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针对管道内防腐的现状，简要介绍了管道内涂防腐技术的经济意义，并较为详细地论述了ＰＩＧ 管道内涂敷的原理、施工工艺流程、施工机具的准备、涂料的选择以及施工中应该注意的其他问题．另外，结合现场实践还给出了一些经验数据．
In view of the present status of anticorrosive in pipeline, the economical significance of anticorrosive technology in pipeline is briefly introduced, and the principle of coating in PIG pipeline is elaborated in detail. The construction process, the preparation of construction equipment, the choice of coating material and the construction should pay attention Other questions. In addition, some empirical data are also given in combination with the field practice.