Some industrial corporations use submersible pumps for pumping out water from deep beneath the earth’s surface and such processes typically demand the use of special lifting equipment that can lower and lift the pumps during pumping operations. Pumps, which are normally situated at great depths, require a tall gantry and a long standard chain to be lowered and lifted. Such purposes are supported by the use of a special kind of chain called the pump lifting chain.
Because these chains are expected to endure wet conditions, they are made out of stainless steel. Commonly, the chains are made of grade 80 or grade 316 stainless steel and sometimes, chains made of grade 80 high-tensile steel are also used to support operations in less demanding situations. The chains come in different link sizes that have different capacity ratings and can support the lifting of pumps of various sizes. Notably, the chain features a larger master link at every one meter increment, which allows it to be fixed to the hoisting equipment at one metre intervals. This is what makes the lifting process slower and safer at the same time.
So how does the pump lifting chain work? The process is initiated by placing a tripod system or a frame over the hole through which the pump is to be inserted. The first master link on the chain is then attached to the hoisting equipment and it is lifted to a level where the third big link comes to the same height as the top of the hole. After that, a pole or a bar is inserted through the link and it is laid over the top of the hole itself. This is what allows the top master link to relax, which, in turn, allows you to remove the top master link easily. The hoist is then lowered to the level of the second link, which is located just above the top-most link. The bar is then removed and the hoist is lifted to a certain height. The process is repeated till the pump is lifted up. The process is slow, but it works.