Question, since we've got warehouses with huge amounts flammable material but not hydrocarbons.... are there not some SERIOUS sprinkler systems required for gas/oil facilities like this? Our largest plant is about 950,000 square feet, and only about 450k of that is warehousing, but that plant has 40-some-odd fire pump stations positioned outside the building capable of about 55,000 gallons per minute total if all were activated. Obviously, the system is zoned and there are more sprinkler nozzles per SF where the flammables are stored. Seems like there should have been some way to at least prevent a total loss? Even when fires have gotten to the inside surfaces of our roofs, which are coated with dust, oil, paint and other flammable liquids, any conflagrations are usually kept to less than a few thousand square feet, max.
With hydrocarbons, you make floating fire.
Case study is the Chemtool fire - I’ve heard numbers thrown around as much as 33 million gallons of water was thrown at that fire.
One the auto ignition temperature is achieved, the moment that oil hits air, it’s going to combust. This is going to back feed throughout all the piping into the piping. This will ignite through the vents on top of the tanks.
It will eventually cause an explosion as a fuel air bomb of sorts.
All while any product on the ground - cases of quarts, bag in a box, puddles of products in water - will eventually ignite. On top of that, you’re going to have a steam issue. The amount of heat generated by the lubrication oil on fire would cause enormous amounts of steam.
Beyond that, now you have a gigantic amount of hazardous water to deal with. In both Chemtool and this case, it ends up in the local water way.
The only real way to fight the fire is to remove the fuel. This is how refinery fires are fought. Containment with water to cool important areas. Remove the fuel. Same principle of what happens on off shore rigs. Remember the deep water horizon burned for days until the Q4000 could drill a relief well. And they had the ocean to pour on it. They let it burn until the rig collapsed on itself from the heat.
I’m assuming the fire valves in this case, failed due to the amount of heat generated by the fire. As API 607 is only rated for 1400 degrees to 30 mins.
Now could a sprinkler system stopped a motor fire, or something small? Absolutely.
If it was a lightning strike that ignited a tank to begin with… well, that’s an entirely different story.
In Chemtool’s case, it was a broken high pressure heat transfer fluid line. It hit air at over 600f. Instantly ignited and formed a blow torch. Which, ignited everything around it. The sprinkler system kicked on, but you already had a grease fire. Now you have a floating grease fire.
Water just isn’t a good solution. Fire fighting foam works, but is incredibly toxic. And expensive.
There isn’t a real good answer.
Personally, I would say in close tanks. Practice safety. And if something does happen… just let it burn.