The Snyder Industries 6500 Gallon ASTM XLPE Black Double Wall Tank (SKU 5670000N46) is a crosslinked linear polyethylene (XLPE) black tank built for high-density liquid storage where secondary containment matters. It holds 6,500 gallons in a 120-inch square footprint, stands 199 inches tall (about 16 feet 7 inches), and carries a 1.5 specific gravity rating. The XLPE wall is the load-bearing reason it can hold contents up to 1.5 times the density of water, and the outer secondary-containment wall surrounds the primary tank so a leak stays contained. The opaque black construction holds up to outdoor sunlight and long-service installations.
Will this XLPE double wall tank work for your site?
Plan your foundation and rigging around real loaded weights, not the empty shell. Filled with water, this tank weighs 54,210 lb; at its maximum 1.5 SG rating it carries up to 81,315 lb of contents. The 120.0 x 120.0 inch footprint has to sit on a fully engineered pad rated for that load, and you need roughly 16 feet 7 inches of vertical clearance to set and vent it, so check your roofline or rigging envelope before delivery. Outfitted with a flange, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for interior entry and inspection, this is a serious containment unit. Confirm the bolt pattern and gasket sizing for the flange and manway against the technical drawing on this page before you order mating hardware or set anchors. If you are still deciding on capacity or comparing footprints, run the numbers through our Tank Sizing Calculator and review the Tank Sizing Guide.
Double wall sizing and freeboard
A double wall tank behaves differently than a single wall vertical when it comes to usable volume and freeboard. Thermal expansion and contents density both eat into the volume you can actually fill, and ASTM D1998 sizing logic governs how the wall thickness is distributed. Two guides are worth reading before you finalize this purchase: Snyder Captor double-wall freeboard sizing per ASTM D1998 and HDPE tank wall thickness at the vapor-saturated headspace. If this tank is destined for rural fire-water reservoir duty, the fire-water reservoir design guide walks through NFPA 22 sizing and freeze protection for cold-climate service. For containment operators, the cathodic disbondment testing guide covers the interstitial-space boundary conditions on double wall designs.
The mistake to avoid
Do not size the pad or the rigging around the water-full number when your contents are denser than water. This is a 1.5 SG tank rated to carry 81,315 lb of contents. If your product runs heavier than water, size your foundation, anchoring, and crane to the maximum rated load, not the 54,210 lb water figure. Since 1.5 SG is the top rating this tank offers, verify your contents density against that 1.5 figure before ordering so you are not asking the wall to carry more than it is rated for.
This XLPE double wall tank ships LTL freight from the Snyder plant in Lincoln, NE, quoted live to your ZIP code. Get an instant number with our Freight Cost Estimator, or call 866-418-1777 for help matching the right double wall tank to your site and confirming freight to your delivery address.
