The production process of the cap

　　In the field of pipeline transportation, the cap is more and more widely used, demand is also increasing. Effect of cap in the pipeline in the field it is not only limited to the pipeline plugging, all kinds of new functions of cap came into being. Perforated cap is one of them, the types of cap hole needs to be opened in the end, the hole has cap connected to other branch lines function. The traditional production process for manufacturing opening cap, need to be pressed into a ASTM A234 Wpb Pipe fitting Caps, followed by the opening, the traditional process of the types of cap material utilization rate is low, complex process, low production efficiency and production cost. At the same time because of the pressing process, the deformation amount is larger, the cap outer arc wall thickness can not be guaranteed