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Question:

What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?

What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?

Answer:

DN (nominal diameter) 250 is generally the industry said 273, welded steel pipe (spiral steel pipe) thickness is generally between 6-8mm, more common.
DN250 is the nominal diameter, the outer diameter of the steel pipe is 273mm, the thickness is above 6.5mm.

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