Does a Flame Arrester meet intent of Open Flow Path per ASME Sec. 8? 5

• Apr 3, 2012

1
• #2

moltenmetal

Chemical

Jun 5, 2003

5,504

CA

Yes, in my opinion it does.

 

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• Apr 3, 2012

1
• #3

don1980

Chemical

May 3, 2007

669

US

Yes, it's perfectly OK for a Sec VIII vessel to have a flame arrestor on an atm breather pipe. There's nothing in Sec VIII that even hints that this isn't OK.

You just have to size the line and account for the flow resistance of the arrestor.

 

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• Apr 9, 2012

1
• #4

moltenmetal

Chemical

Jun 5, 2003

5,504

CA

Do be aware that a flame arrestor can, in some services, become blocked with ice or other similar issues can occur. But properly designed and specified, you can treat it as an open flow path.

 

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• Apr 13, 2012

1
• #5

RaRo

Chemical

Jan 5, 2012

48

DE

On my site for direct atm. vents with flame arrester we justify (and trace) the clean service, or ensure it either using heated jacketed pipe+flame arrester or frequent inspection/cleaning.

 

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• Apr 17, 2012

1
• #6

786392

Petroleum

Dec 31, 2005

398

PK

Dear chemter Hello/Good Afternoon,
Actually the service conditions and environment plays havoc at times
since we fail to address even minor changes through a proper " mangement of change procedure" fulfillment.

It is the out come of such changed circumstance/service of more fithy and dirty nature than the original design parameters which deteriorates the flame arrestors functioning through clogging of sticking material onto the surfaces thus the actual "openness feature gets practically defeated"

We suffered an storage tank's top shell roof perphery seam joint failure due to similar changed service outcome
It's (the atmospheric tanks) flame arrestor installed vent got in a way blocked and
Tank got over pressurized but only the weak top joint gave way& tank was saved as per API 650 code of single fillet weld.

Hope this proves helpful.


Best Regards
Qalander(Chem)

 

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• May 8, 2012

• #7

BenThayer

Chemical

Jan 9, 2004

218

US

our site is not consistent. some are and some are not.

it is not uncommon to have a CBV with a flame arrestor and a graphite disc at low pressure in parallel.

 

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