论文部分内容阅读
根据什么原则选择适用于管线的涂敷方法,这主要取决于两个因素:第一是防护涂层的性能,它是由工艺特征来决定的;第二是要考虑成本,其中对成本影响大的首先应是施工技术而不是原材料的成本。目前管线涂敷材料主要有以下几种:1.煤焦油瓷漆和沥青。2.环氧粉末。3.聚乙烯。4.缠绕胶带。5.聚氨酯系。近十年来,管道防腐使用了沥青和煤焦油系涂料。这种涂料最大的缺点是涂层在机械外力作用下产生流动变形。为解决这一问题,曾采用了较厚的复合涂层,一般厚度在4～6mm。另外也采用了增强涂层及沥青煤焦油浸渍的玻
The choice of coating method for the pipeline depends on what principle depends on two factors: the first is the performance of the protective coating, which is determined by the process characteristics; the second is to consider the cost, which has a large impact on cost The first priority should be construction technology rather than the cost of raw materials. Currently pipeline coating materials are the following: 1. Coal tar enamels and asphalt. Epoxy powder 3. Polyethylene. 4 winding tape. 5 polyurethane system. In the past decade, asphalt and tar-based coatings have been used for pipeline corrosion protection. The biggest drawback of this coating is the coating under the action of mechanical deformation flow. In order to solve this problem, thick composite coatings have been used, generally 4 to 6 mm in thickness. Also used to enhance the coating and asphalt coal tar impregnated glass