Ace Roto-Mold (Den Hartog)
Rotationally molded polyethylene tanks, 10 to 15,500 gallons, with a real ~200-chemical resistance chart and quantified ESCR stress-crack methodology.
What LibertyCES specifies from Ace Roto-Mold
A real ~200-chemical resistance chart, tested at multiple concentrations — including the finding that polyethylene itself becomes non-resistant at 98% sulfuric acid.
Patent 9,162,816, EPDM elastic seal standard between primary and secondary tank walls, 16" vented lid standard.
Cross-linked polyethylene construction — the explicit engineered exception to the general "no fuels in polyethylene" rule.
98% sulfuric acid is where polyethylene itself stops being the answer — not the tank brand.
Ace Roto-Mold (Den Hartog) — Real Catalog Spec Data
| Product Line | Model | Category | Material | Size / Capacity | Temp Rating |
|---|---|---|---|---|---|
| Vertical Tanks | Vertical Tanks | Storage Tank | Linear LDPE or HDPE, UV stabilized | 10-15500 gal | SG 1.6-2.0 |
| Gusseted Tanks | Gusseted Tanks | Storage Tank | Linear LDPE or HDPE | 1050-15500 gal | SG 1.5-1.8 |
| Water Only Tanks | Water Only Tanks | Storage Tank | FDA compliant linear LDPE | 2500, 3000 gal | SG 1.0 |
| Free Standing Horizontal Tanks | Free Standing Horizontal without Sump | Storage Tank | Linear LDPE or HDPE | 35-4250 gal | SG 1.7 |
| Free Standing Horizontal Tanks | Free Standing Horizontal with Sump | Storage Tank | Linear LDPE or HDPE | 25-4250 gal | SG 1.7 |
| Round Horizontal Tanks | Round Horizontal Tanks | Storage Tank | Linear LDPE | 25-500 gal | SG 1.7 |
| Elliptical Tanks | Elliptical Tanks | Storage Tank | Linear LDPE | 85-1600 gal | SG 1.7 |
| Cone Bottom Tanks | Cone Bottom Tanks | Storage Tank | Linear LDPE or HDPE | 150-12500 gal | SG 1.7-2.0 |
| Cone Bottom Tanks - Open Top | Cone Bottom Open Top Tanks | Storage Tank | Linear LDPE or HDPE | 840-2610 gal | SG 1.7 |
| Inductor Tanks | Inductor Tanks | Storage Tank | Linear LDPE | 7-110 gal | SG 1.7-2.0 |
| Blow Mold Inductor Tank Sets | Blow Mold Inductor Tank Set w/ PE Legs | Storage Tank System | HDPE | 10-60 gal | SG 1.7 |
| Vertical and Cone Bottom Batch Tanks | Batch Tanks | Storage Tank | Linear LDPE | 55-325 gal | SG 2.0 |
| Containment Tanks - Open Top | Open Top Containment Tanks | Containment Basin | Linear LDPE or HDPE | 2-6800 gal | SG 1.7-2.0 |
| Dualline Double Wall Tanks | Dualline Double Wall Tanks | Dual Containment Tank | Polyethylene, EPDM elastic seal | 65-6500 gal | SG 1.7-2.0 |
| Fuel Tanks | Fuel Tanks | Storage Tank | XLPE | 6, 12 gal | SG 1.75, rated for gasoline/diesel |
Sourced from Ace Roto-Mold (Den Hartog)'s own catalog documentation.
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Frequently Asked Questions
At what sulfuric acid concentration does polyethylene fail?
Ace Roto-Mold's own chemical resistance chart rates polyethylene as chemically "Not Resistant" at 98% concentration and in fuming form — a concentration-driven material failure independent of temperature, more precise than a simple temperature-ceiling framing.
What is ESCR and why does it matter for a chemically "resistant" tank?
Environmental Stress Crack Resistance (ESCR) is a mechanically distinct failure mode from chemical dissolution — a chemical can rate "Resistant" on the compatibility chart and still cause stress cracking at fittings, bands, and tie-down lugs under mechanical load and elevated temperature.
Can polyethylene tanks store fuel?
Standard LPE tanks are not recommended for fuels or solvents, but Ace Roto-Mold's dedicated Fuel Tanks (6 and 12 gallon) use cross-linked XLPE construction specifically engineered and rated for gasoline/diesel contact — construction type, not the polyethylene family broadly, determines fuel compatibility.
Get the right tank resin and capacity for your chemistry
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].