Custom Pressure Vessels

Pressure Vessel fabrication, manufacture, and repair. The STI Group offers comprehensive pressure vessel fabrication services to our customers.


Project Execution


Uncompromising safety


Custom Pressure Vessels

Built to your exact specifications

Built to your exact specifications, we offer custom pressure vessel design and manufacturing services. Pressure Vessel fabrication, manufacture, and repair. The STI Group offers comprehensive custom pressure vessel fabrication services to our customers. We manufacture to ASME Section VIII, Div. I am certified and hold ASME U, S, and NBIC R stamps. The STI Group produces shop drawings and utilizes advanced pressure vessel software for all vessel manufacturing. Our niche is vessels 8’ in diameter or smaller in all grades of carbon steel, custom stainless steel pressure vessels, and many other alloy materials.

The ASME Boiler and Pressure Vessel Code is recognized worldwide. However, we are not limited to only ASME but also can build vessels to the requirements of the US Coastguard, American Bureau of Shipping, Lloyd’s of London, Det Norske Veritas, and other national and international jurisdictions.

Many purchasers of non-pressure tanks specify ASME Code construction to take advantage of the strict quality controls that the ASME demands. The STI Group tanks, even non-code, are built to code standards, pressure tested, and fully documented before shipment.

The STI Group vessel facilities location has years of experience in material processing, assembling, and installing high-quality, code-compliant pressure vessels. Our expertise includes the fabrication of high-pressure vessels, low-pressure, cooling, heating, or secondary containment vessels, and we also offer affordable installation and pressure vessel equipment repair.

Utilizing state-of-the-art facility operations under strict ASME and API guidelines, our quality control processes ensure that each product operates efficiently, safely, and durably. We guarantee a steadfast commitment to added-value craftsmanship and fast turnaround. Our custom pressure vessels are designed to be affordable, built to last, and will provide uncompromising service in your industrial environments.

Vessels fabricated can include specific calculations and tolerances such as:

  • Horizontal or vertical design
  • Seismic and wind loading
  • Modular packages
  • Customized sizing
  • Maximum stress resistance
  • Extreme chemical and solvent tolerance
  • And often include accessory piping, valves, ladders and platforms, and sheet metal attachments.

STI Group-Fabrication serves the following industries:

  • Petrochemical
  • Chemical
  • Refining
  • Oil & Gas Production
  • Drilling
  • Energy
  • Power Generation