Table 6.

Valving process

Activity	Energy flow	Target	Energy transfer
Positioning the cylinder in the vise	Vise for cylinder valving process and extender	Staff (lesion)	The employee positioned the cylinder incorrectly, which ended up compromising the “Loosening of the valve” process, as the poorly positioned cylinder generated a bump on the tool (extender) that the employee used. The use of PPE in this case was essential so that the employee was not injured
Positioning the cylinder in the vise	Vise for cylinder valving process	Valve (damage)	The cylinder positioned incorrectly caused the machine not to fixate it correctly, which created a risk of the wrench damaging the valve. The barrier and/or control in this case does not exist
Thread grip	Staff	Valve (damage)	The misplacement of the sealing tape (Teflon) on the cylinder thread generated the possibility of future leakage and/or damage to the valve caused by the lack of thread adhesion. In this case, the training given by the company is the form of control
Fixation of the valve	Incorrect handling of the wrench	Valve (damage)	The improper fitting of the wrench, combined with the employee's excessive force on the valve, generated a jolt and, consequently, the tool disengaged on the valve, damaging it. In addition, the force expended incorrectly in excess corrodes the thread. The barrier and/or control in this case does not exist
Loosening the vise	Vise for cylinder valving process and extender	Staff (lesion)	The force expended to loosen the vise generated a bump on the tool (extender), which could injure the employee if he was not using PPE
Cylinder sent for typing	Cylinder	Staff (lesion)	When rolling the cylinder through the yard without using any machinery to help with transportation, the employee could damage the valve by hitting any object that was on the floor. The barrier and/or control in this case does not exist

Source: Own elaboration