Seeking help regarding the pre-bending of cylinders
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1. May I ask about the specification series for the cylinder pre-bending formwork? 2. How to select the pre-bending form based on the nominal diameter of the cylinder?
I had only seen it in use before and never really thought about this issue. In GB150, clause 10.2.4.2 mentions a template for checking the edge angle of welded joints, which should be 1/6Di with a minimum value of 300; I think this can be used as a reference； Pre-bending, also known as heading, I believe may not be necessary for thin sheets – it might even be unnecessary to apply any pre-bending; after the longitudinal seam welding is completed, simply rounding the sheet out will achieve the desired result ；
The template for the head is generally set at 3/4Di, while the template used to check the corner angles of the weld joints in the cylinder is set at 1/6Di, with a minimum value of 300