How to Measure Expansion Ratio and 25% Drainage Time of AR-AFFF Foam

Master the AR-AFFF Foam Testing process according to IS 4989 Annex J standards! In this video, we break down how to accurately measure the Expansion Ratio and 25% Drainage Time to evaluate foam quality and fire-extinguishing efficiency. ​📌 What You’ll Learn in This Video: ​What is AR-AFFF Foam? Understanding Alcohol-Resistant Aqueous Film-Forming Foam. ​IS 4989 Annex J Compliance: Step-by-step testing procedure outlined by Indian Standards. ​Expansion Ratio Calculation: How to collect foam, measure volume, and calculate the ratio. ​25% Drainage Time Test: Measuring foam stability and liquid separation speed using a stopwatch and graduated cylinder. ​Acceptance Criteria & Pass/Fail Metrics: Standard reference values to ensure your firefighting foam meets safety benchmarks Hashtags Primary Hashtags (Place at the end of the description or in the YouTube Hashtag Box): #ARAFFF #FoamTesting #IS4989 #FireSafety #FireProtectionEngineering Secondary / Niche Hashtags: #FireFightingFoam #ExpansionRatio #DrainageTime #IndustrialSafety #FireSafetyStandards #SafetyEngineering #FireEquipment