Floating Roof Venting

Question

Floating Roof Venting

Civilpetro (Petroleum)

(OP)

23 Feb 10 09:59

The foreword in API 2000 says that "This standard does not apply to external floating roof tanks or free vented internal floating roof tanks"

If I have an external floating roof, how do I size the P/V valve and what parameters do I need use If I can't apply API2000? Thanks.

rmw (Mechanical) · Answer 1 · 2010-02-23 20:43:35

What exactly is your definition of an external floater?

rmw

Civilpetro (Petroleum) · Answer 2 · 2010-02-24 09:42:31

Im sorry, I meant Internal Floating Roof. A tank with a fixed roof and a floater inside.

IFRs (Petroleum) · Answer 3 · 2010-02-26 07:49:19

If this is an API 650 tank, venting for internal floating roofs needs to comply with API 650 Appendix H. Appendix H gives you two choices: (1) add circulation vents in which case API 2000 does not apply or (2) inert the vapor space in which case API 2000 does need to be checked.

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Floating Roof Venting