As a high-performance engineering plastic, PEEK (polyetheretherketone) is highly favored in the sealing field for its excellent resistance to high temperature, high pressure and chemical corrosion. Especially in sealing ring products that need to work in extreme environments, PEEK material has shown its unique advantages. Traditional large sealing ring manufacturing methods, such as direct injection molding, molding or extrusion, are often costly and have low material utilization. To solve this problem, we adopted a new manufacturing process: first design the PEEK sheet, then process it into a suitable arc shape through precision engraving, and finally connect these arcs into a complete ring through welding technology. This process not only increases the material utilization rate to more than 80%, but also through precise control of the temperature, pressure and time during welding, the mechanical properties after welding can reach more than 90% of the raw materials, thus ensuring the high quality of the product. The welding of PEEK material is a process of heating the material to a molten state and then tightly combining the two surfaces under pressure. In this process, new chemical bonds are formed between the material molecules to achieve a strong connection. This method is particularly suitable for the welding of large PEEK sealing rings. By adjusting the welding parameters, the best welding effect can be guaranteed. This welding technology brings the following significant benefits: The arc welding is formed by precision carving of the plate, and the material utilization rate can reach more than 80%. The weld is uniform and defect-free, which can effectively prevent the leakage of the medium and ensure the normal operation of the equipment. The tensile strength, bending strength and impact strength can all reach 90% of the raw materials. After fatigue testing, there is no obvious difference from the raw materials, which can reduce the replacement and maintenance costs. PEEK large welding sealing rings are widely used in many industries due to their excellent performance: Chemical industry: In chemical production, PEEK sealing rings can withstand harsh conditions such as corrosion, high temperature and high pressure of chemical media, ensuring the safety and stability of the chemical production process. For example, in the production of sulfuric acid, PEEK sealing rings can resist the corrosion of concentrated sulfuric acid and the high temperature and high pressure environment in the reactor. Oil industry: In the process of oil extraction and refining, PEEK sealing rings can work normally under various complex components in oil and high temperature and high pressure environment, prevent oil leakage, protect the environment and ensure the normal operation of equipment. Power industry: In the steam pipes, steam turbines and other equipment in thermal power plants, the high temperature resistance of PEEK sealing rings can meet the sealing requirements of steam pipes and improve the efficiency and safety of power generation equipment. PEEK material has become an indispensable material in the chemical, petroleum and power industries due to its excellent performance in the field of sealing. With the continuous advancement of technology, the application scope of PEEK sealing rings will be further expanded to provide high-performance sealing solutions for more industries.