标准编号：ISO 12629:2011
中文名称：建筑设备和工业装置用绝热产品 预制管绝缘层的水蒸汽传输性质的测定
英文名称：Thermal insulating products for building equipment and industrial installations — Determination of water vapour transmission properties of preformed pipe insulation
发布日期：2011-01
标准范围
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.
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