Tubing plates, which are circular steel plates with holes slightly larger than the outer diameter of the tubes, serve as round steel components in heat exchangers for securing tubes and sealing the medium. These plates are used to insert and weld the tubes in place, acting as accessories to perform this function.

The precision of tube plate processing, particularly the spacing and tolerance of tube holes, diameter, perpendicularity, and smoothness, significantly affects the assembly and operational performance of the listed chemical equipment.

Tubular plates for Class 3 and 4 pressure vessels require high precision. Traditional hole processing methods include marking by fitters and drilling with a drill press. As chemical vessels become larger, the diameter of tubular plates increases, and their thickness also grows thicker. The processing of tubular plates has introduced CNC technology, with CNC drilling machines commonly used for pilot holes in conjunction with drill presses for hole processing. High-precision hole processing with machining centers is increasingly being adopted by some large enterprises. There is an increasing demand for heavy-duty tubular plates in the nuclear power, seawater desalination, and central air conditioning heat exchanger fields.