Final answer:
To prevent a black iron pipe assembly from coming apart, one must securely tape one end to a tabletop and carefully maintain the elevation of the other end. Protecting the pipe from corrosion by keeping it painted ensures its longevity. Additionally, using a pipe for added leverage on a wrench can be helpful but potentially risky if too much force is applied.
Step-by-step explanation:
When using black iron pipe in a mounting assembly, preventing it from coming apart involves the proper preparation and assembly method. Initially, one end of the pipe should be placed on a table top, making it parallel to the surface, and secured with masking tape. The other end is then lifted to a moderate height above the table without going too high. Furthermore, it is crucial to regularly maintain the iron by keeping it painted. The protective layer of paint acts as a barrier to water and oxygen, which are essential for rust formation. As long as the paint is not chipped or damaged, the black iron pipe will remain protected from corrosion.
In the context of mechanics and tools, using a length of pipe over a wrench handle can provide extra leverage when attempting to remove a tight bolt. While this technique increases torque, enabling more forceful turning, it should be done with caution. Excess force can not only strip or damage the bolt but also pose a hazard to the mechanic.