What should be done before removing the flange bolts on an exchanger channel head?

Before removing the flange bolts on an exchanger channel head, it is essential to verify that blinds are in place, bleeders are open, and that lockout/tagout (LOTO) procedures are complete. This ensures that the equipment is fully isolated from any pressure sources and that it cannot accidentally start up or release hazardous energy while the work is being performed.

Having blinds in position prevents any potential pressure release from the process side during the bolt removal, which could lead to injury or equipment damage. Opening bleeder valves allows for the safe release of any residual pressure, ensuring that the area is safe to work in. Finally, completing LOTO procedures confirms that the equipment is properly de-energized and that all safety measures are in place to protect the workers involved in the procedure.

Other options may involve steps that are either unnecessary or do not address the primary safety concerns associated with working on an exchanger channel head. Therefore, ensuring that these critical safety checks are completed before proceeding with bolt removal is paramount for the safety of the personnel and the integrity of the system.