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所谓内衬法是指将由高耐腐蚀性的聚氯乙烯和合成粘合材料制成的复合软筒置入待修钢管内壁,经加温、加压使其与管内壁牢固粘结成为一体,其优越性为: (1)彻底解决了旧管道的修复和再生问题。复合内衬与管壁牢固地粘接,不但可提高管道耐腐蚀性能,而且由于复合内衬材料本身具有的高强度(抗张强度 50～80MPa)对受损的管壁也起到了结构增强作用。在DN219管道上做试验,在45m受试管段上,分三处人工开孔,直径为3mm。置入内衬后,固化72h,作水压试验,在20MPa的高压下,小孔仍未漏水,证明该复合内衬筒具有极好的增加作用。
The so-called lining method refers to the high corrosion resistance of PVC and synthetic adhesive material made of composite soft tube into the pipe wall to be repaired, heated, pressurized so that the pipe wall firmly bonded into one, Its advantages are: (1) completely solve the old pipeline repair and regeneration problems. Composite lining and pipe wall firmly bonded, not only can improve the pipe corrosion resistance, but also because the composite lining material itself has a high strength (tensile strength 50 ~ 80MPa) on the damaged wall also played a role in structural enhancement . In DN219 pipeline to do the test, in the 45m test tube section, divided into three artificial openings, a diameter of 3mm. After placing the lining, curing 72h, for hydrostatic test, under the high pressure of 20MPa, the hole has not leaking, proving that the composite liner has an excellent increase in the role.