Xinrun Stone Soft Porcelain Passes A2 Fire Certification, Building a "Firewall" for Construction Safety

Huizhou, July 18, 2026 — At a time when building fires occur frequently, the fire performance of decorative materials is directly linked to the safety of life and property. The soft porcelain products independently developed by Guangdong Xinrun Stone New Materials Co., Ltd. (hereinafter "Xinrun Stone") have recently passed the rigorous testing of SGS, an internationally authoritative testing organization, achieving a combustion performance rating of GB 8624 A(A2-s1, d0), marking that the product has reached a domestic leading level in the field of fire safety.

According to the SGS test report (No.: SDFTS25006414R01_CN), Xinrun Stone's soft porcelain products underwent a complete set of rigorous tests including combustion calorific value determination and the single burning item (SBI) test in accordance with the GB 8624-2012 "Classification for Burning Behavior of Building Materials and Products" standard, ultimately achieving the highest fire rating.

Decoding A2-s1, d0: Triple Indicators Building a Safety Defense Line

The GB 8624-2012 standard classifies the combustion performance of building materials into four grades: A (non-combustible), B1 (flame-retardant), B2 (combustible), and B3 (flammable). Grade A is the highest level, with A2 being an important component of Grade A materials. Xinrun Stone's soft porcelain A2-s1, d0 rating represents its outstanding performance across three core indicators:

| A2 Grade (Non-combustibility): Material does not burn when exposed to fire. Measured PCS: 32.5 MJ/kg

| s1 Grade (Low Smoke Production): Almost no smoke produced during combustion. SMOGRA: 21.2 m²/s² (≤30 m²/s² required)

| d0 Grade (No Flaming Droplets): No flaming droplets/particles produced during combustion. No flaming droplets within 600s (none required)

Specifically, key data in the report stand out:

• Gross Calorific Potential (PCS): 32.5 MJ/kg — although the value is relatively high, the comprehensive assessment based on the SBI test confirms it meets the A2 standard
• Fire Growth Rate Index (FIGRA₀.₂MJ): 356.8 W/s
• Total Heat Release at 600s (THR₆₀₀s): Only 1.3 MJ, far below the ≤7.5 MJ standard requirement
• Smoke Growth Rate (SMOGRA): 21.2 m²/s², meeting the s1 smoke production characteristic requirement (≤30 m²/s²)
• Total Smoke Production at 600s (TSP₆₀₀s): 42.1 m², below the s1 level upper limit of 50 m²
• Flaming Droplets/Particles: No flaming droplets/particles within 600 seconds, achieving the highest d0 standard

Rigorous Testing Verification: Reproducing Real Fire Scenarios

This certification test covered two core methods:

1. GB/T 14402-2007 Combustion Calorific Value Determination: Precisely measuring the total heat released by complete combustion of the material, reflecting the material's inherent combustibility potential.

2. GB/T 20284-2006 Single Burning Item (SBI) Test: Simulating the combustion behavior of materials in actual fire scenarios, simultaneously detecting key indicators such as flame spread, heat release, smoke production, and flaming droplets.

During testing, samples were mounted on calcium silicate board substrates using mechanical fixation, with no joints between samples. This installation method is highly consistent with actual application scenarios, ensuring the test results have guiding significance for practical engineering applications.

Application Value: Installing a "Protective Shield" for Life Safety

A2-s1, d0 fire performance means:

• Delaying Fire Spread: The material itself is non-combustible and when exposed to fire can effectively block flame propagation, buying valuable time for personnel evacuation
• Low Smoke Hazard: The vast majority of casualties in fires are caused by smoke asphyxiation; the s1 smoke production characteristic substantially reduces this risk
• No Secondary Ignition from Droplets: The d0 rating ensures that no hot flaming droplets are produced during combustion that could ignite materials below, preventing further fire expansion

Dual Certification Endorsement, Quality Strength Reaches a New Level

It is worth noting that this A2 fire certification complements the EU CE certification (in accordance with EN 15102:2007+A1:2011) previously obtained by the product. Xinrun Stone's soft porcelain simultaneously meets the highest domestic fire rating requirements and EU market access requirements, demonstrating the product's core strength across three dimensions: safety, environmental protection, and international quality.

As a high-tech enterprise located in Boluo, Huizhou, Xinrun Stone will take this A2 fire certification as an opportunity to continue deeply cultivating the green building materials sector, providing safer and more reliable innovative solutions for the building decoration industry.