SPARK TESTER

Testing of Rubber lined Vessels :

The handle of the spark tester is attached to a brush consisting of very fine brass mesh. This brush is then moved over the lining of the vessel or tank and every fault in the lining is detected by the formation of a bright spark from the brush to the defective spot. Depending upon the size of the area brushes of various widths are selected. Usually brushes of six inches and twelve inches widths are popularly used. In case, the lining of pipes of small diameters is to be tested, then copper wires bound together in the form of a broom is used, and in the case of pipes having a large diameter circular disc electrodes are passed through them. In case of faulty lining of such pipes a formation of a bright spark will be visible from either of the ends. Defects of lining in the inside of pipes cannot be repaired and the lining should be burnt and replaced by a new one.