Tube plate is drilled in circular steel tube outer diameter slightly larger than the same hole, will penetrate into the welded pipe fixed, play a role of such accessories

Tube sheet machining accuracy, especially the tube hole spacing and diameter tolerance, verticality, smoothness affect listed above are assembled and using performance of chemical equipment. With large-scale chemical equipment, power plant, the tube plate diameter becomes larger and larger, diameter of tube plate of 4m-5m is very common. Characteristics of large tube plate tube holes number, density, small pore size, depth, accuracy and high fineness

According to the needs of the different use of the environment, the use of different materials, container board generally use Q345R, such as class one or two pressure vessels, non corrosive medium circulation, use carbon steel composite plate. Encountered strong, high pressure and high temperature, such as nuclear power environment requires the stainless steel, 16 manganese, corrosion resistant titanium alloy materials, application of new synthetic materials, to bring new life to the tube plate products

For tube plates of three or four types of pressure vessel needs high precision hole machining, the traditional method is fitter, rocker drilling drilling. In recent years, with the large-scale chemical container, the diameter of the tube plate is also increasing, the thickness is gradually thickened, processing of tube sheets also introduced the NC technology, now in general use NC drilling machine hole guiding with the rocker drilling hole machining. Using the processing center to do the processing for high efficiency and high precision holes have gradually been accepted by some large enterprises. At present, large thick tube sheet in nuclear power, desalination, and central air-conditioning heat exchanger area needs a growing trend