Acid cleaning and passivation of butadiene pipelines
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Hello everyone: I am working on a project involving the transportation of butadiene, and the transport pipelines are made of carbon steel. The client requires that these pipes be acid-washed and passivated. I’m not quite sure whether carbon steel pipes really need to be acid-washed and passivated; if so, how should this process be carried out? I would be extremely grateful if the master who is aware of this could give some guidance!
There is some information available online regarding the pickling and passivation of carbon steel; it’s best to consult a professional manufacturer.
To form a passivation film, the pipes on ships that transport fuel oil and lubricants are all made of carbon steel; how can passivation be achieved without acid cleaning?
It is standard practice to carry out acid washing and passivation on carbon steel pipes; this is not a difficult process, and there are many professional teams available to do it. The specific procedure involves first rinsing the pipes, then cleaning them with acids such as oxalic acid, followed by the addition of a passivating solution. For higher quality results, alkali cleaning is performed first, and after passivation, the pipes are drained and cleaned thoroughly
This post was last edited by Sammy_Wang on 2015-11-6 at 14:23. The meaning and purpose of cleaning: The pipes and equipment used in this project inevitably accumulate dirt such as rust, oil, sediment, and various oxides during manufacturing, transportation, storage, and installation. If this dirt is not removed, it can cause side reactions during production and affect the quality of the products. Therefore, before starting up the equipment, the system and pipelines must be thoroughly cleaned chemically to remove various impurities, ensuring that the inner surfaces of the equipment and pipes achieve the required level of cleanliness, thus creating favorable conditions for producing high-quality products as soon as possible. The system and pipes need to be cleaned before driving.
Carbon steel is pickled; carbon steel is sensitive to acids. To protect carbon steel, an anti-corrosion coating is applied, while only stainless steel pipes are pickled and passivated.
Carbon steel pipes are also pickled, for use in ships
That’s right; for example, the chemical cleaning commonly used in steam pipelines involves alkali cleaning – acid cleaning – neutralization – passivation. One should not understand the entire process in a simplistic or one-sided manner
Can polymeric-grade butadiene be transported over long distances? If long-distance transportation is possible, are there any special conditions or requirements?
What is the difference between polymer-grade butadiene and ordinary butadiene? How long is this long distance? You can post a separate thread