DIN 3752-1957 石棉板.石棉纸
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来源:标准资料网
【英文标准名称】:Asbestosmillboards,asbestospapers
【原文标准名称】:石棉板.石棉纸
【标准号】:DIN3752-1957
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:
基本信息
| 标准名称： | 滚动轴承 直线运动滚动支承 分类 |
| 英文名称： | Rolling bearings—Linear motion rolling bearings—Classification |
| 中标分类： |
机械 >>
通用零部件 >>
滚动轴承 |
| ICS分类： |
机械系统和通用件 >>
轴承 >>
滚动轴承
|
| 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： | 2011-11-21 |
| 实施日期： | 2012-06-01 |
| 首发日期： | 2011-11-21 |
| 作废日期： | |
| 主管部门： | 全国滚动轴承标准化技术委员会(SAC/TC 98) |
| 提出单位： | 机械工业联合会 |
| 归口单位： | 全国滚动轴承标准化技术委员会(SAC/TC 98) |
| 起草单位： | 洛阳轴承研究所有限公司、哈尔滨轴承集团公司、中国轴承工业协会 |
| 起草人： | 郭宝霞、王多亮、周宇、贾秋生 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2012-06-01 |
| 页数： | 16页 |
适用范围
本标准规定了直线运动滚动支承的分类。
本标准适用于对支承产品的分类管理。
前言
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目录
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引用标准
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T6930—2002 滚动轴承 词汇
ISO24393:2008 滚动轴承 直线运动滚动支承 词汇(Rollingbearings—Linearmotionrolling bearings—Vocabulary)
所属分类： 机械 通用零部件 滚动轴承 机械系统和通用件 轴承 滚动轴承
Product Code:SAE J1787
Title:Measurement of the Total Ash Content of Aviation Piston Engine Oils by a Calculation Method
Issuing Committee:E-38, Aviation Piston Engine Fuels And Lubricants
Scope:This SAE Recommended Practice describes an empirical method for determining the theoretical ash content of aviation piston engine lubricating oils by calculating the equivalent weight of metallic oxides formed at 775 掳C based on the metallic elemental concentration.The calculation method of ash determination may be used as an alternate to ASTM D 482 for application to the standards for aviation piston engine lubricating oils.Field of ApplicationThis procedure is recommended for use in the qualification, manufacturing, and quality assurance testing of aviation piston engine lubricating oils where the ash content is limited to a maximum of 0.011%.BackgroundThe ash content as measured by ASTM D 482 has very poor precision and repeatability for lubricants having low ash content. The precision statement for the method states that the reproducibility of a sample in the range of 0.001 to 0.079% ash content is 0.005%. Further, the bias of the test cannot be determined and there is no standard reference material containing a known level of ash for this method. This poor precision has led to numerous problems concerning the actual ash content of products on many occasions. The test method is valuable when run by experienced operators, but can provide dubious information if run under the general conditions stated in the method. For example, to obtain repeatable results, a platinum crucible must always be used in place of the silica or porcelain crucibles listed as equivalent substitutes. Meticulous care and procedural knowledge must be used by experienced operators for the method to be productive.The notes provided in ASTM D 482 also suggest that this method may not be appropriate for oils containing ashless additives or for oils containing certain phosphorous compounds which may now be in use in aviation lubricants. For oils containing additives an alternate method, ASTM D 874, is suggested. However, ASTM D 874 includes additional restrictions and reservattions which question the suitability of that method as an acceptable alternate or replacement for ASTM D 482 for low ash containing lubricating oils.
