BS4790：小火源對鋪地織物的影響測定方法（熱金屬螺母）標準名稱：BS4790：Methodfordeterminationoftheeffectsofasmallsourceofignitionontextilefloorcoverings(hotmetalnutmethod)BS4790：小火源對鋪地織物的影響測定方法（熱金屬螺母）適用范圍：BS4790標準描述了一種使用熱金屬螺母測定小火源對紡織地板覆蓋物影響的方法。它適用于所有類型的紡織地板覆蓋物，無論是松散鋪設還是完全粘附，無論是否有襯墊。樣品要求：根據標準，至少切割3個試樣，尺寸為300mm?300mm，包括構成最終安裝的部分背襯或襯墊。測試過程：在測試紡織品的標準溫度環境中或大氣中取出試樣后2分鐘內進行測試在馬弗爐中將螺母加熱至900±20Cin的溫度將加熱的螺母放在樣品表面，確保螺母放在夾緊環的中心。在滑動面板與試樣接觸30±2s后。拆下螺母，保持關閉，直到所有點火影響都停止。其他相關標準：NFPA701：織物和薄膜火焰傳播測試方法標準16CFR1630：對地毯和墊子表面燃燒的標準測試16CFR1631：地毯和墊子表面易燃性的標準測試ISO12952-1：紡織品-床上用品燃燒評定-第1部分：點火源：悶燒香煙ISO12952-2：紡織品–床上用品的可燃性評估項目–第2部分：點火源：模擬火柴ISO6941：紡織布料-燃燒行為-垂直方向樣本燃燒火焰蔓延性能測定EN13772：窗簾、幕布用紡織品－燃燒速率的測定BS4790:MethodforDeterminationoftheEffectofSmallIgnitionSourcesonFlooringFabrics(HotMetalNuts)StandardName:BS4790：Methodfordeterminationoftheeffectsofasmallsourceofignitionontextilefloorcoverings(hotmetalnutmethod)Scopeofapplication:ThisBritishStandarddescribesamethodforthedeterminationoftheeffectsofasamllsourceofignitionontextilefloorcoveringsusingahotmetalnut.Itisapplicabletoalltypesoftextilefloorcoveringswhetherloose-laidorfullyadheredandusedwithorwithoutanunderlay.SampleRequirements:Fromeachsample,cutatleasethreetestspecimenseachmeasuring300mm×300mm,includinganybackingorunderlaythatdormspartofthefinalinstallation,followingtheproceduredescribedinBS4664.Testprocess:Testwithin2minutesofremovingthespecimeninthestandardtemperatureenvironmentofthetesttextileorintheatmosphere.Heatthenuttoatemperatureof900±20℃inthemufflefurnace.Usingthecrucibletongsplacetheheatednutontothespecimenwithin3sofitsremovalfromthefurnace.Opentheslidingpanelandremovethenutfromthespecimenafterithasbeenincontactwiththespecimenfor30±2s,andthenimmediatelyclosetheslidingpaneloncemore.Otherrelevantstandards:NFPA701:StandardforTestMethodsforFlamePropagationofFabricsandFilms16CFR1630:StandardTestforBurningSurfacesofCarpetsandMats16CFR1631:StandardTestforFlammabilityofCarpetandCushionSurfacesISO12952-1:Textiles-BeddingBurningAssessment-Part1:IgnitionSource:SmolderingcigarettesISO