Snyder Industries 6200 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

A tanker and a reserve in the middle wall

A water-rated wall is for water and nothing heavier; the full-density wall is for concentrated acid; a 1.5 wall is the middle, sized for brine, fertilizer solution and coagulant as delivered and every water application, with margin, and 1,350 pounds of resin is what that takes on this shell, 176 more than the 1.35 wall beside it. Rotationally molded polyethylene tanks are sized to ASTM D1998, and the way a tank meets the density it is rated for is in the wall; the HDPE tank wall thickness guide explains the sizing logic and why the headspace is where a wall ages, and the freeboard sizing guide works out the usable volume once thermal expansion is accounted for. Full, it puts 77,562 pounds on a 120 inch circle at the rating: an engineered slab with nothing but concrete under the whole floor, following the concrete pad sizing guide, with the empty tank strapped against wind. The tank sizing calculator tells you whether 6,200 gallons covers the draw, and the tank sizing guide covers days of supply.

Grades on the 120 x 140 inch tank, and the sizes beside it

The N39 is the 1.35 wall in this same shell, 176 pounds lighter, for alum and the lighter solutions; the C34 and C37-BLACK are the general grades at this tank's weight, the black one for sun, and the N33 a lighter linear grade. The 7140000N33 holds 6,500 gallons in black 13 inches taller, and the 7000000C34 holds 6,000 on this base 8 inches lower.

Need a different size? Every tank in the table is in stock programs; ask for a quote on the one that fits, or call 866-418-1777.

The fittings list

• Access: 18 inch threaded, vented manway, 140 inches up; filled by truck through a dip tube, vented outside on anything that fumes, and size the vent for a tanker's unload rate.
• Outlet: specify the bulkhead fitting for the liquid when ordering; a flexible connector at the bulkhead, an expansion joint in the run, and a valve on its own support off the slab.
• Service limit: 120 F.

The white wall shows the level in daylight; fit a sender read at ground level so nobody climbs for a number, and a float switch for low level protects a pump. Set the pump lower than the outlet so gravity primes it, keep the manway shut against vapor loss, and shade the tank if the liquid is light-sensitive. In a cold climate the outlet valve and the first run of pipe are insulated or drained; the body takes ice from the top down without harm.

Vent first, then fill

Unloading a tanker pushes air out faster than a stock manway vent can pass it; size the vent for that rate, or fill through a dedicated top bulkhead vented separately. The fill pipe runs to the floor so the liquid does not free-fall and foam. The first load into a new tank gets watched end to end, eyes on the slab edge and the outlet fitting while the level comes up, and each delivery after it is logged with its date and strength.

What goes in it

Coagulant, brine and fertilizer solution delivered by tanker with a reserve at plants and farms, well storage for a community system under a normal roof, a rain cistern under a large roof, and a fire reserve of the kind the fire-water reservoir design guide describes. One liquid per tank, labeled.

Getting it off the truck

At 120 inches across and 140 inches long on the deck the 8220000N43 ships as oversize freight on a flatbed at a lane rate; the freight cost estimator prices it for your ZIP, and the listed price is before freight. A crane or a forklift with long forks sets 1,350 pounds on the slab. Fill it to the manway once, hold it, and check the outlet fitting before the pump goes on. Keep the first delivery's paperwork with the tank; strength and date on day one is the baseline for every batch after.