GB/T 33651-2017In-situ measurements of heat loss through thermal insulation of equipments and pipes—Infra image method (English PDF)

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the use of infrared thermal imaging method to test the surface temperature and heat flux density and its distribution, determine and analyze the thermal insulation layer of heat (Cold) loss of the terms and definitions, test instruments, field testing, test results and processing, test reports.

This standard applies to GB/T 8174 of the provisions of the two, three tests, and on-site evaluation of normal conditions of equipment and pipe insulation layer must Thermal performance.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 4132 Thermal insulation materials and related terms

GB/T 8174-2008 Test and Evaluation of Adiabatic Effect of Equipment and Pipeline

GB/T 17357-2008 Equipment and pipelines - Thermal insulation on surface heat loss - Determination of heat flow method and surface temperature method

GB/T 19870 Industrial Inspection Infrared Thermal Imager

JJF 1187 thermal imager calibration specification

3 Terms and definitions

GB/T 4132 and GB/T 19870 and the following terms and definitions apply to this document.

4 Test instrument

4.1 Infrared thermal imager should meet the requirements of GB/T 19870. Infrared thermal image temperature resolution should not be less than 0.1 °C, temperature measurement uncertainty Should be less than ± 2 °C, the revised temperature measurement uncertainty should be less than 0.5 °C. Infrared thermal imager with reference to GB/T 19870 and JJF 1187 Calibration.

4.2 According to the requirements of the determination level, other performance parameters should be used to meet the requirements of Table 1 test instrument. Test instrument should be based on the provisions of the standard Set the cycle to the relevant departments to carry out calibration or self-check.