Principles for installing lifting lugs on vertical containers
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I have a question for everyone: are there any principles for determining whether to install lifting lugs on vertical containers? Should it be based on the diameter or the weight? I’m not quite sure; I don’t have a clear idea
If the diameter ratio is not high, side-wall type lugs can be considered; for those with a large length-to-diameter ratio and high weight, shaft-type lugs are a good option. There are no strict rules regarding this
For towers with a high aspect ratio, we have also installed side-wall type lugs, which is related to the lifting methods used by the installation company. Apart from the lifting weight limits and the corresponding constraints on the lifting lugs, there are no other mandatory requirements
The lifting lugs of the tower are generally determined by the installation unit. Small vertical containers are generally not designed with lifting lugs; if needed, ones can be selected in accordance with the HG standards.
For ordinary equipment, selection can be made in accordance with HG-T 21574-2008; for larger equipment, the HG-T 21574-2008 standard can be referred to in order to choose larger lifting lugs. When selecting lifting lugs, it is necessary to pay attention to calculating the local stress in the equipment, as lifting lugs are used only when the equipment is shut down. Therefore, when calculating the local stress, it is possible to use the values corresponding to a condition without pressure.
Choosing lifting lugs is like a woman going shopping for clothes. There are long ones and short ones ； There are V-neck and round-neck versions ； There are black ones and red ones ； There are all kinds of them. But women always pick and choose, saying they don’t like this, that style doesn’t suit them, or that color isn’t nice enough, and in the end they choose the one they like best and consider the most beautiful. In fact, every piece of clothing is the same; there will always be someone who thinks it’s beautiful. The same goes for choosing the lifting lugs; anything that is suitable and reasonable will do. It’s like a tall man buying a dress in the middle of winter; that makes no sense.
When selecting lifting lugs, don’t forget to specify requirements for welding, flaw detection, inspection, as well as constraints during lifting...
Thank you all for your replies, I’ve learned something
Just choose according to the standards; there are no specific rules
I would like to ask everyone: is it possible to install just one lifting lug for the equipment? Since the equipment is small, it’s difficult to arrange two.