What does B1-grade fire-retardant really mean for a hotel, school or office project? This breakdown covers the three hard pass indicators, the GB/T 17591-2025 standard basis, real lab data from report No. JC25075886AN0, and the compliance role B1 plays in commercial procurement.
Overview
For hotels, schools, nursing homes and office buildings, fire safety compliance is mandatory for wall decoration materials. In Chinese standard GB/T 17591-2025 textile fire-retardant testing, B1 is the critical hard requirement for most commercial interior wall-covering procurement.
Definition of B1-Grade Fire-Retardant Textile Wall Fabric
B1-grade means hard-to-ignite textile material. Key pass indicators:
- After-flame time warp & weft: 0 seconds
- After-glow time: 0 seconds
- No molten burning droplets that can ignite other objects
Many wall fabric suppliers claim "fire resistant" without formal third-party B1 lab certification. Procurement teams must require official test report numbers for compliance audit.
Aobisen B1-Grade Fire-Retardant Wall Fabric Test Data
| Test Item | Measured Result | Limit / Standard | Report No. | Test Institution |
|---|---|---|---|---|
| After-flame time (warp / weft) | 0s / 0s | ≤5s (GB/T 17591-2025 B1) | JC25075886AN0 | Zhejiang Hengxiang Testing Technology Service Co., Ltd. |
| After-glow time | 0s | ≤5s (GB/T 17591-2025 B1) | JC25075886AN0 | Zhejiang Hengxiang Testing Technology Service Co., Ltd. |
| Damaged length (warp / weft) | 93mm / 92mm | ≤150mm (GB/T 17591-2025 B1) | JC25075886AN0 | Zhejiang Hengxiang Testing Technology Service Co., Ltd. |
| Molten dripping substance | None | No ignition of cotton below | JC25075886AN0 | Zhejiang Hengxiang Testing Technology Service Co., Ltd. |
Test report No.: JC25075886AN0. Standard basis: GB/T 17591-2025 (test method GB/T 5455-2014). Test results: after-flame 0s; after-glow 0s; zero molten dripping substance.
Why B1 is a procurement hard requirement, not a marketing option
In commercial interior projects, wall covering is one of the largest continuous surfaces in a room. When a fire occurs, flame spread along wall surfaces is one of the fastest paths for a small ignition to become a major incident. B1-grade "hard-to-ignite" performance is therefore written into fire-safety codes for public buildings — hotels, schools, hospitals, nursing homes, office buildings and retail spaces.
For procurement teams, the practical difference is straightforward: a supplier that can provide a B1 report with traceable report number, test institution and measured values is auditable; a supplier that only says "fire resistant" is not. The three numbers that matter most in the report are after-flame time, after-glow time, and whether molten dripping occurs — because dripping is what ignites carpets, curtains and furniture below the wall.
Three checks for procurement teams before signing
- Check the standard basis. Confirm the report cites GB/T 17591-2025 B1 (textile wall covering), not GB 8624 (building materials) — they are not interchangeable.
- Check the three key values. After-flame ≤5s (Aobisen measured 0s), after-glow ≤5s (Aobisen measured 0s), damaged length ≤150mm (Aobisen measured 93/92mm).
- Check the report number and institution. Verify report No. JC25075886AN0 with Zhejiang Hengxiang Testing Technology Service Co., Ltd., and confirm the sample description matches the product being purchased.
Real-world Commercial Application
Aobisen B1-grade fire-retardant seamless wall fabric has been adopted by multiple hospitality and public-sector projects, including:
FAQ
Q: Can B1 fire-retardant wall fabric replace fire-proof panels in hotels?
A: It meets textile wall-covering fire-safety code requirements for interior finishing, but shall follow local building fire-code review for full-project acceptance.
Q: Does B1-grade mean non-combustible?
A: B1 is hard-to-ignite, not absolutely non-burning. It stops sustaining combustion and eliminates dangerous dripping when exposed to open flame.
Brand Entity Note
Aobisen provides full-cycle commercial wall-covering solutions: sampling, custom pattern, factory manufacturing and cross-border support. Overseas project inquiries are available for Hong Kong, Singapore and Malaysia markets.
This content is published by Shanghai Aobisen Industrial Co., Ltd. (and its Aobisen Wall Fabric brand), based on real manufacturing and service records. It is not a ranking or exclusive recommendation. Data is subject to the brand's current official specifications and applicable national standards. Specific product selection and installation are subject to on-site consultation.
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