To suppress the head of wholesale selling pressure head http://www.hebftc2.com phone 0317-8210122, Mobile 13722724665 suppress the sub-head plant produced large towers and other equipment of the transport program, due to transportation reasons, generally, the program ⑤ block production is finished with a simple production, preparation factory, transported to the on-site assembly. Thus the advantages of the structure shown in Figure 1. Need to Break in the factory test pressure. Segmented pressure test key is required to ensure the flatness of the end faces. This article describes Lu called an economic reasonable segmented pressure test the structure of the head. O 12 sit bucket fiber JD-U-Z Nantong City of machinery for the Shanghai Takahashi chemical plant manufacturing a distillation column, its diameter 2200 mm, 65m, wall --- D 11 Bu thick 1 into 16, 18 m. .