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Corrosion and Seized valves
Corrosion and Seized valves

Not protecting the threads between cylinder threads and the valve threads can cause Galvanic Corrosion. This corrosion can seize a valve on a cylinder. It is important to protect the threads from corrosion. Read further to find why it happens. 

Proper Inspection of cylinder threads
Proper Inspection of cylinder threads

During a proper cylinder inspection process, time and care must be used when inspecting the threads. The threads are difficult to inspect due to size and angle, and the inspector must understand what they are looking for. Without proper training an inspector can mistake a machine mark as a crack.

Inspecting cylinders - beyond the hydro
Inspecting cylinders - beyond the hydro

During a hydrostatic requalification, a cylinder undergoes a visual inspection. Inspectors need to conduct visual inspections before, after and at regular intervals, based on their service use.