ASTM C421预制块型隔热材料翻滚时易碎性的标准试验方法
日期:2012-02-13 21:39
od is intended to provide a procedure that gives reproducible results. It is used for comparing the mass loss by tumbling before and after a specific treatment of the insulation, as agreed upon by the purchaser and the manufacturer.
1. Scope
1.1 This test method covers determination of the mass loss of preformed block-type and preformed pipe-covering-type thermal insulation as a result of a combination of abrasion and impact produced by a laboratory tumbling mechanism.
1.2 The values stated in i
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