The prefabrication fittings are specially designed for the water conservancy project in Singapore. Made using WP316L stainless steel, the duckfoot bends feature outer diameters of DN700, DN1000, DN1500, and DN2200. The maximum thickness of the stainless steel bends reach up to 32mm. The end connecting with the flange is supported by special steel bars. Due to the large size, the flat rack container was applied for easy loading and unloading.