The Grudziadz CCGT Power Plant, a landmark 560MW high-efficiency combined-cycle gas turbine project invested by ORLEN Group and Energa, stands as a core infrastructure for Poland’s energy transition and national power security. Equipped with advanced Siemens SGT5-4000F gas turbines and three-pressure reheat HRSG systems, the plant delivers stable, low-carbon power supply for up to 1 million local households, effectively balancing renewable energy volatility and reducing regional carbon emissions. Behind the core power generation equipment, high-performance metal expansion joints, rubber expansion joints, and industrial valves serve as the essential piping backbone, ensuring long-term stable, safe, and low-maintenance operation of the entire power system.
Modern CCGT power plants feature complex and rigorous fluid pipeline systems, covering natural gas fuel supply, high-temperature steam circulation, feedwater and condensate treatment, circulating cooling water, flue gas and air duct systems. Frequent unit start-stop operations cause drastic temperature fluctuations, leading to severe thermal expansion and contraction of large-diameter pipelines. Meanwhile, rotating equipment such as gas turbines, fans, and water pumps continuously generates mechanical vibration and pressure pulsation. Without professional compensation and control piping components, the pipeline system will face excessive thermal stress, structural displacement, fatigue cracking, medium leakage, and even unplanned unit shutdowns, severely affecting power generation efficiency and operational safety.
Metal Expansion Joints: Core Thermal Compensation for High-Temperature Flue & Steam Systems
Custom heavy-duty metal expansion joints are widely applied to the large-diameter flue gas ducts and high-pressure steam pipelines of the Grudziadz CCGT plant. Including dog-bone tied type, universal unrestrained type, lateral and hinged structural bellows joints, these components are specially engineered for the plant’s high-temperature, cyclic operating conditions. Capable of absorbing multi-directional thermal displacement and mechanical deformation of ultra-large pipelines, they effectively release extreme thermal stress generated during unit startup and shutdown. By isolating destructive structural thrust from gas turbines, HRSG boilers and steel frame structures, the metal expansion joints maintain the structural integrity and operational stability of the high-temperature flue gas and steam systems under long-term cyclic working loads.
Rubber Expansion Joints: Vibration Isolation & Displacement Compensation for Auxiliary Water Systems
High-performance rubber expansion joints are deployed in the plant’s circulating cooling water, closed cooling water, and chemical water treatment systems. Adopting reinforced high-elasticity composite rubber materials adapted to European power station standards, these joints integrate dual functions of vibration damping and displacement compensation. They effectively isolate high-frequency mechanical vibration transmitted from large-capacity circulating water pumps, absorb axial, lateral and angular displacement caused by installation deviations and foundation settlement. In addition, the corrosion-resistant rubber formula adapts to local water quality and long-term cyclic pressure changes, reducing pipeline operating noise, protecting pumps, valves and flange connections from fatigue damage, and extending the service life of the entire water system pipeline network.
Industrial Valves: Intelligent Flow Control & System Safety Protection
A full range of power-grade industrial valves undertake full-process fluid control and system protection tasks for the Grudziadz CCGT project. High-pressure ball valves, gate valves, globe valves and check valves are adopted for natural gas supply and high-pressure steam systems to realize precise cut-off, backflow prevention and stable medium transmission. Large-diameter butterfly valves are applied to circulating cooling water pipelines for efficient flow regulation. Supporting safety valves, steam traps and Y-type strainers ensure overpressure protection, automatic condensate drainage and medium impurity filtration. Whether in normal power generation, equipment maintenance or emergency working conditions, the complete valve system achieves reliable fluid management, forming a solid safety barrier for the stable operation of the entire power plant.
As a key low-carbon energy project in Poland’s energy transformation strategy, the Grudziadz CCGT Power Plant has extremely strict requirements on the reliability, durability and safety of piping accessories. Although metal expansion joints, rubber expansion joints and industrial valves are auxiliary components, they determine the pipeline operational safety, unit availability rate and full-cycle operation and maintenance cost of the power plant. The successful application of our products in this European benchmark CCGT project fully verifies the excellent performance and European standard adaptability of our power-grade piping solutions.
Our company specializes in the R&D and manufacturing of power plant-specific expansion joints, rubber flexible joints and industrial valves, providing one-stop customized piping solutions for global CCGT power plants, thermal power stations and energy infrastructure projects. For European standard power piping product consultation and project quotation, welcome to contact our professional engineering team.
