The Enduraplas 6011 Gallon Black Cone Bottom Tank (SKU THC06011B) is a bulk-volume polyethylene cone bottom tank built for full-drain chemical and process service, where emptying clean matters as much as raw storage. At 6,011 gallons in a 144 by 144 inch footprint and 125 inches tall, this black cone tank carries a 1.9 specific gravity rating, meaning the resin and wall thickness are engineered for dense chemical contents, not just water. The black exterior blocks UV and helps suppress algae and light-driven degradation in chemistries that are sensitive to light. The cone-bottom geometry drains toward a single low point, so sediment, slurry, and the last working gallons clear out instead of settling on a flat floor. The 1.9 rating is the heaviest-duty SG tier offered, so for the densest chemistries on this list, like 98% sulfuric acid, this tank already is the upgrade tier.
Will it hold what you're storing?
Sizing and rigging are where a cone tank this size gets decided. Filled with plain water at 1.0 specific gravity, this tank weighs roughly 50,132 pounds full; that is the load your stand, ring, or pad must carry for water service. Because it is rated to 1.9 specific gravity, its maximum rated contents weight runs to about 95,250 pounds when storing dense chemicals. Your foundation, cone stand, and anchoring must be designed for the actual weight of YOUR product at its real specific gravity, not the water number. Run your contents and ZIP through the Tank Sizing Calculator and review the Tank Sizing Guide before you finalize a stand, then check our Cone Bottom Tank Stand Compatibility Matrix for Enduraplas-specific stand guidance. Refer to the technical drawing on this page for the cone angle, fitting locations, and overall dimensions.
Chemical compatibility
This is a polyethylene cone bottom tank rated at 1.9 specific gravity. The resin reads as HDLPE but is unconfirmed; confirm HDLPE versus XLPE with us before you order for chemical service, because crosslinked and linear polyethylene behave differently under certain chemicals, and on heavy-duty services like hydrofluoric or sulfuric acid that distinction is decision-critical. This listing carries no factory fitting schedule; fittings are spec'd to order per chemical, using the fitting and gasket materials in the table below, so the connections last as long as the shell. Compatibility is drawn from the OEM chemical-resistance chart, which is concentration- and temperature-specific; always match your exact concentration and operating temperature before ordering.
Verified compatible chemistries for this tank include Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS, EPDM), Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Magnesium Chloride (30%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Phosphoric Acid (85%, PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (under 16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Sulfuric Acid (98%, CPVC, Viton), Urea Solution (50%, PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). For full concentration and temperature limits across these and other chemistries, work through our Chemical Compatibility Database.
The mistake to avoid
The two costliest errors on a cone tank this size are gasket mismatch and fitting metallurgy. Watch the exceptions to a default EPDM/PVC kit: Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Phosphoric Acid, Sodium Hypochlorite, and Sulfuric Acid all call for Viton gaskets; Peracetic Acid needs Aflas; Sulfuric Acid at 98% needs CPVC fittings; and DEF, Peracetic Acid, Propylene Glycol, and Zinc Orthophosphate call for 316 stainless or specific plastic fittings. A default EPDM/PVC nozzle kit will fail prematurely on those services. Plan your top penetrations deliberately so fill, vent, level, and drain do not conflict; our guides on tank top fitting placement, tank level gauge selection, and hazard labeling and signage compliance walk through the decisions that keep a bulk chemical install safe and inspection-ready.
This tank ships LTL freight from the nearest Enduraplas plant, Converse, TX or Neche, ND, with freight quoted live to your ZIP. The dual-origin advantage matters on a load this heavy: depending on your region, a TX or ND origin can materially change the LTL number, so run both through our Freight Cost Estimator to compare. Or call 866-418-1777 to talk through stand options, fitting packages, and rigging for a tank this size. Confirm your exact chemical, concentration, temperature, and the HDLPE versus XLPE resin question with us before you order.
