GB 4844.2-1995 纯氦

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基本信息
标准名称:纯氦
英文名称:Pure helium
中标分类: 化工 >> 其他化工产品 >> 工业气体与化学气体
ICS分类: 化工技术 >> 化工产品 >> 工业气体
替代情况:GB 4844-1984 GB 4845-1984;被GB/T 4844-2011代替
发布部门:国家技术监督局
发布日期:1995-12-20
实施日期:1996-08-01
首发日期:1984-04-18
作废日期:2012-10-01
主管部门:中国石油和化学工业协会
归口单位:全国气体标准化技术委员会
起草单位:化工部西南化工研究院
出版社:中国标准出版社
出版日期:1900-01-01
页数:3页
适用范围

本标准规定了纯氦产品的技术要求、检验方法、检验规则以及产品的包装、标志、贮存、运输等。本标准适用于以深冷法自空气、天然气或工厂弛放气中提取的瓶装气态氦,主要用于焊接、潜水呼吸、特种金属冶炼、色谱分析载气、以及增压、清洗用气等。

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所属分类: 化工 其他化工产品 工业气体与化学气体 化工技术 化工产品 工业气体
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MIL-DTL-10215L, DETAIL SPECIFICATION: SPEEDOMETERS, TACHOMETERS, FLEXIBLE SHAFT ASSEMBLIES, FLEXIBLESHAFT ASSEMBLY CORES AND ADAPTERS (15 AUG 2008)., This specification covers mechanical speedometers and tachometers, flexible shaft assemblies, flexible shaft assembly cores and adapters.Product Code:SAE AIR64
Title:Electrical and Electronic Equipment Cooling in Commercial Transports
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:This document considers the cooling of equipment installed in equipment centers, which usually consist of rack-mounted equipment and panel mounted equipment in the flight deck. In instances where these two locations result in different requirements, these are identified. For purposes of this document, the cooled equipment is referred to generally as E/E equipment, deonting that both electrical and electronic equipment is considered, or as an E/E equipment line-replaceable-unit (LRU). The majority of cooled equipment takes the form of LRUs. This document primarily relates to E/E equipment which is designed to use forced air cooling in order to maintain the equipment operating performance (within acceptable tolerances), and to maintain reliability. Cooling may be applied internally or externally to the case of the item of E/E equipment. There are also E/E equipment items which are cooled by natural convection, conduction, and radiation to the surrounding environment.Specification requirements, system design considerations, component design, and system testing are described. Also described are the analysis and test considerations for the thermal design of the avionic equipment. The discussion of supplementary cooling systems includes consideration of a refrigeration system. requirements, system design considerations, component design, and system testing are described. Also described are the analysis and test considerations for the thermal design of the avionic equipment. The discussion of supplementary cooling systems includes consideration of a refrigeration system.