Snyder Industries 3650 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

Twenty-nine tons of chemical under ten and a half feet

A 1.9 specific gravity wall is sized for a liquid nearly twice as dense as water, and 973 pounds of resin is what that takes on this shell, 193 pounds more than the 1.5 wall in the same mold and the heaviest wall in 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, which is large for a dense chemical, is accounted for. Full, it puts 57,838 pounds on a 102 inch circle at the rating: a slab designed for the load and in contact with the whole floor, as the concrete pad sizing guide, inside a berm sized to the tank, with the empty tank strapped against wind. The tank sizing calculator turns feed rate and delivery interval into a volume, and the tank sizing guide covers the reserve.

Grades on the 102 x 126 inch tank, and the sizes beside it

The N43 is the 1.5 wall in this same shell, 193 pounds lighter, for coagulants and brines that never approach this density; the C26 and C37 are the general grades and the C26-BLACK the black one for sun. The 5190000N40 stands 3,900 gallons of cross-linked resin on a 90 inch base at 163 inches for a smaller pad, and the 32288 is the water tank at 3,500 gallons on a 96 inch base.

Need a different size? Every tank in the table is in stock programs; call 866-418-1777.

Ports and access

• Access: 18 inch threaded, vented manway, 126 inches up; vent outside on acid and caustic service, fill through a dip tube, and size the vent for the delivery pump.
• Outlet: tell us the chemical when ordering and the bulkhead fitting is matched to it; a flanged transition, an expansion joint, and a valve supported off the slab.
• Service limit: 120 F.

A sender matched to the chemical, read at ground level, means nobody goes up for a reading; a closed manway keeps the vapor in, and a light-sensitive chemical gets shade. Regulated chemical in a single wall tank means a berm sized to the tank around it. Label it so the fire inspector and the workplace inspector read the same thing. Where it freezes, insulate or drain the outlet valve and the first length of pipe.

Receiving a delivery

A delivery truck's pump can push air out faster than a stock vent can pass it, so the vent is sized for the unload rate or the fill goes through a dedicated top bulkhead with its own vent line. A fill pipe to the floor keeps caustic or coagulant from free-falling and foaming. A dense liquid heats when water is added to it, so a batch tank is filled with water before the chemical, never after. The first delivery into a new tank is watched from start to finish, with the slab edge and the outlet fitting checked as the level climbs, and each delivery after it is logged with its date and strength.

Typical duty

Ferric and other dense coagulants at a plant with a berm, acid feed for pH control, heavy brine at plant scale, dense process chemicals delivered by partial tanker, and water where the buyer wants the heaviest wall, including a fire reserve of the kind the fire-water reservoir design guide describes. A single chemical per tank, labeled once for both inspectors.

Freight to your ZIP

At 102 inches across and 126 inches long on the deck the 8190000N45 ships as oversize freight at a lane rate rather than a class rate; the freight cost estimator prices it for your ZIP, and the listed price is before freight. A forklift with long forks sets 973 pounds on the slab. Water-fill it once to the manway, hold it, then drain and dry before the chemical connection is made. Keep the first delivery's paperwork with the tank; strength and date on day one is the baseline for every batch after.