Stainless steel grating, as a metal component with both load-bearing and filtering functions, is widely used in municipal, chemical, construction and other fields. Its classification needs to be comprehensively divided based on core elements such as material characteristics, structural design, application scenarios and processing technology. From the perspective of material models, different materials directly determine the corrosion resistance and service life of the grille. Among the mainstream categories, 304 stainless steel grille contains chromium and nickel elements, with basic acid and alkali resistance, suitable for wet but non corrosive domestic sewage treatment plants, indoor drainage ditch covers and other scenarios. It is currently the most widely used and cost-effective category in the market; 316 stainless steel grating, with the addition of molybdenum element on the basis of 304, significantly improves its salt spray resistance and seawater corrosion resistance. It is commonly used in bridge guardrails and seawater desalination equipment filtration layers in coastal areas, with a higher cost than 304; 201 stainless steel grille has a low chromium content and even less nickel content, with weak corrosion resistance but low price. It is only suitable for dry and non corrosive indoor scenes, such as mall ceiling decorative grilles, and should avoid long-term exposure to moisture.
In addition to material, the structural form also affects the load-bearing capacity and installation method of the grille. According to the grid structure and connection method, it is mainly divided into two types: welded and plug-in. Welded stainless steel grating fixes the load-bearing flat steel and horizontal bar through resistance welding, with firm nodes and strong load-bearing performance, suitable for parking lot trench cover plates and heavy equipment platforms; The plug-in stainless steel grille is connected to the horizontal bar and flat steel through a slot, without the need for welding, and is flexible in installation and disassembly. The horizontal bar is mostly made of round steel or twisted square steel, which has a stronger aesthetic appeal and is suitable for use as a pedestrian street pavement and garden landscape wharf. However, its load-bearing capacity is slightly lower than that of the welded type.
Starting from practical usage scenarios, there are significant differences in the performance requirements of grilles in different scenarios. Drainage grilles have smaller grid spacing and focus on intercepting debris and improving drainage efficiency. They are commonly found in road rainwater grates, kitchen drainage ditch covers, and some products are also designed with anti slip patterns to prevent pedestrians from slipping; The grid spacing of platform grilles is moderate, taking into account both load-bearing and anti slip properties. They are mainly used for industrial platforms and stair treads, and the surface is often treated with wire drawing or embossing; The grid shapes of decorative grilles are diverse, including square, diamond, circular, etc., with thin thickness and more emphasis on aesthetics. They are commonly used for indoor ceiling and background wall decoration, and can be customized in color and shape.
The processing technology directly affects the quality and price of the grille. Stamping formed grilles are processed through molds, which have high production efficiency and are suitable for mass production of standard specification products. The cost is low, but only simple mesh shapes can be processed; Laser cutting grating adopts laser cutting technology with high precision, capable of processing complex patterns and irregular specifications, suitable for customized needs, but with high cost and long production cycle; Hand woven grilles are made by hand weaving, with poor grid uniformity and are only suitable for low precision decorative scenes. Currently, they have gradually been replaced by mechanized production.
Overall, choosing a stainless steel grille requires comprehensive consideration of the corrosiveness of the usage environment, actual load-bearing requirements, specific functional positioning, and budget costs. By reasonably matching various classification attributes, the grille can fully leverage its performance advantages.
