GB/T 10296 - 2008 Introduces the determination of steady-state heat transfer properties of thermal insulation layers by circular tube method. The standard specifies the technical requirements for test equipment, including circular tubes, heating and chilling down systems, etc. Detailed sample preparation, such as size, Installation method. During testing, specify the heating and chilling down conditions, Measurement parameters and operation procedures. Measuring temperature, thermal Flow rate and other data to calculate thermal conductivity and other heat transfer properties of thermal insulation layers. This standard provides a basis for evaluating the thermal insulation performance of thermal insulation materials in circular pipe application scenarios, helps pipeline thermal insulation engineering material selection, improves energy utilization efficiency, and is widely used in construction, chemical and other pipeline thermal insulation fields.