Here are some typical applications for 2205 (UNS S32205) and 1.4436 (AISI 316L) duplex stainless steels:

Applications of 2205 duplex stainless steel:

Offshore and marine environments: Offshore oil and gas platforms
Subsea equipment and pipelines
Desalination plants and seawater intake systems
Coastal and port infrastructure (e.g. piers, docks, breakwaters)

Chemical and Petrochemical Processing: Containers, tanks and piping for chemical plants
Equipment for handling corrosive chemicals and corrosive liquids
Refineries and petrochemical facilities

Pulp and Paper Industry: Digesters, evaporators and other process equipment
Pipes and valves for pulp and paper mills

Water and wastewater treatment: Desalination plant components
Wastewater treatment equipment
drinking water distribution system

Power generation: Nuclear power plant components
Coal-fired power plant flue gas desulfurization system
Geothermal power plant equipment

Building and Structural Applications: Building facades and cladding systems
Bridges, interchanges and other infrastructure
Urban furniture and design elements

Applications of 1.4436 (AISI 316L) super austenitic stainless steel:

Food and Beverage Processing: Equipment, tanks and piping for food, dairy and beverage plants

Pharmaceutical and Biomedical: Medical equipment, surgical equipment and laboratory equipment
Pharmaceutical processing equipment

General industrial applications: Process equipment, storage tanks and pipelines for various industries
Architectural and decorative elements

Low and high temperature applications: Liquefied Natural Gas (LNG) Facilities
Petrochemical plants and power generation equipment

While 2205 and 1.4436 are both duplex/super austenitic stainless steels, the superior corrosion resistance and mechanical properties of 2205 make it the first choice for more demanding structural and industrial applications, especially is in offshore, chemical and water treatment environments. 1.4436 is more suitable for applications where corrosion resistance and mechanical properties are somewhat lower, such as in the food, pharmaceutical and general industrial sectors.