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astm d6904標準介紹
astm d6904是關(guān)于磚石結(jié)構(gòu)上外涂料抗風雨性的試驗方法：試驗要求以承受持續(xù)的水噴霧（雨）和動態(tài)壓力相當于98英里時速的風速對樣品進行測試。
1. scope
1.1 this practice is for the evaluation of the ability of coatings to resist the passage of water through masonry block when exposed to water spray and air pressure.
1.2 the values stated in inch-pound units are to be regarded as standard. the values given in parentheses are mathematical conversions to si units that are provided for information only and are not considered standard.
1.3 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.
2. referenced documents (purchase separately)
astm standards
d1475 test method for density of liquid coatings, inks, and related products
d3924 specification for environment for conditioning and testing paint, varnish, lacquer, and related materials
d3925 practice for sampling liquid paints and related pigmented coatings
▼astm d6904第三方檢測機構(gòu)
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