Seeking help with heating large-diameter pipes
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This post was last edited by Xiaobai Niu on 2018-5-10 at 14:44. There is currently a torch pipe with a diameter of DN1200; its operating temperature ranges from 40/250°C. It is heated using low-pressure steam at 0.4 MPAG and 152°C, with the requirement that the temperature maintained through heating be between 110 and 130°C. According to standards, specifications for steam heating are provided for pipes with a diameter of up to DN800, but no such rules exist for larger-diameter pipes. I would like to ask experienced experts: what should be the diameter of the heating pipes, and how many such pipes are needed? Is there a relevant standard as a basis?
A φ12 tube can be wound spirally
Are there any standards or criteria? Please offer some guidance from those who are more experienced
Solved. The hydrophobicity issue of coiled tubes is difficult to address; consider using ordinary jacketed tubes, and calculate using the formula recommended in SH/T3040