Cangzhou Hongshi Pipe Equipment Co., Ltd. is located in Mengcun Hui Autonomous County, known as the hometown of pipe fittings in China, situated along the coast of the Bohai Sea. We produce various types of pipe sleeves according to the design sets by the National Building Research Institute, including the 02S404, S312, 05S2, 07FS02, 07FK02, and 91SB3-1 sets. Our products mainly include flexible waterproof sleeves, rigid waterproof sleeves, single-sided sealed waterproof sleeves, double-sided sealed waterproof sleeves, flexible sealed sleeves, flexible double cover sleeves, ventilation sleeves, manifold valves, manholes and accessories, rubber flexible connectors, expansion joints, high, medium, and low-pressure flanges in various models, elbows, caps, reducers, tees, standard parts, grooved pipe fittings, large bends, elbows, metal gaskets, and rubber gaskets, etc. Our company boasts a strong technical team with excellent design, advanced technology, and a group of senior technicians and skilled workers with years of manufacturing experience. Our products are of high quality, and our company enjoys a good reputation, striving for perfection and offering reasonable prices. We survive through quality, develop through reputation, conduct business ethically, keep pace with the times, innovate, and this is the unwavering service tenet of all our employees. Quality is the life of the enterprise, safety is the guarantee of the enterprise, and customers are the god of the enterprise. All employees of Cangzhou Hongshi Co., Ltd. warmly welcome domestic customers to discuss business. We steadfastly adhere to the quality policy of "honesty and trustworthiness, quality first," and jointly develop our grand business on the basis of equality and mutual benefit!