Triple offset butterfly valve supplier give some key advantages of using duplex steels over stainless steels for triple offset butterfly valves are:
Higher strength
Duplex steels have significantly higher strength than standard stainless steels. This allows for reduced wall thicknesses and lighter valve weights, especially for high-pressure applications. The higher strength of duplex steels also provides better resistance to deformation and cavitation damage.
Better corrosion resistance
Duplex steels generally have better resistance to stress corrosion cracking and chloride pitting corrosion than standard stainless steels. This is important for applications where seawater or chlorinated chemicals are involved. The higher chromium and molybdenum content of duplex steels enhances their corrosion resistance.
Longer service life
The superior strength and corrosion resistance of duplex steels enable them to have a longer in-service operating life compared to stainless steels. This is valuable for critical oil and gas applications where replacement or repair work is difficult.
Cost saving
Although duplex steels are more expensive than stainless steels per unit weight, their higher strength means that less material is required for a given application. This can result in lower overall costs, especially when fabrication and installation costs are considered.
Wider operating window
The combination of high strength and corrosion resistance in duplex steels provides a wider safe operating window compared to stainless steels. This allows them to handle more severe service conditions if required.
Higher operating temperatures
Duplex stainless steels generally have higher temperature capabilities than standard austenitic stainless steels. This may provide benefits where process temperatures are elevated.