IS 11239 Pt.7-1985

标准号：IS 11239 Pt.7-1985
发布日期：1985/9/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard prescribes the method for measurement of coefficient of linear thermal expansion at low temperatures of rigid cellular thermal insulation materials.1.2 The test is not designed to give information about long-term exposure to low temperature which may alter the measured coefficient of thermal expansion.Note — Care should be taken in applying the value obtained in this test to calculate the overall coefficient of expansion of composite products of which the material under test is a part.