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.
Ace Roto-Mold (Den Hartog) makes rotationally molded polyethylene tanks: vertical and cone bottom tanks from 10 to 15,500 gallons, Dualline double wall tanks from 65 to 6,500 gallons, and 6 and 12 gallon XLPE fuel tanks. Its resistance chart covers about 200 chemicals and shows polyethylene is not resistant to 98% sulfuric acid. ESCR cracking is a separate failure mode.
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.
Related Manufacturers & Products
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].
Ace Roto-Mold (Den Hartog) models in the LibertyCES catalog
31 models across 29 product lines.
| Model / line | Type | Size / capacity / flow | Pressure | Temperature | Wetted material | Source |
|---|---|---|---|---|---|---|
| Vertical Tanks Vertical Tanks | Storage Tank | 10–15,500 gal (38–58,674 L) | SG 1.6-2.0 | Linear LDPE or HDPE, UV stabilized | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Gusseted Tanks Gusseted Tanks | Storage Tank | 1,050–15,500 gal (3,975–58,674 L) | SG 1.5-1.8 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Water Only Tanks Water Only Tanks | Storage Tank | 3,000 gal (11,356 L) | SG 1.0 | FDA compliant linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Free Standing Horizontal Tanks Free Standing Horizontal without Sump | Storage Tank | 35–4,250 gal (132–16,088 L) | SG 1.7 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Free Standing Horizontal Tanks Free Standing Horizontal with Sump | Storage Tank | 25–4,250 gal (95–16,088 L) | SG 1.7 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Round Horizontal Tanks Round Horizontal Tanks | Storage Tank | 25–500 gal (95–1,893 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Elliptical Tanks Elliptical Tanks | Storage Tank | 85–1,600 gal (322–6,057 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Cone Bottom Tanks Cone Bottom Tanks | Storage Tank | 150–12,500 gal (568–47,318 L) | SG 1.7-2.0 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Cone Bottom Tanks - Open Top Cone Bottom Open Top Tanks | Storage Tank | 840–2,610 gal (3,180–9,880 L) | SG 1.7 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Inductor Tanks Inductor Tanks | Storage Tank | 7–110 gal (26–416 L) | SG 1.7-2.0 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Blow Mold Inductor Tank Sets Blow Mold Inductor Tank Set w/ PE Legs | Storage Tank System | 10–60 gal (38–227 L) | SG 1.7 | HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Vertical and Cone Bottom Batch Tanks Batch Tanks | Storage Tank | 55–325 gal (208–1,230 L) | SG 2.0 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Containment Tanks - Open Top Open Top Containment Tanks | Containment Basin | 2–6,800 gal (8–25,741 L) | SG 1.7-2.0 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Dualline Double Wall Tanks Dualline Double Wall Tanks | Dual Containment Tank | 65–6,500 gal (246–24,605 L) | SG 1.7-2.0 | Polyethylene, EPDM elastic seal | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Fuel Tanks Fuel Tanks | Storage Tank | 12 gal (45 L) | SG 1.75, rated for gasoline/diesel | XLPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Stock Tanks Stock Tanks | Storage Tank | 50–920 gal (189–3,483 L) | SG 1.0 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Pickup Tanks Pickup Tanks | Storage Tank | 100–450 gal (379–1,703 L) | SG 1.5 std, to 1.7 | Linear LDPE or HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Crop Care Tanks Crop Care Tanks | Storage Tank | 500–1,500 gal (1,893–5,678 L) | SG 1.9 | HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Utility Tanks - Flat Bottom Utility Tanks Flat Bottom | Storage Tank | 26–200 gal (98–757 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Utility Tanks - Slim-Line Utility Tanks Slim-Line | Storage Tank | 130–1,000 gal (492–3,785 L) | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | ||
| Low Profile Rectangle Tanks Low Profile Rectangle Tanks | Storage Tank | 50–500 gal (189–1,893 L) | n/a | Ace Roto-Mold — General Product Catalog (Nov 2025) | ||
| Spot Sprayers Spot Sprayers Roto-Molded | Storage Tank | 14–25 gal (53–95 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Spot Sprayers Spot Sprayers Blow Molded | Storage Tank | 15–60 gal (57–227 L) | SG 1.7 | HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| PCO Tanks PCO Tanks | Storage Tank | 35–300 gal (132–1,136 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Septic Tanks Septic Tanks | Wastewater Tank | 300–1,500 gal (1,136–5,678 L) | IAPMO/ANSI Z1000-2019, CSA B66:21 tested | HDPE, some reclaimed PE variants | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Low Profile Septic Tanks Low Profile Septic Tanks | Wastewater Tank | 1,000–1,500 gal (3,785–5,678 L) | sustains 500 PSF to 36in burial depth | HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Cistern Tanks Cistern Tanks | Storage Tank | 325–1,700 gal (1,230–6,435 L) | SG 1.7, burial to 36in | HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Aquifer Low Profile Cistern Tanks Aquifer Low Profile Cistern Tanks | Storage Tank | 1,000–2,500 gal (3,785–9,464 L) | SG 1.7, sustains 400 PSF to 28in burial | FDA compliant HDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Liquid Feeder Tanks Liquid Feeder Tanks | Livestock Equipment | 155-285 gal | SG 1.5 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Pallet Paks Pallet Pak Units | Storage Tank System | 35–300 gal (132–1,136 L) | SG 1.7 | Linear LDPE, metal frame or plastic base | Ace Roto-Mold — General Product Catalog (Nov 2025) | |
| Stackable Totes Stackable Totes | Storage Tank | 35–240 gal (132–908 L) | SG 1.7 | Linear LDPE | Ace Roto-Mold — General Product Catalog (Nov 2025) |
This table is part of the equipment catalog dataset (CSV and JSON).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated