UL 2431耐火涂料和材料的耐久性

UL 2431-2014?Safety for Durability of Fire Resistive Coatings and Materials
UL 2431-2014 防火涂料和材料的耐久性安全

UL 2431標(biāo)準(zhǔn)范圍

1.本標(biāo)準(zhǔn)旨在提供一種方法，用于測(cè)量耐火材料在經(jīng)受各種調(diào)節(jié)環(huán)境后保持其耐火性能的能力。耐火性能是通過測(cè)量受材料保護(hù)的鋼管、寬法蘭段和鋼板的溫度來確定的。

2. 描述了各種類型的調(diào)節(jié)環(huán)境。調(diào)節(jié)環(huán)境包括空氣侵蝕、濕循環(huán)、凍循環(huán)和干循環(huán)、濕度、抗沖擊性、工業(yè)大氣、鹽霧、溫度穩(wěn)定性、紫外線和振動(dòng)。

3. 定義了兩種火災(zāi)暴露，正常溫升火災(zāi)和快速溫升火災(zāi)。正常溫升火災(zāi)旨在代表一場(chǎng)充分發(fā)展的內(nèi)部建筑火災(zāi)?？焖偕郎鼗馂?zāi)旨在代表油氣藏火災(zāi)。

4調(diào)節(jié)環(huán)境和火災(zāi)暴露試驗(yàn)并不代表所有暴露和火災(zāi)條件。關(guān)于火災(zāi)暴露，條件隨火災(zāi)荷載的數(shù)量、性質(zhì)和分布的變化而變化:通風(fēng)；隔間大小和配置；以及安裝耐火材料的隔間的導(dǎo)熱和散熱特性。

In brief, UL 1709 describes test methods for two types of exposure, as follows:

Full-scale fire exposure—Full-scale fire exposure testing is intended to evaluate the thermal resistance of PFP materials applied to full-scale structural steel columns, and the ability of PFP materials to withstand fire exposure.

Small-scale fire exposure—Small-scale fire exposure testing is intended to evaluate the ability of PFP materials applied to small-scale structural steel columns to withstand fire exposure as well as a variety of environmental conditions. Durability is assessed using tests similar to those found in UL 2431, Durability of Spray-Applied Fire Resistive Materials.?