Design for applications of carbon steel pipelines
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As the title suggests, the brittle temperature of ordinary carbon steel pipelines is -20 degrees Celsius. In northern regions, the ambient temperature during winter is often below -20 degrees Celsius. Yet, when designing pipelines for media such as nitrogen, some design institutes still use designs based on ordinary carbon steel in such operating conditions. I have asked the designers at these institutes as well as the process engineers involved in certain projects about this issue, but they were unable to explain the rationale behind such design choices. Therefore, I would like to hear everyone’s opinions on this matter.
Furthermore, projects in cold regions should take into account \"anti-freezing\" design measures. The purpose of such design is, first, to prevent the medium from freezing, and second, to prevent the pipes and equipment materials from being damaged by freezing.