Metal structured packing includes perforated corrugated packing, plate mesh corrugated packing, perforated corrugated packing, wire mesh corrugated packing, and annular corrugated packing.

Orifice plate corrugated packing is a regular packing material assembled by drilling holes on the surface of metal sheets and large ripples. It has the characteristics of low resistance, uniform gas-liquid distribution, high efficiency, high flux, and less obvious amplification effect. It is applied in negative pressure, atmospheric pressure, and pressurization operations.

Wire mesh corrugated packing is an important milestone in the development of regular packing. This type of packing is composed of wire mesh sheets arranged in a corrugated manner, with a corrugated sheet inclination angle of 30 ° or 50 °. Adjacent corrugated sheets have opposite directions. When filling inside the tower, the upper and lower trays of packing are staggered by 90 °. It has the advantages of high efficiency, pressure reduction, and high flux. The products include BX and CY types, which are commonly used in vacuum distillation, atmospheric distillation, and suction processes for difficult to separate and thermosensitive systems.

Perforated corrugated packing is a regular packing made by first rolling high-density small perforations from oblique metal thin plates and then assembling them into corrugated plates. Due to its special surface structure with equal perforations, it improves the lubrication performance of the packing and maintains the properties of metal wire mesh corrugated packing.