Cleaing Force Ratio - Pre commissioning

[Ebyate]

We are carrying out air blowing with Quick valve opening in the piping system. We fill the line to 5 bar and then open the valve. Now client is asking to show the CFR calculation to ascertain the force is adequate enough to clean the line.

While reviewing the CRF equation, it is flow rate applied versus the operating condition. As the service of the line is fuel gas and in the line list operating condition given is 0.3 bar with a density of 1.5kg/m3 and no mention of velocity nor flow rate. Could anyone advise on how to carry out calculation.

 

[saplanti]

I think they are the same application. First there is a pressure built-up and than release the pressure suddenly. I believe this cannot clean the manufacture debris. The process should last far longer to sweep the entire piping. In boilers this can go up to four days using steam.

This may be used for leftover dust due to accumulation before welding perhaps in the last attachment pipe/piping.

 

[saplanti]

I guess this EPRI article can give us a good inside;

http://docshare02.docshare.tips/files/12654/126544845.pdf

 

[saplanti]

Here is another;

https://www.researchgate.net/profil...-with-Gas-Blows.pdf?origin=publication_detail

This and the one earlier are very good publications to understand how it is done and give restrictions with calculation.

So we learn every day.

 

[saplanti]

This was even discussed earlier that I missed somehow;

https://www.eng-tips.com/viewthread.cfm?qid=347317