The surface must be free of oil, grease, water, or other contaminants. 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. Fluorescent penetrant inspection fpi is a type of dye penetrant inspection in which a. Both fluorescent and visible penetrants are approved for use in four different penetrant inspection methods. Process specification for liquid penetrant inspection. Fluorescent penetrant inspection fpi is one of the. When performing a liquid penetrant test, the surface of the part under inspection should be. Heres a quick overview of the two kinds of liquid penetrant inspections pt. It is a nondestructive testing method for detecting discontinuities that are open to the surface such as cracks, seams, laps, cold shuts, laminations, isolated porosity, through leaks, or lack of porosity and is applicable to inprocess, final, and maintenance examination. The penetrant method of nondestructive testing is based on. Fluorescent penetrant inspection fpi is the most widely used inspection method. Standard practice for fluorescent liquid penetrant testing. Recognize common interpretation and code requirements of this method.
It is also recommended that inspection personnel should wear longsleeved clothing to minimize exposure. The ingredients are usually supplied in aerosol cans or sprays. Documentation in the form of a signed letter or certificate of completion that. Our systems are designed to process waterwashable fluorescent penetrant or post emulsifiable fluorescent penetrant. Every specification states that the part or inspection surface must be clean and dry. Type ii, visible penetrants, have no sensitivity classifications. Product data sheet fbp9 fluorescent penetrant metlchek penetrant professor approved 1 112015 2015. This inspection process is robust and harmless for the part being tested. The ultimate guide to fluorescent penetrant testing infographic. This must take place in a dark room to ensure good contrast between the glow emitted by the penetrant in the defected areas and the unlit surface of the material.
Differences between sensitivity ams 2644 penetrant sensitivity levels sensitivity levels are a classification system for fluorescent liquid penetrants which is outlined in ams 2644 inspection material, penetrant specification. Code of practice for liquid penetrant flaw detection. Introduction the endoscopic fluorescent penetrant inspection fpi is a technique arising from two different ndt methods. Accent industrial standard fluorescent penetrant systems. Review of literature on probability of detection for liquid. The penetrant materials and surface of the part shall be between 50 to 125f 10 and 38c fluorescent method 7. Liquid penetrant inspection regardless of which type of penetrant is used, the steps are similar.
Fluorescent penetrant inspection fpi is the most widely used global inspection method, with over 90% of aviation components being inspected with fpi at some point during their engineering life. Us3114039a selfdeveloping penetrant method of flaw. Accent industrial also specializes in providing water treatment systems specifically designed for fluorescent penetrant inspection systems. General guide to pre and post penetrant inspection cleaning. Manual transfer of the fluorescent print under ultraviolet light to a transparent plastic. Penetrant lines for fluorescent penetrant inspection fpi test stands and plant construction for the dye penetration process ndt systems for penetrant testing also known as pt penetrant testing are most frequently used in the field of nondestructive material testing to carry out the crack detection process. Fatigue surface crack detection by using fluorescent dye. For rotating parts, the most frequentlyapplied inspection technique is fluorescent penetrant inspection fpi. Fbp911 is a special oil and solvent free formulation which utilizes biodegradable components, and is voc free. Nov 25, 2020 penetrant inspection is a popular detection method because it is relatively inexpensive, can be done remotely, and can be administered on a surface that is oriented in nearly any direction. Nevertheless, the only basic difference between visible dye and fluorescent penetrant inspection is the method of viewing the results or indications. Fbp9is a special oil and solvent free formulation which utilizes biodegradable components, and is voc free. There are six main steps in a fluorescent penetrant inspection process.
Kfzmgeqaynkofkuhfffaoysan isopropanol chemical compound us53035a selfdeveloping penetrant method of flaw detection and penetrant therefor us3114039a en. Non destructive testing dye penetrant inspection wermac. Fpi requires the cleaning and drying of surfaces to be inspected, followed by application of the penetrant, removal of the excess. For aluminum and titanium, the minimum metal to be removed is 0. Liquid penetrant and magnetic particle testing at level 2. There are some applications of eddy current and ultrasonic inspection, but fpi remains the fundamental technique because it can detect cracks that have reached the surface of the specimen. Liquid penetrant processes are nondestructive testing methods for detecting. The metal surface must be free of all contaminants that could prevent penetrant from seeping into defects. Fluorescent penetrant inspection ams2645 sae international. Liquid penetrant inspection lpi is used to ensure that each casting produced is free from manufacturing defects that might be too small to see with normal visual inspection.
Safety requires good lighting and good housekeeping in work areas. It is low in sulfur and halogens and is safe for use on all metal surfaces. Product data sheet fbp911 fluorescent penetrant metlchek penetrant professor approved 1 112015 2015. Maintaining good vision and appropriate liquid penetrant testing. This involves saturating a clean, lintfree cloth with acetone and wiping. Whether the penetrant is brushed or sprayed onor the.
Fluorescent penetrant inspection definition viewtech borescopes. If there is a crack, the penetrant will seep inside and after being washed and dried the material is inspected under highintensity uv lighting for evaluation of any flaws. Understand the basic principles of penetrant examination. The requirements of this specification are embodied in the latest issue of astm e 1417. Dye penetrant inspection, also known as liquid penetrant inspection, is synonymous with fluorescent penetrant inspection fpi. Because free electrons absorb and then radiate back most of the light energy that falls on them. Rest of the procedure is same as outlined for dye penetrants. Fpi uses a dye penetrant that will fluoresce under uva 365 nm black light. Wld 204 non destructive testing i penetrant testing. It can be used on metals and other nonporous materials not harmed by penetrant materials. Daily weekly monthly every 500 parts run through it 8. Typically, the cleaner is applied to a lint free cloth that is used to carefully. Liquid penetrant testing is one of the oldest and simplest ndt methods where its earliest versions.
Penetrant inspection may take the form of fluorescent penetrant inspection fpi or visible liquid penetrant inspection lpi. The penetrant comes in two types of liquids visible dye colored red and fluorescent dye. Liquid penetrant inspection is a technique which can be used to detect defects in. Fluorescent penetrant inspection fpi is a non destructive testing ndt technique where a fluorescent dye is applied to the surface of an impermeable material to clearly identify surface defects. Fluorescent penetrant inspection ams2645 this specification has been declared superseded by the aerospace materials division, sae, as of february 1995. Colored contrast penetrant require good white light while fluorescent penetrant need to be used in darkened conditions with an ultraviolet black light 3. Sep, 2018 fluorescent penetrant inspection loses effectiveness when there is improper cleaning of red dye from a previous inspection. Faa issues saib on propeller maintenance cessna owner. Expired fee related application number us06673,587 inventor. Download brochure pdf, 88 7 kb download post removable zyglo penetrants info pdf, 166 kb download water washable zyglo penetrants info pdf, 174 kb fluorescent penetrant testing is the most versatile ndt process for the detection of defects open to the surface in noporous materials. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Deformation was big enough to obstruct the free movement of. A variety of penetrant materials are available and selection is often based on the required sensitivity level of the test, equipment available at the test site to conduct the test and other factors. The castings are dipped in penetrant with a very high capillary action and allowed to set long enough for the penetrant to be pulled into any defects connected to the.
Uva induced fade in fluorescent penetrant tests the asnt ndt. How to do fluorescent penetrant testing magnaflux eu en. Process specification for pickling, etching, and descaling of. American society for nondestructive testing international service center po box 28518 1711 arlingate lane columbus, oh 432280518 usa 800 2222768 or 614 2746003. Surfaces should be free of foreign materials and paint that would prevent penetration of defects or hold unwanted penetrant. Engineering studies for fluorescent penetrant inspection with. Penetrant lines for fluorescent inspection secuchek gmbh. Visible dye material residue can be extremely difficult to remove and can fill voids, flaws, and cracks, which can affect subsequent inspections. Liquid penetrant inspection is used to detect any surfaceconnected. 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. These points of exit and reentry form opposite magnetic poles. One approach relies on a fluorescent penetrant, which shows surface irregulari.
Penetrant inspection is an inexpensive and reliable nondestructive inspection method for detecting discontinuities open to the surface of the item to be inspected. Penetrant testing, often called pt or liquid penetrant, was originally called. Removal of excess penetrant developing inspection liquid penetrant testing is one of the oldest and simplest ndt methods where its earliest versions using kerosene and oil mixture this method is used to reveal surface discontinuities by bleed out of a colored or fluorescent dye from the flaw. For standard liquid penetrant inspection, sensitivity level 3 or 4 fluorescent penetrant shall be used. Fluorescent penetrant inspection in doing so, the material is submerged in a fluorescent penetrant. Using fluorescent type of penetrant, it is helpful to use portable black light source, while rinsing, so as to ensure that rinsing operation is complete. Type i, fluorescent penetrants, are available in five sensitivi ties ranging from ultralow, level 1. Jan 28, 2020 how to do fluorescent liquid penetrant testing video watch a demonstration of the penetrant inspection method according to astm e1417, including basic steps for ndt with an ams 2644 type 1 penetrant. Fluorescent penetrant inspectionfpi advanced deburring. One of the most critical steps of a liquid penetrant inspection is the surface preparation. How to do fluorescent liquid penetrant testing video watch a demonstration of the penetrant inspection method according to astm e1417, including basic steps for ndt with an ams 2644 type 1 penetrant. Before the penetrant can be applied to the surface of the material in question one must ensure that the surface is free of any contamination such as paint, oil, dirt, or scale that may fill a defect or falsely indicate a flaw. Penetrant process methods for cleaning a surface to be penetrant inspected cleaning1604 mechanical chemical solvent general guide to pre and post penetrant inspection cleaning cleaning is an integral part of the penetrant inspection process. Student manual penetrant examination usnrc technical training center rev 04096.
789 1001 1356 684 1355 1037 998 811 19 1511 1478 1294 263 170 1334 1490 126 1533 1527 11 636 1454