Fire Ratings for Decorative Wall Panels: B1, ASTM E84 Class A and Euroclass Explained

When a supplier says a wall panel is "fire rated," the next question decides everything: rated under which standard? B1 (China, GB 8624), Class A (US, ASTM E84) and Euroclass B-s1,d0 (Europe, EN 13501-1) come from three different test methods, run by different labs, on different scales. A report from one system does not transfer to the others.

What each system actually measures

All three describe reaction to fire of the assembled product — substrate plus decorative film plus adhesive — not of one layer alone.

Why one report cannot be "converted" into another

The test methods differ fundamentally: a tunnel test, cone-calorimetry-based procedures and China's GB methods rank materials on different scales. A panel tested to B1 in China has valid B1 data — but whether it would achieve Class A under ASTM E84 is a question only an ASTM E84 test can answer.

If your specifier accepts "technical equivalence" between systems, get that acceptance in writing from them — most code officials and insurers will not accept it, and a certificate cover page is not a substitute for a report.

What to ask a supplier at quotation stage

1. Which standard is the certificate under? Get the exact standard number, test lab and report date.

2. Was the test done on the exact combination you are ordering? A B1 result on one film color does not automatically cover a different film or a different substrate thickness.
3. Can you have the full report? Not a summary, not a logo — the report, so your specifier can check the tested assembly against what is being shipped.

If you are building in each market

• If the project is in China: GB 8624 B1 is the working baseline for interior decorative panels, and from June 2026 E0 formaldehyde is the mandatory entry level for panel products — the two documents usually travel together.

• If the project is in North America: ask whether the product has been tested to ASTM E84 on the exact specification. Many panels carry B1 documentation only; if no Class A report exists, the honest answer is "not yet tested," not "equivalent."

• If the project is in the EU or UK: ask for the Euroclass classification, and check whether your specifier also requires the s1 smoke class on corridor and escape-route walls.

• If the code requires a non-combustible assembly (Euroclass A1/A2): resin-bonded decorative panels are out of scope no matter whose brand is on them. That wall needs stone, cement-based or mineral material — decide it early, at the design stage, not after the panel order.

FAQ

Q: Is B1 the same as Class A?

A: No. They come from different test methods in different countries. A B1 result documents performance under GB 8624; it does not document ASTM E84 performance.

Q: The panels are B1-rated — can I use them in a US project?

A: Only if your approval path accepts the GB 8624 documentation. If the project falls under US code, request ASTM E84 testing on the exact specification before approval, and get your specifier's written position on equivalence if you rely on it.

Q: Does the film or the substrate carry the fire rating?

A: Neither alone — the rating applies to the assembled product as tested. That is why you should confirm the tested combination matches your order.

Q: What fire document should I collect before placing the order?

A: Standard number, test lab, report date, and the exact product combination tested. Four lines that turn "fire rated" from a marketing word into a checkable fact.