Semi-dry sludge pipeline
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In municipal sludge incineration projects, there are semi-dry sludge pipelines with PN250 pressure, driven by plunger pumps. Does this count as a pressure pipeline? I would appreciate some guidance from experts, thank you!
Pressure pipelines are classified by pressure rating, which indicates the pressure that the pipeline can withstand. It doesn’t matter what the medium is; the reading on the pressure testing instrument is what counts. For reference.
““Semi-dry”? The moisture content should be greater than 50%.
Yes, the moisture content is greater than 50%
Pressure pipelines are related to the medium, pressure, and pipe diameter; the medium can be gas, liquefied gas, steam, or liquids that are flammable, explosive, toxic, corrosive, or have a maximum operating temperature equal to or higher than their standard boiling point. Only those that meet all conditions simultaneously can be considered pressure pipelines; semi-dry sludge pipelines should not be classified as pressure pipelines
Regarding the issue of definitions, let’s take a look at how they are explained: https://baike.so.com/doc/6588343-6802117.html
Its scope is defined as pipes with a maximum operating pressure of 0.1 MPa (gauge pressure) or higher, whose medium is gas, liquefied gas, steam, or a liquid that is flammable, explosive, toxic, corrosive, and has a maximum operating temperature equal to or higher than its standard boiling point, and whose nominal diameter is 50 mm or larger. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases. For non-special media, it depends on the designed diameter and pressure