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ASTM D6301-2008 在生产用水中悬浮固体和离子固体线上复合样品采集的标准实施规程

ASTM D6301-2008 在生产用水中悬浮固体和离子固体线上复合样品采集的标准实施规程

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【英文标准名称】: Standard Practice for Collection of On-Line Composite Samples of Suspended Solids and Ionic Solids in Process Water
【原文标准名称】: 在生产用水中悬浮固体和离子固体线上复合样品采集的标准实施规程
【标准号】: ASTM D6301-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D19.03
【标准类型】: (Practice)
【标准水平】: ()
【中文主题词】:
【英文主题词】: corrosion products; corrosion product sampler; filtration; integrated sample; ion exchange membranes; Corrosivity--water; Filtration; Integrated sample; Ion exchange materials/applications; Nonfilterable matter; Sampling water analysis applications; Water
【摘要】: The transport of any suspended solids or corrosion products from the preboiler cycle has been shown to be detrimental to all types of steam generating equipment. Corrosion product transport as low as 10 ppb can have significant impact on steam generators performance. Deposited corrosion products on PWR steam generator tubes can reduce heat transfer, and, if the deposit is sufficiently thick, can provide a local area for impurities in the bulk water to concentrate, resulting in a corrosive environment. In BWR plants, the transport of corrosion products can cause fuel failure, out of core radiation problems from activation reactions, and other material related problems. In fossil plants, the transport of corrosion products can reduce heat transfer in the boilers leading to tube failures from overheating. The removal of these corrosion products by chemical cleaning is expensive and potentially harmful to the boiler tubes. Normally, grab samples are not sensitive enough to detect changes in the level of corrosion product transport. Also, system transients may be missed by only taking grab samples. An integrated sample over time will increase the sensitivity for detecting the corrosion products and provide a better understanding of the total corrosion product transport to steam generators.1.1 This practice is applicable for sampling condensed steam or water, such as boiler feedwater, for the collection of suspended solids and (optional) ionic solids using a 0.45-x03BC;m membrane filter (suspended solids) and ion exchange media (ionic solids). As the major suspended component found in most boiler feedwaters is some form of corrosion product from the preboiler system, the device used for this practice is commonly called a corrosion product sampler. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: Z12
【国际标准分类号】: 13_060_45
【页数】: 4P.;A4
【正文语种】: 英语

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