In the last few years, the application of piling pipe around the usual, an increasing number of big size stack, the present optimum size of the stack pipeline has actually been generated to 3620mm, in the seaside, river, Lake location is commonly made use of. Offshore deepwater dock job in residential seaside has actually been large building, heap structure and also primary bearing capability as deep-water dock, big size steel pipeline stack spiral weld of frequently utilized; additionally, bridges, roadways, skyscrapers are all required in piling pipe.