Before a pipe is cut, reamed, or threaded, how must it be secured?

When preparing to cut, ream, or thread a pipe, it is essential for the pipe to be secured properly to ensure safety and precision. Securing the pipe by the chuck is the most effective method as it stabilizes the pipe in place, allowing for a steady and controlled operation.

The chuck grips the pipe tightly, preventing any movement that could result in uneven cuts or damage to the pipe. This method is particularly useful when using a threading machine or drill, where maintaining a firm hold on the pipe is critical to achieving a clean and accurate result.

In contrast, while other options like using a support stand or a pipe vise may provide some level of support, they do not offer the same level of security as a chuck does. A pipe vise can hold the pipe securely but may not provide the necessary alignment and grip that a chuck offers during cutting or threading operations. Additionally, securing by hand lacks the stability needed for precision tasks, and while it might be used for very light operations, it is not advisable for tasks involving tools that exert significant force.

Thus, utilizing a chuck for securing the pipe ensures the safety of the user and enhances the accuracy of the task at hand.