Hong Kong Souther International Group Co., Ltd. is a contract manufacturer of plastic pipes and fittings, established in 2009 and based in Shenzhen, China. With 51 to 100 employees and an annual sales volume ranging from US$10M to US$30M, the company operates a factory in Dongguan equipped with advanced German production lines and an international standard R&D center. They specialize in a wide range of PE, HDPE, and PP-R pipes, including PE100 and PE80 pipes for water supply and gas, HDPE pipes for drainage (double-wall corrugated, hollow wall winding, and winding reinforced), MPP cable pipes, PE communication protecting pipes, PP-R cold/hot water pipes, PP-R steady-state pipes, and silicon core ducts. Their products, ranging in diameter from 20 mm to 3300 mm, are utilized in municipal engineering, industrial and civil architecture, telecommunications, petrochemical processing, and agricultural irrigation. Hong Kong Souther International Group Co., Ltd. holds ISO 9001 and ISO 14001 certifications and is recognized as a "plastic pipeline key technology" senior research qualified unit and a "deputy director" unit of the Guangdong Building Materials Council. The company boasts an annual production capacity of up to 50,000 tons and strong capabilities in product research, development, and mold manufacturing.
HDPE Pipe and Fittings for Water Supply
HDPE Double-Wall Corrugated Pipe for Water Drainage
Stroman Viet Nam Plastic JSC, a member of the Tan A Dai Thanh Group, is a premier manufacturer and distributor of high-quality plastic piping systems based in Hung Yen, Vietnam. Established in 2015, the company operates a state-of-the-art factory equipped with synchronized, automated production lines imported from leading German suppliers such as Krauss Maffei and Battenfeld Cincinnati. Stroman specializes in the production of uPVC, PP-R, and HDPE pipes and fittings, utilizing premium virgin raw materials from global corporations like Borouge and SCG. Their extensive product portfolio includes couplings, elbows, tees, reducers, valves, and siphons designed for diverse applications in water supply, drainage, civil construction, mining, and agricultural irrigation. The company adheres to rigorous international quality standards, including ISO 9001:2015, DIN 8077-8078, ISO 1452, and ISO 4427. With a workforce of 51 to 100 employees, Stroman provides OEM services and maintains a robust nationwide distribution network alongside its growing international export operations. Their business model focuses on delivering German-technology solutions that optimize water resource efficiency while remaining environmentally friendly.