根据的标准（GB 14102.1-2024，于2025年5月1日起强制实施），防火卷帘门的耐火极限不再采用旧版的“甲/乙/丙级”或“特级/普通”称呼，而是统一采用 F1、F2、F3、F4 时长分级，且所有钢制防火卷帘的耐火完整性统一要求为 3小时（3.0h）1。

According to the latest national standard (GB 14102.1-2024, mandatory from May 1, 2025), the fire resistance limit of fire-resistant rolling shutter doors will no longer be referred to as "A/B/C" or "special grade/ordinary" in the old version, but will be uniformly classified into F1, F2, F3, and F4 duration, and the minimum fire resistance integrity requirement for all steel fire-resistant rolling shutters is 3 hours (3.0h).

具体耐火极限时长及分类标准如下：

The specific fire resistance limit duration and classification criteria are as follows:

1. 按耐火极限时长分级（F1-F4）

1. Classify according to the fire resistance limit duration (F1-F4)

F1级：耐火极限时长 ≥1.0小时1。

F1 level: Fire resistance limit duration ≥ 1.0 hour.

F2级：耐火极限时长 ≥2.0小时1。

F2 level: Fire resistance limit duration ≥ 2.0 hours.

F3级：耐火极限时长 ≥3.0小时1。

F3 level: Fire resistance limit duration ≥ 3.0 hours.

F4级：耐火极限时长 ≥4.0小时1。

F4 level: Fire resistance limit duration ≥ 4.0 hours.

2. 按耐火性能分类（A类与C类）

2. Classified by fire resistance performance (Class A and Class C)

A类（隔热型）防火卷帘：同时满足耐火完整性（E）和耐火隔热性（I）双重指标。在火灾工况下，背火面平均温升≤140℃，单点温升≤180℃，无需配套自动喷水冷却系统即可独立作为防火分隔1。

Class A (insulation type) fireproof rolling shutter: meets both fire integrity (E) and fire insulation (I) dual indicators. Under fire conditions, the average temperature rise of the backfire surface is ≤ 140 ℃, and the maximum temperature rise at a single point is ≤ 180 ℃. It can be used independently as a fire partition without the need for an automatic sprinkler cooling system.

C类（非隔热型）防火卷帘：仅满足耐火完整性（E）指标，无隔热能力。此类卷帘必须配套独立的消防防护冷却水幕系统，且供水持续时间不得低于其耐火极限时长（如F3级需≥3小时供水），严禁单独用作防火分隔1。

Class C (non insulated) fireproof rolling shutter: only meets the fire integrity (E) index and has no insulation ability. This type of rolling shutter must be equipped with an independent fire protection cooling water curtain system, and the water supply duration must not be less than its fire resistance limit (such as F3 level requiring ≥ 3 hours of water supply). It is strictly prohibited to use it alone for fire separation.

3. 实际工程应用中的耐火要求在实际建筑设计中，防火卷帘的耐火极限需根据设置部位的防火墙或防火隔墙的耐火极限要求来确定。例如，在防火墙上设置或需设置防火墙的部位，防火卷帘的耐火极限通常需要达到 3.00小时 及以上4。

3. Fire resistance requirements in practical engineering applications. In actual building design, the fire resistance limit of fireproof rolling shutters should be determined according to the fire resistance limit requirements of the firewall or fireproof partition wall at the installation location. For example, in areas where firewalls are installed or need to be installed, the fire resistance limit of fire-resistant rolling shutters usually needs to reach 3.00 hours or more.