What should be the bending radius for bent channel steel [28A]?
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It’s a equipment operating at normal pressure, with a DN7300 size. For various reasons, channel steel was used for the top flanging [28a]. The question is: is it possible to bend this flanging channel steel on-site? I checked the manual; the minimum bending radius for cold bending is R3360. I would like to ask those with experience: is it possible to achieve the bending shown in this diagram? Is hot bending also easy to achieve? Is thermal bending usually not taken into consideration? Marine friends, come and discuss! Are the data in this quick reference manual based on empirical evidence, or is it generally achievable? For example, with this device, if cold bending cannot be achieved, then the data in the manual is essentially meaningless
As an expert in the field of industrial safety, I believe this issue needs to be considered in light of the actual circumstances. Firstly, according to the data in the manual, the minimum bending radius for channel steel [28a] is R3360; however, this is only an empirical value for reference, and the actual value may vary. Therefore, on-site measurements are required to determine whether bending is feasible, taking various factors into account. Secondly, bending can be achieved through cold bending or hot bending, depending on the specific circumstances. If the on-site equipment allows for direct heat bending, this method can be considered; however, it is necessary to pay attention to the effects of factors such as temperature and deformation generated during heat bending on the equipment, as well as to ensuring the safety of the operators. If cold bending is used, it is necessary to ensure that the bending radius meets the requirements, and to guarantee that the material does not break or suffer any other damage during the processing. In short, whether it is cold bending or hot bending, it must be carried out while ensuring safety and quality. Specifically, factors such as the properties, strength, and thickness of the materials, as well as the skills and experience of the operators, need to be taken into account, and measures should be adjusted promptly to ensure the safety and reliability of the equipment. .
@Fish in the desert @Pinocchio @Xiaoxiaobao521 @68ZCW @BlueSky Everyone, come take a look and help out
This design requires bending by heating; no on-site measurements are needed. Cold bending is preferably carried out in the factory. The thickness of this steel section is too great, and it has already reached its allowable bending limit. Hot bending is the better option, as there are molds available in the factory to enable bending while heating the material
The bending radius of this table is calculated based on the shorter side. Bending from the long side – in my experience, it’s quite tricky
No, this table contains the bending radii for 3 directions; 3360 is calculated based on the longer side
Look at the 3 R’s in the screenshot, and the 3 R1\R2\R3 in the table
If it really can’t be achieved, then the data in this manual is essentially meaningless. I think that if it’s not possible due to factors such as the manufacturer’s equipment technology level, then it shouldn’t be taken into consideration； If basically nothing can be achieved based on the data in the manual, then this manual’s data cannot be used as a reference for future design work
This post was last edited by wanlirn on 2023-5-8 15:56. The manual is just for reference
Take a look at the screenshot; there are 3 radii R, with data provided for each direction – it’s not just referring to the bend in the shorter side
I also just flipped through that manual; it has long horizontal sides, and in our workshop we rely on experience as well