{"id":6921,"date":"2013-01-01T00:00:00","date_gmt":"2013-01-01T00:00:00","guid":{"rendered":"https:\/\/insulation.org\/io\/articles\/exploring-insulation-materials\/"},"modified":"2013-01-01T00:00:00","modified_gmt":"2013-01-01T00:00:00","slug":"exploring-insulation-materials","status":"publish","type":"articles","link":"https:\/\/insulation.org\/io\/articles\/exploring-insulation-materials\/","title":{"rendered":"Exploring Insulation Materials"},"content":{"rendered":"

High-Temperature Fiber<\/span><\/b><\/p>\n

High-temperature fiber insulations are fibrous
\ninsulations, varying<\/span> in flexibility, density,
\nand composition, with or without binders. These insulation products are
\navailable in flat sheets, rolls, boards, or loose fibers. The insulation products
\nare used as the thermal insulation component in the fabrication of insulation
\nsystems for use at temperatures up to 3,000\u00b0F.<\/span><\/p>\n

This
\ncategory of products is composed of Refractory Ceramic Fibers (RCF), including
\na recently developed class generally referred to as Alkaline Earth Silicates
\n(AES). These AES fibers are designed to be bio-soluble (i.e., they have
\nenhanced in-vitro solubility characteristics that enable these products to meet
\nEuropean regulatory requirements [Directive 97\/69\/EC] for man-made vitreous
\nfibers).<\/span><\/p>\n

The
\nRCF products in mat and blanket form are covered in ASTM C892. Products are
\nclassified into five types (by maximum use temperature) and five grades (by
\ndensity).<\/span><\/p>\n

<\/p>\n

The
\nstandard contains requirements for thermal conductivity, density, maximum use
\ntemperature, non-fibrous (shot) content, linear shrinkage, and tensile
\nstrength. For comparison purposes, the maximum thermal conductivity of Grade 3
\nmaterial is 0.66 Btu?in\/(hr?ft\u00b2?\u00b0F) at 400\u00b0F. It should be noted that not all
\nmanufacturers of high-temperature fiber products utilize the ASTM C 892
\nstandard for their products.<\/span><\/p>\n

High-temperature
\ninsulation products are often used as an alternative to fire resistance-rated shaft
\nenclosures. Applications include kitchen exhaust grease ducts, ventilation
\nducts, stairwell pressurization ducts, smoke extraction, chemical fume exhaust
\nducts, and refuse and trash chutes. They may be used to cover plastic pipe and
\ncables to limit flame spread and smoke generation in fire-rated air plenums.
\nThese insulation systems are listed and labeled by nationally recognized
\nlaboratories.<\/span><\/p>\n

Pneumatically
\napplied high-temperature fibers are typically used on applications where it
\nwould be difficult to adhere blankets to a surface. These typically are
\ninternal surfaces, such as furnace interiors, or outer surfaces that are
\nconvoluted and\/or difficult to access, such as boiler tube walls on a
\ncoal-fired furnace. While they are not yet covered by an industry
\nspecification, an ASTM specification is in development.<\/span><\/p>\n

The
\ncomposition can be described as follows: The basic types of materials are
\nloose, inorganic fibers (either RCF or AES) combined with a liquid, water-based
\nchemical binder. The fibers are made from mineral substances such as silica,
\nalumina, calcium, and magnesium processed from the molten state into fibrous
\nform. The liquid binder is made from inorganic materials: water, colloidal
\nsilica, and less than 2% of an organic foaming agent.<\/span><\/p>\n

The
\npneumatically applied product is separated into three types based on the
\nchemistry and upper use temperature use limit: The liquid binder consists of a
\nmixture of both organic and inorganic (colloidal silica) materials, and is
\ntypically added in sufficient quantity to provide the fibers with necessary
\nadhesion to the applied surface; cohesion to one another; and the required physical properties
\nof the installed, dry insulation. Also, this type of fiber insulation is
\ntypically dimensionally stable with exposure to the maximum rate temperature
\nfor the particular type (I, II, or III). When first heated above a temperature of
\nabout 500\u00b0 F, most or all of the organic binder decomposes, leaving only the
\ncolloidal silica binder.<\/span><\/p>\n

<\/p>\n

<\/a>The surface to which pneumatically applied high-temperature
\nfiber insulation is applied is typically prepared with weld pins and wire mesh,
\nthe latter being applied a distance off the surface 1 inch less than the
\nfinished thickness. The pins and wire mesh ensure the insulation material is
\nfirmly applied and will resist the effects of vibration and external forces.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

High-Temperature Fiber High-temperature fiber insulations are fibrous insulations, varying in flexibility, density, and composition, with or without binders. These insulation products are available in flat sheets, rolls, boards, or loose fibers. The insulation products are used as the thermal insulation component in the fabrication of insulation systems for use at temperatures up to 3,000\u00b0F. This<\/p>\n","protected":false},"author":[],"featured_media":0,"template":"","categories":[37,38,298,294,24,301,21,297],"class_list":["post-6921","articles","type-articles","status-publish","hentry","category-market-research","category-material-selection","category-installation","category-training","category-contracting","category-design","category-business-managment","category-basic-understanding"],"acf":[],"yoast_head":"\nExploring Insulation Materials - Insulation Outlook Magazine<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/insulation.org\/io\/articles\/exploring-insulation-materials\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exploring Insulation Materials\" \/>\n<meta property=\"og:description\" content=\"High-Temperature Fiber High-temperature fiber insulations are fibrous insulations, varying in flexibility, density, and composition, with or without binders. These insulation products are available in flat sheets, rolls, boards, or loose fibers. The insulation products are used as the thermal insulation component in the fabrication of insulation systems for use at temperatures up to 3,000\u00b0F. 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