Dye penetrant testing procedure

Liquid dye penetrant test inspection free ndt sample. Dye penetrant inspection basic principle practical procedure pros and cons responsible for this video. Rest of the procedure is same as outlined for dye penetrants. The dye penetrant solvent removable method is most popular because it is low cost. Dye penetrant inspection, also called liquid penetrate inspection or penetrant testing, is a widely applied and lowcost inspection method used to check surfacebreaking defects in all nonporous materials.

Dye penetrant inspection procedure industrial inspection. Dye penetrant test dpt, lpi, pt non destructive test. Here is the step by step dye penetrant testing process. Step by step dye penetrant testing visible technique with solvent removable process. One of the most critical steps of a liquid penetrant inspection is the surface preparation. Objective this procedure provides the method and acceptance requirements for visible dye liquid penetrant examination removable solvent type ii, method c of carbon steel, stainless steel, low alloy steel and weldments of these materials. Basic processing steps of a liquid penetrant inspection. This is a simple lowcost method of detecting surfacebreaking flaws such as cracks, laps, porosity, etc. The surface must be free of oil, grease, water, or other contaminants that may prevent penetrant from entering flaws. Liquid penetrant processes are non destructive testing methods for detecting discontinuities that are open to surface. Dye penetrant inspection dpi, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method used to.

The technique is based on the ability of a liquid to be. Lpi is used to detect casting, forging and welding surface defects such as hairline crac. Liquid penetrant examination national board of boiler. Non destructive testing dye penetrant inspection wermac. This is a sample lpt procedure and may be required to be modified as per specific requirements. Dye penetrant testing procedure dye penetrant inspection. In the standard testing temperature range of 1560c, and using post emulsifiedsolvent. Dye penetrant inspection dp, also called liquid penetrate inspection lpi or penetrant testing pt, is a widely applied and lowcost inspection method used to. Liquid penetrant examination is one of the most popular nondestructive. The ultimate guide to visible dye penetrant testing. 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. This procedure contains water washable process with both visible and fluorescent.

The 3 spray cans aerosol are provided for this test. The ultimate guide to visible dye penetrant testing infographic. Coat the part or section to be inspected with cleanerremover. It may be used on such materials as aluminum, magnesium, brass, copper, cast. Leave the penetrant, as it is, on the surface for a minimum. Pdf procedure for dye penetrant testing prabir datta. Scope of application this procedure is in according with asme bpv code sec. The penetrant may be applied to all nonferrous materials and ferrous materials, although for ferrous components magneticparticle inspection is often used instead for its subsurface detection capability. This is the most delicate part of the inspection procedure because the. The sample may also require etching if mechanical operations such as machining, sanding.