Wenzhou Longwan Junkai Valve Factory is located in Longwan, the valve capital of China. Is a professional manufacturer of stainless steel valves.
The company has complete equipment, advanced technology and quality, scientific management, complete testing means, and has established a perfect quality assurance system. Equipped with advanced testing equipment such as physical and chemical analysis, mechanical properties, water, air pressure, flaw detection, etc., each process from raw materials to finished products is inspected by special personnel, forming a complete inspection process.
Next, Junkai Valve will talk about some problems that are easy to encounter in the processing of stainless steel flanges:
1. Weld defects:
The weld defects of stainless steel flanges are relatively serious. If manual mechanical grinding is used to make up for them, the marks produced by grinding will cause uneven surfaces and affect the appearance.
2. Uneven polishing and passivation:
Pickling and passivation treatment should be carried out after manual grinding and polishing. For workpieces with relatively large areas, it is difficult to achieve uniform and uniform treatment effects, and the surface cannot be ideally uniform. There are also labor costs. The cost of accessories is also higher.
3. Scratches are not easy to remove
The overall pickling passivation will cause chemical corrosion or electrochemical corrosion to rust in the presence of corrosive media, and impurities such as carbon steel and spatter adhering to the stainless steel surface due to scratches and welding spatter are not easy to remove.
The above are some of the problems that are easy to encounter in the process of stainless steel flange processing. In response to these problems, we have given corresponding solutions:
1. Select blanking, after completion, enter the next process, different workpieces of stainless steel enter the corresponding process according to the processing requirements.
2. When bending, according to the size on the drawing, the thickness of the 304 seamless steel pipe should determine the tool and kerf used for bending. Avoiding the collision between the product and the tool and causing deformation is the key to the selection of the upper die (in the same product). , different types of upper molds may be used), and the selection of lower molds is determined according to the thickness of the sheet.
3. In order to weld firmly, it is necessary to make bumps on the workpiece to be welded, so that the bumps are evenly contacted with the plate before power-on welding, so as to ensure the consistent heating of each point. Colleagues can also determine the welding position, which needs to be welded and adjusted. Good pre-pressure time, pressure holding time, maintenance time, rest time, to ensure that the workpiece spot welding is firm.
Junkai always pursues the tenet of “quality first, credit first”. To provide users with high-quality products and good and thoughtful after-sales service. Warmly welcome friends from all walks of life to discuss cooperation and create brilliance together!