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Is the thermal stress of general heating oil pipeline tensile stress or compressive stress?
Compressive stress. According to the information of China Petroleum official website, when the working temperature of the heating oil pipeline is higher than the installation temperature, the thermal stress is compressive stress, and vice versa. Objects generally have the characteristics of thermal expansion and cold contraction, and pipelines are no exception. When the temperature rises, the pipeline should be extended, and when the temperature drops, the pipeline should be shortened.
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