Dimethyl Ether (DME) Storage — Liquefied Gas Pressure Vessel Selection

Storing Dimethyl Ether? Start Here

Dimethyl ether (DME) is a colorless gas with a faint ether smell, stored as a liquefied gas under pressure. It's used in various industries, including as a blend with LPG for heating, as an aerosol propellant, and as a renewable diesel substitute. If you're considering storing DME, it's crucial to understand its storage requirements, as it behaves similarly to LPG and requires specific handling due to its flammable nature.

Can you store it in a poly tank?

No, polyethylene tanks are not suitable for storing dimethyl ether. DME requires an ASME-stamped pressure vessel, typically made from carbon steel or stainless steel, depending on the grade and use.

Key Issue: Pressure and Material Compatibility

DME is stored under pressure, similar to LPG, and is aggressive towards many polymers. It requires specific materials like PTFE or Viton for gaskets and seals to prevent damage. Using inappropriate materials can lead to leaks or failures.

The safety that actually matters

• Ensure all storage vessels are ASME-certified pressure vessels.
• Use compatible materials like stainless steel and PTFE for fittings and seals.
• Follow all safety guidelines for handling flammable gases.

Common questions

Can I use a regular LPG tank for DME?

Yes, but ensure the tank is rated for the pressure and material compatibility required for DME.

What happens if I use a polyethylene tank?

Polyethylene tanks are unsuitable and can lead to leaks or catastrophic failure due to pressure and chemical attack.

What safety measures should I take?

Use proper ventilation, follow flammable gas handling protocols, and ensure all equipment is compatible with DME.