When sourcing asbestos fabric, you must prioritize thermal stability and weave density. Ensure the fabric has a temperature resistance range of 250°C to 550°C, depending on the grade (Grade A, AA, or AAA). Check the asbestos content percentage, typically ranging from 75% to 99%, as this directly impacts its fireproofing capabilities. Additionally, verify the thickness (usually 1.5mm to 5.0mm) and tensile strength to ensure it can withstand mechanical stress in industrial environments like power plants or shipyards.