论文部分内容阅读
编辑同志: 对于贵刊在1988年第6期上发表的杨瑞风同志所提供的“泡沫塑料保温材料一览表”,我们发现有值得指出与商榷之处。该表所列的泡沫塑料保温材料的导热系数均比实际可能的导热系数低了10倍,使用温度也与实际可使用温度不符,以第一种泡沫材料为例,这是1986年通过石油部部级鉴定并获部二等奖的其使用温度为-40～130℃,根据广泛调研,其它泡沫保温材料的实际使用温度也都在150℃以下,由于国内外目前尚无衡量泡沫保温材料耐热性和允许使用温度的统
Editors Comrades: For the “list of foam insulation materials” provided by Comrade Yang Ruifeng published in the 6th issue of the magazine in 1988, we have found it worth pointing out and discussing. The thermal conductivity of the foam insulation materials listed in the table is 10 times lower than the actual possible thermal conductivity, and the use temperature is also inconsistent with the actual usable temperature. Take the first foam material as an example. This was passed by the Ministry of Petroleum in 1986. The actual use temperature of other foam insulation materials is also below 150°C. The use of foam insulation materials has not been measured at home and abroad. Thermal and allowable temperature