAL
200.2 INTERNAL CLEANING OF BOILERS
200.3 LAYING UP OF BOILERS [Go to Page]
200.3.1 Water Side.
200.3.2 Dry Storage.
200.3.3 Wet Storage.
200.3.4 Fire Side.
200.4 DEPOSITS [Go to Page]
200.4.1 Scale.
200.4.2 Sludge.
200.4.3 Internal Deposit Monitoring.
200.5 INTERNAL CORROSION [Go to Page]
200.5.1 General.
200.5.2 Oxygen Corrosion.
200.5.3 Caustic Corrosion.
200.5.4 Chelate Corrosion.
200.5.5 Acid Corrosion.
200.5.6 Auxiliary Equipment Corrosion.
200.5.7 Examinations.
200.6 CORROSION CRACKING OF BOILER STEEL
200.7 STEAM CONTAMINATION [Go to Page]
200.7.1 General.
200.7.2 Control of Steam Contamination.
200.8 SAMPLING, TESTING, CONTROLLING, AND REPORTING OF ANALYSES OF WATER [Go to Page]
200.8.1 Sampling.
200.8.2 Testing.
200.9 Fire-Side Conditions [Go to Page]
200.9.1 General.
200.9.2 Soot.
200.9.3 Slag.
200.9.4 Corrosion.
ARTICLE 201 PREVENTING BOILER FAILURES [Go to Page]
201.1 GENERAL
201.2 OVERPRESSURE [Go to Page]
201.2.1 Indicators — Steam Pressure Gages.
201.2.2 Pressure Relief Valves.
201.2.3 Relief Equipment — Fusible Plugs.
201.3 HIGH OR LOW WATER LEVEL [Go to Page]
201.3.1 Indicators — Gage Glasses.
201.3.2 Indicators — Automatic High- and Low-Water-Level Alarms.
201.3.3 Automatic Trip.
201.4 WEAKENING OF STRUCTURE [Go to Page]
201.4.1 Boiler Start-Up.
201.4.2 Control of Water Level.
201.4.3 Erosion.
201.4.4 Internal Corrosion.
201.4.5 External Corrosion.
201.4.6 Boiler Shutdown.
201.4.7 Boiler Out of Service.
201.4.8 Failure of Supports.
201.4.9 Mechanical Damage.
201.5 OPERATION OF COMBUSTION EQUIPMENT
201.6 FURNACE EXPLOSIONS
201.7 FURNACE IMPLOSIONS
ARTICLE 202 DOCUMENTS, RECORDS, AND REFERENCES [Go to Page]
202.1 CODE DOCUMENTATION
202.2 REFERENCED DOCUMENTS
202.3 RECORD DRAWINGS AND DOCUMENTATION
202.4 REFERENCES [Go to Page]
202.4.1 Published Documents Referenced in This Code.
202.4.2 Other Documents Relating to Boilers.
Subsection 3 Other Boiler Types
ARTICLE 300 FIRETUBE BOILERS [Go to Page]
300.1 GENERAL
300.2 OUT-OF-SERVICE OPERATION [Go to Page]
300.2.1 Isolation.
300.2.2 Water-Side Cleaning.
300.3 INTERNAL EXAMINATIONS [Go to Page]
300.3.1 Stays and Braces.
300.3.2 Tube Defects.
300.3.3 Ligaments Between Tube Holes.
300.3.4 Manholes and Other Openings.
300.3.5 Fire Surfaces.
300.4 EXTERNAL EXAMINATION
300.5 MAINTENANCE [Go to Page]
300.5.1 General.
300.5.2 Maintenance Checks.
300.5.3 Operating Checks Relating to Maintenance.
300.5.4 Checklist to Assist in Maintenance.
ARTICLE 301 ELECTRIC STEAM BOILERS [Go to Page]
301.1 TYPES AND FEATURES
301.2 RESISTANCE-ELEMENT ELECTRIC BOILERS [Go to Page]
301.2.1 Water Quality and Treatment for Resistance-Element Electric Boilers.
301.2.2 General Care and Maintenance of Resistance-Element Electric Boilers.
301.3 ELECTRODE STEAM BOILERS [Go to Page]
301.3.1 Basic Electrode Steam Boilers.
301.3.2 Commonly Used Electrode Steam Boiler Designs.
301.3.3 Jet-Spray Electrode Steam Boiler Designs.
301.3.4 Water Quality and Treatment for Electrode Steam Boilers.
301.3.5 Electrical System Requirements for Electrode Steam Boilers.
301.3.6 Maintenance Requirements for Electrode System Boilers.
ARTICLE 302 UTILITY BOILERS [Go to Page]
302.1 START-UP [Go to Page]
302.1.1 Establish Water Level.
302.1.2 Direct Spring-Loaded Pressure Relief Valves.
Subsection 4 Coal-Fired and Other Solid-Fuel-Fired Boilers
ARTICLE 400 STOKER-FIRED BOILERS [Go to Page]
400.1 GENERAL
400.2 PREPARATION FOR SERVICE
400.3 STOKER FIRING
400.4 SHUTTING DOWN
400.5 HIGH WATER LEVEL IN STOKER-FIRED BOILERS
400.6 BOILER TUBE FAILURE ON STOKER-FIRED UNITS
ARTICLE 401 PULVERIZED-COAL-FIRED BOILERS [Go to Page]
401.1 GENERAL
401.2 PREPARATION FOR SERVICE
401.3 MAINTAINING PROPER FURNACE PRESSURE
401.4 PULVERIZED-COAL FIRING
401.5 SHUTTING DOWN
401.6 FIRE IN NONOPERATING PULVERIZERS
401.7 FIRE IN OPERATING PULVERIZERS
401.8 FIRE IN PULVERIZED-FUEL SYSTEMS
401.9 INSTRUMENTATION, CONTROLS, AND INTERLOCKS FOR PULVERIZED-FUEL OPERATION
401.10 CYCLONE FURNACES
ARTICLE 402 ASH REMOVAL [Go to Page]
402.1 GENERAL
402.2 BOTTOM ASH — WET REMOVAL
402.3 BOTTOM ASH — DRY REMOVAL
402.4 FLY ASH REMOVAL
402.5 FIRE-SIDE CLEANING
ARTICLE 403 MAINTENANCE [Go to Page]
403.1 MAINTENANCE CHECKS — STOKERS [Go to Page]
403.1.1 Underfeed Stoker.
403.1.2 Spreader Stoker.
403.1.3 Dump Grates.
403.1.4 Traveling Grates.
403.2 MAINTENANCE CHECKS — PULVERIZED-COAL FIRING [Go to Page]
403.2.1 Feeder.
403.2.2 Pulverizer.
403.2.3 Exhauster.
403.2.4 Burner.
403.3 MAINTENANCE CHECKS — ASH REMOVAL SYSTEM
Subsection 5 Glossary
Figures [Go to Page]
Figure 100.2.1-1 Watertube Boiler
Figure 100.2.2-1 Package Boiler
Figure 100.3-1 Simple Steam Drum
Figure 100.3-2 Steam Drum With Internals — Baffle Type
Figure 100.3-3 Steam Drum With Internals — Cyclone Separator Type
Figure 100.4-1 Typical Economizer
Figure 101.5.4-1 Typical Valve Lineup Prior to Out-of-Service Operation
Figure 102.2.3-1 Simplified Pilot Gas Piping Arrangement
Figure 102.2.5.2-1 Simplified Fuel Oil Train — Single Burner With Oil Heating
Figure 102.2.5.2-2 Simplified Light Fuel Oil Train — Multiple Burner
Figure 102.3.1-1 Typical Tubular Air Heater
Figure 102.3.1-2 Typical Regenerative Air Heater
Figure 102.3.1-3 Details of Regenerative Air Heater, Bisector Type
Figure 102.4.2-1 Typical Centrifugal Boiler Feed Pump, Water Connections
Figure 102.5-1 Typical Motor Drive
Figure 102.5-2 Typical Single-Stage Turbine Drive
Figure 102.5-3 Typical Turbine Drive Arrangement
Figure 102.6.1-1 Airfoil Blade Centrifugal Fan With Inlet Vane Control
Figure 102.7-1 Typical Outlet Fan Dampers (Multilouver)
Figure 103.1.2.9-1 Typical Direct Spring-Loaded Safety Valve
Figure 103.1.2.9-2 Recommended Direct Spring-Loaded Safety Valve Installation
Figure 103.1.3-1 Application of Test Gag
Figure 103.1.3-2 Hydraulic Lift Assist Device
Figure 103.4-1 Typical Installation of a Boiler Water-Level Gage
Figure 103.4.1-1 Gage Glass and Water Column Blowdown Procedure
Figure 103.4.2-1 Y‐Type Globe Valve
Figure 105.4.1.2-1 Typical Forms of Fusible Plugs
Figure 200.4.1-1 Scale Causing Overheating and Tube Failure
Figure 200.4.1-2 Deposit Effect on Boiler Tube Versus Tube Temperature
Figure 200.5.2-1 Oxygen Corrosion in an Economizer Tube
Figure 200.5.3-1 Caustic Gouge-Type Attack on Boiler Tube
Figure 200.5.4-1 Chelate Attack Caused by Excessive Feed of Chemical
Figure 200.5.6-1 CO2 Carbonic Acid Attack on Condensate Pipe
Figure 200.5.6-2 Oxygen Attack on Condensate Pipe
Figure 200.6.6-1 H+ Damage on Boiler Tube
Figure 300.3.1-1 Typical Stays
Figure 301.2-1 Typical Electric Steam Boiler With Resistance Elements
Figure 301.2-2 Typical Electric Steam Boiler With Electronic Water-Level Controls
Figure 301.2-3 Typical Large Industrial 300-kW Electric Steam Boiler With Resistance Elements Mounted Horizontally
Figure 301.3.1-1 Electrode Steam Boiler
Figure 301.3.3-1 Basic Electrode Steam Boiler With Jet Spray and Mechanical Control Shield
Figure 301.3.3-2 Electrode Steam Boiler With Jet Spray and Variable-Speed Pump Control
Figure 400.1-1 Typical Underfeed Stoker
Figure 400.1-2 Feeder–Distributor for Firing of Coal on a Spreader Stoker
Figure 400.1-3 Spreader Stoker, Continuous Ash Discharge Grate
Figure 401.2-1 Typical Bowl Mill
Figure 401.2-2 Typical Attrition Mill
Figure 401.2-3 Arrangement of Ball-Tube Mill
Figure 401.4-1 Burner for Horizontal Firing of Coal
Tables [Go to Page]
Table 200.8.1-1 Methods for Sampling of Water and Steam
Table 200.8.2-1 Methods of Analysis for the Control of Water for Boilers
Table 200.8.2-2 Useful Tests for the Control of Water for Boilers
Table I-100-1 Standard Units for Use in Equations
Forms [Go to Page]
Form A-101-1 Watertube Boilers — Maintenance Checks
Form A-102-1 Watertube Boilers — Operating Checks Relating to Maintenance
Form A-103-1 Firetube Boilers — Maintenance Checks
Form A-104-1 Firetube Boilers — Operating Checks Relating to Maintenance
Mandatory Appendix I Standard Units for Use in Equations
Nonmandatory Appendix A Checklists for Maintenance Examinations [Go to Page]
ARTICLE A-100 PROCEDURES FOR CARE AND MAINTENANCE OF PACKAGE BOILERS [Go to Page]
A-100.1 CLEANING OF PARTS AND STRAINERS
A-100.2 CARE OF MOTORS AND ELECTRICAL EQUIPMENT
A-100.3 DRYING OF PARTS AFTER WATER IMMERSION
A-100.4 PERMANENT OR SEASONAL SHUTDOWN
ARTICLE A-101 MAINTENANCE CHECKS FOR GAS-, OIL-, AND SOLID-FUEL-FIRED WATERTUBE BOILERS
ARTICLE A-102 OPERATING CHECKS RELATING TO MAINTENANCE FOR GAS-, OIL-, OR SOLID-FUEL-FIRED WATERTUBE BOILERS
ARTICLE A-103 MAINTENANCE CHECKS FOR FIRETUBE BOILERS
ARTICLE A-104 OPERATING CHECKS RELATING TO MAINTENANCE FOR FIRETUBE BOILERS
Nonmandatory Appendix B Guidance for the Use of U.S. Customary and SI Units in the ASME Boiler and Pressure Vessel Code [Go to Page]
B-100 USE OF UNITS IN EQUATIONS
B-200 GUIDELINES USED TO DEVELOP SI EQUIVALENTS
B-300 SOFT CONVERSION FACTORS [Go to Page]

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