The Snyder Industries 8700 Gallon HDLPE Vertical Double Wall Liquid Chemical Storage Tank is built for high-density chemical service, carrying a 1.9 specific gravity rating in High Density Linear Polyethylene. The integral double-wall design places a primary tank inside a secondary containment shell, giving you built-in spill protection for aggressive liquids without pouring a separate berm. At 197 inches tall on a 142 x 142 inch footprint, this is a large vertical storage tank engineered for serious volume.
Will it work for your chemical?
This Snyder double wall tank holds a nominal 8,700 gallons and stands 197 in tall, 142 in wide, and 142 in deep. The 1.9 SG rating means it is built to carry liquids substantially heavier than water - full of water it weighs about 72,558 lb, and at its maximum rated contents it carries up to 137,860 lb. Note that 8,700 gallons is the nominal shell volume, not your usable fill: once you size freeboard for thermal expansion and the higher density of a 1.9 SG liquid, your working volume is lower (see the freeboard guide below). Plan your pad, anchoring, and forklift or crane access around those numbers; use our Tank Sizing Calculator and the Tank Sizing Guide to confirm the size and weight match your site before you order. The technical drawing on this page shows the fitting layout: a flange, an 18" threaded/vented fitting, and a manway with 15" access. In practice the 18" threaded/vented fitting is your fill and vent path - important for off-gassing oxidizers like sodium hypochlorite and hydrogen peroxide - while the 15" manway access supports inspection and entry on the primary tank.
Chemical compatibility
This tank is molded from HDLPE and rated to 1.9 specific gravity. That rating covers every chemical listed here with margin, including 98% sulfuric acid, which is the heaviest in the set. Always match your fitting and gasket materials to the chemical you are storing, and confirm every selection against the OEM chemical-resistance chart, which is concentration- and temperature-specific. Before you commit to a long EPDM list, note the gasket exceptions: peracetic acid (30%) needs Aflas, and the strong oxidizers and acids - sodium hypochlorite, hydrogen peroxide, phosphoric acid, and sulfuric acid - all require Viton, not the EPDM default. The full compatible set at the listed concentrations:
- 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 (<16.5%) - PVC fittings, Viton gaskets
- 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
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets (consult the database for ozone PPM limits)
The common mistake on a tank this size is matching the resin correctly but pairing it with an EPDM gasket on a Viton-grade chemical. Verify each fitting and gasket against the Chemical Compatibility Database for your exact concentration and temperature.
Double-wall containment and freeboard
Because this is a double wall tank, the secondary shell is your last line of defense, not a reason to skip level safeguards. Size your freeboard for thermal expansion and the chemical's density, plan your high-level alarm and cutoff architecture, and select the right level gauge for the medium. Our walkthroughs on Snyder Captor double-wall tanks and SPCC 40 CFR 112 compliance, freeboard sizing per ASTM D1998, level gauge selection for chemical service, and spillover redundancy engineering cover the design discipline behind a safe loadout.
This vertical storage tank ships LTL freight from the Snyder plant in Lincoln, NE, quoted live to your ZIP. Full of water it weighs about 72,558 lb and at maximum rated contents up to 137,860 lb, and it stands 197 inches tall, so delivery and offloading need to be planned ahead - get an exact rate with our Freight Cost Estimator or call 866-418-1777 and we will quote the haul to your dock.
