Hydrofluoric Acid Storage — 48% HF Tank System Selection

Storing Hydrofluoric Acid? Start Here

Hydrofluoric acid (HF) is a powerful and hazardous chemical used in industries like metal treatment and glass etching. If you're planning to store HF, you need to be aware of its unique dangers. Even though it's a weak acid chemically, HF is extremely aggressive and can cause severe injuries upon contact. Proper storage is critical to ensure safety and compliance.

Can you store it in a poly tank?

Yes, but only in high-density linear polyethylene (HDLPE) tanks. This is one of the few materials that can safely contain HF. Avoid crosslinked polyethylene (XLPE) as HF can penetrate and degrade it. Always use HDLPE with a specific gravity of 1.9 as specified.

Key Issue: Material Compatibility

HF is highly corrosive and requires careful selection of materials for gaskets, bolts, and fittings. Use Viton for gaskets, Hastelloy C-276 for bolts, and polypropylene or PVC for fittings. Avoid using titanium, aluminum, or glass-filled nylon as they are not compatible with HF.

The safety that actually matters

• Install continuous HF vapor monitoring and ensure proper ventilation.
• Have calcium gluconate gel and HF-rated eyewash stations readily available.
• Train all personnel in HF handling and emergency response procedures.
• Ensure secondary containment is HF-resistant, such as HDPE-lined or epoxy-coated materials.

Common questions

Is hydrofluoric acid the same as muriatic acid?

No, they are different. Hydrofluoric acid is HF, a fluoride acid, while muriatic acid is hydrochloric acid (HCl), a chloride acid. HF is much more hazardous.

Can I use the same tank for HF and HCl?

While technically possible, it's not recommended. Dedicated tanks prevent cross-contamination and unexpected reactions.

What if I have a spill?

Apply calcium gluconate to skin immediately, use an eyewash for eye contact, and seek medical help even if there are no immediate symptoms. HF exposure can have delayed effects.