Take a look at how large-radius pipes are bent ?
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This post was last edited by Desert Fish on 2018-10-17 at 10:53
Image upload failed; it can be viewed in edit mode. Does this fall under medium-frequency heating pipe bending?
I uploaded it again; it seems to be medium-frequency heating, which facilitates pipe bending. My main question is what the purpose of spraying water after bending the pipe is
Lowering the temperature is the main goal, right? Just saying a few things – without water spray, the natural cooling rate is slow, which leads to increased deformation and rusting, resulting in ovality and wall thickness reductions that do not meet the required standards.
According to the information I read, spraying water will form iron tetroxide on the red-hot surface
The bent pipes I’ve been working with still need to undergo heat treatment later.
So this is still just a requirement for rapid fixed shaping; heat treatment will be carried out after passing the acceptance test in the next step
The manufacturing process specifications for bent pipes shall be determined according to order requirements and shall include, but not be limited to, the bending radius, pipe diameter, and wall thickness; manufacturer name, sequence of operations, temperature range for induction bending, bending speed (mm/min), bending load, cooling procedure, temperature measurement points, post-bending heat treatment (type, temperature, and control methods), dimension control procedures, non-destructive testing procedures (including visual inspection of the appearance), hydrostatic testing procedures (including end sealing methods and details regarding post-testing handling), procedures for handling/transportation/storage and labeling, and a quality plan.