Noise calculation during steam blowing 1

[Cguizza]

Dear All
i m preparing a procedure to carry out the steam blowing pipe cleaning. one of the points that i m evaluating is the noise that will be generated during the activity.
my question is which standard should i apply and which formula..
the pipe will discharge steam directly in atmosphere.

thanks you all

 

[LittleInch]

Try looking at these previous answers.

A straight pipe to atmosphere will probably be close to sonic velocity and you'll hear it in the next town....
If this is for anything more than a few minutes, you're going to need a silencer for sure.

https://www.eng-tips.com/viewthread.cfm?qid=276644

https://www.eng-tips.com/viewthread.cfm?qid=514582

there are links there to steam silencer vendors.

Try also people like spirax sarco.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Heaviside1925]

API 521 has good guidance for sound power level. I know I've used it before for steam blow noise calcs. As LI noted about you being close to sonic velocity. If this is being performed in a very remote location, you may be okay with local precautions, but you really must consider how loud this could be, on the order of broke windows and blown eardrums, serious concussive injuries. Consider the old-time factory steam whistle but add a couple orders of magnitude.

 

[Cguizza]

thanks you much @heaviside1925, I'll make a excel file based on the API 521.

Mr. LittleInch thanks for your replay.. what we need is prove showing that the silencer is required..

thanks

Cristian

 

[pierreick]

Hi,
Should be below 90 dB at 3 meter from the source i.e silencer is needed .

https://www.wkcgroup.com/tools-room/vent-noise-calculator-api-521/

Pierre

 

[0707]

In addition to what Pierreick said, your security service must take appropriate measures to prevent potential accidents, in the vicinity of the unit subjected to blowing, with delimitation of the area and warnings of possible hazards.

 

[georgeverghese]

If you are letting down high pressure steam into this pipe, you also have noise at the letdown valve in addition.