ZHENGMAO.ZHENGMAO was founded in 1974 as an anchor chain manufacturer. It has evolved into a specialized producer offering a diverse range of specifications with an annual output of 120,000 tons of marine anchor chains and mooring chains. The company operates 14 chain production lines, 6 vertical heat treatment furnaces, 1 400-ton fatigue testing machine, and 5 anchor chain tensile testing devices rated at 2000 kN, 5000 kN, 12000 kN, 24000 kN, and 40000 kN. Additionally, it possesses various metal-cutting machine tools, forging machines, and other equipment. ZHENGMAO's marine anchor chains and accessories have obtained certification from 11 classification societies worldwide, including China, the UK, Germany, the US, Norway, Japan, France, Russia, India, Italy, and South Korea. The company's R3, R3s, R4, R4S, R5, and R6 mooring chains comply with the specifications of DNV (Norway), ABS (USA), LR (UK), BV (France), and CCS (China) classification societies and have obtained their certification. ZHENGMAO anchor chains are exported to over 30 countries and regions including Japan, South Korea, Germany, Norway, Brazil, and Southeast Asia. Primary products include: marine chains, mooring chains, swivels, shackles, installation rings, and triangle plates.