1.1 This specification addresses the minimum requirements for materials and fabrication of flexible removable and reusable blanket insulation for hot service, from above ambient temperatures to 1000°F (538°C).

1.2 This specification separately addresses industrial applications, outdoor commercial applications, and indoor commercial applications. Blanket insulation for industrial applications and outdoor commercial applications must be weather resistant and resistant to liquid chemicals. Blanket insulation for indoor commercial applications is limited to 500°F (260°C) maximum use temperature, is not required to be either weather resistant or resistant to chemicals, and is typically used for HVAC, plumbing, and other light grade indoor piping systems that distribute steam or water, or both.

1.3 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.

1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 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.