Pipeline is one of the important equipment in industrial production. The daily inspection and maintenance of pipeline is related to the smooth progress of production. Infrared thermal imager can be used to detect such faults as pipeline blockage, thinning, corrosion and leakage, so as to avoid damage to production, environment and personnel. Infrared thermal imager can also be used to detect and evaluate the insulation of pipeline, so as to reduce energy consumption and achieve energy-saving effect.

1. The application of infrared thermal imager in pipeline detection.

1) The pipe is blocked. The difference in heat capacity between the plugged part and other parts leads to the temperature difference, and these temperature differences are transmitted

Pass to the pipeline housing and an infrared thermal camera can be used to photograph the fault points outside the pipeline.

2) Cracks, leaks and faults are caused by thermal fatigue of materials due to local temperature fluctuations

If the medium in the pipeline is low temperature medium (such as ammonia gas) or high temperature medium, the temperature difference between the leaking medium and the outer wall of the pipeline is different. YOSEEN infrared thermal imager can be used to photograph the leakage point.

3) The inner wall of the pipe is thinned due to wear or corrosion, and its temperature will be higher than that of the normal part.The fault points can be detected by infrared thermal camera.

4) The tube of the heat exchanger is blocked or leaking inside, which will reduce the heat exchange efficiency, affect the normal production and cause energy waste. The fault can be checked by the infrared thermal imager.

5) When the pipe insulation falls off, the temperature at the fall off point is too high, which can be clearly displayed in the infrared thermal image. The infrared thermal imager can also be used to detect the pipe temperature and judge whether the insulation reaches the specified effect.

6) The tube of the heat exchanger is blocked or leaking inside, which will reduce the heat exchange efficiency, affect the normal production and cause energy waste. The fault can be checked by the infrared thermal imager.

7) Heating furnace or reactor furnace tube working under high temperature, high pressure and strong corrosive environment will cause hot spots, cracking, carburizing, oxidation, hot cracking, thinning, etc., seriously affecting its service life. Using YOSEEN infrared thermal imager to test the furnace tube through peephore, the fault infrared thermal image can be obtained, which provides the basis for the implementation plan of furnace tube maintenance.

2. Problems that may be encountered when using infrared thermal camera for pipeline detection

1) Part of the pipe housing is bright iron sheet or stainless steel, with low emissivity and high reflectivity, which is easy to reflect the nearby high temperature radiation source into the infrared thermal imager, causing serious interference to the measurement results; When shooting this kind of pipe, it can be sprayed with paint (any color) at the corners, tees and welding joints prone to leakage to improve the emissivity of this part.

2) If the insulation layer of the pipeline is thick, the internal temperature difference is not easily transferred to the surface of the pipeline, and it is also difficult to measure.

3) When testing the furnace tube, the gas, steam and carbon dioxide in the furnace have absorption effect on infrared ray, so it is necessary to add a filter to the thermal imager for detection.

The use of infrared thermal imager brings great convenience for pipeline detection. YOSEEN infrared thermal imager adopts import detector to measure temperature accurately, have fast response, high thermal sensitivity and clear image, so it is the best tool for pipeline detection.