Winterization Filtrate Tank Selection

Storing Winterization Filtrate? Start Here

Winterization filtrate is a key component in cannabis and hemp processing, especially after the cold-ethanol extraction phase. This filtrate, which is rich in cannabinoids, needs careful storage due to its flammable ethanol content and cold temperature requirements. Typically, it's stored in atmospheric tanks made from materials like HDPE or stainless steel, depending on the processing stage and the temperature conditions.

Can you store it in a poly tank?

Yes, but with conditions. HDPE tanks are suitable for ambient temperature storage after the filtrate has been warmed. For colder storage conditions, XLPE tanks are preferred due to their resistance to embrittlement. However, at full cGMP operations, 316L stainless steel is the best choice.

Key Issue: Temperature Sensitivity

Winterization filtrate must be stored at specific temperatures to prevent embrittlement of the tank material. HDPE is fine for ambient conditions, but for colder environments, XLPE is recommended. This ensures the integrity of the tank and the safety of the stored filtrate.

The safety that actually matters

Ensure tanks are grounded and bonded to prevent static discharge.
Use flame arrestors on vents to manage flammable vapors.
Regularly inspect tanks for signs of embrittlement or damage.

Common questions

What is the best material for storing winterization filtrate?: XLPE is ideal for cold storage, while HDPE works for ambient temperatures. 316L stainless steel is preferred for pharmaceutical-grade operations.
Can I use EPDM gaskets with winterization filtrate?: No, EPDM is not compatible with ethanol and will degrade. Use Viton or Kalrez gaskets instead.
How do I prevent tank embrittlement?: Choose the right tank material for your storage temperature and regularly inspect for any signs of damage.