Industries Served


Process specific defines the specialty chemical industry and Fourinox has decades of experience fabricating custom solutions for the chemical processing market.  High temperature, pressure, cyclic analysis, FEA, corrosion resistance are all considerations that go into the proper design of a custom fabricated production vessel for the chemical industry.   When engineering is complete, our craftsmen take over to ensure the highest quality while fabricating unlimited designs including:

  • Process Vessels
  • Reactors
  • Heat Exchangers
  • High Viscosity Mixing Equipment
  • Storage Tanks


Fourinox’s experience with water process in fabrication, engineering and quality control are well suited to projects needed for defense industry use. From process, waste recovery, decontamination, and storage, Fourinox has many years of experience as a Prime Contractor to the U.S. military.

  • Process tanks
  • Demineralizers
  • Decontamination
  • Waste Storage Tanks
  • Waste Recovery Tanks


You can find examples of Fourinox vessels on five of the seven continents world-wide in Water Process.  From small and simple to large scale complex industrial process systems, these projects include:

  • Slurry Tanks
  • Shell and Tube Heat Exchangers
  • Demisters
  • Surge Tanks
  • Recirc Piping
  • Process and Pressure Vessels
  • Storage Tanks


Fourinox began as a division of parent company Fourcorp and specialized in pharmaceutical fabrications. These vessels typically require polishing and close control of cross material contamination. Our procedures ensure the proper management of these specialized fabrication and testing requirements particular to the pharmaceutical industry. Our Quality Control system also ensures compliance to unique specifications for surface profile finishing, spray ball wash and Riboflavin coverage testing, and Helium leak/vacuum testing among others. We have the capability and experience to fabricate a wide range of vessels for the pharmaceutical industry including:

  • Reactors
  • Chromatography Columns
  • Filter Vessels
  • Storage Tanks
  • Pressure Vessels
  • Lyophilizers
  • Columns
  • Slurry Tanks


Located in Green Bay Wisconsin, Fourinox grew locally to service pulp and paper manufacturing market customers based in the “Paper Valley” corridor of Northeast Wisconsin.  We continue to serve the industry with custom fabrications and vessels for paper manufacturing and process pulping including:

  • Pressure Vessels
  • Storage Tanks
  • Pulper blade sharpening and remanufacturing
  • Augers

We are within easy reach of Wisconsin paper valley customers and have the capabilities and experience to fabricate your most specialized paper industry requirement nationwide.


Our experience with the Oil and Gas industry goes hand in hand with customers we service in the Specialty Chemical Market.  High pressure applications and processes requiring extreme corrosive resistance are commonplace in vessels and fabrications we manufacture including:

  • Separation Columns
  • Pressure vessels and reactors
  • API 650 Storage Tanks
  • Welded and explosion cladded overlay for highly corrosive applications
  • Automated overlay cladding of oil production, process, and piping components