What type of pipe is suitable for strong-acid crude oil?
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The acid value of the crude oil is very high; the newly built facility is only one and a half years old, and there are numerous cases of corrosion and leakage in the pipelines, whose material is 15Cr0Mo.
This post was last edited by lovepds on 2017-1-11 at 11:46. For pipelines exposed to high temperatures (operating temperatures above 240°C) and high acidity, it is better to use austenitic stainless steel 316L containing Mo. In areas with high flow rates (above 30 m/s), it is recommended to use 317L or 316L with a Mo content of ≥2.5%. For material selection, reference can be made to SH/T3129-2012. The table on naphthenic acid and sulfur corrosion in API581 (Table 2.B.3) can also be consulted to determine the corrosion rate of various materials and thus select the appropriate one.
What device is it? Distillation......
This issue is clearly a design problem. . Of course, this is on the assumption that the design guidelines are for high-acid oils
The design did not match reality; it was only during the oil refining process that it was discovered that the acid value was very high.
This material needs to be acid- and corrosion-resistant; for specific details, you can also refer to the answers above
Analyzing the properties of raw materials before design is essential; otherwise, how can one choose the appropriate materials?