When unbolting a flange in an isolated system, you must:

When unbolting a flange in an isolated system, it is important to begin with the side that is furthest away from you. This practice is essential for safety and to prevent the flange from distorting. By unbolting the side away from you first, you ensure that any potential for release of trapped substances is directed away from the worker, minimizing the risk of injury from sudden pressure release or fluid ejection.

Additionally, this method helps maintain the integrity of the flange and the piping system, reducing the likelihood of uneven stress or damage that could occur if bolts are removed in a less strategic order. This procedure supports a controlled and safe disassembly, which is critical in pressure piping work where safety protocols are paramount.