Snyder Industries 1550 Gallon 1.9 S.G. Vertical Double Wall HDLPE Liquid Chemical Storage Tank in White

Containment on the footprint

A single wall tank of regulated chemical needs a berm sized to its volume, and a berm is concrete, a sump, a drain valve that must stay closed, and a rain problem. A double wall tank carries its containment inside the outer shell, so the tank can stand inside an occupied building where a spill must never reach a floor drain; the SPCC 40 CFR 112 compliance walkthrough walks through when a double wall tank stands in for a berm under a spill plan. Below is the resin's rated chemistry; check the liquid at its concentration in the chemical compatibility database, because carrying the weight and resisting the chemical are separate properties of the wall. The 1,550 gallon vertical tank buyers guide compares the single wall tanks at this volume, which is the right comparison only if a berm is already in place. The tank sizing calculator sizes the tank from feed rate and delivery interval; the tank sizing guide covers the reserve to carry between deliveries.

Grades on the 76 x 136 inch double wall, and the low alternative

The N30 is the same shell in the sulfuric acid grade; the N48 is a lighter general grade at 780 pounds. The 5990302N45 puts nearly the same volume under a 77 inch ceiling on a 93 inch base at this tank's weight, with ASTM certification, and the 5570000N48 steps to 2,000 gallons at 103 inches. Tall when the floor decides, low when the ceiling does.

Comparing against another maker? Send the competing spec to 866-418-1777 or a quote request and we will show the differences honestly.

What is fitted, and what is watched

• Access: 18 inch threaded, vented manway on the primary, 136 inches up; vent outside on anything that fumes, fill through a dip tube.
• Outlet: through both walls as one penetration, with the transition carried off the floor; tell us the chemical and the fitting is matched to it.
• Service limit: 120 F / 48 C.

Watch two levels: the primary, with a sender chosen for the chemical per the level gauge selection guide, and the interstice, which is the alarm: a float or conductivity switch, a look through the port each shift, a logged check each week. Anything in the interstice is a primary leak; the tank is taken out of service that day. Nothing is stacked against the outer shell, nothing is bolted through it, and the space is never used to store anything. Strap the empty tank; a 76 inch base under 136 inches of dense liquid has a high center of gravity, and full it loads that circle to 24,561 pounds at the rating.

Turnover and changeover

Fifteen hundred gallons is six totes or a partial tanker, on a schedule set by the feed rate; size the schedule so the tank turns over before the chemical degrades, and for hypochlorite that means small lots often. Fill through a dip tube so caustic or acid does not splash the manway, mount the dosing pump below the outlet so it primes by gravity, and give the vent a line routed away from the pump's electrical gear. When the tank changes product, drain, rinse, drain again, and let it dry before the new fill.

The work it does

Hypochlorite, caustic and coagulant storage at water systems that cannot build a berm, chemical storage inside occupied buildings, and any regulated liquid at a site an inspector visits. One chemical per tank, labeled for both inspectors at once, manway closed against vapor loss.

Freight, in plain terms

At 136 inches long on the deck the 5490000N45 ships as oversize freight (NMFC 156600) at a lane rate; the freight cost estimator prices the lane to your ZIP; the figure listed here is before freight. A forklift with long forks stands 970 pounds on the slab. Fill the primary with water, hold it, and watch the interstice stay dry; then drain and dry it before the chemical arrives. Save the pallet; a tank that ever has to move again is easier to move on it.

Liquids this resin is rated to store

These entries are the manufacturer's ratings for this resin, each with the concentration limit and the fitting and gasket to specify. Your concentration and temperature are confirmed on the chemical page or in the chemical compatibility database before ordering.

• Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
• Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
• Calcium Chloride (40%) - PVC fittings, EPDM gaskets
• DEF (32.5%) - 316SS fittings, EPDM gaskets
• Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
• Ferric Chloride (50%) - PVC fittings, EPDM gaskets
• Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
• Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
• Hydrochloric Acid (37%) - PVC fittings, Viton gaskets
• Hydrofluoric Acid (48%) - PP/PVC fittings, Viton gaskets
• Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
• Hydrogen Peroxide (50%) - PVC fittings, Viton gaskets
• Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
• Peracetic Acid (30%) - 316SS fittings, Aflas gaskets
• Phosphoric Acid (85%) - PVC fittings, Viton gaskets
• Polyaluminum Chloride - PVC fittings, EPDM gaskets
• Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
• Potassium Hydroxide (Saturated) - PVC fittings, EPDM gaskets
• Propylene Glycol - PP/316SS fittings, EPDM gaskets
• Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
• Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
• Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
• Sodium Hypochlorite (
• Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
• Sulfuric Acid (98%) - CPVC fittings, Viton gaskets
• Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
• Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets