管道高温定点测厚过程中存在测量数据偏大以及耦合剂选用不当引起的无法读数的问题。通过高温定点测厚试验研究, 将试验数据以温度与该温度下测厚所调整后的声速进行线性回归, 得出高温测厚的温度-声速线性方程。该方程用于管道高温定点测厚, 测量数据准确, 方法简便, 有效解决了测量数据偏大的问题。此外, 通过试验, 研究了高温耦合剂的性能, 筛选出高温状态下性能稳定的高温耦合剂。

The problem of big data difference and the incapability of reading data caused by using inappropriate couplant existed during the process of measuring the thickness at the certain spot at high temperatures. Linear equation of sonic speed under high temperature in different materials was derived from linear regressive analysis on the experimental data of sonic speed both under certain temperature and the temperature below. The equation was applied to measure the thickness of a certain place on the tube under high temperature circumstances accurately and conveniently which could solve the problem of coincident large data effectively. Otherwise, through the research on the performance of different couplants, the appropriate couplants which were able to effectively couple under high temperature were screened.