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. Repeat this procedure with additional wiping until residual surface penetrant has been removed. The dye penetrant method of inspection is a nondestructive test for defects open to the. Penetrant systems for carrying out dye penetrant inspection. Table of contents level i questions answers level ii questions answers. Faraday road, south dorcan industrial estate, swindon sn3. 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. Dye penetrant inspection dp, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method.
Particle testing at level 2, international atomic energy agency, 2000pdf, 2. This procedure shall be demonstrated prior to use in accordance with the requirements of t150, asme code sec. Dye penetrant inspection technique of turbine rotating. A dye penetrant inspection is a nondestructive inspection method where liquid penetrates in defects by capillary action which are accessible on the surface. The primary advantages and disadvantages when compared to other nde methods are summarized below. Penetrant testing, or pt, is a nondestructive testing method that builds on the principle of visual inspection. 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. Liquid penetrant a solution of dye with the ability to penetrate into fine openings. 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 blend of aromatic and aliphatic hydrocarbon solvents, refined mineral oils, dye, surface active agents, alcohols and hydrocarbon propellants. Precleaning the removal of surface contaminants from the test part so that. It may be used on such materials as aluminum, magnesium, brass, copper, cast iron, steel, stainless steel, carbides, stellite, certain plastics and ceramics.
For details of substances presenting a health hazard within the meaning of the chemicals hazard information and packing. 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. 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. Penetrant testing pt test objects are coated with visible or fluorescent dye solution.
The process is based upon capillary action, where low surface tension fluid penetrates into clean and dry surfacebreaking discontinuities. This module is intended to provide an introduction to the ndt method of penetrant testing. 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 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. Ndt fluorescent penetrants, dye penetrant inspection. Dye penetrant inspection procedure industrial inspection. Likewise, if the penetrant shows evidence of contamination from dirt, it is discarded. Jul 12, 2016 penetrant testing concept of developer, inspection and dye sensitivity. Dye penetrant examination is limited to temperature conditions normally 560 degree celsius. 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. Health and safety precautions in liquid penetrant inspection.
The penetrant materials and surface of part should be between 50 to 125f 10 and 38c visible method 7. The unit is equipped with two rotating fans, one at each end namely at the turbine side and the exciter side of the generator. Penetrant systems for carrying out dye penetrant inspection twi. A nondestructive testing ndt procedure suitable for general. Liquid penetrant testing a nondestructive test that uses liquid penetrant materials to penetrate and detect various types of discontinuities open to the surface. Dye penetrant indications caused by superficial surface. 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. 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.
This method is controlled by the type of penetrant used i. In particular, by pt we can nd the following kind of discontinuities. Water washable, solvent removable, post emulsifiable are the common choices. The method has high sensitivity to small surface discontinuities. Each one has been formulat ed to fulfill a specific function in the inspection process. Question and answer for liquid penetrant testing method. The procedure qualification record shall be attached to this procedure. 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. Although there are more options in the way the test is performed, the basic principles have not. Use the download button below or simple online reader. Liquid penetrant inspection is used to detect any surfaceconnected discontinuities such as cracks. Penetrant testing concept of developer, inspection and dye sensitivity. July 1, 2005 1999 edition standard practice for liquid penetrant examination feb.
It may be used on such materials as aluminum, magnesium. 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. 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. What links here related changes upload file special pages permanent link. E 1208 test method for fluorescent liquid penetrant. 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. Dye penetrant inspection technique of turbine rotating component.
When proper health and safety precautions are followed, liquid penetrant inspection operations can be completed without harm to inspection personnel. Cleaning of excess penetrant the excess penetrant is then removed from the surface. The penetrant may be applied to all nonferrous materials and ferrous materials, although for ferrous components magneticparticle inspection. The developer acts as a blotter, drawing trapped penetrant out of imperfections open to the surface.
Dye penetrant testing fluorescent penetrant inspection fpi. A lower sensitivity penetrant works well on rough surfaces, while a higher sensitivity penetrant is suitable for highly machined surfaces. Excess dye is then removed from the surface, and a developer is applied. Noted for its simple process, fpi is used widely in a variety of industries. Magnetic yoke is a handheld device that induces a magnetic field between two poles. Dye penetrant inspection dye penetrant inspection dpi, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and. Penetrant testing pt professionals mht access services. Liquid dye penetrant test inspection free ndt sample. Pdf procedure for dye penetrant testing prabir datta. Liquid penetrant testing classroom training book second.
The technique is based on the ability of a liquid to be. Ko19 along with ko17 penetrant and d350 developer comprise sherwin incs hitemp penetrant system, which works at temperatures above which ordinary penetrants are ineffective. For years, this has been far and away the most applied method for checking surface defects in metals and nonporous materials using liquid. Dp40 dye penetrant non destructive testing ndt equipment. Apply penetrant spray or brush the part or section to be inspected so that surface is covered with penetrant. Dp40 dye penetrant chemwatch independent material safety data sheet issue date. It typically comes in three aerosol cans cleaner, penetrant, and developer. Original procedure for liquid penetrant testing was created 8082016. Dye penetrant test procedure free download as pdf file. Question and answer for liquid penetrant testing method levels i, ii, and iii for download. 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. 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. This procedure contains water washable process with both visible and fluorescent systems.
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. Pdf non destructive test dye penetrant and ultrasonic on. The dye penetrant solvent removable method is most popular because it is low cost and very versatile. There are many types of dye used in penetrant inspections. Objective liquid penetrant processes are nondestructive testing methods for detecting discontinuities that are open to surface. Liquid penetrant testing classroom training book second edition. 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. However, there are a number of health and safety related issues that must be addressed. It is used in the penetrant process to remove excess ko17 hitemp penetrant from part surfaces or for cleaning an insoection surface prior to applying ko17 penetrant. Callington supply dye penetrants for dye testing, dye penetrant testing, liquid penetrant testing and dye penetrant crack detection. The dye penetrant method of inspection is a nondestructive test for defects open to the surface. The liquid penetrant inspection process consists of six steps, each involving a specific penetrant product.
Coverage for mechanical breakdowns begins after the manufacturers warranty expires. This article provides you with a example dye penetrant inspection procedure. Liquid dye penetrant inspection ndt sample test report format. For the visual testing vt of fluorescent indications, the uv radiation source must have an intensity of at least wcm2 at the test surface. Astme1417 standard practice for liquid penetrant testing. Liquid penetrant and magnetic particle testing at level 2. The file extension pdf and ranks to the documents category.
If penetrant pulls back in droplets stop and clean part again. Liquid dye penetrant inspection ndt sample test report. Although there are more options in the way the test is performed, the basic principles have not changed over the years. Fluorescent penetrant inspection fpi is a type of dye penetrant testing inspection in which a fluorescent dye is applied to the surface of a nonporous material in order to detect defects that may compromise the integrity or quality of the part in question. This method of inspection works on the principle of capillary action. 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. Like all nondestructive inspection methods, liquid penetrant inspection has both advantages and disadvantages. After welding, dye penetrant inspection was performed using the following procedure. Dye penetrant testing procedure dye penetrant inspection. Services nondestructive testing ndt liquid dye penetrant liquid penetrant inspection often abbreviated pt, fpi or lpi is a nondestructive inspection method that provides detection of flaws 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. Nondestructive testing liquid penetrant inspection means of verification abstract these tests are intended to ensure that the penetrant system works correctly and that there has been no harmful deterioration of the process materials during service. If the penetrant sensitivity level is not already established by a specification or procedure, evaluation on actual parts. Dye penetrant test procedure welding materials scribd. The dye penetrant method of inspection with spotcheck is a nondestructive test for defects open to the surface. Practical ndtpdt methods for bridge inspection center for.
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