How to judge the quality of welded wire mesh?

There are many manufacturers of welded wire mesh, but how do we distinguish whether the welded wire mesh is qualified? Some manufacturers can't provide welded wire mesh inspection certificate, and the welded wire mesh will still be released to the market, so how should we identify the quality of welded wire mesh when purchasing welded wire mesh? In terms of the quality of the welded wire mesh, the error of the wire diameter of the welded wire mesh should be controlled within 0.02 mm. For example, for the welded wire mesh we purchased with a wire diameter of 89 wires, we need to use a micrometer to measure the diameter of the wire. The allowable range of diameter is 87 wires. -91 wire, then the welded wire mesh is qualified within this range. However, no one can control it so well in the process of consumption. The loss of the distance or other reasons, the wire diameter of the welded wire mesh is about 0.01 mm, so the error is allowed.
The tensile strength of the welded wire mesh must reach 120N, otherwise it is an unqualified welded wire mesh. In terms of tensile strength, there is no simple way to test the tensile strength of welded wire mesh. We will not introduce it in detail unless it has been tested by tools and experts. The outcrops on both sides of the welded wire mesh cannot exceed 2MM, which is a qualified welded wire mesh. The diameter wire and the weft wire of the welded wire mesh must be welded firmly, but if the edge of the welded wire mesh is to be welded firmly, some weft wires can come out, so that the welding can be strong, but not too much. Generally, the welded wire mesh that does not exceed 2 mm is qualified. Welded mesh.
There are also some external phenomena: the quality of the mesh holes should be uniform, the hot-dip galvanized layer of the hot-dip galvanized welded wire mesh should be average, so that the anti-corrosion effect will be better, and the materials of the welded wire mesh used in the project are also different, which are divided into hot-dip galvanized welded wire mesh. Wire mesh, cold galvanized welded wire mesh, wire-drawn welded wire mesh, etc. Among them, the wire-drawn welded wire mesh with higher hardness is more difficult to construct than the former two. It is easier to construct by using hot-dip galvanized welded wire mesh, because Its flexibility is better, and it should be flat after tiling, and it is easier to hang ash.