Pipe Insulation Thermal Conductivity Apparatus (Guarded Hot Pipe)

GHR-3K determines the heat transfer properties of pipe insulation with reference to GB 10296-2008 and ISO/DIS 8497, Thermal insulation — Determination of steady-state heat transfer properties of thermal insulation for circular pipes. It suits rubber-plastic pipe insulation, extruded plastic pipe insulation, rock wool, glass wool and other insulation pipe sections. Its design also draws on the mathematical model of longitudinal heat flow used for the thermal conductivity of metals, site technical requirements and the maker's existing test apparatus.

The apparatus measures the surface heat transfer coefficient and thermal conductivity of the pipe and analyzes heat conduction, using virtual-instrument techniques for measurement and analysis. From a test it reports the linear thermal conductance, surface heat transfer coefficient, thermal conductivity, surface thermal resistance and other heat transfer properties over a thermal conductivity range of 0.001–2.5 W/(m·K).

The test fixture is built to the size of the pipe under test. Specimens are 500 mm long, with inner diameters of 41–89 mm and walls 20–50 mm thick. The heated length is a 200 mm metering section with a 150 mm guard section at each end, insulated with low-conductivity material. The test temperature is set 35–300 °C from ambient. The metering heater is driven by a constant-current source and adjustable from 0 to 500 W.

A computer controls the test and acquires, analyzes and processes the data. The legacy software runs on Windows 10, 7 or XP with a simple Chinese interface, and test reports are output, stored and searchable. The supply is 220 V AC, 50 Hz. The standard configuration comprises the test unit, the test software, a data acquisition system and a computer.

Ordering information: Specify the pipe inner diameter, insulation wall thickness, test temperature, required ambient temperature control and the current software platform when requesting a quotation.