Alloy 31 (UNS N08031) is a nitrogen-containing iron-nickel-chromium-molybdenum alloy with properties intermediate between super-austenitic stainless steel and traditional nickel-based alloys. HT PIPE is a alloy 31 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!
Key Applications in Environmental protection and energy field
alloy n08031 Absorber Internal Components
FGD systems are critical environmental protection facilities for reducing sulfur dioxide emissions in thermal power plants, waste incineration plants, and industrial boilers. The absorber is a core component in these systems, subject to extremely harsh internal environments: low temperatures (50-80°C), high chloride ion concentrations (up to tens of thousands of ppm), acidic slurries with a low pH (1-2), and the abrasive effects of solid particles, placing extremely high demands on the material.
alloy steel n08031 Spray Systems and Nozzles
In the spray system of an FGD system, Alloy 31 piping is used to transport limestone slurry or alkaline absorbent. These slurries contain high concentrations of chloride, fluoride, and sulfate ions, as well as unreacted sulfur dioxide and fly ash particles, creating an environment characterized by a combination of corrosion and wear.
Nozzles are vulnerable components in FGD systems, and their performance directly impacts desulfurization efficiency. Nozzles and delivery piping manufactured with Alloy 31 resist slurry erosion corrosion, maintaining a precise spray pattern for years.
alloy 31 Mist Eliminators and Lining Materials
Mist eliminators are critical components in FGD systems, capturing slurry droplets entrained in the flue gas. Alloy 31 is used in the manufacture of demister blades, support structures, and flushing pipes. Its corrosion and erosion resistance ensures long-term, efficient operation of the demister.
In addition, Alloy 31 sheet is used as a lining material for absorber towers, flues, and slurry tanks. When used as linings, Alloy 31 is bonded to a carbon steel substrate through explosive cladding or overlay welding, providing excellent corrosion resistance while reducing costs.
astm alloy 31 Desalination Equipment
Heat exchange systems, used in multi-stage flash evaporation (MSF) and multi-effect distillation (MED) units, are used to manufacture heating pipes, condenser pipes, and heat recovery system piping. High-pressure piping, used in reverse osmosis (RO) units, is used as the delivery piping after the high-pressure pump and is resistant to the highly corrosive and aggressive nature of high-pressure seawater. Pump and valve assemblies, used to manufacture key components such as pump casings, impellers, valve bodies, and valve cores.
aisi alloy n08031 Marine Energy Equipment
Subsea pipelines, used to transport acidic oil and gas containing CO₂ and H₂S, are resistant to external corrosion from seawater. Platform equipment, used to manufacture piping for seawater cooling systems, fire protection systems, and water injection systems. Offshore wind power, used for wind turbine cooling systems and transformer systems.
nickel alloy 31 Marine Pollution Control
In the marine pollution control sector, Alloy 31 pipes are used in ship wastewater treatment systems, offshore oil spill recovery equipment, and marine monitoring equipment. These devices handle wastewater containing various chemical reagents, oil-water mixtures, and corrosive samples, requiring comprehensive corrosion resistance.
ni n08031 Solar Thermal Power Generation
Alloy 31 pipes are used in molten salt transportation systems and energy storage systems. Its high-temperature strength and oxidation resistance ensure the long-term safe operation of these systems. In particular, in tower-type solar thermal power generation systems, Alloy 31 is used to manufacture high-temperature molten salt pipes and storage tanks, resisting the corrosive effects of molten salt at high temperatures.
uns n08031 Nuclear Fuel Reprocessing
In the nuclear energy sector, while Alloy 31 is not used in core nuclear reactor components, it has a critical application in nuclear fuel reprocessing facilities. Nuclear fuel reprocessing involves highly radioactive and corrosive chemical media, including hot concentrated nitric acid, hydrofluoric acid-nitric acid mixtures, and other chemical reagents. Alloy 31 exhibits excellent corrosion resistance in these environments and is used in the manufacture of chemical processing vessels, piping, and heat exchangers.
no8031 steel welded pipe Energy Storage Technology and the Hydrogen Economy
Flow battery systems, used in the electrolyte circulation systems of vanadium redox flow batteries (VRBs) and zinc-bromine batteries, resist corrosion from acidic electrolytes. Hydrogen production equipment, used in the manufacture of high-temperature and high-pressure pipelines and reactors in water electrolysis and thermochemical hydrogen production units. Hydrogen storage and transportation, used in the manufacture of hydrogen storage containers and delivery pipelines, resist hydrogen embrittlement and high-pressure hydrogen corrosion.
