T9074-AS-GIB-010/271 Rev 1
5.4.1 Procedure. The liquid penetrant inspection procedures shall contain, as a minimum, the following information: a. Brand name and manufacturer's identifying designation of all materials used within each penetrant family. Each penetrant family shall be grouped together and include: penetrant type, removal method, sensitivity level (if applicable), and development form. Intermixing from different families or different manufactures is not permittted. b. Details of method of precleaning and drying, including brand name (brand names for acetone, alcohol, or other bulk cleaners are not required) and type of cleaning materials used, drying temperature requirements, and time allowed for drying. c. Details of method of penetrant application, the length of time that the penetrant remains on the surface, and the temperature of the surface and penetrant during penetration. d. Details of method of removing excess penetrant from the surface, and of drying the surface before applying the developer (where applicable). e. Details of the method of applying the developer and the length of developing time before inspection. f. Method of post-test cleaning. g. The applicable acceptance standards. 5.4.1.1 Change of Penetrant Materials. When the brand or type of precleaner, penetrant, penetrant remover (solvent), or developer differs from that specified in the procedure, the procedure shall be revised to include the alternate penetrant materials and shall be requalified. 5.4.1.2 Record Requirements. Records (see 1.8) of liquid penetrant inspections shall contain the following: a. Description and unique identification of item inspected. b. Approved procedure identification. c. Penetrant manufacturer (brand) and type identification. d. Acceptance standard used. e. Date of inspection. f. Signature(s) of inspector(s). g. Disposition (accept/reject) of the item inspected. 5.5 SURFACE PREPARATION. Surfaces to be inspected shall be free from scale, slag and adhering or imbedded sand, or other extraneous materials. With the exception of undercut that is within specification allowances, the contour of welds shall blend smoothly and gradually into the base metal. Weld surface irregularities shall be removed to the extent that they will not interfere with interpretation of the test results. The final liquid penetrant inspection shall be performed in the final surface condition as specified in 1.4 herein. Mechanical or abrasive operations may be performed on surfaces to be liquid penetrant inspected, provided the final surface condition does not exhibit visible smearing or similar deformation. Tumbling, peening, power wire brushing, or shot, sand, grit, or vapor blasting shall not be performed on surfaces to be liquid penetrant inspected unless some other surface preparation that does not result in smearing or similar deformation of the treated surface is performed before inspection, or if specifically approved by the authorized representative of NAVSEA. 5.5.1 Finished Surfaces. Surfaces for which a specific finish is required shall be given such surface finish prior to the final liquid penetrant inspection prescribed by the applicable specifications. Inspection at intermediate stages of fabrication shall be as specified in the applicable specification.
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