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Standard for quality inspection of polyethylene anticorrosive tape

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Standard for quality inspection of polyethylene anticorrosive tape

Release date:2016-08-02 The author: Click on:

One, apparent:

Polyethylene anticorrosive tape is good or bad to determine the quality of winding, so the requirements should be smooth, lap uniform, no wrinkles, no bulge, not allowed to break the point. As long as the dressing tool appropriate, serious operation, the above defects can be avoided. But sometimes in the winding process will produce bubbles, this situation often occurs in the hot weather, when the sun is tight enough to tape. As the tape itself has a certain degree of flexibility and self-repair capacity, these bubbles can disappear on their own, such as the bubble is not a quality problem; if a permanent bubble, like wrinkles, should be eradicated repair.

Second, the thickness:

Polyethylene anticorrosive tape thickness index on the quality of corrosion has a great effect, especially the increase in the thickness of the adhesive layer can enhance the anti-corrosion ability. When the tape is determined and the structure is determined, the thickness thereof is determined. Therefore, the thickness and the total thickness of the tape can be determined in advance. However, to prevent the use of different batches of tape caused by insufficient thickness, inspectors can use the thickness gauge to determine the construction of the pipeline. It is also easy to determine the spark leak detection voltage.

Third, the cohesive force (peel strength)

Polyethylene anti-corrosion adhesive tape refers to the adhesion of the coating on the steel pipe, it is directly related to the quality of the coating, its size directly affects the water penetration capacity. So be sure to have sufficient cohesive force. Field test imitation DIN 30670 standard, that is, with a knife along the ring to open 10mm wide belt, and then use the spring scale and the pipe wall at 90 ° angle slowly opened, pull the speed should not be greater than 10mm / min, More than 8.0N / cm, this test should be wrapped around the tape 2h, anti-corrosion pipeline per kilometer should be tested 3. Each project, each batch of tape measured three sets of data. Anti - corrosion tape


Related tags:Anti-corrosiontape

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