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What are the three media that cause corrosion of steel skeleton polyethylene pipe?

Release date:2018-07-19 Author: Click:

What are the three media that cause corrosion of steel skeleton polyethylene pipe?

Pipeline corrosion prevention has always been the focus of our attention. PE steel skeleton composite pipe maintenance, because pipeline corrosion caused fundamental damage to the pipeline, not only seriously affected the normal working efficiency of the pipeline, but also fundamentally shortened the service life of the pipeline, greatly increased economic costs, resulting in unnecessary Economic losses. We have been looking for and analyzing the causes of pipeline corrosion in various cases in the past. Today we will tell you specifically what are the three media causing corrosion of steel skeleton polyethylene composite pipe.

 Maintenance of PE steel skeleton composite pipe

  

1. Naphthenic acid


Naphthenic acid is an organic substance in crude oil. When the temperature exceeds 220 C, it begins to corrode and reaches its maximum at 270 280 C. When the temperature exceeds 400 C, the naphthenic acid in crude oil has been vaporized. 316L (00Cr17Ni14Mo2) stainless steel data is useful information for naphthenic acid corrosion resistance and is often used in high temperature naphthenic acid corrosion environment.


Two, chloride


Chloride corrosion of carbon steel is basically uniform corrosion, and with the occurrence of hydrogen embrittlement, corrosion of stainless steel is pitting corrosion or intergranular corrosion.


Three, sulfide


There are more than 250 kinds of sulfides in crude oil, such as hydrogen sulfide (H2S), mercaptan (R-SH), sulfide (R-S-R), etc. The content of H2S in liquefied petroleum gas (LPG) in China is high, forming cracks in containers. Some of them break through cracks after 87 days of production. After magnetic particle testing, there are 417 cracks on the inner surface and no cracks on the outer surface of the sphere. Stress corrosion caused by high 2S content should be paid attention to.

The corrosion of steel skeleton polyethylene composite pipe can not be separated from the above three aspects from the medium point of view. Of course, the cause of corrosion of the pipe is not only these factors, but also related to the construction technology of the pipe, as well as the construction environment, including the quality of the pipe itself. In the introduction, we will continue to give you specific instructions.


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Key words:Whoisgoodatsteelskeletonpolyethylenecompositepipe?,Connectionmethodofsteelskeletonpolyethylenecompositepipe,MaintenanceofPEsteelskeletoncompositepipe

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Liaoning Zhong Ji Technology Co., Ltd.

Contact: Manager Wang

Tel: 18004275506

Eighteen billion four million two hundred and seventy-five thousand five hundred and nine

Tel: 0427-6515296

Fax: 0427-6515299

Mailbox: Wang35055@163.com

Zip code: 124200

Address: Dawa Lingang Economic Zone, Panjin, Liaoning

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