ASTM C892 PDF
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 Asmt documents listed below are referenced within the subject standard but are not provided as part of the standard.
The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard.
Note that there are 11 data points, since each curve has a beginning and ending data point. Conclusions and Recommendations Material and test standards for thermal insulation materials provide valuable support to specifiers, designers, and users working with high-temperature products.
They may be used to cover plastic pipe and cables to limit flame spread and smoke generation in fire-rated air plenums. He has over 35 years of experience working in the thermal insulation industry. Follow Us On Twitter http: 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.
Design limitations in the C apparatus limit the ability to make thermal performance determinations over the lower half of the C temperature range. Please first verify your email before subscribing to alerts.
Exploring Insulation Materials – Insulation Outlook
Their business histories over the first 11 years show striking similarities—and differences:. Historical Version s – view previous versions of standard.
Work Item s – proposed revisions of this standard. The two methods are thus complementary for application over the entire C temperature range. If two companies manufacturing the same generic material use different test procedures, it is challenging and perhaps even impossible for users to compare performance of the two materials. The insulation shall also be tested for non-fibrous content, linear shrinkage, and tensile strength.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Jack calculated his average the same three ways, but he got the same result each time: Different Tools Are More Accurate for Different Measurements—Despite the conflicting definitions, the two sets of numbers should be consistent after the appropriate mathematical adjustments are made; that they are not suggests that different methods are more accurate for different applications.
Additionally, government organizations need to be able to specify materials using industry standards and reference standard test procedures. Products are classified into five types by maximum use temperature and five grades by density. C lists quite different thermal conductivity values one for each of the two methods for this grade, shown in Table 2.
What Is Average?
Material and test standards for thermal insulation materials provide valuable support to specifiers, designers, and users working with high-temperature products. Mathematically, it is the thermal conductivity one approaches, in theory, as the dT used in the measurement approaches zero. If the document is revised or amended, you will be notified by email.
Applications include kitchen exhaust grease ducts, ventilation ducts, stairwell pressurization ducts, smoke extraction, chemical fume exhaust ducts, and refuse and trash chutes. Test method C measures average thermal conductivity1 taking two temperature points one at asstm very low temperature and one at a very high temperaturecalculating the average of those two data points, and designating that the average for the entire range.
Choosing the Right Method for Given Conditions 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. Need more than one copy? High-temperature insulation products are often used as an alternative to fire resistance-rated shaft enclosures. The guarded hot plate test method could be considered a primary resource for generating new thermal conductivity data, and C tests could be used for the top end of the xstm range.
These may present a situation similar to the Jack-and-Jill example. Please first log in with a verified email before subscribing to alerts. 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 with all insulation materials, its thermal conductivity changes with mean temperature.
These AES fibers are designed to be bio-soluble i. To meet quality standards, these materials must retain the same properties consistently from production batch to production batch.
As the voice of the U. 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.
Each different type of material is designed to perform in particular applications over a particular temperature range. He is a registered professional engineer. Additionally, they often must be made in a form that is relatively easy to install so as to be economical in their final application.