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What is the correspondence between the Chinese national standard B1 fire resistance rating and international standards (such as ASTM E84 or BS 476)?

2026-07-28
The Chinese national standard B1 (GB 8624) classifies materials as flame-retardant. In the North American ASTM E84 test, a flame spread index (FSI) ≤25 and a smoke index (SDI) ≤450 constitute Class A (the highest level), and high-quality flame-retardant polyester fiberboard can reach this level. The British BS 476 Part 7 corresponds to Class 1. If the customer has specific export requirements, please inform us of the target country when requesting a quote, and we can adjust the flame-retardant formula for testing according to specific standards.
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Hvilke vigtige testrapporter kræves for produkter, der eksporteres til Europa eller Nordamerika?
How does your factory ensure product consistency (color difference and thickness tolerance) for long-term export orders?
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