SAFE-Tank® Double Wall Tank System
Secondary containment: SAFE-Tank® if concrete containment is not available.
Alternative: PPC secondary containment basis or other secondary containment suitable for chemical, of adequate size for use
Hydrofluoric Acid
Reducing the risk of human exposure
Used in the production of aluminum, fluorocarbons and gasoline and for applications like glass etching and uranium processing, hydrofluoric acid is an extremely dangerous chemical that must be handled with the utmost care.
This corrosive liquid penetrates tissue more quickly than typical acids. Toxicity can occur through dermal, ocular, inhalation and oral routes.
Since HF alters nerve function, accidental exposure can go unnoticed by the victim, delaying treatment and increasing the extent of injury.
It can also be absorbed by the blood through the skin, reacting with blood calcium and potentially causing a heart attack.
The extreme nature of this chemical calls for superior structural integrity – the level of integrity Poly Processing is known for.
The Poly Processing Hydrofluoric Acid System
When people’s lives are at risk, you can take no chances. You need a system that goes above and beyond to prevent contact with this corrosive acid. That system starts with a crosslinked polyethylene tank. XLPE is a thermoset resin that gives customers 20 times the environmental stress-crack resistance, 10 times the molecular weight and 5 times the impact and tensile strength of HDPE. This system carries a warranty for a full five years.
A SAFE-Tank® can help reduce health and environmental concerns due to closed containment of hydrofluoric acid.
If a SAFE-Tank® is not a possibility, an IMFO® flange can be used to reduce hands-on maintenance, thereby reducing the risk to your employees.
For additional information on storing hydrofluoric acid, including recommended storage tanks and components, download our Hydrofluoric Acid Guide below. Or, download the Tank Designs & Specifications Guide to see all of our chemical storage products.
| Chemical | Resin Type | Specific Gravity Rating | Fitting Material | Gasket Material | Bolt Material |
|---|---|---|---|---|---|
| Hydrofluoric Acid | XLPE | 1.9 | PP | Viton® | C-276 |
Tank Specifications
Tank options include:
High-density crosslinked polyethylene (XLPE) construction for maximum strength
OR-1000™ antioxidant inner surface
Integrally Molded Flanged Outlet (IMFO®) for complete drainage
SAFE-Tank® design for "tank-within-a-tank" protection
Recommended System Components
IMFO® Fittings
Fittings: IMFO® eliminates the need for confined space entry.
PTFE Expansion Joint
Plumbing: Requires flexible connections to allow for lateral and vertical tank contraction and expansion, and to reduce vibration stress.
SAFE-Tank® Double Wall Tank System
Venting: SAFE-Surge® manway cover is recommended on pneumatically loaded systems to support tank longevity.
Technical Overview
IMFO® Vertical Flat Bottom of XLPE:
230–13,650 gallons
1.9 spg rating
Non -IMFO® alternatives :
SAFE-Tank® XLPE:
55–8,700 gallons
1.9 spg rating for primary tank
Spg ratings for secondary tanks ≥ 3,000 gallons may be equal to or 1 less spg than primary tank.
All other tank sizes must equal primary tank spg rating.
Standard Vertical Flat Bottom XLPE:
30–13,650 gallons
Alternative secondary containment: PPC secondary containment basin or other secondary containment suitable for hydrofluoric acid, of adequate size for use
Plumbing: Requires use of flexible connections with fittings on lower third of sidewall. See Fittings & Accessories for flexible connections options.
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Expansion joints must meet the following minimum requirements:
- Axial Compression ≥ .67˝
- Axial Extension ≥ 0.67˝
- Lateral Deflection ≥ 0.51
- Angular Deflection ≥ 14°
- Torsional Rotation ≥ 4°
Venting: See Venting Chart
Foundation: PPC IMFO® tank pad or smooth concrete, asphalt or steel foundation designed to accommodate IMFO®, SAFE-Tank® or vertical tank
Temperature: Product should not exceed 100°F at delivery or during storage to maintain ASTM D1998 design parameters.
Lid: Fume-tight manway cover to manage release of chemical gases
Options: Restraint systems for wind and seismic, level gauges, ladders, heating pads, insulation, mixer mounts and engineering stamp