Precision pipeline corrosion detection

　　1, The coating inspection and acceptance:

　　① surface coating during the construction and after construction, painting had to deal with the workpiece is protected against dust and other debris flying.

　　② treatment after coating, the coating should be consistent colors, sharp color bright, wrinkle-free skin, blistering, sagging, holidays and other defects.

　　③ measuring coating film thickness, film thickness was measured using contact-type film thickness, the film thickness is generally 3:00 thickness measurement, the mean value.

　　2, Quality Inspection

　　① quality testing using sample testing ways depending on design requirements.

　　② by visual inspection by the root. Cover layer surface should be uniform, smooth, no bubbles, wrinkles, protruding tumor and uneven hem overlay defects

　　③ film thickness was measured using magnetic thickness, measured at intervals of 1.5 m on a single precision light pipe at both ends and in the middle of the circumference of a little, the film thickness should meet two 85%: that 85% of the thickness of the measuring point design requirements, amounting to less than the thickness of the measuring points, the minimum should not be less than 85% of the design thickness;

　　④ with pinhole tester checks pinholes, if found pinholes, sanding with sandpaper grinding machine painted up;

　　⑤ insufficient film thickness or pinholes, after curing repair should be reviewed, the failure to repair again until qualified;

　　⑥ adhesion check, use a rigid tool draw an angle on the coating to cut 60 to conduct random checks, shall be classified through direct coating substrates, draw mouth taped portion, tear tape hindsight scratches, Tu layer should be no peeling. You may also have to be checked under the same conditions on the painting template.