ASTM C447-15(2022) PDF
Standard Practice for Estimating the Maximum Use Temperature of Thermal Insulations
Standard Practice for Estimating the Maximum Use Temperature of Thermal Insulations
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 сентября 2022 г.
- Издание:
- C447
- ICS:
- 91.100.60
SIGNIFICANCE AND USE 5.1 This practice is intended for use as a guide in evaluating the behavior of insulations at elevated temperatures, and in judging suitability for use under the conditions of an intended application. It is not intended for acceptance or certification testing on a lot basis. 5.2 No single test for estimating maximum use temperature can be used that will apply to all types of insulations, nor can any single maximum use temperature be applied to any insulation that will be applicable under all possible conditions of use. Maximum use temperature depends on thickness, temperature gradient, heating rate, and other factors. When the various test methods listed herein are employed, the test results serve as guides and, as such, shall be applied with good engineering judgment in arriving at an acceptable temperature limit for the products and applications being considered. 5.3 The criteria used to establish acceptable performance is provided in the material specification or as agreed upon by the purchaser and seller. 5.4 In most cases, the properties covered by the applicable material standards (for example, thermal transmission, strength, and so forth) are the properties important to the end use of the product. Major changes in those properties resulting from in-service conditions often causes failure or substandard performance of the installed system. 5.5 Unless removal and reuse of the insulation is an important consideration, properties that relate primarily to handling and installation shall be eliminated from the evaluation. Note 1: Installation assemblies: some systems create conditions that affect the performance from the data obtained in the test procedures of this practice. 5.6 The listing of a test procedure in this practice does not imply that the performance of that particular procedure is required. Only those tests which are relevant to the requirements of the application involved, or which are agreed upon by the purchaser and the seller are p... SCOPE 1.1 This practice covers estimation of the maximum use temperature of thermal insulation including loose fill, blanket, block, board, and preformed pipe insulation. It is based upon selected performance criteria, and characterization of product properties during and after use conditions. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Abstract
Overview
ASTM C447-15(2022) - Standard Practice for Estimating the Maximum Use Temperature of Thermal Insulations provides a systematic approach for assessing the maximum temperature at which various thermal insulation materials-including loose fill, blanket, block, board, and preformed pipe insulation-can reliably function. Developed by ASTM International, this standard offers guidance for product evaluation under elevated temperatures, assisting stakeholders in determining the suitability of insulation materials for specific applications.
This practice is intended as a guide for evaluating the behavior of insulations at high temperatures rather than as a definitive acceptance or certification method. By characterizing product properties during and after exposure to service conditions, users are able to make informed decisions regarding the material’s performance and risk of failure.
Key Topics
- Maximum Use Temperature Estimation: Outlines procedures for estimating the highest temperature at which insulation materials can be safely used, considering factors such as thickness, temperature gradient, and heating rate.
- Performance Criteria: Emphasizes the use of selected performance indicators and the characterization of critical properties-including thermal transmission and strength-both during and after high-temperature exposure.
- Test Methods: Provides reference to a range of ASTM test methods (e.g., C411 for hot-surface performance, C177 and C518 for thermal transmission properties, C165 and D1621 for compression properties, and C203 for flexural strength).
- Property Evaluation: Advocates focusing on properties significant to performance in service rather than those related solely to handling and installation, unless removal and reuse are anticipated.
- Engineering Judgment: Encourages the application of good engineering judgment in interpreting test data to determine acceptable temperature limits.
- Customization: Allows for criteria and tests to be specified in material requirements or agreed upon between purchaser and supplier.
Applications
The procedures in ASTM C447 are valuable across a broad range of industries and use-cases where reliable thermal insulation is critical for safety, efficiency, and compliance, including:
- Industrial Equipment: Evaluating insulation materials for use in boilers, furnaces, and piping systems operating at elevated temperatures.
- Power Generation: Assessing the suitability of insulations in power plants, where thermal losses and safe operating conditions are paramount.
- Process Industries: Selecting appropriate insulation for chemical, petrochemical, or food processing applications where sustained high temperatures are common.
- Building and Construction: Ensuring the long-term performance and integrity of insulation materials in commercial and institutional buildings exposed to transient or sustained heat loads.
- OEM Product Design: Supporting the development and quality assurance of manufactured products with complex thermal management needs.
By following this standard, users can predict insulation performance, mitigate risks of failure, and optimize material selection for demanding applications.
Related Standards
ASTM C447 references several pertinent standards that provide detailed test methods for evaluating specific material properties essential to estimating maximum use temperatures:
- ASTM C411 - Hot-Surface Performance of High-Temperature Thermal Insulation
- ASTM C177 - Steady-State Heat Flux Measurements and Thermal Transmission Properties
- ASTM C518 - Steady-State Thermal Transmission Properties by Heat Flow Meter
- ASTM C203 - Breaking Load and Flexural Properties of Block-Type Thermal Insulation
- ASTM C165 / D1621 - Compressive Properties of Thermal Insulations and Rigid Cellular Plastics
- ASTM C335/C335M - Steady-State Heat Transfer Properties of Pipe Insulation
Keywords: ASTM C447, maximum use temperature, thermal insulation, high-temperature insulation, insulation properties, industrial insulation standards, ASTM International, insulation material selection, performance testing
Технические детали
- Технический комитет
- C16 - Thermal Insulation
- SKU
- ASTM C447-15(2022)
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