My department has been committed to automatic nozzles. As a result I have never had any formal training on the use of a solid steam nozzle on an interior fire. Where can I go to get some training on the proper use of a smooth bore nozzle or at the minumum read some articles on the proper use?
My department is starting to switch out all of the Akron combination nozzles with smooth bore nozzles. Let's discuss this!
What are the Pros & the Cons for both combination and smooth bores?
Which do you prefer?
I like the combination nozzles for the following reasons:
- Hydraulic ventilation (I can do that with a smoothbore)
- More control ( I can change if needed)(Does the pump operator know it, when you change?)
- Self cooling if needed for emergency purposes(Since when being 100% wet mean cool in a superheated environment?)
- Propane fires(Agreed)
-Car Fires ( Sweeping & etc....)(I can do that with a smoothbore)
My Concerns with the combination nozzles are
- STEAMING by the nozzle-man (
- Can your smooth bore stream cover the about 90% of the opening through which you are ventilating?
- Can your smooth bore stream dilute a gas / vapor leak? Not only propane or LPG, but amonia, chlorine, etc.
- Can the velocity of the straight stream gently sweep the accident scene without sending residue and debris
into the next county?
Self cooling was valid when we wore canvas turnouts back in the 50' and 60's, and I agree the it is (and was then)
potentially dangerous. However, a momentaneous water curtain or shield does have a certain cooling effect when
properly used when needed. For example, approaching a flaming gas leak that must be plugged or shut off. You cannot do it with a straight stream. (It's an old and classic operation from Texas A&M amongst other schools, but it works). If you don't believe me, try the exercise with both streams.
OK, for mop-up and overhaul you can close the shut-off to reduce flow, but the "softer" application force of the stream with
a closed angle stream can be more advantageous than the harder hitting straight stream.
Another point. Has anyone successfully applied AFFF foam with a smooth bore?
This is probably the hotest debate going in the FE forum. There must be a lot more subjects deserving such active and sincere response.
From Spain, keep safe over there.