Läcksökning med penetrant – kvalitetssäkring av

Sammanfattning: Vacuum box leak testing is, because of geometrical problems, not always possible andtherefore an alternate test method with dye penetrant is used. DEKRA Industrial has identifieda need for quality assurance of the method and development of a written procedure withguidelines that lead to more uniform ways of testing.A literature study was done to get a general overview of nondestructive testing (NDT) and tosee how the method is used in different applications. European and American standards werestudied. Analytical and numerical solutions, involving flow simulation, were deemed to berather difficult and beyond the scoop of this project. Thus the problems had to be solved byusing experimental methods. Interviews with personnel involved in leak testing were alsodone.The results of the interviews showed that how the method was applied varied very much anddevelopment of a procedure is therefore necessary. Standards that specifically deal with leaktesting with dye penetrant do not exists but parts of general NDT and PT standards have beendeemed as relevant. The results of the experiments showed that the method, although not asgood as leak testing with vacuum boxes, is reliable within its limitations. The limitations aremainly coupled to geometrical and weather conditions. No adequate penetration times couldbe determined.