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Didion's Mechanical Logo
Example of a vessel by Didion's Mechanical.
A custom, certified autoclave vessel.
Example picture of a separator by Didion's Mechanical.
Didion Vessel Logo

Didion Vessel

ASME Pressure Vessel Company

Our focus is on heavy high pressure units, along with large custom designs. We are family owned and operated, with more than 30 years of experience, and over 3,100 vessels certified. We take pride in being able to make quick deliveries, while maintaining what we consider to be the best quality.

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Didion Autoclave logo

Didion Autoclave

Autoclave Company

We custom design and build all of our ASME certified autoclaves to fit your needs. Above all we offer what we feel are the safest autoclaves in the industry. They also have easy to use controls that can easily integrate into your system. Start-up assistance and repair services are also available.

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Didion Separator Logo

Didion Separator

Moisture Separator Company

We specialize in the design and build of various types of separators. To explain, these units separate the entrained droplets and debris from gas and steam lines. We offer a standard model line, therefore, they can quickly be shipped to you. We also offer custom designs to suit your unique gas flow.

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Quick Overview - Didion's Mechanical

Standards Worked To

  • ASME Sect VIII, Div. 1, 2, & 3
  • ASME Sect 1; ASME B31.1 & B31.3
  • NBIC (Vessel Repairs)
  • PED (CE Stamp), ABS, API, AWS

Sizes Handled

  • 15 Ft. Dia. x 120 Ft. Lg. (In Shop)
  • 25 Ft. Dia. x 200 Ft. Lg. (Yard)
  • (Yard fabrication is at our facility)
  • No Weight Limit (Hydraulic Lifts)

Alloys Worked With

  • All carbon and stainless grades and duplexes
  • Also, Inconel, Chromes, Aluminum
  • (List is not exhaustive)

In-House Services

  • Engineering, Drafting
  • Fabrication
  • Machining
  • Heat Treating
  • Sand Blasting, Painting
  • Certified Weld Inspection (CWI)

In-House Testing

  • Hydrostatic , Pneumatic
  • Radiography (RT)
  • Mag-Particle (MT)
  • Liquid Penetrant (PT)
  • Positive Metal Identification (PMI)

Didion End Goal

  • Above all, to provide for our family. Also, to provide you with the best of equipment and service; Ensuring that years later, while your vessels continue to operate, you will fondly remember your friends at Didion's Mechanical.

Our Customers Speak

"It was good to see that you have brought your sons into the business, which will provide longevity for the Didion name. Also, I would like to compliment all your workers on the good quality workmanship." -K.D., Detroit Stoker
"The vessel has done a very good job since [it was put] in service. I greatly appreciate your hard work and good quality product." -J.W., CalEnergy
"I hope we can do a lot of business! Your response is outstanding. Seriously, thank you." -C.B., DMC-CC
"The quality of work on the vessel was very impressive. It has been some time since I have had a documentation package completed on time at the end of a project. This is one of the first times I have not had to go back to the fabricator for further information." -Bob, Q.C.
Their manufacturing staff is friendly, knowledgeable, and able to handle any of our complex questions or requests. I can confidently recommend [Didion Vessel] as a reliable supplier and an expert in their field.” -W.C., Detroit Stoker
“The quality of your manufacturing is some of he best I have seen; And I have a background in code vessel manufacturing.” -D.D., GTUIT
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About Didion's

Didon’s Mechanical is a family of companies, which includes Didion Vessel, Didion Autoclave, and Didion Separator. All are owned and operated by the Didion family in Belleuve, Ohio USA.

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