Why is it necessary to align the pipe ends before lifting?
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Why is it necessary to align the pipe ends before lifting?
Pre-align the pipe ends to facilitate alignment after lifting...
It’s too much trouble to wait until it’s hung up before making adjustments.
Due to space constraints, if the pipe ends are not aligned before lifting, their positions will deviate. When the deviation is significant, it becomes difficult to align them by twisting after lifting.
1. Aligning the object before lifting helps determine the proper lifting direction; for example, a pipe end might come into conflict with buildings, structures, or other equipment and pipelines during lifting, so it’s necessary to prepare plans in advance； 2. When positioning the equipment, place it directly according to the previously established alignment; only verticality and levelness need to be considered. It saves time and reduces the likelihood of lifting accidents.
Rotating bodies tend to rotate during lifting, especially those with small diameters such as heat exchangers. How can this problem be solved?
Is it the lack of a secure fixation that prevents rotation, or is it the rotation of the equipment that causes the hook to rotate?
Lift it using the lifting lugs; the rotation of the equipment itself causes the hook to rotate as well.
It is also possible that the wire rope or the chain of the hand chain hoist itself exerts torque, causing the equipment to rotate. Add a towing rope when bundling the equipment; some call it a swaying rope. Ordinary riggers or installation fitters know this.
It’s okay to use a pulling rope for small devices, but it’s impossible for humans to pull large devices, right?
You are simply preventing rotation; when lifting large equipment, it is necessary to do so smoothly and gradually. The rotational force is not great; however, if the lifting speed is high and the lifting center is not properly identified during binding, the force becomes quite large.