Low-temperature and low-stress conditions in long-distance pipeline specifications
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What does the term \"low-temperature and low-stress conditions\" in the specifications for long-distance pipelines mean? I don’t understand it; it’s not clear which conditions are considered low-temperature and low-stress conditions. Also, does low temperature refer to temperatures below -20°C?
The “low-temperature and low-stress condition” specified in the long-distance pipeline codes refers to a operating state in which the pipelines are subjected to low stress levels at low temperatures. As for temperature, whether it is below -20°C depends on the specific specifications and the properties of the material. Generally speaking, low-temperature environments can cause materials to become brittle; therefore, it is necessary to ensure that the stress in pipelines remains within safe limits even at low temperatures. This operating condition is designed to ensure that the pipeline maintains its structural integrity and operates safely even under extreme conditions. .