Cangzhou Hongshi Pipeline Equipment Co., Ltd. is located in Mengcun Hui Autonomous County, a national pipe fitting hometown by the Bohai Sea, producing a variety of pipe sleeves based on the 02S404, S312, 05S2, 07FS02, 07FK02, and 91SB3-1 catalogs designed by the National Research Institute of Building Science. We process and manufacture pipe sleeves according to these catalogs. Our products include flexible waterproof sleeves, rigid waterproof sleeves, single-sided sealed waterproof sleeves, double-sided sealed waterproof sleeves, flexible sealed sleeves, flexible double-gasket sleeves, ventilation sleeves, manifold valves, manholes and accessories, rubber flexible joints, expansion joints, high, medium, and low-pressure flanges in various models, elbows, caps, reducers, tees, standard parts, grooved pipe fittings, large bends, elbows, metal and rubber gaskets, etc. Our company boasts a strong technical team, excellent design, advanced technology, and a group of senior technicians and technical staff with many years of manufacturing experience. Our products are robust, and our corporate reputation is excellent. We strive for perfection, offering reasonable prices. Surviving on quality, seeking development through reputation, engaging in civilized business practices, keeping pace with the times, and innovating are the unwavering service tenets of all our employees. Quality is the lifeblood of the enterprise, safety is the guarantee, and customers are the gods. The entire staff of Cangzhou Hongshi Company warmly welcomes domestic customers to discuss business. We steadfastly adhere to the quality policy of "honesty and trustworthiness, quality first," and aim to jointly achieve grand undertakings on the basis of equality and mutual benefit!