This SAE Standard measures the percent thermal efficiency of materials in sleeve form used to contain heat or insulate around a hot component. The percent thermal efficiency (%TE) is determined by measuring the power difference expended by the heat source (cartridge heater) with and without the test sleeve at the specified temperature. See SAE J2302 to measure radiant heat flow of sleeves.

Safety—This method may involve hazardous materials, operations and equipment. This document does not address the safety concerns associated with its use. It is the responsibility of the user of this document to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Limitations—The temperature measurement range of this procedure is 260 °C to 700 °C. Sleeve size is limited to 19 mm ± 2 mm ID and 280 to 300 mm long. This procedure is performed under static (passive) air flow with no vibration. Do not adapt the temperature sequencing as a thermal cycle.

This test method is based on SI units per IEEE/ASTM SI 10.

Note to Users—Use the appropriate alpha-numeric codes to specify temperature condition (Table 1), sequence (Table 2), smoke generation option (see 6.3.2) and auxiliary thermocouple location(s) (position and distance) when referencing this document. For example, a line code of B(2)P(12)D(10,23) after the SAE document number means: Heating to a step sequence (B2), first at 260 °C, then 427 °C measuring power. The auxiliary thermocouple position (P) is at 12 o'clock, on the sleeve surface in two locations, 100 mm and 230 mm from the cartridge heater flange to the end. Bracket all numbers in parenthesis.

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