PRODUCTS

PRODUCT SUMMARY

Chemical Formula	He
Purity	99.999 %
CAS Number	7440-59-7
UN Number	1046
Name	Helium, Compressed
Label	Nonflammable Gas
Hazard Class	2.2 Nonflammable Gas

Description

Application

Precautions

Industry

Supply Mode

Helium is one of three rare gases found in the atmosphere. As a gas in the atmosphere, it is present in a concentration of 5 ppm. Helium (He) is the second lightest process gas next to hydrogen. Colorless, odorless, tasteless, nontoxic and chemically inert, helium is nonflammable and, when compared with argon, has a high thermal conductivity. Helium-enhanced mixtures are utilized to create an inert gas shield and prevent oxidation during open arc welding of metals such as aluminum, stainless steel, copper and magnesium alloys. The addition of helium generally increases weld pool fluidity and travel speed. Penetration properties will be broader and travel speed is typically increased with the addition of helium to the shielding gas mixture. Use of helium-enhanced mixtures will also lessen the formation of welding ozone when welding on aluminum alloys.However in natural gas, concentrations of helium can be as high as 2%. Helium is only slightly soluble in water and is nonflammable. In gaseous form it is nontoxic, but still can displace oxygen in the air and act as an asphyxiant.
Helium in its liquid state can damage tissues with injuries resembling high temperature burns.

Product Grade	Specification	Content	Regulator Recommendations	Notes
6.0 Research/ Chromatographic	99.9999%* O2 < 0.1 ppm H2O < 0.2 ppm CO2 < 0.1 ppm CO < 0.1 ppm THC < 0.1 ppm N2 < 0.4 ppm Ar < 0.5 ppm H2 < 0.5 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	7000 Series: Semiconductor 4000 Series: Non-corrosive
5.5 Electron Capture Detector	99.9995%* O2 < 1 ppm CO2 + CO < 1 ppm THC < 0.1 ppm N2 < 2 ppm Ar < 1 ppm Halocarbons < 500 ppt H2O < 2 ppm	291 Std. Cu Ft. 218 Std. Cu Ft. 239 Std. Cu Ft. 135 Std. Cu Ft.	4000 Series: Non-corrosive	The sum of O2, CO2, THC as CH4, N2 and H2O < 5 ppm. A chromatogram of the Halogen and Hydrocarbon analysis is available with each cylinder.
5.5 Trace Analytical	99.9995%* O2 < 1ppm CO2 + CO < 1 ppm THC < 0.1 ppm N2 < 2 ppm Ar < 1 ppm Halocarbons < 500 ppt H2O < 2 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	4000 Series: Non-corrosive	The sum of O2, CO2, THC as CH4, N2 and H2O < 5 ppm.
5.5 LaserStar	99.9995%* O2 < 1ppm Halocarbons < 50 ppt THC < 0.1 ppm H2O < 1 ppm	239 Std. Cu Ft.	4000 Series: Non-corrosive
5.0 Laser Star	99.9995%* O2 < 1ppm THC < 0.5 ppm H2O < 2 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	4000 Series: Non-corrosive
5.0 Methanizer FID	99.999 %* O2 < 1 ppm H2O < 2 ppm CO2 < 1 ppb CO < 1 ppb THC < 0.5 ppm N2 < 5 ppm H2 < 1 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	3000 Series: Non-corrosive
5.0 Ultra High Purity	99.999 %* O2 < 1 ppm H2O < 2 ppm THC < 0.5 ppm N2 < 5 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	3000 Series: Non-corrosive
4.7 Laser Star	99.997 %* O2 < 3 ppm H2O < 3 ppm THC < 1 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	3000 Series: Non-corrosive 2000 Series: Non-corrosive
4.6 Zero	99.996 %* THC < 0.5 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	3000 Series: Non-corrosive 2000 Series: Non-corrosive
4.6 Oxygen Free	99.996 %* O2 < 0.5 ppm	291 Std. Cu Ft. 218 Std. Cu Ft.	3000 Series: Non-corrosive 2000 Series: Non-corrosive 100 Series: Non-corrosive
4.5	99.995 %* O2 < 5 ppm H2O < 5 ppm	519 Std. Cu Ft. 432 Std. Cu Ft. 333 Std. Cu Ft. 291 Std. Cu Ft. 218 Std. Cu Ft. 135 Std. Cu Ft.	4092 Series: Special Purpose 4092 Series: Special Purpose 4092 Series: Special Purpose 3000 Series: Non-corrosive 2000 Series: Non-corrosive 100 Series: Non-corrosive

Liquid Helium

Liquid Helium, also known as Helium-4 and Helium (cryogenic liquid), is a colorless, odorless, cryogenic liquid. Liquid Helium can cause dizziness and drowsiness, severe frostbite and rapid suffocation. Caution should be used as this is an extremely cold liquid under pressure.

Product Quality Information

Product Specifications	Connection CGA	Content	Gross Weight	Relief Setting psig
99.999% O2 < 1 ppm H2O < 2 ppm CO2 < 1 ppm CO < 1 ppm THC < 0.1 ppm N2 < 5 ppm H2 < 1 ppm Ne < 2 ppm	Coupling for 3/8" or 1/2" transfer tube	30 L 60 L 100 L	129 LB 209 LB 249 LB	1 1 1
	Coupling for 5/8" or 3/4" transfer tube	250 L 500 L	526 LB 824 LB	1 1

All liquid helium containers are of non-magnetic, stainless steel construction.
LT250 and LT500 containers have electric automatic pressure building units.