This product is mainly used for prestressed and post-tensionning technology in various shapes of prestressed concrete structures. And widely used for civil engineering construction such as large scale railroad, high-way bridges, buildings trusses, overhead crane beams, industrial and prefabricated concrete floor, wall board, tubular piples, PC water pipes, TV towers and nnclear power station, etc. Active standard: GB/T5223, ASTM421, BS5896, JISG3536, ISO6934, EN10138 or other special required standards.