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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Standard test procedures are used to measure performance as determined by material properties. 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. Figure 2 presents the same information graphically. It should be noted that not all manufacturers of high-temperature fiber cc892 utilize the ASTM C standard for their products.
The standard contains atsm for thermal conductivity, density, maximum use temperature, non-fibrous shot content, linear shrinkage, and tensile strength. The materials astmm to be simple but are highly engineered to optimize different properties, such as thermal performance, high-temperature astn, compressive strength, rigidity or flexibility, water repellence, flame spread prevention, inhibition of metal surface corrosion, and various health and safety considerations.
Work Item s – proposed revisions of this standard. The liquid binder is made from inorganic materials: Different Tools Are More Accurate for Different Measurements—Despite the conflicting definitions, the c982 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.
This specification covers the standard for high-temperature fiber blanket thermal insulation for use at various temperatures. Historical Version s – view previous versions of standard.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. If the document is revised or asstm, you will be notified by email. Follow Us On Twitter http: Follow Us On Twitter http: Link to Active This link will always route to the current Active version of the standard.
Additionally, government organizations need to be able to specify materials using industry standards and reference standard test procedures. 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 temperature range.
Exploring Insulation Materials – Insulation Outlook
The liquid binder consists of a mixture of both organic and inorganic colloidal silica materials, and is typically added in sufficient quantity to provide the fibers with necessary adhesion to the applied surface; cohesion to one another; and the required physical properties of the installed, dry insulation.
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ASTM does not give any warranty express or implied or make any representation that the contents of this ast are accurate, complete or up to date. C lists thermal conductivity values in two sections, one as determined by C, and the other by C The insulation should be tested and comply accordingly to physical and mechanical properties of the insulation such as apparent thermal conductivity, density, and temperature of use.
The C values range from 33 percent greater to 1 percent lower, depending on the mean temperature. It is generally regarded as the aatm of choice for the lower half of the C temperature range.
The insulation shall also be tested for non-fibrous content, c8922 shrinkage, and tensile strength. Mathematically, it is the thermal conductivity one approaches, in theory, as the dT used in the ast, approaches zero. Jack and his sister Jill both started businesses on January 1, 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.
Figure 1 shows these 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.
Standard Specification for High-Temperature Fiber Blanket Thermal Insulation
Products are classified into five types by maximum use temperature and five grades by density. As with all insulation materials, its thermal conductivity changes with mean temperature. The composition can be described as follows: Jack calculated his average the same three ways, but he got the same result each time: He has over 35 years of experience working in the thermal insulation industry. As mean temperature increases, therefore, the correspondingly larger test temperature differences make it more difficult to devise effective thermal guarding techniques, resulting in greater measurement deviations due to increases in extraneous heat loss.
What Is Average? – Insulation Outlook
The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard. High-temperature fiber insulations are fibrous insulations, varying in flexibility, density, and composition, with or without binders. Test method C measures average thermal conductivity1 taking two temperature points one at a 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.
Here is an example: