Residual / Remnant Life Assessment (RLA) Studies

Boiler Health Care Service

Remaining / Remnant Life Assessment Services (RLA)

As per Indian Boiler Regulation 1950, the critical components which may get subjected to high temperature and pressure needs examination through Non Destructive Testing (NDT) timely as per the regulations. Isgec have a team of well-specialized experts who are deeply involved in carrying out RLA Studies to ensure better operations

Isgec is a well-known Remnant Life Assessment Organization, Accredited by Central Boilers Board.

We provide In-Service Inspection for RLA Studies to maintain the operating capacity for a longer period of time and ensuring Safety & Integrity of equipment of the Thermal Power Plants.

Inspection Services are offered for any Size, Type, Pressure, Temperature and Make of Boilers.

Why RLA Study?

The high temperature operation of pressure parts are subjected to creep stress at elevated pressure
The starting and stopping of the boiler unit results in fatigue stress
The fuel burnt can cause corrosion in various areas in the boiler
The water used for steam generation leaves deposits inside the tubes which increase the metal temperature leading to long term overheating
Residual stress during manufacturing, the vibration die to flow over the tube, mechanical vibrations, erosion due to the abrasive nature of the fuel, do occur in boiler
Boiler is operated beyond the specified operating parameters
All of the above, individually or combined lead to material degradation of different magnitude and will lead to failure.

RLA APPROACH / METHODLOGY

Collection of Back ground Data
Understanding the Actual Degradation Mechanism
Fatigue, Thermal fatigue, Thermo Mechanical Fatigue
Thermal Aging
Creep
Embitterment
Corrosion
Thorough Visual Examination by an Expert
Dimensional measurement at Critical location
Collection of Scale and Deposits Sample for Analysis
Thickness Survey
Internal oxide Scale Measurement at super heater tube and Re-heater tube
WFMPI of Main weld joints of Headers and Steam drum
In- Situ Metallography to determine thermal ageing and creep related problem from a RLA perspective
In- situ hardness measurement with portable hardness tester
Suggestion on repairing
Calculation and judgment of remaining life based on analysis