When you have need of removing gunk from pipes and other hard to reach areas that may be run through a channeling system, there will be certain items that are good to use. Oil sludge removal products answer the need for removing stubborn sludge that has gotten stuck inside pipes or compartments. These are typically for systems which transfer or channel fuel or lubricants.
These are oily stuff, and the viscosity level means that they move slower than freer liquids or water based materials or solvents. These last are in fact commonly used for cleaning out pipes say of the debris that accumulates inside them. A combination of old fuels or lubrication items, debris and dirt makes sludge a slowly developing problem for channels.
An accumulation like this takes time to become a factor in how transference is done through channels. This does not mean though that it should remain unchecked or unaddressed by you. Due diligence here means doing check ups regularly and monitoring the performance of a channel system for symptoms of blockage.
Besides the piping, sludge like this can develop inside the compartments which contain them or where they are stored. There is need to work out these spaces with some means to take out the worst debris. This will mean physically or even manually taking out what can be removed, and later on applying removal products on the hardest areas.
These may be the original surface that is not even sludge anymore but hardened gunk. This is worse than the moving viscous liquids that can still be drained, and the products in question can address these too. The sludge inside bigger tanks may be hard to take out but have to be.
Usually this means that the compartments there may be used for newer materials. These will be adulterated or changed into chemically harmful or useless items when mixed with toxic liquids that have stayed in the tank. These have to be softened first since they might already be hardening into gunk.
Softener solvents are part of the process, and are in fact the products under discussion. These are powerful chemicals too and offer their own risk factors where toxicity is concerned. They have to handled either by experts or experienced workmen who need to have protective gear in case of spills or misdirected sprays.
You need to know how these chemicals work and what kind of toxic levels they produce and adjust the work process accordingly. Removing the unwanted gunk off any kind of channel or compartment is also something that might be necessary. In the long run this means lesser messes that need to be cleaned up.
As soon as this thing forms in the bottom of tanks, it might work best to clean up immediately. Those used with the same kind of material like diesel fuel may not be cleaned up instantly and material is simply taken in because it is the same as the thing stored before. But it is bad practice and a habit that ought to be discontinued.