Emergency vent design according to API 2000: Manhole vent sizing?
Emergency vent design according to API 2000: Manhole vent sizing?
(OP)
Hi everyone
I am busy with a calculation to determine if an existing manhole vent on a formalin storage tank would be sufficient in case of emergency venting. I have calculated all the required flow rates based on the amount of energy dissipation required but I am having a hard time relating that to the required manhole diameter.
Can anyone maybe point me in the right direction?
Regards
I am busy with a calculation to determine if an existing manhole vent on a formalin storage tank would be sufficient in case of emergency venting. I have calculated all the required flow rates based on the amount of energy dissipation required but I am having a hard time relating that to the required manhole diameter.
Can anyone maybe point me in the right direction?
Regards
RE: Emergency vent design according to API 2000: Manhole vent sizing?
RE: Emergency vent design according to API 2000: Manhole vent sizing?
The API-2000 venting requirements have been updated as well.
So if you apply the current codes to an existing tank, it may or may not calculate out.
I would think those fire-exposure heat-input numbers are pretty approximate at best, so I wouldn't be in too big of a hurry to update it just based on code updates.
If the existing manway is a shop-fabricated long-bolt manway, there is, or was, an equation in API-2000 for flow rate. It may have been omitted or moved to an appendix.
If you're adding an emergency vent to an existing manway, then see the Shand & Jurs, etc., information.
RE: Emergency vent design according to API 2000: Manhole vent sizing?
I'm Darren Sanderson, QC Manager with Hall Tank Company in North Little Rock, Arkansas, USA and I am a UL Standards Technical Panel (STP) Member.
Above suggestions are good showing the Emergency Vent suppliers that may offer great references. I'll add the company Morrison Brothers too. Both Clay & Bailey and Morrison Brothers have representatives who also are UL STP members.