How to deal with the problem that the coating of 3PE anticorrosive steel pipe is too thin
If the anti-corrosion layer of 3PE anti-corrosion steel pipe is too thin, it may be rejected on site. In this case, it can only be reprocessed.
In the 3PE steel pipe anticorrosive layer, if the powder adheres to the surface of the steel pipe, quality problems such as powder and adhesive, adhesive and polyethylene will damage the integrity of the 3PE steel anticorrosive layer. Such anticorrosive steel pipes should be rejected. When the thickness of the polyethylene layer exceeds the specification minimum, whether the thickness reduction point meets the requirements of the specification. Repair of repairable defects shall be allowed with patches or shrink sleeves. Otherwise, if possible, take measures to degrade the anticorrosive layer. Bubble defects, polyethylene cracks, and mechanical damage defects within the allowable range of the specification can be repaired with patches or shrink sleeves. Repairs are limited to repairing minor defects individually.
The warping of the edges of the 3PE anti-corrosion steel pipe coating is a serious quality problem, which seriously affects the image of the product and causes the anti-corrosion layer to be scrapped. Some warped edges can be detected at the exit pile, some are only visible at the pipeline site, and some are only visible at the pipeline construction site. Once a problem occurs, it is not only extremely difficult to repair, but it is also difficult to prevent, as some problems require a long latency period before exposure. Therefore, the problem of edge warping must be prevented and solved during the production process.
It can be seen that the quality control of the anti-corrosion layer of 3PE anti-corrosion steel pipe is quite complicated. Some quality problems may escape the quality inspection of the outlet pipe string, and may even eventually put the installation site of the mobile pipeline into operation. Therefore, it is necessary to strictly inspect and control the quality of each post from surface treatment, painting to pipeline construction. Only by strictly completing each process in accordance with the requirements of the specification can the quality of each process and the final product quality of the anticorrosive pipe be guaranteed. Among them, the preheating process and painting posts should be included in the quality inspection system, especially the quality inspection and control of painting operations should be the top priority.
In the 3PE steel pipe anticorrosive layer, if the powder adheres to the surface of the steel pipe, quality problems such as powder and adhesive, adhesive and polyethylene will damage the integrity of the 3PE steel anticorrosive layer. Such anticorrosive steel pipes should be rejected. When the thickness of the polyethylene layer exceeds the specification minimum, whether the thickness reduction point meets the requirements of the specification. Repair of repairable defects shall be allowed with patches or shrink sleeves. Otherwise, if possible, take measures to degrade the anticorrosive layer. Bubble defects, polyethylene cracks, and mechanical damage defects within the allowable range of the specification can be repaired with patches or shrink sleeves. Repairs are limited to repairing minor defects individually.
The warping of the edges of the 3PE anti-corrosion steel pipe coating is a serious quality problem, which seriously affects the image of the product and causes the anti-corrosion layer to be scrapped. Some warped edges can be detected at the exit pile, some are only visible at the pipeline site, and some are only visible at the pipeline construction site. Once a problem occurs, it is not only extremely difficult to repair, but it is also difficult to prevent, as some problems require a long latency period before exposure. Therefore, the problem of edge warping must be prevented and solved during the production process.
It can be seen that the quality control of the anti-corrosion layer of 3PE anti-corrosion steel pipe is quite complicated. Some quality problems may escape the quality inspection of the outlet pipe string, and may even eventually put the installation site of the mobile pipeline into operation. Therefore, it is necessary to strictly inspect and control the quality of each post from surface treatment, painting to pipeline construction. Only by strictly completing each process in accordance with the requirements of the specification can the quality of each process and the final product quality of the anticorrosive pipe be guaranteed. Among them, the preheating process and painting posts should be included in the quality inspection system, especially the quality inspection and control of painting operations should be the top priority.
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