I would like to ask everyone for advice regarding power pipelines
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I recently worked on a power pipeline; I had never done one before. The owner provided the documents from the original electrical design firm; the pipe specifications listed there are ID 679x26, OD 920x10, ID 489x20. What would it be if it were DN? In which specification can I find the corresponding data? Please come and help take a look.
OD 920x10 corresponds to DN900; I’m not sure about the other two values. The one close to 489 is likely either 480 or 478, with the outer diameter being DN450
ID 679x26: The inner diameter is 679 mm, the wall thickness is 26 mm, and the outer diameter is 705 mm. **There are no pipes in this outer diameter range; these are non-standard pipe sizes, but they can be approximated as DN700. OD 920x10: The outer diameter is 920 mm, with a wall thickness of 10 mm. It is the standard pipe diameter of the HG 20553 II series, or the standard diameter for JB flanged connections. For DN900. ID 489x20: The inner diameter is 489 mm, the wall thickness is 20 mm, and the outer diameter is 529 mm. All pipes that **do not belong to this outer diameter series are non-standard in terms of diameter; their diameters differ by 1 mm from those of the HG 20553 II series standard pipes, or from the standard diameter DN500 for JB flanged pipe connections. It can be brought close to DN500. Reference standards: Yue Jincai’s \"Pressure Pipeline Technology\" and Song Kekē’s \"Pressure Pipeline Design and Examples\"
DN900 – isn’t the outer diameter 914?
The US standard is 914.4, while the domestic standard is 920
ID 489x20, outer diameter 529 mm; it is similar to the DN500 II pipe of HG 20553, with an OD of 920x10 and an outer diameter of 920 mm, which is the same as that of the DN900 II pipe of HG 20553. ID 679x26, outer diameter 731 mm; it seems that such a pipe does not exist. .
Electricity and the chemical industry are quite different