ASTM C390 保温材料堆取样和验收的操作标准
日期:2012-02-13 21:36
This procedure is intended primarily for the inspection of a continuing stream of lots, and there is not a high probability of rejecting occasional off lots. Consumer protection is based on economic pressure on the producer, through greater risk of lot rejection, to maintain the process average at 90 % conformance or better. Operating characteristic curves for the sampling plans employed can be found in Practice E 2234, Table X-C through Table X-F.
It is not the intent of this procedure to estim
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