Các h?ng m?c ki?m tra an toàn cháy n? quan tr?ng?

?Fire Resistance Limit Test? Simulates fire conditions per GB/T 7633 to record structural deformation, flame penetration time, and thermal conductivity data. ?Standard: GB/T 7633 (equivalent to ISO 834) ?Metrics: Structural integrity duration (e.g., ≥90 min for Grade A doors) Backface temperature rise ≤140°C (insulation criteria) Flame/smoke leakage time recording Air Tightness Test? Measures air leakage volume under differential pressure. ?Condition: 50 Pa pressure differential ?Threshold: ≤1.5 m3/(m·h) air leakage rate ?Methodology: Static pressure test (EN 12101-8/GB/T 7106) Laser particle counting for smoke-blocking validation ?Impact Resistance Test? Evaluates structural robustness against physical force. ?Procedure: 30 kg sandbag free-fall from 1.5m height Impact on door center (per QB/T 4868 cyclic test protocol) ?Pass/Fail Criteria: No cracks, permanent deformation >3mm, ho?c l?i ch?c n?ng (ví d?: ch?t b? bung)