目前聚氨酯泡沫保温层在油气集输的管道上得到了广泛的应用。预制好的保温管,在拉运和施工过程中,保温层常会被损坏。另外,大量的焊口需要在现场补接保温层。据有关资料介绍,聚氨酯泡沫塑料配比中的甲组分(包括聚涂、催化剂、发泡剂等各种助剂)要保持在 25℃左右;乙组分(异氰酸酯)要保持在45℃左右时混合才能稳定发泡。而在冬季施 At present, polyurethane foam insulation layer has been widely used in oil and gas pipelines. Prefabricated insulation pipe, in the transport and construction process, the insulation often be damaged. In addition, a large number of weld need to complement the insulation layer in the field. According to the relevant information, the proportion of polyurethane foam component A (including coating, catalyst, foaming agent and other additives) should be maintained at about 25 ℃; B (isocyanate) should be maintained at about 45 ℃ When mixed to stabilize the foam. Shi in the winter