What is the purpose of chocking a spring before removing piping?

Chocking a spring before removing piping serves primarily to prevent any unintended movement. Springs are designed to store and release energy, which means that when they are under tension or compression, there is potential for them to move abruptly if support is removed. By chocking the spring, you ensure that it remains in a fixed position, eliminating the risk of it releasing energy suddenly and causing damage or injury during maintenance or removal of the piping.

The other choices, while they touch on aspects of handling or support, do not directly address the primary safety concern. Supporting the piping structure is important, but it is not the main reason for chocking a spring. Similarly, making lifting easier or facilitating inspection are not relevant to the critical purpose of preventing surprise movements that can arise from springs.