In straight pipeline welding joints, it is possible to use anti-corrosion tape to prevent corrosion, so what is used to prevent corrosion in bent pipes? At this time, it is not possible to use a heat shrinkable tape, because the 500mm wide heat shrinkable tape at the elbow is not easy to cover, and it is easy to fold and flare. At this time, it is necessary to use heat shrinkable winding tape, which is also a type of heat shrinkable tape, but it is cut into different widths according to different tube diameters. The regular width is 5/10/15/20 cm. Here's how to use it for everyone:

     1. Use a sander, wire brush or sandblasting tool to polish the surface to be anti-corrosion smooth, clean and remove rust. If it is used for patching, the outer protective layers of both ends will be sanded. ,

     2. Preheat the surface of the steel pipe to about 90 degrees Celsius, then heat the inner layer of hot shrinkable tape at one end of the heat shrinkable tape with a slight fire until it completely melts, and then quickly paste it on the surface of the steel pipe.

     3. The heat shrinkable tape is lined with hot melt adhesive while the heat shrinkable tape is not less than 50mm.

     4. After the winding is completed, heat the heat-shrinkable tape with a small fire, and press out the bubbles with your hands (wearing gloves) while heating, until the hot-melt adhesive overflows from the edge of the tape and the overlap.

     5. The end of the heat shrinkable winding tape should be pasted firmly, and flattened by hand (wearing gloves) while heating. If used for patching, the overlap between the heat shrinkable wrapping tape and the outer sheath is not less than 80mm.

     Generally, 50% overlap is recommended for the construction of heat shrinkable winding tape. It is recommended to use two people for construction, one for baking, and one for heat shrink wrap.

弯管如何用热缩带进行防腐施工

    在直的管线焊口中，可以用补口热缩带进行防腐，那么在弯管用什么来防腐呢。这个时候不能用补口热缩带了，因为弯头处用500毫米宽的热缩带进行防腐不好包覆，很容易褶皱和喇叭口。这个时候就需要用到热缩缠绕带，也是热缩带的一种，只不过是根据不同管径裁剪成不同的宽度。常规宽度有5/10/15/20公分。下面为大家介绍下使用方法：

    1， 用打磨器、钢丝刷或者喷砂等工具将待防腐表面打磨光滑、清洁除锈。如用于补口，再将两端外防护层砂毛。,

    2， 预热钢管表面到90摄氏度左右，再用微火加热热缩缠绕带一端内层热熔胶至完全融化，然后迅速将其黏贴在钢管表面。

    3，以热缩缠绕带搭接不小于50mm的方式，边加热热缩缠绕带内衬热熔胶，边缠绕。

    4，缠绕完成之后，再用微火全面将热缩缠绕带加热一遍，边加热边用手（戴好手套）将气泡压出，至热缩缠绕带边缘及搭接处有热熔胶溢出。

    5，热收缩缠绕带的末端要粘贴牢固，边加热边用手（戴手套）压平。如用于补口，热收缩缠绕带与外护层搭接不小于80mm。

    一般热缩缠绕带施工时，都是建议采用50%搭接。建议两人施工，一人烘烤，一人拿好热缩缠绕带。