Engineered for performance and durability, all smooth bore tips are manufactured from aluminum alloy which is then hard coat anodized, the critical orifice of the smooth bore is recessed 18 back into the taper. Just like kineticenergy tank rounds, flechettes are too long and thin to be stabilized by rifling and perform best from a smoothbore barrel. As basic as they may seem, these four simple steps will insure a successful transition. High quality, safe and innovative first responder products unmatched customer service. Most of the fog nozzles have flow rates ranging from 95 to 200 gpm. The smooth bore nozzle may be viewed by some as dated by some but if you take a little deeper look at history you can see some very sound reasoning in the smooth bore nozzle. You know you have a problem when you collect something like old hose nozzles. Smooth bore nozzles, for example, are simple, cylindrical nozzles designed to discharge in a straight stream. The revolutionary patented saberjet nozzle was introduced.
Part ii nozzle reaction as it relates to nozzle pressure. Low hosebeds, ladders on the side, smooth bore nozzles. Rowett jr one of the longest lasting debates in the american fire service is the smooth bore vs. A fog nozzle is a firefighting hose spray nozzle that breaks its stream into small droplets. After extinguishment, a water fog or broken stream may be directed out a window in the fire area to assist with removal of heat and smoke. Which of the following statements about smooth bore nozzles is most accurate. Then variable stream nozzles that allowed the operator to select a straight or fog stream that can be varied from a narrow to a wide angle were introduced in 1863. Smooth bore nozzles operate at high nozzle pressures. Ardmore fire department to begin using more efficient technology. C, creator of the 1 316inch smooth bore nozzle and tru hose spec. Solid streams smooth bore nozzles have been proven to be very reliable and effective on the fire ground for longer than anyone still involved in fighting fires.
Fire streams and the exponential engine firefighter. Ebooks, fantasy, fiction, graphic novels, historical fiction, history. The stream is directed into the secondstory window from 50 feet. Money back guarantee ensures you receive the item you ordered or get your money back. Before the late 1800s, the only fire stream available was a solid stream produced by a smooth bore nozzle. Selection of a smooth bore nozzle typically includes a valve with. The solid or smooth bore nozzle is the most basic of the four nozzle types, both in design and function. Smoothbore nozzles smooth bore nozzles generate effective streams at nozzle pressures as low 30 psi, but the stream will degrade at pressures over 60 psi. Mike kaloz attempts to ease this ongoing debate by discussing the history of the fog nozzle, the indirect fire attack and why. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
The operating pressure of the smooth bore is a range from 40 to 60 pounds per square inch psi, with 50 psi as optimal. Discover the best industrial fire hose nozzles in best sellers. The smooth bore nozzle is a fire stream producing device nozzle consisting of a nozzle valve and a pipe like extension that forms the fire stream used in conjunction with handline and master stream operations to deliver water in the form of an effective firefighting straight stream. In most cases, we left it up to the individual ffer, who was pulling the line, what type nozzle he wanted to use, just as fdny did at that time. A panel member of the ul study of the impact of fire attack utilizing interior and exterior streams on firefighter safety and occupant survival. A series of real scale, laboratory based experiments have been started to look specifically at the water discharge and distribution characteristics, the impact of hose streams on a. I have been in construction for many years and have found these during that time. Smooth bore nozzle advancement fire engineering training. Breakapart nozzles can give you the best of both worlds having both a smooth bore and a fog nozzle in one, but there are some critical points that need to be known in. The closest nozzle to this would be a 78inch smooth bore with a flow of about 160 gpm. A solid stream is produced from a fixed orifice and a smooth bore nozzle.
Before the late 1800s, the only fire stream available was a solid stream produced by a smoothbore nozzle. Typically, the smooth bore nozzle produces the greatest reachgpm combination of all nozzles while at the same time using the lowest engine pump pressures. The purchase of 12 new smooth bore nozzles for the ardmore fire department was approved at the carter county commissioners meeting. Smoothbore nozzle basics by tim adams as smoothbore nozzles work their way back on to hoselines all across the country at an. He applied various military tactics to his department and the fire service in general, and he published his first book, fundamentals of fire fighting tactics, in 1940. The smooth bore nozzle provides a clear and unobstructed path of water flow through the nozzle. Of the articles written detailing and explaining nozzles, many have covered the various types of fog nozzles and their operation. The point of breakover, as discussed in the ifsta fire streams book, refers to.
Learn more about the 78 smooth bore from task force tips. Smooth bore nozzles provide a high gpm flow with a nozzle pressure of 50 psi. How to calculate and overcome friction loss firerescue1. One of the most passionate topics in the fire service is which nozzle works.
Stop listening to salesmen and just get a gd rig that you can fight fire from. Smooth bore nozzles allow the bubbles to be discharged with little disruption and are therefore the most effective choice for caf. In addition, we replaced the fog nozzle on another. This nozzle eliminates the debate as to what is the best nozzle design a smooth bore or a combination nozzle. By firefighters, for firefighters copyright, smoothborevs. This project examines a variety of fire fighting hose stream characteristics related to flow, distribution and thermal impact from both solid and fog stream nozzles. The operating pressure of the smooth bore is a range from. This product is part of our smoothbore series product line and has the model number ff157. Nozzles 1 12 nozzles smooth bore c and s supply inc. The nozzle and the coupling 50 feet back are side by side with a bend pulled straight back away from the entry point. Place the nozzle down a short distance from the point of entry after stretching the line off the porch, allowing for easier forced entry. Smooth bore nozzles are operated at a nozzle pressure of 50 pounds per square inch psi when they are being used on handlines.
On september 10, 2001 akron brass held a special ribboncutting ceremony for its 62,000 square foot building expansion project off old mansfield road. It was up to the crew on each tour to choose which nozzle they preferred. Of the five, the latter four make up a group of nozzles commonly called combination nozzles because they produce both a straight and a fog stream. Since we are discussing pressure we can begin with the operating pressure of the smooth bore. There are different advantages and disadvantages with using a smooth bore nozzle and a fog nozzle. Smooth bore nozzles may be adjusted, resulting in different patterns. Engineered with a smooth, tapered waterway, tfts smooth bore tips provide the stream quality, reach, and penetration that you have come to expect from a traditional smooth bore. While many believe that smoothbore nozzles offer better. Nozzle knowledge is more than just smooth bore or fog. Smoothbore nozzles 101 by troy cool many articles have been written on the topic of different types of nozzles, including the smooth bore nozzle. Smooth bore tips, the next generation fire flow technology.
The original, and still to this day most common 2 12 smooth bore nozzle is known as the hydrant or iso stack. One of the greatest problems with this debate is that in many areas of todays fire service, it has resulted in firefighters knowledge of nozzles being limited to smooth bore or fog. The nozzle was attached to a fifty foot 1 12 inch fire hose. Smooth bore the smooth bore nozzle, which has been around for many years, could be considered the staple of the american fire service. It is because of this unobstructed path that smooth bore nozzles are the least susceptible to clogging from debris of all nozzles.
The smooth bore nozzle may be viewed by some as dated, but if you take a little deeper look at history, you can see some very sound reasoning in the smooth bore nozzle. The type of nozzle being used smoothbore, automatic nozzle or. The flow tests were done on the roof to show a worstcase scenrio of what the pressures and flows would be. In todays fire service, there are a multitude of nozzles available to firefighters that are capable of delivering various stream types and fire flows. Book depository books with free delivery worldwide. On the other hand, a manual nozzle with fewer features may pass debris more easily. That is our only concern, other than that we love it.
Hoselines may kink as smooth bore nozzles use less pressure. Smooth bore nozzles are different than adjustable or automatic nozzles in that they dont have any internal parts to control gallonage or pressure. These nozzles show the long history and changes that have come to the firefighting arena. If you have this nozzle please let me know if this has been a problem for you or not and how do you like it. Structural ops national fire protection association. One of the most passionate topics in the fire service is which nozzle works best, a smooth bore tip or a combination nozzle combination. The 212 playpipe with smooth bore stacked tips has been and continues to be a popular high flow handle nozzle. So study history and have options sorry there is no debate. These nozzles also contain the least amount of moving parts. All aluminum construction shutoff valve, tip, ball, handle with stainless steel fasteners. For this piece i will stick with the 2 12 attack line and smooth bore nozzles to best demonstrate this steady progression and the most recent step. While smoothbore nozzles lack the versatility of variable stream nozzles, the. The smooth bore nozzle may be viewed by some as dated, but if you take a little deeper look at history. We liked the 175 at 50 psi allot, but are concerned with the line getting kinked to easily due to the low pressure.
How many pounds of sandbags should be used to counter the reactive force generated by a 1. Rugged smooth bore nozzle with the largest waterway available for outstanding flow. Along with adequate residential suppression flow, the nozzle reaction developed by the 78inch smooth bore tip and the 1516inch smooth bore tip of 60 lbs and 69 lbs, respectively, are within the ability of an initial hose team of two firefighters to handle when utilizing 1. Discuss the advantages and disadvantages of smooth bore nozzles and fog nozzles. Gallons per minute was calculated by measuring the. Some advantages and disadvantages can range from the amount of agent that they are expending to the effectiveness of each nozzle. The system was rated at 500 gpm with a 65psi standpipe outlet residual pressure. Both will deliver approximately 160 gpm when pumped to 50. The acr rifles used smoothbore barrels to fire single or multiple flechettes tiny darts, rather than bullets, per pull of the trigger, to provide long range, flat trajectory, and armorpiercing abilities. Smoothbore vs fog what do you prefer for the interior attack. Geography of firefighting history of firefighting international association of fire fighters. Essentials of fire fighting 6th edition firefighter i chapter 16 fire streams. Smooth bore vs fog what do you prefer for the interior attack. Before the late 1800s, the only fire stream available was a solid stream.
With that in mind, let us examine a fixedgallonage, 200 gpm at 75 psi nozzle and a 78inch smooth bore tip. Multipurpose nozzle combination solid bore and fog. Smooth bore nozzles are very prone to clogging with debris. How to calculate nozzle reaction us forest service. This column is adapted from the authors book stuctural fire fighting. Discuss the advantages and disadvantages of smooth bore. Task force tips smoothbore products task force tips. If a smooth bore nozzle was used to control the fire, the bail may be partially shut to create a broken stream.
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