New skills to deal with high-parameter heat exchanger port sealing problems

New skills to deal with high-parameter heat exchanger port sealing problems at the '2013 (3rd) National Petroleum and Chemical Heat Exchanger Skills and Equipment Exchange Conference' held in Wuxi on July 18th, at the Seal Factory, professor-level senior engineer Chen Sunyi Proposed: If the benefits of these two traditional plans are summarized, the spherical barrier sealing technology that integrates welding sealing and barrier sealing is applied to the port sealing of the end of the high-parameter heat exchanger tube box, and the effect of simple planning and reliable sealing should be obtained. . With the opening of petrochemical and coal chemical industries, high-parameter heat exchangers such as high temperature, high pressure, high-risk media, large diameter, and large flow are increasingly used in equipment, and traditional port sealing skills are facing new challenges. For example, the heat exchanger tube box sealing of high temperature and high pressure hydrogen equipment has used a variety of plans, from the traditional long-neck flange plan to the threaded locking ring seal or its simplified two-ring bolt sealing plan, and then to the Ω ring In the sealing plan, there have been cases of leakage of the tube box. Traditional welding seals are used for mechanical seals at flange joints that are not often disassembled under severe conditions. No gaskets can be placed. The plan is simple. This plan that is not a gasket seal is more reliable than the usual high-pressure gaskets. For heat exchangers with high temperature operation or large temperature changes. On the other hand, barrier seals have a long application process in pipeline fittings such as pumps and valves, and their skills are reliable. The spherical barrier sealing technology reduces the sealing surface, the welding and sealing is firm, and the center of the barrier has certain elasticity, and the elastic deformation protects the sealing welding. The plan is brief. The production and equipment cycle is short, the protection is simple, and the total cost is low. In addition, austenitic stainless steel is usually used to make spherical barriers, which can also provide corrosion-resistant fabrics for certain media.