Bulk Supply | Proven Quality | Global Delivery | Since 1983 RAYOUNG: China’s leading Supplier for Industrial Steel Pipe Solutions Full Spectrum: Specialized in Seamless, ERW, LSAW, and SSAW pipes, coated pipes. Materials: Carbon, Alloy, and Stainless Steel. Global Standards: API 5L, ASTM A53, A333,ASTM A106, EN10217, DIN1629, GOST standard and more. Authority Approved: ISO/CE Certified. Customised steel pipe solutions are also available to meet specific project requirements.