How to do RLA Study of Boiler
Procedure for RLA Study
Power plant equipment and its components are operated into hi temperature, frequent fluctuation of pressure and temperature, frequent start/stop, erosion and corrosion environment. Collect the operation data identify the critical items and formulate plan for inspection. Flow diagram for RLA procedure is like below fig.
Boiler RLA:
Critical pressure parts of Boiler are:
· Drum- steam
· Headers- both steam and water
· Tubing- Super heater, water wall, economizer
· Piping- Steam and feedwater
· Deaerator
· Attemperator
Testing and Inspection plan for Boiler :
Items |
Testing |
|
Drum |
Visual |
VI |
WFMT |
Wet Fluorescent Magnetic Particle |
|
UTT |
Ultrasonic Thickness Testing |
|
Tubes |
Visual |
|
UTT |
||
EMATs based inspection |
Electromagnetic acoustic transducer |
|
Hardness |
||
Headers/ Pipes |
Visual |
|
WFMT |
||
Video probe Inspection |
||
UT |
Ultrasonic test |
|
Replica |
Based on the
inspection and operating data analysis decision is to be taken which parts can
be Run- Repair- Remove.
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