Ethylene Glycol Storage — 100% Industrial Coolant Tank Selection

Storing Ethylene Glycol? Start Here

Ethylene glycol is a popular choice for industrial coolants and antifreeze solutions. When considering a storage solution, it's important to focus on thermal management and potential degradation byproducts, especially if storing 100% ethylene glycol or its blends. This chemical, while forgiving in some aspects, does require careful handling to prevent oxidation and acid formation over time.

Can you store it in a poly tank?

Yes, you can store ethylene glycol in high-density polyethylene (HDLPE) or cross-linked polyethylene (XLPE) tanks. Both materials are suitable for 100% ethylene glycol, with a specific gravity rating of 1.9 ASTM. However, ensure the temperature does not exceed 140°F to maintain tank integrity.

Key Issue: Oxidation and Acid Formation

Over time, ethylene glycol can oxidize, forming acids that may corrode metal components. To minimize this, store glycol in tanks with minimal headspace and good seal integrity, especially in warm conditions. Regularly check for any signs of acid build-up.

The safety that actually matters

• Use EPDM gaskets and 316 stainless steel fittings for long-term durability.
• Keep storage temperatures below 140°F to avoid tank wall weakening.
• Ensure tanks are well-sealed to prevent oxidation and acid formation.

Common questions

Can I use the same tank for ethylene and propylene glycol?

Yes, both can be stored in HDLPE/XLPE tanks with EPDM gaskets and 316SS hardware. Just drain the tank between uses to avoid cross-contamination.

How long can I store glycol before it goes bad?

Uninhibited ethylene glycol can last 3-5 years in a sealed tank. Inhibited versions typically last around 2 years due to the degradation of inhibitors.

Is there a freeze concern?

100% ethylene glycol freezes at 10°F. In cold climates, ensure tanks are insulated or heat-traced to keep temperatures above 50°F for ease of pumping.