Ace Tank & Equipment Co.: Manufactures and distributes petroleum storage tanks and petroleum handling equipment.
Commercial Welding Co.: Manufacturers of above ground steel storage tanks.
Denali Incorporated: Manufactures fiberglass composite underground storage tanks, steel rectangular aboveground storage tanks and engineered fiberglass reinforced composites for handling corrosive fluids. (Nasdaq: DNLI).
Freeman Brothers: Above ground fuel tanks for petroleum products containments.
Oreco A/S: Systems for automated cleaning of oil storage tanks. Desludging, cleaning and hydrocarbon recovery using environmentally friendly processes.
SuperSafe Tanks Inc.: Manufacturers of above ground fuel storage tanks providing safe storage of petroleum products for vehicles and aircraft, fueling stations, heating oil storage, chemicals, and hazardous waste containment.
Tanco Engineering, Inc.: Provides the petrolium industry with tank construction and renovation services.
Trans-Tainer Pty Ltd.: Transportable intermediate bulk containers of stainless and carbon steel. Operating in Australia.
TS Tanksystem SA: Gauging and sampling equipment for storage tanks and marine vessels. Ball valves. Temperature gauges.
Wilco Machine & Fab, Inc.: Manufacturer of machined and fabricated metal products and equipment for the oil and gas service industry. Products include ASME pressure vessels, bulk storage and conveying equipment.