Problems with the machining process of lifting holes
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I have some questions for everyone. Currently, equipment lifting is a common occurrence at construction sites. Often, holes are drilled directly in the equipment for lifting purposes; some equipment already has lifting holes prepared before it is transported to the site, while in other cases holes need to be drilled on-site depending on the conditions there. Usually pre-drilled, with smooth and round lifting holes ； Holes in construction sites are usually made directly using flame cutting. Question 1: Are there any standard requirements for the machining process of drilling lifting holes? Question 2: What processing techniques are typically used to drill lifting holes? Does the processing technique have an impact on the mechanical properties of the material? Question 3: Does flame cutting affect the mechanical properties of the material? How large is the affected area? Subjectively, I believe that flame cutting should have some impact on the mechanical properties of materials, and it should be avoided as much as possible; however, I have not found any relevant evidence to support this.
After flame cutting, use a grinder to smooth it out
It means that using flame cutting is also no problem; is it feasible?
As long as the requirements such as the dimensions specified in the drawings are met, it’s fine
Pressure vessels cannot have lifting holes drilled directly on site
What kind of device is it, and why are you making holes in it? What is being lifted – the equipment itself or its internal components and accessories?
It’s not the main body of the equipment; the main body definitely has lifting lugs. It’s just a steel pile; a hole is drilled at its end to allow it to be lifted using cranes.
Well, generally, it’s not allowed to drill holes directly in the equipment either.
How is it possible to lift something by making holes directly on the equipment? Can’t a lifting lug or a hook nut be installed instead? Plasma cutting is allowed.