GB 23864-2023
Firestop material (English Version)
- Standard No.
- GB 23864-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB 23864-2023
- Replace
- GB 23864-2009
- Introduction
Core changes in the standard revision
Technical fields Requirements of the 2009 version New/changed contents of the 2023 version Engineering impact Classification system 3 basic classifications Newly added classification of places of use (Important public buildings Z/Ordinary P) and Class D for multi-component materials Strengthen fire protection requirements for key places Fire resistance performance Single fire condition Distinguish between the two heating curves of building fiber (FXH) and power fire (FDL) Accurately match different fire scenarios Safety indicators Not required Add smoke toxicity (≥ZA2 level) and air tightness (≤3.5m³/m²·h) Improve the safety of personnel evacuation
Detailed explanation of key performance indicators
1. Physical and chemical performance requirements
The apparent density of flexible organic plugging materials is ≤2000kg/m³, and the compressive strength of inorganic plugging materials is 0.8-6.5MPa. The corrosion test adopts 70℃/90%RH environment for 168h, and no rust is required.
2. Combustion performance classification
Non-inorganic materials must meet GB8624 B2 grade, fire retardant fabric requirements: damage length ≤ 150mm, afterburning/smoldering time ≤ 5s.
3. Fire test method
Cable penetration test pieceStandard configuration:
- 6 KVV (7×1.5mm²) cables
- 7 YJV (3×50+1×25mm²) cables
- 1 DN32 steel pipe
- 500×100mm steel bridge
Thermocouple arrangement: A temperature measurement point must be set 25mm from the plugging material on the surface of the penetration object
Project implementation suggestions
Selection principles
Important public buildings should select Class Z materials and verify the smoke toxicity index. Power facilities should give priority to FDL fire-resistant products.
Installation points
- The cable filling rate shall not exceed the test verification value
- Non-flame retardant cables need additional fire retardant coating protection (≥315mm)
- 100% displacement space should be reserved for deformable gaps
Acceptance inspection
Key points to check:
- Air tightness test (important places)
- Water flushing test (EC/EIC grade products)
- Temperature rise record of the back-fire surface
GB 23864-2023 history
- 2023 GB 23864-2023 Firestop material
- 0000 GB 23864-2009(XG1-2013)
- 2009 GB 23864-2009 Firestop material
