pure helium
Inquiry
| Post Date: | Jun 27,2013 |
| Expiry Date: | Jun 27,2014 |
| Detailed Description: |
Cas No. :7440-59-7
Payment Method: TT or LC Helium gas 1. Description: Helium gas (He) is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. 2. Physical properties Commodity Molecular Formula CAS No. UN No. Hazardous Class Standard Package Container Filling Cubic Meter Picture Helium gas He 7440-59-7 1046 2.2 40L/150bar cylinder 6m3 47L/150bar cylinder 7m3 47L/200bar cylinder 9.4m3 50L/200bar cylinder 10m3 30lb tank (disposable) 0.25m3 50lb tank (disposable) 0.4m3 3. Typical technical data Contents Industrial Helium Gas High Purity Helium Gas Exceed High Purity Helium Gas Helium (%) ≥99 ≥99.999 ≥99.9999 Impurity (ppmv) Limit Ne - ≤4.0 - H2 ≤2000 ≤1.0 ≤0.5 O2 ≤8000 ≤1.0 - N2 - ≤1.0 ≤0.5 CO - ≤0.5 ≤0.1 CO2 - ≤0.5 ≤0.1 CH4 - ≤1.0 ≤0.1 H2O - ≤1.0 ≤0.2 4. Applications 1). Compared with Hydrogen, it has the advantage of being non-flammable (in addition to being fire retardant), and it’s lighter than air, airships and balloons are inflated with helium for lift. 2). It is used as a shielding gas in arc welding processes on materials that at welding temperatures are contaminated and weakened by air or nitrogen. Helium is used instead of cheaper argon especially for welding materials that have higher heat conductivity, like aluminium or copper. 3). It is used as a tracer gas to detect leaks in high-vacuum equipment (such as cryogenic tanks) and high-pressure containers. 4). For its low solubility in nervous tissue, helium mixtures such as trimix, heliox and heliair are used for deep diving to reduce the effects of narcosis 5). Helium is a commonly used carrier gas for gas chromatography. 6). The use of helium reduces the distorting effects of temperature variations in the space between lenses in some telescopes, due to its extremely low index of refraction.[5] This method is especially used in solar telescopes where a vacuum tight telescope tube would be too heavy. 5. Notice for Helium Gas Helium gas is high pressure gas with colorless, odorless, tasteless, non-toxic, non-flammable stored in gas cylinder. Normally, its pressure is 15Mpa(150Bar), and should be operation after reduced the pressure with pressure reducer. Meanwhile, people should inspect the gas pipeline and make sure the pipeline without air leak. The cylinder with packed helium gas has life period marked on cylinder, if over life period, it must be sent to related department to inspect, and then keep on storing. When close the end for helium gas packed with cylinder, there should be at least 0.25Mpa pressure, then close valve to make sure the quality and safe. ※ The difference of Helium gas and Hydrogen gas to fill balloon Hydrogen is active gas, and easy to react with other gas. If this, then cause explosion. But helium gas is a rare and inert gas and not easy to react with other gas, then very safe, which has been widely use all over the world. We also can provide you with industry gases, high purity gases in electric industry, say argon, helium, hydrogen, Nitrogen, Acetylene, Carbon Dioxide (CO2), Nitrous Oxide (N2O), Sulfur Hexafluoride (SF6), Sulfur Dioxide (SO2), liquid chlorine, propane, Ar+CO2, etc. |
| CAS Registry Number: | 7440-59-7 |
| Molecular Formula: | He |
| Molecular Weight: | 4.002602 |
| Molecular Structure: | 
|
| Company: | Anqiu Hengan Gas Manufacture Factory [ China ] |
| Contact: | Angie |
| Tel: | 86-18660286101 |
| Fax: | 86-532-68698194 |
| Email: | angie@hengangas.com.cn |
-
Disclaimer statement:The information and data included above have been realized by the enterprises and compiled by the staff, and are subject to change without notice to you. The Chemnet makes no warranties or representations whatsoever regarding the facticity, accuracy and validity of such information and data. In order to ensure your interest, we suggest you chose the products posted by our gold suppliers or VIP members.
