標準號：ISO 12629-2011
中文標準名稱：建筑設備與工業裝置用熱絕緣產品.預制管絕緣層的水蒸汽傳輸性質的測定
英文標準名稱：Thermal insulating products for building equipment and industrial installations.Determination of water vapour transmission properties of preformed pipe insulation
標準類型：Q25
發布日期：2011/1/15 12:00:00
實施日期：2011/1/15 12:00:00
中國標準分類號：Q25
國際標準分類號：91.100.60
引用標準：ISO 12628;ISO 29768;EN 12086
適用范圍：This International Standard specifies the equipment and procedure for determining the water vapourtransmission properties in the steady state under specified test conditions for test specimens of preformedpipe insulation. It is applicable to thermal insulating products.It is intended to be used for homogeneous materials (see Note below) and for products which may haveintegral skins or adhered facings of some different material.NOTE A material is considered to be homogeneous in terms of mass distribution if its density is approximatively thesame throughout, i.e. if the measured density values are close to its mean density.The water vapour transmission rate and permeance values are specific to the test specimen (i.e. the product)thickness tested. For homogeneous products, the water vapour permeability is a property of the material.If the pipe insulation is cut from a flat product, then the water vapour transmission properties can be obtainedfrom tests carried out on the flat product with similar properties in accordance with EN 12086.