ASTM C740低温作业中真空反射隔热标准规范
日期:2012-02-13 19:07
thermal conductivity less than 0.007 W/mK [0.049 Btuin./hft2F] at 300k are required.
1.4 Insulations of this construction are used in a vacuum environment.
1.5 This practice covers the performance considerations, typical applications, manufacturing methods, material specification, and safety considerations in the use of these insulations in cryogenic service.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system m
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