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GB/T 4844-2011
GB/T 4844-2011 Pure helium,high pure helium and ultra pure helium
Abstract
This standard specifies the technical requirements, inspection rules, inspection methods, product packaging, marking, storage and transportation, and safety warnings for gaseous helium and liquid helium. This standard applies to pure helium, high-purity helium, and ultra-pure helium extracted by cryogenic methods, which are mainly used in optical fiber, lasers, welding and cutting, diving respiration, low-temperature superconductivity, pressurization, cleaning, and protective gases. Molecular formula: He. Molecular weight: 4.002 602 (based on the 2007 International Atomic Weight Table).
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Replaced |
| Standard Code | GB/T 4844-2011 |
| CCS | Industrial gases and chemical gases |
| ICS | Industrial gases |
| Implement Date | 2012-10-01 |
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$ 47