Techniques used in the field

  • Density testing (NDT)
    • Corcon BV has developed an accurate leak testing system on slight overpressure that is computer-controlled and faultlessly detects leaks on storage tanks.
    • This leak testing system was approved by AMINAL under number AMV/18.04.99/33.
    • This system is safer than leak testing with negative pressure, since experience has taught us that certain containers collapse as a result of the negative pressure tests.
    • The tanks and associated piping are gradually brought to slightly higher pressure with nitrogen or air, after which it is kept until it stabilises.
    • If a loss of pressure continues to occur after the stabilisation period, this means that the container and, if applicable, the attached pipework are leaking.
    • The stabilisation or elimination of the excess pressure is shown on a curve on the computer screen.
    • This test can also be carried out separately on a tank or an uncoupled pipe.

 

  • Penetrant inspection (NDT)
    • The aim of this examination is to evaluate the quality of the welds in metal constructions where magnetic or vacuum testing is more difficult to apply.

 

  • Magnetoscopy (NDT)
    • By magnetising a ferromagnetic material (steel), deformations in the induction lines can detect possible defects in the welds, provided these are superficial in nature.

 

  • Dielectric test on coating (NDT)
    • Possible damages to the coating of a steel tank can be determined by means of a dielectric test.

 

  • Coating thickness measurement (NDT)
    • In order to be functional, coatings must be applied to steel tanks in a certain thickness, as often determined in the standards.
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  • Spark test on plastic welds (NDT)
    • The tightness of thermoplastic welds can be checked by means of a spark device provided that a copper wire is provided under the weld.

 

  • Stray current measurements (NDT)
    • Underground electrical currents that flow outside a desired circuit and cause corrosion of tanks and pipes can be detected with this inspection.

 

  • Barcol hardness test (NDT)
    • With this test, the hardening of thermoset constructions is determined.

 

  • Ultrasonic thickness measurements (NDT)
    • A US thickness measurement allows checks to be carried out on the wall thicknesses of homogenous materials, even when they are accessible from one side.

 

  • Eddy Current Thickness Measurements (NDT)
    • With this apparatus, wall thickness measurements can be carried out on heterogeneously composed surfaces (thermosetting and thermoplastics), provided that these are accessible from two sides.

 

  • Endoscopy (internal tank inspection/visual inspection) (NDT)
    • With the endoscope, tanks can be inspected internally without entering the tank (danger/no manhole).

 

  • Vacuum box test (NDT)
    • With this inspection, welded seams in flat bottoms and cylindrical tank bodies can be efficiently checked for tightness.

 

  • Tank evaluation – calculation of the service life of containers (NDT)
    • By means of a tank evaluation approved by the Flemish Region, we will carry out an examination to check the condition of the tank. This inspection makes it possible to estimate the quality and service life of metal containers buried directly in the ground and provides criteria for determining the maximum period of re-inspection.
  • Stage II – measurements
    • At filling stations equipped with stage II, the petrol vapour ratio can be tested with our own installation (approved by VITO).
Eddy current measurement