The Differences Between Wet and Dry Pipe Sprinkler Systems

The Differences Between Wet and Dry Pipe Sprinkler Systems

The Differences Between Wet and Dry Pipe Sprinkler Systems

This article will learn about the differences between Wet and Dry pipe sprinkler systems. You will learn about the differences between dry and wet pipe sprinkler systems, their cost, and their reliability. To get the most out of your fire protection investment, you should consider purchasing a dry pipe sprinkler system. Here is a quick comparison of dry pipe and wet pipe systems. The key differences between the two are listed below.

The Differences Between Wet and Dry Pipe Sprinkler Systems

Wet pipe sprinkler systems

Fire safety experts recommend that all commercial buildings be sprinkler-equipped by July 1, 2019. Under Local Law 26 of 2004, a business must install sprinkler systems by that date. However, a property may have to pay for an assessment of the building that is not equipped. Wet pipe sprinkler systems are more cost-effective and require less effort to restore protection. You need to replace the fused sprinklers and turn on the water supply to restart the system. However, this type of system is not recommended for sub-freezing environments. You may need to worry about impact damage to sprinkler heads.

Wet pipe sprinkler systems are the traditional fire sprinklers that release water as soon as the heat from the fire activates the nearest sprinkler head. Each sprinkler is activated independently and is not dependent on one another for water delivery. This reduces the chances of water damage from false alarms. Additionally, wet pipe sprinkler systems are inexpensive and low-maintenance. Consequently, they are a good choice for most commercial buildings.

Another common factor in wet pipe fire sprinkler system corrosion is the presence of air in the system. When air fills the system, it will reduce water delivery time to the activated sprinkler head. This process is called anodic corrosion. In addition, as the water levels rise, the water vapor in the system will be less oxygenated. This will result in less water delivery time to the sprinkler head, essential for life safety.

Wet pipe sprinkler systems must include a relief valve as required by NFPA 13. The relief valve helps alleviate the problem of thermal expansion. As the temperature rises, trapped gases expand, increasing the static pressure inside closed sprinkler systems. This causes false alarms, as the trapped gasses are more significant than the allowable 175 psi. The water will also flow past the flow switch. If this happens, the sprinklers will not activate.

Differences between the two

The main differences between a wet pipe sprinkler system and a dry pipe system are how water is released. Wet pipe systems are not reliant on a fire hydrant system, while dry pipe systems are. However, both types are designed to prevent fires by discharging water in response to an active fire. In some cases, a dry pipe system can be installed in a building.

The main difference between a wet pipe and a dry pipe sprinkler system is pressurized nitrogen or air to release water during a fire. A dry pipe sprinkler system is best used in areas below 400 degrees Fahrenheit. It also reduces the amount of property damage. Dry pipe systems are typically used in unheated warehouses, parking garages, and attic spaces.

Wet pipe systems are more complex, resulting in higher overall installation costs. They also tend to require more maintenance and service labor. Additionally, they may have strict size limitations that limit their capacity. Additionally, dry pipe systems require a longer response time than wet pipe systems due to the long distance between the sprinkler head and the fire source. 

While these differences may seem minor, they can increase fire response time and potentially higher content damage. A wet pipe sprinkler system is designed to respond to fires with a sprinkler head attached to the piping automatically. When a fire is detected, water will discharge from the sprinkler head, preventing a fire from spreading. While a wet pipe sprinkler system is more effective than a dry one, it is unsuitable for all environments. For example, fires may occur in freezing areas.

Cost of a dry pipe sprinkler system

While the cost of a dry pipe sprinkler system is comparable to the cost of deluge systems, it is a factor to consider when choosing the right sprinkler system for your business. The biggest downside of this type of system is its lengthy response time. 

To put out a fire in a dry pipe system, water must be released through a gas line, delaying the water discharge until it has passed through the fire-suppression system. Additionally, a dry-pipe system may not allow for future additions, and its complexity may limit the size of the sprinkler system.

Choosing a dry pipe system can be expensive, but it is worth it if you’re concerned about soaring maintenance costs. While a dry pipe sprinkler system does not require frequent chemical cleaning, it does require routine maintenance. A frozen system can be costly to repair and can even result in inoperable status. Regular inspections and maintenance can help you get the most out of your existing system. They will help you maximize its value.

Dry pipe sprinkler systems require routine maintenance, but they are often more effective than wet ones in many situations. Regardless of the type of system you choose, it’s essential to keep the pipes free of condensation to ensure that they’re effective. A dry pipe sprinkler system will delay water from reaching the sprinkler head for 60 seconds. While this delay can worsen the fire, the benefits far outweigh the negative aspects.

The cost of installing a dry pipe sprinkler system is dependent on several factors, including the size and location of the project. Some features cannot be covered in an article. The only way to truly understand them is to obtain a detailed quotation. For example, pipework can be made from copper or plastic. Plastic pipework is the most affordable and can be hidden behind fireproof walls. This can reduce the installation costs by several hundred dollars.

Reliability of a dry pipe sprinkler system

A dry pipe sprinkler system may be considered more reliable than wet-pipe systems, but this is not necessarily the case. While the former is simpler to install, it does not function as reliably as a dry pipe system. This is because wet-pipe systems can be damaged if frozen, whereas a dry pipe system keeps water in the piping. Therefore, the dry pipe system requires more maintenance than a wet-pipe system and may not be as reliable.

To estimate the reliability of a dry pipe sprinkler system, a few sources must be used. These include the OREDA data book, IEEE Standard 500, and CCPS Guidelines for process equipment reliability. Unfortunately, a systematic approach to collecting and analyzing these data is impossible without a time-dependent model. As a result, it is very difficult to determine how reliable a sprinkler system is about other factors, such as fire or sprinkler modifications.

To assess sprinkler reliability, the authors of Malm and Pettersson analyzed the different failure modes. However, the failure data from nuclear installations are difficult to compare with domestic sprinklers because the safety culture of the nuclear industry is different from that of the civilian sector. Moreover, the failure data from these sources can be hard to compare because different countries and authors apply different naming conventions for these failure modes. These differences may also affect the reliability of sprinkler systems.

A dry pipe sprinkler system is more reliable than wet-pipe systems in fire protection. But this type of fire suppression system requires special attention to prevent premature failure. Dry pipe systems are more vulnerable to corrosion than wet-pipe systems. A nitrogen-based corrosion control system can help slow down the corrosion process. However, it is essential to remember that internal corrosion debris can impede water delivery and cause obstructions in the pipe system.

Design restrictions of a dry pipe sprinkler system

There are several design restrictions for dry pipe sprinkler systems:

  1. This type of sprinkler system has size restrictions. It can accommodate only a certain amount of water per sprinkler head.
  2. Fires may become much larger than the size of a sprinkler head before the sprinkler system can introduce water to the fire. As a result, the water delivered will be significantly larger than if the system were to be used with wet pipes.
  3. There are other limitations of dry pipe sprinkler systems.

The most significant disadvantage of dry pipe sprinkler systems is their capacity. Dry pipe sprinklers are often more expensive than wet pipe sprinklers, so it is wise to consider your budget when planning a system. Wet sprinkler systems can be looped or tree systems, whereas dry pipe sprinklers are limited to looped systems. Gridded systems can be installed in looped or tree systems to reduce branch pipe sizes. 

This reduces friction loss and helps prevent rusting. However, gridded branch systems are not as effective as looped systems because they do not benefit from flow down gridded branch lines. However, despite these drawbacks, you can still install a dry pipe sprinkler system with a larger diameter branch pipe.

The other disadvantage of dry pipe sprinkler systems is the cost of installation. Unlike wet pipe systems, the dry pipe system has specific installation requirements. It must be pitched to ensure proper water delivery. This can result in costly damage to property. Dry pipe sprinkler systems require a higher initial cost and more work. However, dry pipe systems offer automatic protection against fire when wet pipe systems freeze and are ineffective.