Leading NorCal Engineering & Fabrication Services shop Johansing celebrates its 30 year milestone with an announcement that is now a part of Unico Mechanical. Johansing’s deep expertise in heat exchangers and pressure vessels of all types is a natural fit with Unico’s offerings and experience while bringing national board “R” stamp and “U” stamp certifications required by regional customers.

“Johansing is one of the only engineering and machine shops in the region that has both the certifications and expertise to serve the requirements of area oil and gas industry customers”, said Randy Potter, President of Unico and co-owner of the companies. “We felt the capacity and range of services that Unico brings allows Johansing to offer its customers expanded capabilities, in-house repair and fabrication services and experienced onsite field services teams.”

“Our new company branding represents the expanded capability across our group of companies here in the western region”, said Mike Potter, President of Bender, CCP, which is the third company in the portfolio co-owned by brothers Mike and Randy Potter. “We are proud to be one of the leading machine shops and field services companies here in California and to have built a reputation for quality work no matter the size or the complexity of the job.” The three companies serve a number of industries including oil and gas, maritime, power or other industries.

Johansing specializes in heat exchangers and pressure vessels including:

  • Specializes in re-tubing of heat exchangers

  • 'R' Stamp welding repairs

  • New construction and alterations of heat exchangers of all types

Machining Capabilities Include:

  • 120,000 lbs capacity

  • CNC Machining up to 60” x 30” x 30” high

  • Machining up to 240” Diameter and 35" in length

  • Vessels up to 10,000 PSI pressure rating


  • CE and TUV certified vessels

  • National Board “R” stamp for repair and alterations

  • ASME “S”stamp for boiler and steam piping

  • ASME “U” stamp for pressure vessels

  • ASME and CE certified for welding

To learn more about company services or to ask questions about a project, contact the company by email or