High Voltage Glass Insulator Shell and glass disc insulators are widely used in transmission and distribution systems because of their excellent electrical insulation performance,high mechanical strength,weather resistance,and self-diagnostic failure characteristics,However,during the manufacturing process,various defects can occur due to raw material inconsistencies,melting problems,forming issues,tempering errors,or improper handling,These flaws can affect the appearance,mechanical performance,dielectric properties,and long-term reliability of the insulator,Understanding common glass insulator defects and implementing proper quality control procedures are essential for manufacturers,EPC contractors,utilities,and international buyers involved in power infrastructure projects,