Methanol Storage — Industrial Alcohol Tank System Selection

Storing Methanol? Start Here

Methanol is a versatile chemical used in biodiesel production, as a fuel additive, and in various industrial processes. It's a clear, colorless liquid that's highly flammable and toxic, so storing it safely is crucial. Whether you're managing a biodiesel plant or using methanol for other industrial purposes, understanding the storage requirements is key to maintaining safety and compliance.

Can you store it in a poly tank?

Yes, you can store methanol in a polyethylene tank. Polyethylene, including LDPE, MDPE, and HDPE, is resistant to methanol at all practical concentrations and temperatures. However, the main concern is not the chemical compatibility but the flammability and safety requirements for storing methanol.

Key Issue: Flammability and Safety Codes

Methanol's flammability is the primary concern when it comes to storage. It has a low flashpoint, meaning it can ignite at temperatures below typical room temperature. Therefore, installations must comply with fire codes, such as NFPA 30, which dictate the need for secondary containment, proper venting, and grounding to prevent static discharge.

The safety that actually matters

• Ensure secondary containment to manage potential leaks.
• Install emergency relief vents to handle pressure build-up.
• Use static-dissipating materials and grounding to prevent sparks.
• Follow setback requirements to maintain safe distances from buildings and property lines.
• Use explosion-proof electrical equipment near the tank.

Common questions

Can I store methanol in a standard HDPE water tank?

Chemically, yes. However, you must also meet NFPA 30 requirements for flammable liquids, including containment and venting.

What type of gaskets should I use?

Use PTFE or Viton-encapsulated gaskets. Avoid EPDM as methanol can swell it over time.

Is a black tank necessary for outdoor storage?

Yes, a black or UV-stabilized tank is recommended to prevent UV degradation and extend the tank's service life.