Regarding the use of 2 or more chain hoists for lifting pipes

What this sentence means is that the standards do not allow the use of two or more chain hoists simultaneously for lifting pipes. This is because using multiple chain hoists can lead to instability during lifting, increasing the risk of accidents. For the issue of lifting long pipes indoors, other safer and more stable lifting equipment or methods can be considered. For example: 1. Use a single chain block equipped with a limiter to control the lifting of long pipes, thereby avoiding safety hazards that may arise from issues related to the synchronized operation of multiple chain blocks. 2. Use electric hoists or other automated lifting equipment in place of hand-cranked hoists to improve lifting stability and safety. 3. Under the guidance of professional engineers, and taking into account the specific conditions on site, consider using auxiliary equipment such as multi-point suspension and pulley systems for lifting operations. In summary, when lifting long pipes indoors, it is necessary to strictly adhere to relevant safety regulations and use appropriate lifting equipment and methods to ensure the safe and smooth progress of the work. .

This measure is mainly taken to prevent a problem with one of the hoists from causing the other hoist to become overloaded and experience an accident. But in actual use, safety requirements in this regard are also ignored for the sake of convenience on-site. For reference.

As long as the weight to be lifted does not exceed the lifting capacity of a single chain block, it is possible to use two or more chain blocks for lifting. For example, if you use two 5-ton chain blocks to lift an 8-ton load, this is not feasible since the weight of the load exceeds the lifting capacity of a single chain block； If you use two 10-ton cranes to lift an 8-ton load, as long as the weight of the load does not exceed the lifting capacity of a single crane, it is feasible.

There’s no need to worry about this at all. Companies like Sinopec have extremely strict safety standards; during maintenance work, it’s common that equipment located inside frames cannot be moved using cranes, and instead multiple chain blocks are required to move them. I’ve never seen the owner’s safety department raise any objections, with the maximum requirement being that you check the stress levels under extreme conditions when using those chain blocks.

Do you carry this out in the same way?；

That indicates that Sinopec’s safety management is not strict enough; other places have such requirements