Pressure Vessels and Tanks

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Joseph Oat has been manufacturing pressure vessels and tanks longer than any other company in the United States. Our experience and expertise in the design and manufacturing of pressure vessels and tanks in all sizes and for a myriad of applications is well documented. From small precision vessels to huge equipment weighing up to 200 tons, Oat designs and fabricates equipment for chemical plants, refineries, utilities, pharmaceutical applications, special process needs, power applications including nuclear power, cryogenic applications, and other applications too numerous to mention. Our range of equipment includes storage vessels, reactor vessels, special process vessels, and columns. We have shipped equipment to all corners of the world. We have manufactured equipment over 20 ft. in diameter by over 200 ft. long. Whether we perform a full mechanical evaluation including seismic and fatigue analysis or fabricate to “build to print” specifications, Oat provides high quality work and competitive pricing.

Combining the many decades of experience which our engineers have earned in this industry, the customer can be certain that they are receiving the latest state-of-the-art technology. In addition, our production department has a wealth of fabrication experience and has manufactured thousands of pressure vessel and tanks to stringent customer specification requirements. Our ASME certifications, including ASME Sec I, III (all classes), VIII Div 1 and VIII Div 2 provide us with the opportunity to serve the customer in virtually any application where pressure vessels and tanks are required. We can also manufacture units to European standards, including PED.

Equipment is manufactured in virtually any alloy available, including all steels and stainless steels, duplex alloys, nickel alloys, copper alloys, exotic alloys, reactive metals, and clad of all types.

A partial list of pressure vessels and tanks manufactured by Oat follows:


Nuclear and Commercial Power

  • Pressurizers
  • Demineralizers
  • Evaporators
  • Air receivers
  • Diesel fuel oil and other storage tanks
  • Drain tanks
  • Degasifiers
  • Accumulators

  • Surge tanks
  • Suppression pool quenchers
  • Strainers (basket and “y’)
  • Filters
  • Volume control tanks
  • Submerged bed scrubbers
  • Reactors and converters (solar power)
  • Many other types


Industrial (chemical, refinery, offshore platform, pharmaceutical, pulp & paper, mining, LNG, etc.)

  • Reactors
  • Columns and towers
  • Crystallizers
  • Storage Tanks
  • Evaporators
  • Vacuum vessels

  • Surge drums
  • Strippers
  • Separators
  • Converters
  • Mixers
  • Many other types


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