273-01 Boiler Tube Repair

When you complete this lesson, you will be able to describe different types of tube assemblies which may need repair in a boiler. You will be able to list common causes of these leaks and procedures for repairing the tube and tube assemblies.

• Describe different types of boiler tube assemblies
• List causes of tube leaks and ruptures
• Explain the procedure for repairing a ruptured tube by closing
• Explain the procedure for cladding or shielding a damaged boiler tube
• Explain the procedure for replacing a damaged section of a tube or tube assembly
• Explain the procedure for repairing a boiler tube using replacement window

273-02 Inspecting the Fireside of a Boiler, Part 1

When you complete this lesson, you will be able to explain some specific items to look for when doing a fireside inspection on the watertubes of a large watertube boiler.

• Describe how to inspect the fireside of the boiler waterwalls for support failures
• Describe how to inspect the fireside of the boiler waterwalls for refractory failures and clinker damage
• Describe how to inspect the fireside of the boiler waterwalls for tube erosion and corrosion
• Describe how to inspect the fireside of the boiler waterwalls for tube overheating
• Describe how to inspect the fireside of the boiler waterwalls for ash accumulations
• Describe how to inspect the fireside of the boiler waterwalls for weld failures
• Describe how to inspect the burner openings, air ports, and inspection doors on the fireside of the boiler
• Describe some ways used to determine tube thickness on the waterwalls of a boiler

273-03 Inspecting the Fireside of a Boiler, Part 2

When you complete this lesson, you will be able to explain some specific things to look for when doing a fireside inspection on the superheaters, reheaters, economizers, ash hoppers, baffles, sootblowers, and the boiler bottom seal on the fireside of a large watertube boiler.

• Describe how to inspect the fireside of a superheater in a large watertube boiler
• Describe how to inspect the fireside of a reheater in a large watertube boiler
• Describe how to inspect a bottom ash hopper in a large watertube boiler
• Describe how to inspect the fireside of an economizer in a large watertube boiler
• Describe how to inspect baffles on the fireside of a large watertube boiler
• Describe how to inspect the boiler bottom seal in a large watertube boiler

273-04 Inspecting the Waterside of a Boiler

When you complete this lesson, you will be able to explain some specific things to look for when doing a waterside inspection on steam drums, moisture separators, headers, and tubes of a large watertube boiler.

• Describe how to inspect the waterside of the steam drum and moisture separators of a large watertube boiler
• Describe how to inspect the waterside of the headers and tubes of a large watertube boiler

273-05 Inspecting a Boiler’s Exterior

When you complete this lesson, you will be able to describe some specific areas to look at, and what to look for when inspecting the exterior of a large watertube boiler.

• Describe inspection techniques for the boiler casing
• Describe inspection techniques for the steam drum
• Describe inspection techniques for safety valves
• Describe inspection techniques for downcomers and pumps
• Describe inspection techniques around casing stiffeners and intrusions

273-06 Waterside and Fireside Cleaning of Boiler

When you complete this lesson, you will be able to explain some methods and procedures for cleaning and testing the waterside and fireside of a large watertube boiler.

• Recall how to perform a chemical cleaning procedure to clean the waterside of a large watertube boiler
• Recall how to use a hydrostatic testing procedure to test for leaks in a large watertube boiler
• Recall how to use a compressed air testing procedure to test for leaks in a large watertube boiler
• Define what a fireside cleaning of a large watertube boiler entails
• Recall how to close a boiler after fireside cleaning
• Recall how to pressurize a boiler and check for leaks after a fireside cleaning