Is there a maximum area limit to explosion deflagration venting?

[designsimply]

I check International Fire Code. It define the relieve pressure of 20 psf (usually 20 psf - 40 psf) for explosion deflagration (release) ventings. But it doesn't define how big size a venting can be. For example, is there a maximum area limit of 200 sqft or 300 sqft, whatever? I don't have NFPA 69 Standard on Explosion Prevention Systems which IFC refers. I don't have Factory Mutual (FM) 4440 Standards regarding the design of explosion deflagration venting. I am design an explosion deflagration venting of 20'x72' with 16 panels. I don't like to design every panel as a release unit because of cost like cables, connections, etc. I am trying to design every two or four panels as a release unit but I've got to know whether there is a maximum area limit before I give my design proposal.

Thanks for any response.

 

[designsimply]

Any comment are appreciated. I just got some information about NFPA 68. The recommended bound limit panel area is 33 sqft. For Factory Mutual (FM) 1-44, it looks like no specific panel area limit but usually 125 -150 sqft is used for cost efficiency. By the way, I still don't have NFPA 68 or FM 1-44 Data sheet.

 

[DonPhillips]

Sounds like securing those standards is your next step.


Don Phillips

http://worthingtonengineering.com