English
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide.
Our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards.
We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors.
Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
Our Seamless Shock Absorber Tubes are manufactured to EN 10305-1 using high-quality steels such as E235 and E355. With no weld seam, these tubes offer superior strength, fatigue resistance, and flawless surface finish, making them ideal for automotive shock absorbers, struts, and high-performance hydraulic dampers.
