目的 深港支线海底管道采用环氧底漆-热缩带-开孔型高密度聚氨酯泡沫补口，介绍深港支线海底管道补口施工过程及控制要点。 方法 通过对材料、设备、施工人员及施工过程的有效控制和管理，保证补口施工的质量。结果 深港支线海底管道施工完成后，经过现场检测，补口质量满足 DNV RP F102和 ISO 21809-3 的技术要求，填充泡沫的抗压强度及密度等指标满足设计要求。

The work aims to introduce the joint coating process and control essentials of Shenzhen-Hongkong submarine pipelines. Epoxy primer, heat shrink sleeves and opening high density polyurethane foam were jointly used in the joint coating of Shenzhen-Hong Kong submarine pipelines. The quality of joint coating was guaranteed by controlling and managing construction materials, equipment, construction personnels and process in an effective manner. The field test conducted after the completion of Shenzhen-Hong Kong submarine pipelines project showed that quality of joint coating met the technical requirements of DNV RP F102 and ISO 21809-3, and the compressive strength and density of polyurethane foam met the design requirements.