Fall protection systems maintenance

Train workers in the proper selection, use, and maintenance of fall protection systems. 

Providing fall protection systems for maintenance which can also be used by constructors Designing for a reduced frequency of maintenance... 

Numerous materials fall into the category of electronic conductors and hence may be utilised as impressed-current anode material. That only a small number of these materials have a practical application is a function of their cost per unit of energy emitted and their electrochemical inertness and mechanical durability. These major factors are interrelated and —as with any held of practical engineering—the choice of a particular material can only be related to total cost. Within this cost must be considered the initial cost of the cathodic protection system and maintenance, operation and refurbishment costs during the required life of both the structure to be protected and the cathodic protection system. 

When a relief valve is removed for testing, the vessel that it was protecting no longer has that safeguard against overpressure. Ideally, the equipment item will be shut down and opened to the atmosphere. In many facilities block valves are installed immediately below the relief valve. The block valve is normally in the open position (either car-sealed or locked). When the relief valve has to be removed for maintenance, the block valve is closed so that the system can remain in operation. (If a gate valve is used, it should be installed horizontally so that, where the gate to fall off the stem, it would not inadvertently block the line.) Some facilities use dual relief valves tied in to a three-way valve so that at least one relief valve remains in service at aU times. 

---