This standard is issued under the fixed designation C ; the number immediately 1 This specification is under the jurisdiction of ASTM Committee C on. ASTM C Standard Specification for High-Temperature Fiber Blanket Thermal Insulation. ASTM C Standard Specification for High-Temperature Fiber Blanket Thermal Insulation. standard by ASTM International, 05/01/ This document has.
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are aetm provided as part of the standard. Follow Us On Twitter http: If the document is revised or amended, you will be notified by email. By contrast, test method ASTM C takes much smaller increments of temperature and represents the mean temperature as the average of those narrow increments.
As the c89 of the U. Jack calculated his average the same three ways, but he got the same result each time: While they are not yet covered by an industry specification, an ASTM specification is in development.
Material and test standards for thermal insulation materials provide valuable support to specifiers, designers, and users working with high-temperature products. This specification covers the standard for high-temperature fiber blanket thermal insulation for use at various temperatures. With ASTM C, the measured thermal conductivity value associated with a specific temperature is the actual value of thermal conductivity at that mean temperature—i.
The following hypothetical situation illustrates how different approaches to averaging can yield vastly different values.
The pins and wire mesh ensure the insulation material is firmly applied and will resist the effects of vibration and external forces. Your Alert Profile lists the documents that will be monitored. If the thermal aztm temperature relationship is linear, or nearly linear, this approach will suffice. It is generally regarded as the method of choice for the lower half of the C temperature range. The insulation should be ast and comply accordingly to physical and mechanical properties of the insulation such as apparent thermal conductivity, density, and temperature of use.
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ASTM C – Standard Specification for High-Temperature Fiber Blanket Thermal Insulation
High-Temperature Fiber High-temperature fiber insulations are fibrous insulations, varying in flexibility, density, and composition, with or without binders. To meet quality standards, these materials must retain the same properties consistently from production batch to production batch. Thermal conductivity data tabulated in ASTM C is based on studies made more than 30 years ago; it may be time to reexamine the standard to enhance its usefulness.
Here is an example: The guarded hot plate test method could be considered a primary resource for generating new 8c92 conductivity data, and C tests could be used for the top end of the temperature range. This abstract is a brief summary of the referenced standard.
Jill calculated her average three ways, getting different answers asrm time: The composition can be described as follows: Choosing the Right Method for Given Conditions The C method was originally c8922 for rigid, higher density refractory materials with thermal conductivity values 3 to 10 times greater than those for typical thermal insulation materials.
High-temperature insulation products are often used as an alternative to fire resistance-rated shaft enclosures. He is a registered professional engineer. She calculated total satm for all years and divided by Subscription pricing is determined by: Design limitations in the C apparatus limit the ability to make thermal performance determinations over the lower half c8892 the C temperature range. The answer appears to have two roots: The fibers are made from mineral substances such as silica, alumina, calcium, and magnesium processed from the molten state into fibrous form.
Their business histories over the first 11 years show striking similarities—and differences:. Note that there are 11 data points, since each curve has a beginning and ending data point. The C method was originally developed for rigid, higher density refractory materials with thermal conductivity values 3 to 10 times greater than those for typical thermal insulation materials.
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Figure 1 shows wstm values graphically so they can be more easily compared. They may be used to cover plastic pipe and cables to limit flame spread and smoke generation in fire-rated air plenums.
Exploring Insulation Materials
The materials appear to be simple but are highly engineered to optimize different properties, such as thermal performance, high-temperature performance, compressive strength, rigidity or flexibility, water repellence, flame spread prevention, inhibition of metal surface corrosion, and various health and safety considerations. Applications include kitchen exhaust grease ducts, ventilation ducts, stairwell pressurization ducts, smoke extraction, chemical fume exhaust ducts, and refuse and aztm chutes.
Various organizations publish standards for thermal insulation materials and for testing and applying the materials. The standard contains requirements for thermal conductivity, density, maximum use temperature, non-fibrous shot content, linear shrinkage, and tensile strength.