Customized High-Temperature Resistant Corrosion Resistant Hexagon Nuts for Steam Turbine Service

The connecting parts of steam turbine main bodies, valve assemblies and auxiliary equipment operate under complex working conditions with long-term high-temperature alternation, high-pressure loads and continuous vibration impacts. The temperature and medium environments vary greatly in different equipment areas, imposing differentiated requirements on the material strength, creep resistance and corrosion resistance of fasteners.

After long-term service, ordinary standard fasteners are prone to problems such as thread stress relaxation, creep elongation, rust seizure, fatigue fracture and preload attenuation. These defects will lead to excessive gaps on flange joint surfaces and loosening or displacement of components, resulting in steam and oil leakage, which endangers the stable operation of the unit.