Tank Container

ISO Tank Containers for Sale and Bulk Propane Storage Bullets

If you run a fuel-dealing operation, an industrial plant, or a large agricultural site, the tanks in this category are built for a different job than anything a homeowner shops for. This is where our bulk inventory lives: ISO tank containers, horizontal storage bullets, skid-mounted vessels, and swap body containers sized for moving and holding serious volumes of propane, LPG, and NGL. These are ASME-certified pressure vessels intended for permanent installation or intermodal transport, not backyard use.

Bulk storage bullets and skid tanks

Storage bullets are the workhorse of bulk propane. They range from 2,500-gallon units suited to a small dealer or a large farm up through 10,000, 18,000, 20,000, and 30,000-gallon vessels for distribution terminals and industrial process loads. Skid-mounted tanks arrive on a fabricated base, which shortens site work considerably where a permanent foundation is not practical. Current listed pricing in this category runs from roughly $1,520 for a compact ASME unit to about $35,000 for the largest storage bullets, with freight quoted separately from the tank price.

ISO tank containers and swap bodies

ISO tank containers are pressure vessels built inside a standard intermodal frame, so they move by ship, rail, and chassis without being decanted. That makes them the practical choice when product has to travel rather than sit. Swap body tank containers serve a similar role in regional road distribution. Both are worth considering when your constraint is logistics rather than storage capacity alone.

What buyers in this category should confirm

  • Site and code approval – bulk installations carry substantial NFPA 58 separation distances from property lines, buildings, and ignition sources, and require sign-off from your local authority having jurisdiction
  • Foundation and access – a loaded bullet is heavy, and the delivery truck needs stable ground and a workable approach
  • Certification and data plate – confirm the ASME stamp and a legible data plate before purchase, which matters most on used vessels
  • Service and fill logistics – fill connections, relief valve discharge points, and truck turnaround should be planned before the tank is set
  • Lead time – larger vessels and specialty containers are frequently built or sourced to order

Buying and delivery

Freight on bulk vessels is quoted per order rather than at the standard flat rate, because size, weight, and permitting vary widely; contact us for a delivered price to your site. Installation of any vessel in this class requires licensed professionals and, in most jurisdictions, permits and inspection. If you are still deciding between bulk storage and a smaller stationary tank, our tank sizing guide and cost guide are useful starting points, and the buyers guide covers specification basics. Browse the full range of propane tanks, review our shipping policy, or reach the team at (501) 218-9328 to discuss a bulk quote.

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What an ISO Tank Container Actually Is

An ISO tank container is a pressure vessel mounted inside a standard 20-foot intermodal frame, which is what lets it travel by truck, rail, and ship without being repacked at every leg. For a flammable gas like propane or LPG, the relevant type is the T50 gas container, rated for pressure and fitted with relief valves, liquid and vapor lines, and gauges. The frame does the structural work; the barrel holds the product. Our 20 ft ISO tank container is a clean example of the format, and it is a practical pick when you need storage that can also move with a job instead of staying bolted to one address. People in the trade call these isotainers or intermodal tanks, and the terms all point to the same thing.

Storage Bullets or ISO Containers – Which One Your Operation Needs

A storage bullet is a horizontal, stationary tank. It sits on a pad, gets plumbed in, and stays put. That is the right answer for a propane depot, a co-op, or a plant that draws steadily from one location. An ISO container earns its keep when the fuel has to follow the work, whether that is seasonal crop drying, a remote job site, or backup supply that rotates between yards.

Honestly, for a location that is fixed for years, a bullet is the better value. The intermodal frame on an ISO unit adds cost you will not use if the tank never leaves the property. Our 18,000-gallon ASME skid tank splits the difference, giving you a large-capacity storage vessel on a skid base that a heavy-equipment operator can reposition without pouring a permanent foundation.

Where Skid Tanks Fit

Skid units suit dealers who add capacity in stages or shift storage between depots as demand moves through the year. You get bullet-scale volume without committing to a slab you might walk away from in two seasons. Once you get above 10,000 gallons, the freight and rigging start to matter as much as the tank price itself, so it pays to plan both before you buy.

Sizing Bulk Propane Storage

Bulk tanks fill to roughly 80% of rated capacity, leaving the liquid room to expand as temperatures climb. That means a 30,000-gallon bullet holds about 24,000 usable gallons. The headspace is not optional. It is what keeps vapor pressure in a safe band across a hot afternoon, and every commercial buyer should size around usable volume rather than the number on the label.

Most operations size up rather than down. A 1,000-gallon combination tank covers light commercial and mid-size agricultural draw, while a 500-gallon ASME underground unit works well for a smaller satellite site. Buying volume ahead of winter, when spot fuel prices tend to soften, is the usual reason dealers jump to the next capacity up. It is less about the tank and more about locking in cheaper propane before the cold hits.

Certification, Testing, and What Ships With Your Tank

Every container we sell is ASME- or DOT-certified for its intended service and ships pressure-tested with its documentation. Keep that paperwork with the tank, because it matters at inspection and again at resale. One thing worth saying plainly: installing a bulk vessel is not a DIY project. Siting, setbacks, and connection have to meet NFPA 58 and your local fire code, and that work belongs to a licensed installer. We ship the certified tank; your qualified contractor sets it on the pad or in the ground.

Buy ISO Tanks and Storage Bullets Nationwide

We ship bulk tanks across the contiguous United States on flat-rate freight of $350, with delivery timing that depends on size and destination. If you are weighing capacity, comparing a bullet against an ISO container, or you just want a freight quote for a specific ZIP, our buyers guide covers sizing and certification, and you can contact our team at (501) 218-9328 for pricing and lead times. Tell us the volume you are moving and where it needs to go, and we will tell you what actually fits.