Trachoma in welded pipe and galvanized pipe

　　Welded pipes and galvanized pipes often bear major tasks such as structural support, fire water supply, etc., which are related to the safety of people's lives and property, and must not be lost. Problems such as trachoma and leakage welding may cause the stress structure of the pipe to change and the pressure bearing capacity to become weak, resulting in bending and fracture of the structural pipe, and accidents such as water leakage and pipe bursting of the water supply pipe. So, why are there problems with trachoma and leakage welding in pipe products? Mainly for the following reasons:

　　1. The strip of production pipe is deformed by collision

　　The welded pipe is also good, and the galvanized pipe is also welded by strip rolling. If the strip is in the process of transportation, the edge receives the collision, the bending is deformed, and the trachoma and the missing welding are easy to occur during the welding. phenomenon. To solve this problem, in addition to avoiding the collision during the transportation of the strip steel, pay attention to the protection of the strip steel, that is, mark the obvious deformation parts before the strip steel machine, and focus on the marked parts after the tube production is completed. Dispose of waste immediately if there is a quality problem.

　　2. Welder jump fire

　　The situation of welder fire jumping is mainly caused by the negligence of the staff and does not occur frequently. However, in the event of a welder flashover, it will inevitably lead to leakage welding.

　　3. Production line replacement production product size specifications

　　When the pipe production line is replaced with the size specification of the production product, the first few pipe products produced are prone to problems of trachoma and leakage welding due to the size specifications of the machine that have not been adapted at the beginning. Manufacturers with better quality control management will directly scrap the several tubes that were just started when the product size specifications were replaced. In order to improve the yield and reduce the production cost, many manufacturers sell such pipes as qualified products. Although the price is cheap, the problems caused by them are infinite.

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