API 2000 or 2557: Vapour treatment flow calculation
API 2000 or 2557: Vapour treatment flow calculation
(OP)
Hi all,
Im trying to calculate the amount of vapour expected from several tanks filled with Methanol to size the vapour treatment header. API 2000 does mention thermal outbreathing but i'm in doubt if this is referring to normal flows or sizes to maximum emergency scenarios. Does API 2557 elaborate on this? I'd like to know befor i buy a publication that is of no use to me;)
Im trying to calculate the amount of vapour expected from several tanks filled with Methanol to size the vapour treatment header. API 2000 does mention thermal outbreathing but i'm in doubt if this is referring to normal flows or sizes to maximum emergency scenarios. Does API 2557 elaborate on this? I'd like to know befor i buy a publication that is of no use to me;)





RE: API 2000 or 2557: Vapour treatment flow calculation
RE: API 2000 or 2557: Vapour treatment flow calculation
RE: API 2000 or 2557: Vapour treatment flow calculation
RE: API 2000 or 2557: Vapour treatment flow calculation
RE: API 2000 or 2557: Vapour treatment flow calculation
RE: API 2000 or 2557: Vapour treatment flow calculation
For filling or emptying a tank, for high flash point materials, the outbreathing is a little bit more than volume for volume, inbreathing is volume for volume. For low flash point materials, the outbreathing volumes are higher.
API 2000 also has the relieving capacity for fire, should that be necessary.
There's a discussion how the thermal outbreathing volumes were established in one of the appendixes. If I remember correctly, they were based on hot gasoline entering a hot tank resulting in some of the gasoline flashing and having to be relieved. The thermal inbreathing is based on a rainshower on a hot tank cooling and contracting the vapor contents.
Shand and Jurs or Protectoseal who sell tank breathing valves, pad gas systems, etc usually have exerpts from API 2000 in their catalog. You could look at them and see if it meets your needs.