How to Develop the Blank Flat Length for a Cylinder


To develop the blank flat length for a cylinder rolled from sheet or plate is quite simple:

Essentially, you should calculate the centerline arc:

(Outside Diameter – Thickness) x 3.1416 = Length of Plate Required

(Inside Diameter + Thickness) x 3.1416 = Length of Plate Required

Note:  Additional plate may be required depending on the material thickness and the machinery used.

Centerline Arc of a Cylinder
Aluminum 20in Schedule 100 Pipe

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