ASTM C518-17
采用热流计仪器法测定稳态热传递特性的标准试验方法

Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus


ASTM C518-17 发布历史

ASTM C518-17由美国材料与试验协会 US-ASTM 发布于 2017。

ASTM C518-17 在中国标准分类中归属于: P31 建筑物理,在国际标准分类中归属于: 91.120.10 建筑物绝热。

ASTM C518-17 采用热流计仪器法测定稳态热传递特性的标准试验方法的最新版本是哪一版?

最新版本是 ASTM C518-21

ASTM C518-17 发布之时,引用了标准

  • ASTM C1045 在稳态条件下计算热传递性能的标准规程
  • ASTM C1046 建筑围护结构构件上热通量和温度的现场测量的标准实施规程
  • ASTM C1058 评价和报告绝热材料热性能用温度的选择的标准实施规程
  • ASTM C1114 用薄加热器装置测定稳态热传输特性的标准试验方法
  • ASTM C167 毛毡或棉绒型绝热材料厚度和密度的标准试验方法
  • ASTM C168 与隔热有关的标准术语
  • ASTM C177 用护热板法测定稳态热通量和传导性的标准试验方法
  • ASTM C236 通过防护热箱对建筑组件稳态热性能的标准测试方法(2001 年撤回)
  • ASTM C687 松散填充型建筑材料热阻的测定的标准实施规程
  • ASTM C976 通过校准热箱的建筑组件热性能的标准测试方法(2002 年撤回)
  • ASTM E178 进行远距离观测的标准操作规程
  • ASTM E230/E230M 标准化热电偶的温度 - 电动势(emf)表的标准规范
  • ASTM E456 统计学名词及相关术语
  • ASTM E691 为测定试验方法精密度开展的实验室间的研究

ASTM C518-17的历代版本如下:

  • 2021年 ASTM C518-21 用热流计装置测定稳态热传输特性的标准试验方法
  • 2017年 ASTM C518-17 采用热流计仪器法测定稳态热传递特性的标准试验方法
  • 2015年 ASTM C518-15 使用热流量计仪器测量稳态热传输性能的标准试验方法
  • 2010年 ASTM C518-10 使用热流计测定稳态热传导特性的标准试验方法
  • 2004年 ASTM C518-04 用热流计法测定稳态热传递特性的标准试验方法
  • 2002年 ASTM C518-02 用热流计法测定稳态热通量和热传递特性的标准试验方法
  • 1998年 ASTM C518-98 用热流计法测定稳态热通量和热传递特性的标准试验方法
  • 1991年 ASTM C518-91 用热流计装置测量稳态热通量和热传输特性的标准试验方法

 

4.1 This test method provides a rapid means of determining the steady-state thermal transmission properties of thermal insulations and other materials with a high level of accuracy when the apparatus has been calibrated appropriately.

4.2 Proper calibration of the heat flow meter apparatus requires that it be calibrated using specimen(s) having thermal transmission properties determined previously by Test Methods C177, or C1114.

Note 1: Calibration of the apparatus typically requires specimens that are similar to the types of materials, thermal conductances, thicknesses, mean temperatures, and temperature gradients as expected for the test specimens.

4.3 The thermal transmission properties of specimens of a given material or product may vary due to variability of the composition of the material; be affected by moisture or other conditions; change with time; change with mean temperature and temperature difference; and depend upon the prior thermal history. It must be recognized, therefore, that the selection of typical values of thermal transmission properties representative of a material in a particular application should be based on a consideration of these factors and will not apply necessarily without modification to all service conditions.

4.3.1 As an example, this test method provides that the thermal properties shall be obtained on specimens that do not contain any free moisture although in service such conditions may not be realized. Even more basic is the dependence of the thermal properties on variables, such as mean temperature and temperature difference. These dependencies should be measured or the test made at conditions typical of use.

4.4 Special care shall be taken in the measurement procedure for specimens exhibiting appreciable inhomogeneities, anisotropies, rigidity, or especially high or low resistance to heat flow (see Practice C1045). The use of a heat flow meter apparatus when there are thermal bridges present in the specimen may yield very unreliable results. If the thermal bridge is present and parallel to the heat flow the results obtained may well have no meaning. Special considerations also are necessary when the measurements are conducted at either high or low temperatures, in ambient pressures above or below atmospheric pressure, or in special ambient gases that are inert or hazardous.

4.5 The determination of the accuracy of the method for any given test is a function of the apparatus design, of the related instrumentation, and of the type of specimens under test (see Section 10), but this test method is capable of determining thermal transmission properties within ± 28201;% of those determined by Test Method C177 when the ambient temperature is near the mean temperature of the test (T (ambient) = T (mean) ± 1°C), and in the range of 10 to 40°C. In

ASTM C518-17

标准号
ASTM C518-17
发布
2017年
发布单位
美国材料与试验协会
替代标准
ASTM C518-21
当前最新
ASTM C518-21
 
 
引用标准
ASTM C1045 ASTM C1046 ASTM C1058 ASTM C1114 ASTM C167 ASTM C168 ASTM C177 ASTM C236 ASTM C687 ASTM C976 ASTM E178 ASTM E230/E230M ASTM E456 ASTM E691

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