Polypropylene Tanks
Built for Heat, Built for Aggressive Duty
When heat, oxidizers, and caustics push HDPE and XLPE past their limits, James specs extrusion-wound polypropylene. Walls up to 3.5", service temps to 200°F water / 180°F chemicals, and chemical immunity from pH 0–14.
By James Riggins, Lead Engineer, Liberty Chemical & Equipment Supply, Inc.
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →The Case for Polypropylene
Polypropylene is not a commodity tank material. James only specs PP when failure with HDPE, XLPE, steel, or FRP would be catastrophic — high temperature, aggressive chemistry, or both. Extrusion-wound structure means solid walls up to 3.5" thick with no “elephant's foot” bulging from frequent fill-and-drain cycles, and weldable walls that can be modified or repaired in the field instead of scrapping the tank.
- High-Temp Performance: ~200°F Water / 180°F Chemicals
- Chemical Immunity Across Full pH Spectrum (0–14)
- Extrusion-Wound — No “Elephant's Foot” Bulging
- 20–30+ Year Life, Field-Weldable & Repairable
Polypropylene tank lines LibertyCES specifies
2 published product lines from 1 manufacturer, from 50 to 30,000 gallons (189–113,562 L). Each row links to the manufacturer document it comes from. For a specific capacity, use the tank size finder.
| Manufacturer & line | Capacity | Material | Rated SG | Temperature | Source document |
|---|---|---|---|---|---|
| Houston PolyTank Vertical Cylindrical Tank | 50–30,000 gal 189–113,562 L | PP or HDPE | HDPE up to 120F; PP up to 180F chemical / 200F water-air | Houston PolyTank product catalog, pp. 4-8 | |
| Houston PolyTank Patented Extrusion-Wound Rectangular Tank | up to 18,000 gal 68,137 L | PP or HDPE | Houston PolyTank product catalog, pp. 9-10 |
Frequently Asked Questions
When should I use polypropylene instead of HDPE for chemical storage?
When heat, oxidizers, or caustics push HDPE and XLPE past their limits — polypropylene handles up to 200°F for water and 180°F for aggressive chemicals across the full pH 0–14 range.
How thick are polypropylene tank walls?
Extrusion-wound polypropylene tanks can have solid walls up to 3.5" thick, eliminating the "elephant's foot" bulging seen in thinner roto-molded designs.
Can polypropylene tanks be repaired instead of replaced?
Yes — polypropylene's weldable walls can be modified or repaired in the field instead of scrapping the tank, contributing to a 20–30+ year service life.
Get your tank spec'd against real chemistry, not guesswork
Send LibertyCES the chemical, concentration, temperature, and duty cycle — we'll help match resin, wall thickness, fittings, and containment.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].
Related Guides & Products
Send James your spec
Fluid, concentration, temperature, flow or volume, and where it goes. James replies with a real answer, not a catalog page.
Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated