Paya Mavad Company specializes in the precise overhaul of gas turbine inner casings, providing engineered services to extend the lifespan and enhance the performance of turbines. The refurbishment process includes non-destructive inspection, crack repair, precise machining, and protective coating application, using advanced technologies and durable materials to ensure component durability under harsh operating conditions. Timely refurbishment of the inner casing reduces repair costs, prevents serious failures, and optimizes power plant performance. These specialized services by Paya Mavad are a reliable choice for power generation, oil, gas, and petrochemical industries seeking to maintain and improve gas turbine operation.
Maintenance of gas turbine renovation blades is important because these blades operate under harsh conditions. Therefore, nickel-based superalloys that provide excellent performance under high-temperature conditions are typically used, and blades are inspected and replaced according to the manufacturer’s maintenance standards. However, according to the manufacturer’s criteria, the useful life can be extended by refurbishing blades that have exceeded their warranty life. Turbine blades are a key component of gas turbine maintenance and are exposed to various damage mechanisms such as oxidation, thermal fatigue and creep in high temperature and high pressure environments. In addition, the turbine inlet temperature is continuously increased to maintain high efficiency. Nickel-based superalloys are commonly used as blade materials because they have excellent mechanical properties such as resistance to creep, corrosion, wear, and oxidation under high-temperature, high-pressure conditions.
The significant cost of replacement parts has led to the development of repair processes to extend the life of parts. One of these processes is full solution renewal heat treatment, which is designed to restore the alloy’s microstructure and mechanical properties to new conditions.
Renovation of gas turbine parts consists of two stages:
fault detection
At this stage, the experts put the gas turbine under a visual or expert inspection. FPI-assisted metallographic inspection, dimensional penetrants, and other EDX inspections are commonly used to detect defects.
Method selection
Renovating and doing the process. Experts use different methods to refurbish gas turbine parts. The method will be chosen according to the extent of the damage.
But in general, the following methods are used to renew parts:
- Removing covers and replacing new covers
- Reconstruction of all types of mechanical failures
- Implementation of renovation processes
- Advanced welding such as laser powder welding
- Thermal repair
