pressure-vessels-manufacturerDidion's Mechanical
Phone: (419)483-2226 Email

Address:- 1027B Co. Road 308, Bellevue, Ohio 44811


About Didion's Mechanical

We are a leading pressure vessel fabricator with a reputable industry standing of over 35 years

Since its 1977 inception, Didion’s Mechanical, a family owned and operated business, has charted a strong, stable growth story as an American Society of Mechanical Engineers (ASME) code certified shop. Our focus on quality has helped us build a veritable reputation in the market.

As an A.S.M.E. code certified shop, we are current holders of the U, U2, U3, S, and PP stamps and the National Board R repair stamp.Didion’s Mechanical can also certify equipment in accordance with the European Pressure Equipment Directive (P.E.D.), and stamp it with the CE stamp. This has made us a preferred pressure vessel fabricator in the Industry. Our Fabrication Capabilities Include:

  • Pressure Vessels
  • High Pressure Vessels
  • Heat Exchangers
  • Autoclaves
  • Cryogenic Vessels
  • Vacuum Chambers
  • Process / Power Piping
  • Large & Heavy Machining
  • Weld Overlay / Clad Pressure Vessels
  • Separators, Reactors, Columns, Ect

In addition to these capabilities, we provide special services pertaining to engineering, heat treating, radiography, and rigging. We can also handle your most challenging steam and moisture separator requirements through the Didion Separator Company, our specialized division. If you are looking for a reliable pressure vessel fabricator, we would be happy to assist.

Capabilities at a Glance
We offer specialized services that include: radiography, stress relieving, machining, engineering, design, cold shocking, hydro testing, decay testing, pneumatic testing, sandblasting, and painting. All of these abilities have helped us consolidate our position as a leading pressure vessel fabricator.

With well-established and proven procedures for numerous types of steel, chromes, and exotic alloys, Didion’s Mechanical is your trusted source for the most challenging fabrication jobs. Our operations and methods are continually kept at state-of-the-art levels, including N.D.T. inspection procedures such as in-house industrial radiography.

A Proven Industry Track Record
Didion’s Mechanical has produced over 3,100 A.S.M.E. certified pressure vessels that are registered with the National Board. The quality and speed with which we deliver each fabricated product is rarely matched by any other pressure vessel fabricator. Didion’s Mechanical is driven by a strong management team, and highly motivated staff that takes great pride in each and every product, custom fabrication, and service that we provide.

How May We Be Of Service To You?
We welcome an opportunity to collaborate with you on your next challenge. We stand committed, as always, to upholding the consistently high levels of quality, reliability and efficiency that have built our reputation in the industry. We do not need to be the biggest, but we won't settle for being less than the best!

To discuss your next high pressure vessel requirement with us, please call us at (419)483-2226 or send us an email at