Increasing bending angle in thick-walled pipes with wide heating

Open Access

Table 3

Comparison of the pipe bending in different methods.

Method	Bending (mm/m)	Heating radius (mm)
Spot heating [4]	Few hundredths*	20
Holt	2.5	20 (effective radius)
Improved spot heating [8]	0.29	65 (effective radius)
Wide heating (single zone)	0.756	84
Simultaneous wide heating	2.196	80

* Depending on the heating conditions.

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