DVS 2205 Thermoplastic Tank Specifications
German engineering. American manufacturing. Monolithic integrity. Extrusion-wound HDLPE and polypropylene tanks designed for zero specification failure.
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →| Design Standard | DVS 2205 (calculated safety factors for thermoplastic vessels) |
| Capacity Range | 50–50,000 gallons |
| Wall Construction | Up to 6.0" monolithic, tapered wall thickness |
| HDLPE | −40°F to 120°F, pH 0–14 |
| PP | Up to 180–200°F for water/hot acid applications |
Elephant Foot Elimination
Programmable wall thickness (3.5"–6.0" at bottom, tapering to ~1.0" at top) prevents hydrostatic bulging in high-specific-gravity fluids.
Mixer Support
Reinforced top heads support up to 2,000 lbs dynamic mixer load, eliminating the need for external steel infrastructure.
Pressure & Vacuum Tolerance
Engineered ribbing allows continuous operating pressures up to 1.0–2.0 PSI, superior to roto-molded alternatives (~0.36 PSI).
| Feature | HPT Extrusion-Wound | Fiberglass (FRP) | Roto-Molded (PE) |
|---|---|---|---|
| Wall Structure | Monolithic, solid | Layered laminate (acid wicking risk) | Stressed skin (residual tension) |
| Thermal Expansion | Engineered flexibility with expansion joints | Rigid, brittle; prone to flange cracking | Rigid; nozzle shear during temperature swings |
| Failure Mode | Ductile (detectable leaks) | Delamination (sudden strength loss) | Stress cracking (catastrophic rupture) |
| Mixer Support | Direct mount (1 ton) | Requires external bridge | Requires external bridge |
| Service Life | 20+ years | 15–20 years | 3–7 years |
| Repairability | 100% field weldable | Difficult (grinding/resin cure) | Impossible (cross-linked) |
Patent US 10,150,264 fits standard 40' high-cube shipping containers, eliminating wide-load permits and reducing freight costs >80%. Rectangular design increases storage capacity by 20–30% compared to cylindrical tanks within the same footprint. Internal and external extrusion-wound ribbing eliminates need for external steel cages.
Tanks may require specification review if any apply:
- Using standard PE for >160°F sulfuric acid service
- Hard-piping nozzles without flex in high thermal-swing environments
- Relying on roto-molded designs for slurries or high-SG duty (>1.6)
Frequently Asked Questions
What is the difference between extrusion-wound and roto-molded poly tanks?
Extrusion-wound tanks have a monolithic, solid wall structure with a ductile (detectable) failure mode and 20+ year service life. Roto-molded tanks have a stressed skin with residual tension, fail by sudden stress cracking, and typically last only 3–7 years.
Can a standard PE tank be used for hot sulfuric acid service?
No — standard PE is not rated for sulfuric acid service above 160°F. That combination is one of the explicit red-flag indicators requiring specification review before installation.
How much mixer load can these tanks support without external steel?
Up to 2,000 lbs of dynamic mixer load via reinforced top heads, eliminating the need for external steel gantry infrastructure that FRP and roto-molded tanks typically require.
What design standard governs these thermoplastic tank specifications?
DVS 2205, which sets calculated safety factors for thermoplastic vessels, covering HDLPE (−40°F to 120°F, pH 0–14) and PP (up to 180–200°F) construction.
"I don't sell tanks. I engineer sleep." — James Riggins
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