Snyder Industries 4100 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

Thirty-two tons of chemical under a barn eave

Ten feet of base under 100 inches of height is the shape for a low building or an eave, and the shape that needs the least strapping, because 64,969 pounds on a 120 inch circle sits low. A 1.9 specific gravity wall is sized for a liquid nearly twice as dense as water, and 930 pounds of resin is what that takes on this shell, 156 pounds more than the 1.5 wall in the same mold. 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. The floor is wide, so the pad matters more than the height: an engineered slab in full contact under the whole 120 inch circle, per the concrete pad sizing guide, inside a berm sized to the tank, because a tank this wide spans any hollow in a gravel base and cracks there when full. The tank sizing calculator turns feed rate and delivery interval into a volume, and the tank sizing guide covers the reserve.

The low 4,100 pair, and the sizes beside them

The N43 is the 1.5 wall in this same low shell, 156 pounds lighter, for coagulants and brines that never approach this density. The 7360000 tanks stand the same 4,100 gallons on a 102 inch base at 130 inches, 30 inches taller, for a site with height and less floor, and the 7421100 tanks are the other low tanks on this base, 4 inches taller, the N40 in cross-linked resin for oxidizers.

Neighboring size a better fit? Every row links to its own page; freight to your ZIP is quoted on each, or call 866-418-1777.

Outlet and manway

• Access: 18 inch threaded, vented manway, 100 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.

Choose the level sender for the chemical and read it at ground level; keep the manway closed against vapor loss, and shade the tank where the chemical is light-sensitive. A single wall tank of regulated chemical stands inside a berm sized to it, and a berm around a ten foot tank takes floor, so plan it with the pad. 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.

Unloading without a spill

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. Caustic and coagulant foam if they drop through air, so the fill pipe reaches the floor. When a batch is cut with water, the water goes in first and the chemical after, because dilution heats a dense liquid. Watch the first delivery from the first gallon to the last, checking the slab edge and the outlet fitting as the level rises, and every delivery after that goes in the log with a date and a strength.

Who buys this tank

Ferric and other dense coagulants under a low roof with a berm, acid feed for pH control, heavy brine at plant scale, dense process chemicals delivered by partial tanker into a barn or a shed, and water where the buyer wants the heaviest wall and the lowest center of gravity, including a fire reserve of the kind the fire-water reservoir design guide describes. One chemical to a tank, with a label the fire inspector and the workplace inspector both accept.

Delivery day

At 120 inches across the 8200000N45 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 930 pounds on the slab, and the slab is checked flat before the tank lands. Water-fill it once to the manway, hold it, then drain and dry before the chemical connection is made. Once it is full and holding, leave it alone for a day before the plumbing goes on; a settled tank is a quiet one.