Discussion on waterproof and anticorrosion of direct-buried heat-supply pipelines in coastal cities

According to the situation of higher water level and chloride ion content of ground water in Qinhuangdao city, which causes direct-buried heat-supply pipelines corroded seriously, presents the methods of waterproof and anticorrosion for compensators of primary pipelines, conduit joints and traversing basement pipelines, combining with the problem appeared in design, construction and operation of central heating systems.