How do you determine whether the quality of stainless steel welded wire mesh meets the standards?

There are many manufacturers of stainless steel welded wire mesh, but product quality varies; some meet standards while others do not. Products lacking quality compliance certificates still find their way onto the market, so how can a buyer determine if the mesh is up to standard? Here are a few key points to consider:
1.  **Wire Diameter Tolerance:** The tolerance for the wire diameter should be controlled within 0.02 mm. For example, if purchasing mesh with a nominal wire diameter of 0.89 mm, a micrometer measurement should fall within the 0.87 mm to 0.91 mm range to be considered compliant. While high precision is desirable, perfect control during production is difficult; since the mesh can be manufactured with 0.01 mm precision, a small margin of error is acceptable.
2.  **Tensile Strength:** The stainless steel welded wire mesh must have a tensile strength of at least 120 N; otherwise, it is considered substandard. There is no simple field test for this; verification requires professional tools and expert testing, so we will not elaborate on the procedure here.
3.  **Edge Protrusion:** To be considered compliant, the wire ends (protrusions) at the edges of the mesh must not exceed 2 mm. While the warp and weft wires must be securely welded at every intersection, achieving a secure weld at the edge requires the weft wires to extend slightly beyond the edge wire; however, this extension must not be excessive. Generally, a protrusion of no more than 2 mm indicates a compliant product. 4. There are also visible characteristics to consider: the mesh openings must be uniform, and the hot-dip galvanized coating on the welded stainless steel mesh must be even to ensure effective corrosion resistance.
The materials used for welded stainless steel mesh in engineering projects vary, including hot-dip galvanized, cold-galvanized, and re-drawn wire varieties. Among these, re-drawn wire mesh is the hardest and presents greater construction challenges compared to the other two types. Hot-dip galvanized welded stainless steel mesh is the easiest to install; it offers better flexibility, lays flat smoothly, and facilitates better adhesion of plaster or mortar.