• LPG Underground Storage Tank Solutions
  • Underground LPG Bullet Steel Storage Tank


Modern Welding has the experience, capacity and flexibility to offer reliable underground vessel solutions for your custom storage vessel application. We provide storage solutions for LPG (Liquefied Petroleum Gases), Propane, Butane, Pentane, Aqueous Ammonia, Anhydrous Ammonia, and other gaseous products. 


  • Used for a variety of applications. Space heating, autogas, crop drying, generators, etc. 
  • Underground design with corrosion protection options available
  • Volume 3,900 to 90,000 gallons
  • Built in compliance with ASME Sec. VIII, Div. I
  • Standard 250 psi @ 125 degrees F
  • Grade SA-612 or SA-516-70 material
  • Standard NPT threaded fittings and 16" manway included
  • External surface prep per SSPC-SP6
  • Coatings per customer specification

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