* After application--visually inspect from inside the structure, test material physical properties, measure thickness (polyurethane's, polyurias), adhesion test, spark test
and core test.
Standard practices NACE SP0188 and ASTM D 5162 each include a low voltage wet sponge test and a high voltage spark test
. The former technique consists of an open-cell sponge electrode saturated with water and connected through a buzzer or light and a battery to the back of the part or structure.
"That means we can run with only one of our ion exchange streams available, so we can carry out planned maintenance on the other." Two of the vessels, the cation and mixed bed exchange units, were scheduled for precautionary relining, and ELGA Process Water's task was to remove the ion exchange resins to a temporary store, clean and re-line the vessels with rubber, spark test
to ensure the integrity of the lining, reload the resins, hydraulically test and recommission the units.
As a quality control check to assure a monolithic lining, WT Energy performed a spark test
on the structure and made anynecessary repairs.
Indoor Demonstration-Manhole Inspection Spark Test
All plastic lined surfaces were to be spark tested
for holidays after installation.
How frequently is the contractor waiting on the coating crews, inspection personnel, spark tests
and dolly pull tests?
and dolly pulls weren't necessary with this product.