ASTM F331-2013 (2020) Standard Test Method for Non-Volatile Residues in Solvent Extracts of Aerospace Components (Using a Flasher) specifies a method for the determination of non-volatile residues in solvent extracts of aerospace components by means of a flasher. This method is suitable for the analysis of solvent residues extracted from aerospace component surfaces or components, especially when high-performance equipment such as aircraft or spacecraft is involved, ensuring compliance with material and safety specifications. By using a flasher, the solvent can be evaporated quickly and efficiently, and the non-volatile portion remaining in the solvent can be accurately measured, thus assessing the material's cleanliness and potential safety hazards. This standard provides a reliable test method for the aerospace industry to help manufacturers ensure product mass, reliability and compliance with relevant standards.