4 replies to this topic

[farid.k]

Dear team,
How to know that,
1) the need of foam system for methanol storage tank? Do we need to inject foam solution in side the tank during fire?

2) letsay methanol stored in internal floating roof, is it at the top of the tank must have dedicated nozzle for the foam solution to be injected during fire case?

3) the need of sprinkler at the tank for cooling (for nearby tank) or is it can just by firewater monitor? I guess must do the heat radiation calculation and if the value exceed 25 kW/m2, fixed foam monitors is suffice.

[breizh]

Farid.k

Consider the document attached to support your work.

 

Good luck

 

Breizh

[Zauberberg]

According to NFPA 30 (Flammable and Combustible Liquids Code), Methanol is Class IB liquid. The Code says: "fire-extinguishing system in accordance with an applicable NFPA standard shall be provided or shall be available for vertical atmospheric fixed-roof storage tanks larger than 50,000 gal (190 m3) capacity, storing Class I liquids, if located in a congested area where there is an unusual exposure hazard to the tank from adjacent property or to adjacent property from the tank."

 

You can start from there and see whether the tank in question qualifies for extinguishing system.

[farid.k]

Thanks breizh for the material. I get the percentage for the foam water mixture and i can make this as basis.. Thnks to zauberberg too.will refer to nfpa later.Any more can share especially for those who has experience to handle methanol storage? Maybe can share just a bit more detail for the typical fire water system at methanol

[Zauberberg]

There are no prescriptive measures that can be optimal measures at the same time. We don't have any details about your particular case - the volumes, configurations, plot plan, other units in vicinity of the storage area, fluids involved, pressures, temperatures, codes and regulations that are mandatory to be followed, the extent of damage the plant/company is ready to accept etc. etc.

 

There is no "one size fits all" approach so you need to share a lot of details.