YIDUO.YIDUO, established in 2003 and registered in Dalian, Liaoning, is a high-tech enterprise specializing in the R&D and manufacturing of expansion joints, compensators, and insulated pipes. With a robust scale, the company occupies an area of 200,000 square meters and possesses domestically leading automated production lines capable of manufacturing various insulated pipes, compensators, and large corrugated expansion joints up to DN2000 in diameter. Its technological strengths are demonstrated through innovative solutions such as intelligent welding joint systems, pipeline leak detection, and smart heating platforms. The company holds ISO system certifications along with international accreditations including ASME and PED. Upholding a commitment to craftsmanship, YIDUO is dedicated to providing the market with high-quality pipeline system components and technical services.