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防火聚氨酯保溫板等級分類

更新時間:2025-07-04      瀏覽次數(shù):472

聚氨酯冷庫板作為冷庫保溫材料,其防火等級至關重要。一般來說,這類板材的防火等級被劃分為B級,涵蓋B1、B2和B3三個層級。接下來,我們將逐一探究這三個等級的差異與特點。

1、B1級防火聚氨酯冷庫板

B1級防火聚氨酯冷庫板,其氧指數(shù)達到或超過30,這是其防火等級的明確標準。氧指數(shù),這一專業(yè)術語可能對大家來說較為陌生,但可以通過簡單的方法進行判斷。最直接的方式是向生產(chǎn)廠家索取監(jiān)測報告,或者親自嘗試點燃板材,觀察其是否具有明顯的阻燃性。此外,我們也來簡要了解一下氧指數(shù)的具體含義。氧指數(shù)是指在特定的試驗條件下,條形泡沫材料在氧氣和氮氣混合氣體中穩(wěn)定燃燒所需的氧氣濃度。一般來說,氧指數(shù)在22至27之間的材料被歸類為可燃,而氧指數(shù)高于27的材料則被視為難燃。因此,B1級防火聚氨酯冷庫板因其高氧指數(shù)而具備出色的阻燃性能。

2、B2級防火聚氨酯冷庫板

B2級防火聚氨酯冷庫板,其氧指數(shù)達到或超過28,這一指標顯示出其良好的難燃性。

3、B3級防火聚氨酯冷庫板

B3級防火聚氨酯冷庫板的氧指數(shù)則要求達到或超過26,這意味著它也具有一定的難燃性。然而,與B1和B2級相比,其可燃指數(shù)相對較高。因此,B3級防火聚氨酯冷庫板主要適用于那些對防火要求不高的客戶。


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