The evaluation of weld appearance defects in urban outdoor metal furniture follows specific visual and technical criteria to ensure structural integrity, durability, and aesthetic quality. Key judgment criteria include: 1) Surface irregularities - checking for cracks, porosity, or visible pits that compromise weather resistance; 2) Weld bead consistency - assessing uniform thickness and smooth transition between metal pieces; 3) Discoloration - identifying heat-induced oxidation patterns that indicate improper welding techniques; 4) Dimensional accuracy - verifying adherence to specified weld size and reinforcement requirements; 5) Finish quality - examining surface smoothness for paint adhesion and corrosion protection. Industry standards such as AWS D1.1 and ISO 5817 provide standardized acceptance criteria for these defects. inspectors typically use visual inspection tools including magnification lenses, weld gauges, and lighting systems to identify imperfections that could lead to premature failure in outdoor environments. Proper weld appearance not only ensures structural safety but also maintains the aesthetic appeal of public furniture while extending its service life against environmental exposure.
What are the criteria for judging the appearance defects of the welds of urban outdoor metal furniture?
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