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ASTM A 249/A 249M-2003 锅炉、过热器、换热器和冷凝器用焊接奥氏体钢管标准规范

上一篇: ASTM A 1018/A 1018Ma-2003 热轧碳钢、商品钢、拉制钢、结构钢、高强度低合金钢及可加工性提高的高强度低合金钢薄板、带材和特厚卷材规范
下一篇: ASTM B 422-2003 铜铝硅钴合金、铜镍硅镁合金、铜镍硅合金、铜镍铝镁合金及铜镍锡合金薄板和带材标准规范

标准名称：	承压用复合无缝钢管
英文名称：	Composite seamless steel tubes for pressure
中标分类：	冶金 >> 钢铁产品 >> 钢管、铸铁管
发布部门：	中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会
发布日期：	2012-11-05
实施日期：	2013-05-01
首发日期：	2012-11-05
作废日期：
主管部门：	中国钢铁工业协会
归口单位：	全国钢标准化技术委员会
起草单位：	武汉锅炉集团特种锅炉工程有限责任公司、北京长兴凯达复合材料科技发展有限公司、冶金工业信息标准研究院、攀钢集团江油四川长城特殊钢有限公司等
出版社：	中国标准出版社
出版日期：	2013-05-01

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Product Code:SAE AIR1939
Title:Aircraft Engine Life Cycle Cost Guide
Issuing Committee:E-35 Prop Economics For Acquisition And Ownership Committee
Scope:AIR 1939 provides guidelines in lieu of directives to achieve consistent Life Cycle Cost (LCC) analysis for military aircraft engines. AIR 1939 deals specifically with the direct Life Cycle Cost elements of Aerospace Propulsion Systems. It is recognized that propulsion is normally one part of a larger system, and that through its performance interaction with this overall system, propulsion can often exert a greater influence on system costs than are possible through changes in the direct propulsion system cost elements. AIR 1939 is not directed at this performance interaction issue. Instead, it provides a Life Cycle Cost approach which is a stand-alone measure of propulsion system cost - but which can also serve as a cost building block for broader system-oriented cost-benefit evaluations. AIR 1939 addresses communication of LCC data between equipment suppliers, aircraft engine producers, aircraft manufacturers, and users. The LCC data categories addressed include research, development, test and evaluation (RDT&E); acquisition (initial procurement and investment); and operating and support (O&S) costs. While input and output formats are suggested, calculation procedures and cost methodology are specifically included since many LCC models preferred by the industry are company sensitive or proprietary. The relationship of LCC input data to program phase is described. Ground rules and assumptions are addressed. A glossary of LCC terms is provided. The LCC impact of propulsion systems on other aircraft systems is considered. This document was specifically developed for military propulsion system cost analysis. However, it is believed that a functional relationship exists between military and commercial Life Cycle Cost analysis and that with some interpretation, sections of AIR 1939 might be applicable to commercial propulsion systems as well. AIR 1939 provides a basis for LCC calculations, for monitoring of LCC status resulting from trade studies, and for tracking status against LCC goals in a consistent manner, thus permitting quantitative, comparable assessment. AIR 1939 guidelines recommend that a Life Cycle Cost presentation include consideration of overall cost rather than a sub-optimization of just one or a few cost elements.

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