Dye penetration method

Liquid penetrant testing of seamless and welded steel tubes for the detection of surface imperfections. After a penetration time of approximately 10 minutes the time depends on the material type and defect size to be detected the surface is carefully cleaned again. The intensity shall be checked at least once every 8 hours, or whenever the work station is changed. Water-washable penetrants can be washed out of discontinuities if the rinsing step is too long or too vigorous. A Useful System or Undecipherable Hieroglyphics? Excessive heat may cause aerosol cans to explode.

Penetrants are then classified by the method used to remove the excess penetrant from the part. The material is presented in a manner that promotes understanding and the ability to make immediate application. Penetrant is applied to the surface. The developer acts as a blotter and draws the penetrant from the flaw to reveal its presence. Non-destructive testing, penetrant testing EN , Non-destructive testing of steel forgings — Part 2: Penetrant manufactures have developed different formulations to address a variety of inspection applications. Views Read Edit View history.

A dye penetrant solution is applied locally to the seal edge to be tested for leaks. These provide the user flexibility of three proven and standardized methods to choose from when performing package seal integrity testing. Liquid penetrant inspection is a nondestructive testing method that reveals surface breaking flaws by bleedout of a penetrating liquid colored with a visible or fluorescent dye from the flaw. In other projects Wikimedia Commons. The structural steel, automotive, petrochemical, power generation, and aerospace industries are a few examples that utilize liquid penetrant inspection.