Helium (He)

is the second-lightest element (hydrogen being the lightest) has a gaseous specific gravity of 0.138. It’s a colorless, odorless, high thermal conductivity, lowest boiling point (-452°F), low molecular weight, small molecule size and tasteless inert gas. Helium is present in dry air at a concentration of 0.0005%. Its principal source is a natural gas well where the helium is extracted from the crude natural gas stream and purified. Helium can be stored and shipped either as a gas or cryogenic liquid.

Common uses of Helium?

Helium is used in welding, analytic equipment, balloons, deep sea diving, leak detection, and in it's cryogenic state for super cooling.

Common Cylinder Sizes

Bulk - call for details
Liquid Cylinders - call for details
T - 336cf, J - 241cf, DEY - 110cf, Q - 73cf, G - 40cf Cylinder Pressure changes with temperature, click to find out details (pdf)
Larger Cylinder Sizes and High Pressures available. Please call.

How many balloons from a reusable cylinder?

These are estimates and the size of the balloon make a big difference as you can see.

Fun Fact

It takes 15 cf of helium to lift 1 pound.

Common Conversion Factors

1 gallon liquid (nbp) = 100.8 cf Gas (NTP)
1 liter liquid (nbp) = 26.63 cf Gas (NTP)
1 kg = 213.2 cf Gas (NTP)
1 pound = 96.7 cf Gas (NTP)

Properties of Helium:

Molecular Weight: 4.003
Specific Volume: 96.7 CF/lb
Flammable Limits: Nonflammable
CGA Valve: 580, 3HP-677, 2HP-680
DOT Name: Helium, Compressed
UN No.: UN1046
DOT Class: 2.2
DOT Label: Nonflammable
CAS Registry: 7440-59-7

Helium Purity Levels

Cylinder Size Details (pdf)

MSDS

Safe Handling of Compressed Gases (pdf)