Snyder Industries 6600 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

The heaviest wall on the ten foot base

A 1.9 specific gravity wall is sized for a liquid nearly twice as dense as water, and 2,100 pounds of resin is what that takes at 6,600 gallons, 200 pounds more than the 1.5 wall in the same mold and the most resin Snyder puts on this base. The certification is against ASTM D1998; the HDPE tank wall thickness guide explains the sizing logic and why the headspace is where a wall ages. Full, it puts 104,584 pounds on a 120 inch circle at the rating: an engineered slab bearing under the entire floor, sized by the concrete pad sizing guide, inside a berm sized to the tank, the empty shell strapped for wind and the manway reached by a fixed platform with a rail. The tank sizing calculator sizes the volume to feed rate and delivery interval, and the tank sizing guide covers the reserve, which for a dense chemical includes freeboard for thermal expansion.

Grades on the 120 x 158 inch tank, and the sizes beside it

The N43 is the certified 1.5 wall in this shell for coagulants and brines that never approach this density; the N42 is the heavy cross-linked tank at this tank's weight for the densest oxidizers, and the N40 and N46 the lighter cross-linked and linear grades. The 7140000 tanks hold 6,500 gallons on this base 5 inches lower, the N45 the same certified 1.9 wall in a lighter shell, and the 7140000C26 holds 6,900 in the general grade.

Still deciding between these? Freight to your ZIP often settles it; the wider tanks ship differently. Or call 866-418-1777 and we will walk the table with you.

Access and outlet

• Access: 18 inch threaded, vented manway, 158 inches up; vent outside on acid and caustic service, fill through a dip tube, and size the vent for a tanker's unload rate.
• Outlet: the bulkhead fitting is chosen for the chemical at order time; a flanged transition, an expansion joint, and a valve supported off the slab.
• Service limit: 120 F / 48 C.
• Snyder line: ASTM.

The level sender is chosen for the chemical and read from the ground, not the platform; keep the manway closed against vapor loss, and shade the tank where the chemical is light-sensitive. For a regulated chemical a single wall tank stands in a berm sized to it. In a freezing climate insulate or drain the outlet valve and the first run of pipe.

Fill day

The truck's pump outruns the manway vent, so size the vent for the unload rate or give the fill its own top bulkhead and vent line. The fill pipe reaches the floor, so caustic or coagulant enters below the surface instead of free-falling and foaming. If the tank is ever used to dilute a batch, water goes in first and the chemical second; the other order boils. Watch the first delivery from the first gallon to the last, checking the slab edge and the outlet fitting as the level rises, and the log takes the date and strength of every load that follows.

Put to use

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 tanker with a reserve, and water where the buyer wants the heaviest certified wall for a long life outdoors, 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.

How it ships

At 120 inches across and 158 inches long on the deck the 5300400N45 is oversize freight (NMFC 156600) on a flatbed at a lane rate; the freight cost estimator prices the move to your ZIP, and the price on this page is before freight. A crane or a forklift with long forks sets 2,100 pounds on the slab. Prove it with water to the manway and a hold, drain and dry it, then make the chemical connection; the certification goes in the project file. A strap that is checked once a season is a strap that holds; put it on the same calendar as the gutters.