As the wall thickness of a pipe increases, what happens to the inside diameter?

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When the wall thickness of a pipe increases, the inside diameter is indeed reduced. This is because the total diameter of the pipe consists of both the wall thickness on the outside and the internal hollow part of the pipe, known as the bore or inside diameter.

As the wall thickness increases, there is more material added to the outside of the pipe, effectively taking away from the space available for the inside diameter. In other words, the inside diameter gets smaller as more wall material is added. This concept is crucial in applications where the flow capacity and pressure rating of a pipe are critical, as a reduction in inside diameter can impact the flow rate of fluids moving through the pipe.

The other options do not accurately reflect the relationship between wall thickness and inside diameter. For instance, the bore is defined as the internal diameter, so as wall thickness increases, that bore does not increase. The weight of the pipe cannot be said to universally decrease with increased wall thickness, as additional material typically leads to an increase in weight. Lastly, the outside diameter will indeed increase as wall thickness increases, contradicting the assertion that the inside diameter reduces when wall thickness is considered.

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