The Norwesco 7500 Gallon 30 Degree Plastic Vertical Cone Bottom Tank is a full-drain processing vessel built for industrial chemical handling where you need every gallon out of the bottom. This Norwesco cone bottom tank is molded in blue polyethylene with a 1.9 specific gravity rating, stands 149 inches tall on a 141 x 141 inch footprint, and uses a 30 degree cone to keep heavy slurries and settling chemicals moving toward the outlet instead of pooling on a flat floor. The 1.9 SG rating is the headline spec: it is the highest specific-gravity rating Norwesco offers in this 7500-gallon cone bottom geometry, so there is no heavier-rated upgrade to go hunting for. It is engineered to carry dense liquids that would over-stress a standard 1.5 SG vertical tank.
Will it work for your job?
Sizing is where most cone bottom buyers get surprised, so plan around the loaded weight, not the empty shell. At 7500 gallons of water this tank carries roughly 62,550 lb, and at its maximum rated contents it carries up to 118,845 lb. That figure assumes the full 1.9 specific gravity load. Your support stand, foundation pad, and anchoring all have to be rated for the loaded weight of the actual chemical you are storing, and a cone bottom tank must sit in a matching steel stand because the cone carries no weight on the ground. This tank is molded at three Norwesco plants (Shawnee, OK; St. Bonifacius, MN; and Washington Court House, OH), and freight is quoted from whichever is closest to your ZIP. Run your dimensions and contents through the Tank Sizing Calculator or read the Tank Sizing Guide before you commit to a pad. Two guides are worth a read first: the 7500 Gallon 30 Degree Cone Bottom Tank buyer's guide and the 15-degree vs 30-degree vs 45-degree cone selection guide, plus the stand compatibility matrix so the tank and stand are matched as a set. Outlet and fitting configuration is confirmed at the time of order, so call us with your plumbing layout rather than assuming a port size.
Chemical compatibility
This tank is molded in polyethylene with a 1.9 specific gravity rating. The resin grade is recorded in our system as HDLPE but is unconfirmed, so confirm HDLPE versus XLPE with us before you put it into chemical service, since crosslinked and linear polyethylene behave differently with some chemistries. The fitting and gasket pairings below come straight from the OEM chemical-resistance chart and are concentration- and temperature-specific, so match them to your actual service conditions. Stainless-only services: DEF at 32.5% and Peracetic Acid at 30% require 316 stainless fittings (EPDM and Aflas gaskets respectively), and Propylene Glycol and Zinc Orthophosphate call for PP/316SS with EPDM. Do not run PVC or plastic fittings on those services. At 1.9 SG this tank also handles dense acids and concentrated solutions that lighter tanks cannot: Sulfuric Acid at 98% (CPVC fittings, Viton gaskets), Phosphoric Acid at 85% (PVC, Viton), Hydrochloric Acid at 37% (PVC, Viton), Hydrofluoric Acid at 48% and Hydrofluosilicic Acid at 26% (PP/PVC, Viton), Hydrogen Peroxide at 50% and Sodium Hypochlorite under 16.5% (PVC, Viton), Acetic Acid at 60% (PP/PVC, EPDM), Ferric Chloride and Ferric Sulfate at 50% and 60% (PVC, EPDM), Ferrous Sulfate at 20%, Aluminum Sulfate at 50%, Calcium Chloride at 40%, Magnesium Chloride at 30%, Sodium Carbonate at 30%, Potassium Carbonate at 50%, Potassium Hydroxide (saturated), Sodium Thiosulfate at 40%, Polyaluminum Chloride, Sodium Bisulfate, and Sodium Bisulfite (PVC or PP, EPDM). Water-treatment and fluid operations are covered too: Urea Solution at 50% (PP/PVC, EPDM), Ethylene Glycol at 100% (PVC, EPDM), and Ozonated Water up to 10 PPM (PVC, EPDM). Confirm every pairing against the concentration- and temperature-specific OEM chart and our Chemical Compatibility Database; see individual pages such as sulfuric acid, sodium hypochlorite, DEF, and hydrofluoric acid for details.
The mistake to avoid
The most expensive error on a high-SG cone bottom tank is ordering the wrong fitting or gasket material for your concentration. The chemicals on this list split between Viton, EPDM, Aflas, and the harsher services that demand 316 stainless or CPVC fittings, and using EPDM where Viton is required, or PVC where 316 stainless is required, will fail fast. The second mistake is mounting: do not put a cone bottom tank on a flat pad. It needs a steel stand rated for the full loaded weight, and the elevation has to clear your drain plumbing. Confirm the resin type, the exact concentration, and your stand rating before you order.
This tank ships LTL freight, quoted live to your ZIP, from the nearest Norwesco plant to you among Shawnee, OK; St. Bonifacius, MN; and Washington Court House, OH. Get a freight estimate with our Freight Cost Estimator or call 866-418-1777 to talk through stand pairing, fitting layout, and the right tank for your chemical. Listed before freight.
