规定了在规定的载荷、温度、相对湿度和时间条件下测定硬质泡沫塑料压缩蠕变的方法。将形状或矩形平行六面体的试样放置在两个平板之间，并按如下方式施加规定的载荷:程序A）在标准条件下，程序B）在商定的温度和时间条件下。应计算在标准大气条件下和规定时间后高温下加载试样的压缩变形差。

Specifies a method for the determination of compressive creep of rigid cellular plastics under specified conditions of load, temperature, relative humidity and time. Test specimes in form or rectangular parallelepipeds are placed between two flat plates and the specified load is applied as follows: procedure A) at standard conditions and procedure B) at agreed conditions of temperture and time. The difference in compressive deformation of the loaded specimen at standard atmospheric conditions and at elevated temperature after specified time shall be calculated.