ASTM C892-2017 pdf free download

ASTM C892-2017 pdf free download.Standard Specification for High-Temperature Fiber Blanket Thermal Insulation
1. Scope
1.1 This specification covers high-temperature fiber blanket thermal insulation for use from ambient up to 3000°F (1649°C). 1.2 When the potential exists that the installation or use of thermal insulation materials, accessories, and systems will pose safety or health problems, the manufacturers shall provide the user with appropriate current information regarding any known problems associated with the recommended use of the products, and shall also recommend protective measures to be employed in their safe utilization. The user shall establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathemati- cal conversions to SI units which are provided for information only and are not considered standard. 1.4 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
8. Dimensions, Mass, and Permissible Variations
8.1 Rolls or flat sheets of blanket are normally furnished in standard dimensions as shown in Table 4,Table 5, and Table 6. 8.2 The standard length, width, and thickness combinations available are a function of the type and grade. Contact the supplier for information on standard or non-standard dimen- sion and combinations. 8.3 The maximum density (determined in accordance with Test Method C167) specified in Table 4 for Grades 3, 4, 6, 8, 10, and 12 are for weight design purposes only.
9. Workmanship, Finish, and Appearance
9.1 The insulation shall indicate good workmanship in fabrication by a uniform appearance, shall not have visible defects such as tears and holes that will adversely affect the service quality, and shall be free from foreign materials.
10. Sampling
10.1 The insulation shall be sampled for the purposes oftest in accordance with Practice C390. Specific provision for sampling shall be agreed upon between the supplier and the purchaser.
11. Test Methods
11.1 The properties enumerated in this specification shall be determined in accordance with the following test methods: 11.1.1 Dimensional Measurement and Density—Test Meth- ods C167. Density is based on nominal thickness. 11.1.2 Apparent Thermal Conductivity—Test in accordance with Test Method C177 or C201 (modified by the procedure shown in Annex A1). 11.1.2.1 Practice C1058. shall be used to obtain recom- mended test temperature combinations for testing purposes. 11.1.2.2 As specified in Practice C1045, the range of test conditions must include at least one test where the hot surface temperature is greater than, or equal to, the hot limit of the temperature range of desired data and at least one test where the cold surface temperature is less than, or equal to, the cold limit of the temperature range desired. The exception to this requirement is given in 11.1.2.2(1) below. 11.1.2.4 Final step of Practice C1045 analysis would be to calculate the thermal conductivity using the equations gener- ated at a set of mean temperatures for comparison to the specification. (1) While it is recommended that the specification data be presented as conductivity versus temperature, it is possible that several existing specifications will contain mean temperature data from tests conducted at specific hot and cold surface temperatures. In these cases, it is possible that the conductivity will be a as a function of temperature and that the Practice C1045 analysis will provide different results. To ensure that the data is compatible, a Practice C680 analysis, using the con- ductivity versus temperature relationship from Practice C1045 and the specific hot and cold surface temperatures, is required to determine the effective thermal conductivity for comparison to the specification requirements.