Snyder Industries 4400 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

The full-density wall, on the small pad

A 1.9 specific gravity wall is sized for a liquid nearly twice as dense as water, and 1,450 pounds of resin is what that takes on a tank fifteen feet tall, 350 pounds more than the 1.5 wall in this same shell. The tank is designed to ASTM D1998; the HDPE tank wall thickness guide explains the sizing logic and why a wall this tall is inspected from the top, in the headspace, 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 69,722 pounds on a 90 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. The tank sizing calculator sizes the tank from feed rate and delivery interval; the tank sizing guide covers the reserve.

Grades on the 90 x 182 inch tank, and the sizes beside it

The N43 is the 1.5 wall for coagulants and brines that never approach this density, 350 pounds lighter; the N42 is the heavy cross-linked tank at this tank's weight for the densest oxidizers, and the N40 and N46 the lighter grades. The 7421100C34 lays 4,300 gallons down to 104 inches on a 120 inch base, and the 7000400N45 is this same 1.9 wall laid down to 91 inches on a 143 inch base for a low roof.

Pad already poured? Send its size to 866-418-1777 and we will match a row to it.

Outlet and manway

• Access: 18 inch threaded, vented manway, 182 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: order the bulkhead fitting in the material the chemical calls for; 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 cold climate the outlet valve and the first run of pipe are insulated or drained.

Taking a tanker load

A tanker unloads faster than the manway can breathe, so the vent is sized for the pump or the fill takes a dedicated top bulkhead with its own vent. 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.

Who buys this tank

Ferric and other dense coagulants at a plant with a berm and a small pad, acid feed for pH control, heavy brine at plant scale, dense process chemicals by tanker, and water where the buyer wants the heaviest wall, 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 90 inches across and 182 inches long on the deck the 5210000N45 is oversize freight (NMFC 156600) on a flatbed at a lane rate; the freight cost estimator prices the lane to your ZIP; the figure listed here is before freight. A crane sets 1,450 pounds upright on the slab; a forklift unloads it; only a crane stands it. Strap it, water-fill it once to the manway, hold it, then drain and dry before the chemical connection is made. Keep the delivery paperwork with the tank; the serial number on the shell is what a warranty claim starts from.