Table 4.

Valving process

Activity	Energy flow	Target	Controls and barriers
Positioning the cylinder in the vise	Vise for cylinder valving process and extender	Staff (lesion)	PPE
Positioning the cylinder in the vise	Vise for cylinder valving process	Valve (damage)	Maintenance and Training
Thread grip	Staff	Valve (damage)	Training
Fixation of the valve	Incorrect handling of the wrench	Valve (damage)	Absence of barriers and controls
Loosening of the vise	Vise for cylinder valving process and extender	Staff (lesion)	PPE and training
Cylinder sent for typing	Cylinder	Staff (lesion)	PPE and training

Source: Own elaboration