The Snyder Industries 360 Gallon Sulfuric Acid Double Wall Tank is a secondary-contained polyethylene vessel built for high-density chemical service. It holds 360 gallons in a double wall configuration and stands 63 inches tall on a 53 x 53 inch footprint, so it drops into a compact containment area without a separate poured berm. The tank is molded in opaque white HDLPE (resin #880046) and carries a 1.9 specific gravity rating, which is what lets it hold a fluid as dense as concentrated sulfuric acid instead of a standard water-weight tank.
Will it work for your application
Start with weight, because that is where sizing goes wrong on a double wall acid tank. Filled with water this vessel weighs about 3,002 pounds, but its maximum rated contents weight is 5,705 pounds — that higher figure reflects the 1.9 SG rating and is the number your pad and forklift capacity have to respect. Concentrated sulfuric acid runs close to that 1.9 rating, so an actual acid fill sits near the rated maximum with little headroom to spare. Size the slab, anchors, and material handling to the full 5,705 pound figure, not the water weight. The integrated outer wall provides secondary containment around the inner tank; before you build it into an SPCC or 40 CFR 112 plan, confirm the captured volume meets your 110 percent containment rule for this specific fill. If you are still choosing a size, run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide.
Specific gravity is the mistake to avoid
The most common error with acid tanks is matching capacity while ignoring specific gravity. A 360 gallon water tank and this 360 gallon acid tank look interchangeable on a spec sheet, but only the 1.9 SG-rated shell is engineered to carry the hydrostatic load of concentrated sulfuric acid over its service life. Do not substitute a lower-rated double wall tank to shave freight or price — the wall thickness and rated contents weight are the entire reason this model exists. For the containment side of the equation, our walkthroughs on Snyder Captor double-wall tanks for SPCC 40 CFR 112 compliance and freeboard sizing per ASTM D1998 cover freeboard, thermal expansion, and the real usable volume you can count on.
Fittings and site preparation
This tank does not ship with a fixed fitting package. Fittings and gaskets are configured to order so the outlet, bulkhead, and vent materials match your acid concentration and operating temperature — call 866-418-1777 and we will spec them with you before the tank is built. On the foundation, concentrated acid at the rated contents weight puts real load on the base, so the full 53 x 53 inch footprint should bear evenly on a rigid, level slab with no point loading under the outer wall. Our guide on concrete pad sizing for above-ground polyethylene tanks lays out the ACI 360R-10 framework for getting that pad right before delivery.
This double wall tank ships by LTL freight from the Snyder plant in Marked Tree, Arkansas, quoted live to your ZIP. Get a freight number to your ZIP in seconds with the Freight Cost Estimator, or call 866-418-1777 and we will confirm fittings, containment layout, and the acid-service details before you order.
