ASTM C421 Standard Test Method for Tumbling Friability of Preformed Block-Type and Preformed Pipe-Covering-Type Thermal Insulation
ASTM C421预制块型隔热材料翻滚时易碎性的标准试验方法
1. ASTM C421标准适用范围
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 inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.
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. ASTM C421参考标准
ASTM C168 Terminology Relating to Thermal Insulation
ASTM C302 Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation
ASTM C303 Test Method for Dimensions and Density of Preformed Block and Board-Type Thermal Insulation
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