Storage and Transportation Technology: [Weekly Topic] Discussion from 10-11-17 to 21 – Precautions for loading and unloading viscous media using marine loading arms
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This post was last edited by flute6 on 2010-11-17 09:35. Common viscous media include liquid sulfur, glacial acetic acid, asphalt, residue (heavy) oil, etc. What precautions should be taken when using marine loading/unloading arms to handle these viscous media? Please discuss actively: Note: 1) There are rewards for participants. 2) Please hide your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit the replies after posting them. 3) The answer will be visible immediately after responding. 1. The dock must be equipped with a purging system, as it would be extremely troublesome if the pipes of the loading/unloading arm became blocked. 2. The operating procedures for the loading and unloading arm must emphasize the need to perform purging after the loading and unloading operations are completed. 3. The loader arm manufacturer can be requested to install a heat tracing system (either steam or electric heat tracing) on the column portion of the loader arm. 4. Minimize the number of bends in the transmission pipes to avoid the formation of dead zones where heating cannot reach (it goes without saying that heating should be provided along the entire length of the pipes). 5. Try to use loading and unloading arms instead of hoses, as it is difficult to empty hoses, they are prone to contamination, and their lifespan is short.
Heat it before use, and clean the pipe after use
(1) The dock must be equipped with a purging system, as it would be extremely troublesome if the pipes of the loading/unloading arm became blocked. (2) The operating procedures for the loading and unloading arm must emphasize the need to perform purging after the loading and unloading operations are completed. (3) The loader arm manufacturer can be required to install a heat tracing system (steam tracing or electric tracing) on the column portion of the loader arm. (4) Minimize the number of bends in the transmission pipeline to avoid the formation of dead zones for heat tracing. (5) Try to use loading and unloading arms instead of hoses, as it is difficult to empty hoses, they are prone to contamination, and their lifespan is short.
After loading and unloading, bilging operations must be carried out to remove as much residual liquid as possible from the loading arm
Reply 1#: For the oil transfer arm 1, proper heating and insulation measures must be taken. 2 It should be purged thoroughly after the operation is completed. 3 The diameter of the drainage pipe must meet the required standards
Precautions: 1. Maintain a certain medium temperature. 2. Steam purging can be used; steam purging is required. 3. If steam purging is not possible, consider using a medium that does not solidify easily for replacement, while ensuring that no chemical reaction occurs between the two media. 4. End-point drainage and condensate removal can also be considered
1. Heating and insulation measures must be in place during loading and unloading; otherwise, the medium supplied by Party B will condense ； 2. After loading and unloading is complete, the pipelines, tank bottoms, and hold bottoms must be cleaned thoroughly to prevent contamination of the medium to be loaded or unloaded next time.
1 low-pressure steam pipeline, used to provide heating and insulation during loading and unloading processes to prevent the medium from condensing； 2 streams of low-pressure nitrogen, used for purging the main pipelines and related dip pipes.
Steam pipelines are used for heating and insulation, nitrogen pipelines are used for purging, and dip pipes with appropriate materials and diameters are selected
During loading and unloading, prevent the medium from condensing, and pay attention to insulation and heating.