Liquid Argon Storage — LAR Cryogenic Tank Selection

Storing Liquid Argon? Start Here

Liquid argon (LAR) is a colorless, cryogenic noble gas commonly used in industries like welding, steel manufacturing, and semiconductor production. It's stored at extremely low temperatures, just slightly warmer than liquid nitrogen. One key safety consideration for LAR is that its vapors are heavier than air, meaning they can pool in low areas, posing an asphyxiation risk. Understanding the storage requirements and safety measures is crucial for anyone handling this gas.

Can you store it in a poly tank?

No, polyethylene tanks are not suitable for storing liquid argon. The extreme cold will cause poly materials to shatter. Instead, use specialized cryogenic tanks made from stainless steel or aluminum alloys designed for such low temperatures.

Key Issue: Vapor Pooling

The most significant safety concern with liquid argon is its tendency to pool in low-lying areas due to its heavier-than-air nature. This can create an asphyxiation hazard in confined spaces, so proper ventilation and monitoring are essential.

The safety that actually matters

• Ensure proper ventilation in areas where argon is stored or used.
• Use appropriate cryogenic storage tanks and equipment.
• Regularly monitor oxygen levels to prevent asphyxiation risks.
• Train staff on emergency procedures related to argon exposure.

Common questions

What materials are suitable for LAR storage?

Stainless steel and aluminum alloys are suitable for cryogenic storage of liquid argon.

Why can't I use a regular tank for LAR?

Regular tanks, especially those made of polyethylene, can't handle the extreme cold and will become brittle and shatter.

How can I prevent argon pooling?

Ensure good ventilation and use oxygen monitors to detect low oxygen levels in areas where argon might pool.