54 Questions
EASY What are the two main parts of an internal inspection?
Waterside and fireside
Before starting the waterside inspection, what must be done to the boiler?
Shut down, isolated, and locked out
What is examined during the waterside inspection?
All of the above and more
Why are pressure parts cleaned internally?
To provide a clean metal surface for further inspection
What is analyzed in a detailed inspection report?
Both deposit thickness and composition
During the waterside inspection, what is the inspector looking for?
Signs of corrosion, pitting, and cracking
What must be removed to allow inspection for scale or other deposits?
The plugs in the water column, feeder, and low water cut-off connection piping connections
What may be done after the waterside inspection is completed?
The boiler is closed up and a hydrostatic test is carried out
Why would an inspector request the removal of refractory or insulation during a fireside inspection?
To inspect tube or drum surfaces
What is the purpose of a hydrostatic test on a boiler?
To find small leaks or cracks in the boiler
What should the temperature of the water be during a hydrostatic test?
Between 20°C and 50°C
Why must all air be vented from the boiler during a hydrostatic test?
To prevent the air from being compressed and causing a vessel failure
What is the purpose of pressurizing the boiler during a hydrostatic test?
To test the boiler's strength and detect leaks
How long must the pressure be held during a hydrostatic test?
Until the inspector completes the inspection
What must be done with the safety valve during a hydrostatic test?
It must be removed or blanked off
Why are the gauge glass connections closed during a hydrostatic test?
To prevent water from leaking out
What should be done after the hydrostatic test is complete?
Crack open a drain to slowly bleed off the pressure
What is the purpose of the Power Engineer during a fireside inspection?
To assist the inspector
MEDIUM During a fireside inspection, what is the primary reason for removing sections of refractory or insulation?
To inspect tube or drum surfaces
What is checked during a fireside inspection?
The fireside surfaces for bulges and blisters, and the ends of firetubes for signs of leakage
What is the primary purpose of a hydrostatic test on a boiler?
To check the tightness of the pressurized parts of a boiler
What should be closed during a hydrostatic test?
All valves, except the vent valve and feedwater supply valve
What is the recommended temperature range for the water during a hydrostatic test?
Between 20°C and 50°C
Why must all air be vented from the boiler during a hydrostatic test?
To prevent compressed air from causing vessel failure
What is the purpose of pressurizing the boiler during a hydrostatic test?
To check the tightness of the pressurized parts
What should be done with the safety valve during a hydrostatic test?
It should be removed or blanked off
What should be done after the hydrostatic test is complete?
The pressure should be slowly bled off, and then the drains should be closed
During a fireside inspection, what is the role of the Power Engineer?
To assist the inspector and point out defects in the associated plant equipment
What is the primary purpose of removing deposits from pressure parts during a waterside inspection?
To provide a clean metal surface for further inspection
What is the significance of analyzing the deposit composition in a detailed inspection report?
It identifies the type of scale or deposit
Why is it essential to check stays during a waterside inspection?
To inspect for looseness and cracking at the fastened ends
What is the purpose of opening pressure control lines during a waterside inspection?
To inspect for scale or other deposits
What is the significance of inspecting drum welds during a waterside inspection?
To inspect for any signs of corrosion or cracking
What should be done with pigtails during a waterside inspection?
They should be made available for inspection
Why is it important to inspect manhole and handhole openings during a waterside inspection?
To inspect for signs of corrosion or pitting
What is the purpose of inspecting drum connections during a waterside inspection?
To inspect for signs of corrosion or pitting
HARD What is the primary reason for cleaning pressure parts internally during a waterside inspection?
To provide a clean metal surface for further inspection
What is the significance of analyzing deposit composition in a detailed inspection report?
To understand the impact on heat transfer
Why is it essential to inspect drum welds during a waterside inspection?
To ensure the drum's structural integrity
What is the purpose of removing plugs in the water column, feeder, and low water cut-off connection piping during a waterside inspection?
To inspect for scale or other deposits
Why is it important to inspect stays during a waterside inspection?
To check for looseness and cracking
What is the purpose of opening pressure control lines during a waterside inspection?
To permit inspection of connected components
Why is it essential to inspect manhole and handhole openings during a waterside inspection?
To check for corrosion and pitting
What is the purpose of inspecting drum connections during a waterside inspection?
To check for signs of corrosion
What is the primary purpose of inspecting the tubesheet ligaments during a fireside inspection?
To examine for cracking and deterioration
What is the recommended procedure for venting air from the boiler during a hydrostatic test?
Make sure all air is vented from the highest points of the boiler as it is being filled
What is the primary reason for removing or blocking off certain controls during a hydrostatic test?
To prevent damage from excessive pressure
What is the purpose of filling the boiler with water between 20°C and 50°C during a hydrostatic test?
To prevent brittle fracture and burn hazards
What is the primary responsibility of the Power Engineer during a fireside inspection?
To assist the inspector and point out any defects known to exist
What is the significance of inspecting the ends of firetubes during a fireside inspection?
To check for signs of leakage and erosion
What is the primary purpose of holding the pressure at 1 ½ times the MAWP during a hydrostatic test?
To detect any small leaks or hairline cracks
What is the recommended procedure for releasing the pressure after a hydrostatic test?
Crack open a drain and allow the pressure to slowly bleed off
What is the primary purpose of inspecting the refractory and brickwork of the burners during a fireside inspection?
To inspect for deterioration and damage
What is the significance of the ASME Boiler and Pressure Vessel Code, Section VII, during a hydrostatic test?
It provides detailed requirements for the care of power boilers
Study Notes
Internal Inspection
- Consists of a waterside inspection and a fireside inspection
Waterside Inspection
- Examines boiler drums, drum internals, tube connections, waterwalls, superheaters, economizer, and fittings
- Pressure parts are examined for deposits and scale and may be cleaned internally using mechanical or chemical methods
- A detailed inspection report may be required, including measurement of deposit thickness and lab analysis
- Inspector looks for signs of corrosion, pitting, and cracking of metal surfaces
- Stays are checked for looseness and cracking at the fastened ends
- Particular attention is paid to manhole and handhole openings and drum connections
Fireside Inspection
- May require removal of refractory or insulation to facilitate inspection of tube or drum surfaces
- Fireside surfaces are examined for bulges and blisters, indicating overheating
- Ends of firetubes are checked for signs of leakage, and tubesheet ligaments for cracking
- Tubes adjacent to soot blowers are examined for signs of erosion due to direct steam impingement
- Refractory and brickwork of burners, baffles, and furnace walls are checked for deterioration
Hydrostatic Test
- Enables inspector to check tightness of pressurized parts of a boiler and find small leaks
- Detailed requirements for hydrostatic tests are described in ASME Boiler and Pressure Vessel Code, Section VII, and National Board Inspection Code
- Procedures for heating boilers and power boilers differ
Power Boiler Procedure for Hydrostatic Test
- Close manholes and handholes, ensuring no debris or tools are left in drums
- Close all valves, except vent valve and feedwater supply valve, and gauge glass connections
- Remove or block off any control that cannot withstand hydrostatic test pressure
- Fill boiler with water between 20°C and 50°C, venting all air from highest points
- Pressurize boiler slowly to 1 ½ times MAWP, holding pressure for inspection
- Visually inspect all accessible pressurized parts for signs of leakage, and observe pressure gauge for drops in pressure
- After test, crack open a drain and allow pressure to slowly bleed off, closing all drains unless intending to drain boiler further
Internal Inspection
- Consists of a waterside inspection and a fireside inspection
Waterside Inspection
- Examines boiler drums, drum internals, tube connections, waterwalls, superheaters, economizer, and fittings
- Pressure parts are examined for deposits and scale and may be cleaned internally using mechanical or chemical methods
- A detailed inspection report may be required, including measurement of deposit thickness and lab analysis
- Inspector looks for signs of corrosion, pitting, and cracking of metal surfaces
- Stays are checked for looseness and cracking at the fastened ends
- Particular attention is paid to manhole and handhole openings and drum connections
Fireside Inspection
- May require removal of refractory or insulation to facilitate inspection of tube or drum surfaces
- Fireside surfaces are examined for bulges and blisters, indicating overheating
- Ends of firetubes are checked for signs of leakage, and tubesheet ligaments for cracking
- Tubes adjacent to soot blowers are examined for signs of erosion due to direct steam impingement
- Refractory and brickwork of burners, baffles, and furnace walls are checked for deterioration
Hydrostatic Test
- Enables inspector to check tightness of pressurized parts of a boiler and find small leaks
- Detailed requirements for hydrostatic tests are described in ASME Boiler and Pressure Vessel Code, Section VII, and National Board Inspection Code
- Procedures for heating boilers and power boilers differ
Power Boiler Procedure for Hydrostatic Test
- Close manholes and handholes, ensuring no debris or tools are left in drums
- Close all valves, except vent valve and feedwater supply valve, and gauge glass connections
- Remove or block off any control that cannot withstand hydrostatic test pressure
- Fill boiler with water between 20°C and 50°C, venting all air from highest points
- Pressurize boiler slowly to 1 ½ times MAWP, holding pressure for inspection
- Visually inspect all accessible pressurized parts for signs of leakage, and observe pressure gauge for drops in pressure
- After test, crack open a drain and allow pressure to slowly bleed off, closing all drains unless intending to drain boiler further
Internal Inspection
- Consists of a waterside inspection and a fireside inspection
Waterside Inspection
- Examines boiler drums, drum internals, tube connections, waterwalls, superheaters, economizer, and fittings
- Pressure parts are examined for deposits and scale and may be cleaned internally using mechanical or chemical methods
- A detailed inspection report may be required, including measurement of deposit thickness and lab analysis
- Inspector looks for signs of corrosion, pitting, and cracking of metal surfaces
- Stays are checked for looseness and cracking at the fastened ends
- Particular attention is paid to manhole and handhole openings and drum connections
Fireside Inspection
- May require removal of refractory or insulation to facilitate inspection of tube or drum surfaces
- Fireside surfaces are examined for bulges and blisters, indicating overheating
- Ends of firetubes are checked for signs of leakage, and tubesheet ligaments for cracking
- Tubes adjacent to soot blowers are examined for signs of erosion due to direct steam impingement
- Refractory and brickwork of burners, baffles, and furnace walls are checked for deterioration
Hydrostatic Test
- Enables inspector to check tightness of pressurized parts of a boiler and find small leaks
- Detailed requirements for hydrostatic tests are described in ASME Boiler and Pressure Vessel Code, Section VII, and National Board Inspection Code
- Procedures for heating boilers and power boilers differ
Power Boiler Procedure for Hydrostatic Test
- Close manholes and handholes, ensuring no debris or tools are left in drums
- Close all valves, except vent valve and feedwater supply valve, and gauge glass connections
- Remove or block off any control that cannot withstand hydrostatic test pressure
- Fill boiler with water between 20°C and 50°C, venting all air from highest points
- Pressurize boiler slowly to 1 ½ times MAWP, holding pressure for inspection
- Visually inspect all accessible pressurized parts for signs of leakage, and observe pressure gauge for drops in pressure
- After test, crack open a drain and allow pressure to slowly bleed off, closing all drains unless intending to drain boiler further
This quiz covers the procedures and components involved in internal boiler inspections, including waterside and fireside inspections, and the cleaning of pressure parts.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
