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?Q: What are the key acceptance criteria for JIAHUI fire doors during installation and final inspection??? ?A:?? JIAHUI fire doors must comply with rigorous national and industry standards to ensure fire integrity, structural stability, and operational reliability. The acceptance process spans three phases: ?pre-installation checks, ?installation execution, and ?post-installation validation. Below are the critical criteria: ?1. Pre-Installation Preparation? ?Dimensional Compliance: Wall opening dimensions must be verified before installation, with tolerances ??≤±5mm? in width/height. Deviations exceeding this require structural correction prior to door fitting. ?Embedded Components: All pre-embedded steel plates (e.g., anchor points) must undergo ?full-penetration welding. Welded joints require complete anti-rust coating (e.g., epoxy primer) to prevent corrosion. ?2. Installation Execution? ?Alignment Precision: Vertical deviation of the door frame: ??≤3mm per meter? (measured with a laser level). Horizontal deviation: ??≤2mm per meter? (checked via precision level). Frame misalignment compromises sealing and must be rectified immediately. ?Gap Management: Clearance between door leaf and frame must be ??≤3mm? on all sides (hinge, lock, top). Gaps exceeding this require adjustment or reseating. All seams must be filled with ?intumescent fire sealant? (e.g., graphite-based strips) to block smoke/flame penetration. ?Closer Calibration: After installation, door closers must enable automatic closure when the door is opened ?**≥90°. Closers failing to reset within ??≤60 seconds**? or exhibiting resistance >80N force are non-compliant. ?3. Final Inspection & Testing? ?Comprehensive Functional Checks: ?Seals: Fire-resistant seals (e.g., ceramic silicone strips) must adhere fully to the frame with ?zero gaps or peeling. ?Hardware: Hinges, locks, and closers must operate smoothly without jamming, deformation, or excessive force (>80 ?????). ??????: ??? ?? ???? ?????? ????? ?? ?????? ?????? ????? ?????? (????? ??????? ???????? ?????? 12955-2008). ?????? ?? ?????? ?? ??? ????: ??? ?? ???? ??????? ???? ?? ??? ????? ???? (??? ???? ??? ????? ??? 50 ????) ????????? ?????? ?????? ????? ??????? ???????? ??????/T 7633 ?? ISO 834? ??? ?? ???: ?????? ??????: ?????? ??? ??????? ???????? ?????? ????? ??????? (??? ???? ??????? 90 ????? ?????? A). ???? ??????: ???? ?????? ≤ 1.5 ?3/(?·?) ??? ??? ??? 50 ??????. ??? ????? ?????? ???????? ??? ???????? ???????? ??? ???????. ??????? ?????????: ??????? ?????????: ?????? ?????? (?????? ISO/?? ??)? ??????? ?????? ??????? ?????? ???????. ?????? ??? ?? ??? ?????? ??????? ?????? ???? ???? ??????. ?????? ????? ??? ????????: ????? ??????? ???? ?? ????? ???? ?? ???? ????? ??????? (??? ????? ????? ???????? ??????? ??????? ????????) ?????? ???. ???? ????? ??? ???????? ???????? ??? ??? ??????.