When tank cleaning with a portable machine, how is the weight of the machine suspended?

When tank cleaning with a portable machine, the weight of the machine is suspended using a natural fiber tag line, saddle, and hose. This method allows for a flexible and secure way to manage the machine's weight while also providing the necessary support for operation. The use of a natural fiber tag line contributes to the safety and maneuverability of the cleaning process. Natural fibers are strong yet offer a degree of flexibility, which is advantageous when adjusting the position of the cleaning apparatus within the tank.

Other options, while potentially viable in different contexts, do not pertain to the standard methods used for suspending portable cleaning machines in this specific scenario. Solid metal bars clamped to the Butterworth opening and a portable davit are more rigid solutions that may not offer the same ease of adjustment or handling within the confined spaces of a tank. Similarly, a wire rope suspension line, while strong, might not provide the necessary flexibility and careful handling required during tank cleaning operations, making it less suitable compared to the natural fiber method.