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Improving these distortions using flame straightening is based on the principle that metals expand when heated and contract when cooled.
If expansion is constrained therefore, compressive stresses build up and result in plastic deformation when the temperature is high enough.
Upon cooling the deformation remains, thus removing the distortion.
Flame straightening in action
This case study shows distortions present in steel plates with a large surface area prior to being flame straightened using LINDOFLAMM® burners, and after with the distortion removed.
Before & After:
The choice of flame straightening equipment is dependant on the type and thickness of material. For straightening large plates, such as decks and deckhouses on ships for example, LINDOFLAMM® adjustable burners with three or more single-flame nozzles are ideal. These are mounted on a small wheel car for easy movement across large surfaces.
Flame straightening can be used on the following materials: