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方法对酚醛树酯改性PIR泡沫保温材料进行性能测试，并预制了有机—无机保温结构、复合硅酸盐保温涂料等不同保温结构，在180、220、250℃条件下，采用YYJ120－2-J型热油炉，按GB8174－87标准对各埋地和架空保温试验段进行测试。目的针对辽河油区高温集输工艺的需要，研究开发出不同保温材料和保温结构。结果酚醛树酯改性PIR泡沫保温材料在180℃条件下，虽靠近管壁有局部碳化现象，但碳化层较硬，保温层外表面温度及热流损失值不随时间变化，实测总传热系数K≤0．6W／（m2·K）；复合硅酸盐类保温涂料热阻较小，层间温度高，散热损失大；微孔硅酸钙保温材料实测总传热系数小于1．0W／（m2·K），但局部缝隙处表面温度和散热损失都较高。结论酚醛树酯改性PIR泡沫材料可在180℃条件下短期使用；在200～250℃条件下，微孔硅酸钙外加双防护层保温结构较合理；复合硅酸盐类保温涂料不能应用。
Methods The properties of phenolic resin modified PIR foam insulation materials were tested, and different insulation structures such as organic-inorganic insulation structure and composite silicate thermal insulation coating were prefabricated. Under the conditions of 180, 220 and 250 ℃, YYJ120-2- J-type hot oil furnace, according to GB8174-87 standard on the buried and overhead insulation test section for testing. Aim To meet the needs of high temperature gathering and transportation in Liaohe Oilfield, different insulation materials and insulation structures are developed. Results The phenolic resin-modified PIR foam insulation had a partial carbonation close to the tube wall at 180 ℃. However, the carbonized layer was hard, and the temperature and the heat loss of the thermal insulation layer did not change with time. The measured total heat transfer coefficient K ≤ 0.6W / (m2 · K); composite silicate insulation coating thermal resistance is small, the interlayer temperature is high, heat loss; microporous calcium silicate insulation measured the total heat transfer coefficient is less than 1.0W / ( m2 · K), but the surface cracks at the local temperature and heat loss are higher. Conclusion Phenolic resin modified PIR foam can be used for a short time under the condition of 180 ℃. At 200-250 ℃, the structure of microporous calcium silicate plus double protective layer is reasonable. The composite silicate thermal insulation coating can not be used.