Oxygen pipeline degreasing technology
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Nearly 3,000 meters of oxygen pipelines of various sizes (DN50–600) need to be degreased. Three methods are available for this purpose: trichloroethylene, carbon tetrachloride, and alkaline solutions. Which of these methods is the best? Is it possible to use steam for overall degreasing, which would simplify things greatly? This post was last edited by whb002002 on 2009-3-15 at 22:26
:hug: :victory: :lol :handshake The construction of oxygen pipelines, degreasing, purging, and ensuring airtightness are extremely important, as they are related to the safe startup and operation of the entire gasification system. It is necessary to pay close attention to every aspect, from procurement to the protection of pipelines and valves, as well as to the construction and processing procedures; no carelessness is allowed. Accidents involving oxygen pipelines and valves during the startup of the gasification process are quite common, so it is essential to take this seriously! We use alkaline cleaning; valves and fittings are cleaned with carbon tetrachloride or trichloroethane, followed by purging. This method yields good results at a low cost. There have been successful examples of low-pressure steam purging in the past; everyone should share the practices of their own companies so as to learn from one another. ;P :P :D
Isn’t using an alkaline solution requires heating, which is quite troublesome? What about using steam along with the alkaline solution?
We use carbon tetrachloride for degreasing; I’m not entirely sure about the exact process. If the original poster needs it, I can ask other technicians for help
Oxygen pipelines are generally degreased using carbon tetrachloride. Other commonly used degreasing agents include industrial dichloroethane, industrial trichloroethylene, industrial ethanol, nitric acid with a concentration of over 65%, alkaline degreasing solutions, and the non-ionic metal cleaning agent 664.
The method mentioned above requires degreasing each pipeline individually before installation, and then assembling them; is it possible to carry out degreasing all at once after the installation is complete?