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Causes of air bubbles around anticorrosive tape

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Causes of air bubbles around anticorrosive tape

Release date:2017-10-29 Author: Click:

Based on the feedback from the owners, supervisors, design units and construction units of large-scale pipeline petrochemical projects, the general reasons for air bubbles in the winding process of tape are as follows:

    1. The temperature difference between the pipe body and the adhesive tape.

一分彩    2. The temperature changes in the atmosphere. The larger the pipe diameter, the greater the effect of the anticorrosive layer.

    3. In the weather of incomplete rust removal or large wind and sand, there are foreign objects on the pipe surface.

4. As the steel pipe absorbs heat, and the black of the anticorrosive tape is more heat-absorbing, it is forbidden to expose the pipe after corrosion, and it should be stored according to requirements. And because the sealing of the tape is better, the anti-corrosion layer cannot be penetrated for a long time, and air bubbles are generated.

In the SY / T 0414-2007 standard, it is clearly stated:

一分彩    When the weather is hot or sunny, bubbles are often generated when the adhesive tape is wound. Due to the elasticity of the adhesive tape itself and its ability to repair itself, these bubbles can disappear by themselves, so this situation may not be a quality problem. If air bubbles are generated, like wrinkles, they should be repaired.

一分彩After all, the generation of air bubbles is the thermal expansion and contraction of the polyethylene-based film, not a construction quality problem. The general solution is to take corresponding measures after the external corrosion protection of the steel pipe is completed to avoid direct sunlight on the surface of the steel pipe, such as covering the anti-corrosion steel pipe with grass or grid cloth. This can prevent the tape from aging and reduce the generation of air bubbles.

一分彩Under the condition of low temperature, such as rainy days and buried pipes, the air bubbles that have already generated bubbles will be eliminated by themselves, so it is not appropriate to locate quality problems.


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Suzhou Qiangjiang Pipeline Anticorrosive Material Co., Ltd.

Contact: Cheng Huiqiang

Contact : Li Cong
Telephone:0512-63982510 Mobile phone:13962536717

Mobile phone:13806256210

Fax:0512-63982520
Address: No. 333, Jinxian Road, Jinjiaba, Wujiang District, Suzhou, Jiangsu
Website:www.diendanthanhly.net

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