Flat Bottom Chemical Storage Tanks
50–50,000 Gallons
A commodity tank gives you the lowest cost-per-gallon. A James Riggins–spec'd system gives you the lowest cost-of-ownership. We match resin, wall thickness, fittings, and controls to your exact chemistry, temperature, and duty cycle for a 20+ year life — with zero spec failures.
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 →Design Note: Stop “Elephant Feet” Bulging Before It Starts
Flat bottom tanks see the highest stress where the sidewall meets the floor. Thin roto-mold tanks can bow outward — known as “elephant feet” — especially with heat and high specific gravity. James' approach: specify the right resin (HDPE/XLPE/PP), wall thickness, and supports, then integrate containment and controls so operators get a system that stays straight and compliant for decades.
- Correct Resin & SG Rating
- Thicker or Extrusion-Wound Walls
- Seismic Anchoring Considered
- Fitting Layout & Support
Spec-Ready Flat Bottom Chemical Storage Tanks Suppliers
Liberty works with proven manufacturers to match your exact duty cycle.
Houston PolyTank (HPT)
Best For: Aggressive chem & high temp · Material: Extrusion-wound PP/HDPE · Feature: Rigid walls, no “elephant feet” · Temp: PP to 200°F (water) / 180°F (chem) · Capacities: 50–50,000 gal
Snyder Industries
Standards: ASTM D1998 · Materials: HDLPE / XLPE · SG Ratings: 1.35 · 1.5 · 1.9
Ace Roto-Mold (Den Hartog)
Types: Vertical & batch tanks · SG: Up to 2.0 (smaller units) · Standards: ASTM D1998-06 design
Poly Processing
Containment: SAFE-Tank® double-wall systems · Full Drain: IMFO® integrally molded outlet · Offerings: Vertical & sloped-bottom
Frequently Asked Questions
What size range do flat bottom chemical storage tanks come in?
Flat bottom tanks are commonly available from 50 to 50,000 gallons depending on the manufacturer and resin, with vertical designs reaching the highest capacities.
What causes "elephant feet" bulging in flat bottom tanks?
Flat bottom tanks see the highest stress where the sidewall meets the floor. Thin roto-molded tanks can bow outward — known as elephant feet — especially under heat and high specific gravity without the correct resin, wall thickness, and supports.
Which resin should I use for a flat bottom tank?
HDPE, XLPE, or PP depending on chemistry and temperature — PP handles up to 200°F for water and 180°F for chemicals, while HDPE/XLPE suit a broader range of standard chemical storage at lower temperatures.
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].