The penetrant may be applied to all nonferrous materials and ferrous materials, although for ferrous components magneticparticle inspection. The process is based upon capillary action, where low surface tension fluid penetrates into clean and dry surfacebreaking discontinuities. Penetrant testing pt test objects are coated with visible or fluorescent dye solution. Penetrant testing concept of developer, inspection and dye sensitivity. Question and answer for liquid penetrant testing method. Mar 02, 2018 dye penetrant inspection dye penetrant inspection dpi, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method used to locate. July 1, 2005 1999 edition standard practice for liquid penetrant examination feb. Coverage for mechanical breakdowns begins after the manufacturers warranty expires. Liquid dye penetrant inspection ndt sample test report format there is document liquid dye penetrant inspection ndt sample test report format available here for reading and downloading. Penetrant testing pt professionals mht access services. In particular, by pt we can nd the following kind of discontinuities. There are many types of dye used in penetrant inspections.
Excess dye is then removed from the surface, and a developer is applied. The procedure qualification record shall be attached to this procedure. Penetrant systems for carrying out dye penetrant inspection. If penetrant pulls back in droplets stop and clean part again. Dye penetrant indications caused by superficial surface. Dye penetrant inspection technique of turbine rotating. A lower sensitivity penetrant works well on rough surfaces, while a higher sensitivity penetrant is suitable for highly machined surfaces. The technique is based on the ability of a liquid to be. 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. They may be effectively used in the inspection of both ferrous and nonferrous metals and on nonporous, nonmetallic materials, such as ceramics, plastics and glass.
Ko19 along with ko17 penetrant and d350 developer comprise sherwin incs hitemp penetrant system, which works at temperatures above which ordinary penetrants are ineffective. Liquid penetrant testing liquid penetrant inspection of nondestructive testing is a process for nding discontinuities open to the surface in solids and nonporous materials 3. What links here related changes upload file special pages permanent link. Like all nondestructive inspection methods, liquid penetrant inspection has both advantages and disadvantages. Make sure this fits by entering your model number the dye penetrant crack finder kit for cast iron and aluminum is a simple 4 step process that eas see more product details. Liquid penetrant testing both the visible and fluorescent dye penetrants can be applied when working with fluorescent penetrants, indications must to the test sample by spraying, brushing or immersing the part be viewed under darkened conditions with a highintensity uv in a penetrant bath. Cleaning of excess penetrant the excess penetrant is then removed from the surface. Dye penetrant inspection is a widely applied and lowcost inspection method used to locate surfacebreaking defects in nonporous materials such as metals, plastics, or ceramics. Dye penetrant examination is limited to temperature conditions normally 560 degree celsius. Use the download button below or simple online reader. The unit is equipped with two rotating fans, one at each end namely at the turbine side and the exciter side of the generator.
Pdf non destructive test dye penetrant and ultrasonic on. Dec 20, 2015 liquid dye penetrant inspection ndt sample test report format there is document liquid dye penetrant inspection ndt sample test report format available here for reading and downloading. A dye penetrant inspection is a nondestructive inspection method where liquid penetrates in defects by capillary action which are accessible on the surface. It may be used on such materials as aluminum, magnesium, brass, copper, cast iron, steel, stainless steel, carbides, stellite, certain plastics and ceramics. Precleaning the removal of surface contaminants from the test part so that. This procedure shall be demonstrated prior to use in accordance with the requirements of t150, asme code sec. The penetrant system used shall be type i fluorescent dye with high or ultra high sensitivity levels unless otherwise specified on the component drawing or purchase order.
The dye penetrant solvent removable method is most popular because it is low cost and very versatile. Likewise, if the penetrant shows evidence of contamination from dirt, it is discarded. A nondestructive testing ndt procedure suitable for general. When proper health and safety precautions are followed, liquid penetrant inspection operations can be completed without harm to inspection personnel. Dye penetrant inspection procedure industrial inspection.
For years, this has been far and away the most applied method for checking surface defects in metals and nonporous materials using liquid. Dye penetrant inspection technique of turbine rotating component. The technique is based on the ability of a liquid to be drawn into a clean in other words, unobstructed surface breaking flaw by capillary action. It may be used on such materials as aluminum, magnesium. Health and safety precautions in liquid penetrant inspection. Repeat this procedure with additional wiping until residual surface penetrant has been removed. Water washable, solvent removable, post emulsifiable are the common choices. This method is controlled by the type of penetrant used i.
This procedure contains water washable process with both visible and fluorescent systems. A blend of aromatic and aliphatic hydrocarbon solvents, refined mineral oils, dye, surface active agents, alcohols and hydrocarbon propellants. The developer acts as a blotter, drawing trapped penetrant out of imperfections open to the surface. Nov 01, 2010 liquid penetrant inspection lpi, also known as dye penetrant inspection dpi or penetrant testing pt, was first developed in the early 1940s to detect flaws on the surface of materials. Dp40 dye penetrant chemwatch independent material safety data sheet issue date. Table of contents level i questions answers level ii questions answers. Liquid penetrant testing method booklet contains suggested questions and answers in the liquid penetrant testing method for use in conjunction with recommended personnel qualification and certification in nondestructive testing. Dye penetrant testing fluorescent penetrant inspection fpi. Although there are more options in the way the test is performed, the basic principles have not. Callington supply dye penetrants for dye testing, dye penetrant testing, liquid penetrant testing and dye penetrant crack detection. This module is intended to provide an introduction to the ndt method of penetrant testing. Dye penetrant test procedure welding materials scribd.
Liquid dye penetrant inspection ndt sample test report format. The different types of penetrant, remover and developer are all interchangeable, except for dry powder, which must not be used with the colour contrast penetrant. The method has high sensitivity to small surface discontinuities. The penetrant materials and surface of part should be between 50 to 125f 10 and 38c visible method 7. Penetrant testing, or pt, is a nondestructive testing method that builds on the principle of visual inspection. The primary advantages and disadvantages when compared to other nde methods are summarized below. Penetrant systems for carrying out dye penetrant inspection twi. For details of substances presenting a health hazard within the meaning of the chemicals hazard information and packing. Liquid penetrant and magnetic particle testing at level 2. Dye penetrant inspection dp, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method. The dye penetrant method of inspection is a nondestructive test for defects open to the.
Liquid dye penetrant inspection ndt sample test report. Liquid penetrant testing classroom training book second. Dp40 dye penetrant non destructive testing ndt equipment. The liquid penetrant inspection process consists of six steps, each involving a specific penetrant product. Liquid penetrant inspection is used to detect any surfaceconnected discontinuities such as cracks. Liquid penetrant testing a nondestructive test that uses liquid penetrant materials to penetrate and detect various types of discontinuities open to the surface. This article provides you with a example dye penetrant inspection procedure. You can, therefore, use a fluorescent penetrant with a solvent, waterwashable or postemulsifiable remover in conjunction with either a dry powder, aqueous or nonaqueous developer. Pdf procedure for dye penetrant testing prabir datta. Jul 12, 2016 penetrant testing concept of developer, inspection and dye sensitivity. Each one has been formulat ed to fulfill a specific function in the inspection process. Microsoft word liquidpenetrantqualitycontrolandinspectionreportform author.
Although there are more options in the way the test is performed, the basic principles have not changed over the years. Question and answer for liquid penetrant testing method levels i, ii, and iii for download. Noted for its simple process, fpi is used widely in a variety of industries. Particle testing at level 2, international atomic energy agency, 2000pdf, 2. Faraday road, south dorcan industrial estate, swindon sn3. Magnetic yoke is a handheld device that induces a magnetic field between two poles. This method of inspection works on the principle of capillary action. Liquid penetrant inspection lpi, also known as dye penetrant inspection dpi or penetrant testing pt, was first developed in the early 1940s to detect flaws on the surface of materials. The dye penetrant method of inspection is a nondestructive test for defects open to the surface. Dye penetrant inspection dpi, also called liquid penetrant inspection lpi or penetrant testing pt, is one of the oldest and simplists ndt methods where its earliest versions using kerosene and oil mixture dates back to the 19th century. Ndt fluorescent penetrants, dye penetrant inspection.
If the penetrant sensitivity level is not already established by a specification or procedure, evaluation on actual parts. Liquid penetrant a solution of dye with the ability to penetrate into fine openings. Dye penetrant testing procedure dye penetrant inspection. Microsoft word liquid penetrant qualitycontrolandinspectionreportform author. Liquid penetrant testing classroom training book second edition. Apply penetrant spray or brush the part or section to be inspected so that surface is covered with penetrant. Outside this range dpe is not applicable because at high temperature the used penetrant becomes dry while at low temperature the penetrant liquid becomes highly viscous, thus impeding the penetration phenomenon and reducing the efficiency of testing. The file extension pdf and ranks to the documents category.
The dye penetrant method of inspection with spotcheck is a nondestructive test for defects open to the surface. Dye penetrant inspection dp, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method used to check surfacebreaking defects in all nonporous materials metals, plastics, or ceramics. Practical ndtpdt methods for bridge inspection center for. It typically comes in three aerosol cans cleaner, penetrant, and developer. If the penetrant sensitivity level is not already established by a specification or procedure, evaluation on actual parts with a few penetrants is strongly recommended. Objective liquid penetrant processes are nondestructive testing methods for detecting discontinuities that are open to surface. E 1208 test method for fluorescent liquid penetrant. The method used to analyze the welded with non destructive test dye penetrant pt method to see indication on the surface of the object and. Dye penetrant test procedure free download as pdf file.
1198 856 81 198 1206 453 430 532 709 238 211 158 668 966 255 498 493 1019 1280 113 231 1292 1020 319 177 479 1136 1201 673 907 80 1501 535 1441 1029 288 645 852 942 1093 812 412 312 1308