What material is commonly used for pipes in fire sprinkler systems?

The use of steel or CPVC in fire sprinkler systems is prevalent due to their unique properties that make them suitable for high-pressure applications and fire protection. Steel pipes are favored because they are robust, resist high temperatures, and maintain structural integrity under stress, making them ideal for transporting water in fire suppression systems. They can withstand the pressures involved in a fire sprinkler system and can be easily welded or joined for secure connections.

On the other hand, CPVC (chlorinated polyvinyl chloride) is increasingly popular due to its resistance to corrosion, lower weight compared to steel, and ease of installation. It can handle the temperatures associated with fire suppression systems (up to a certain limit) and is also less expensive than steel, which makes it an attractive option.

The other materials listed in the alternatives have limitations that make them less suitable for use in fire sprinkler systems. For example, while copper is a viable option for some plumbing applications, it is expensive, and aluminum lacks the necessary strength for high-pressure scenarios typical in fire sprinkler systems. PVC is not typically used for fire sprinkler systems because it cannot withstand the high temperatures generated during a fire. Similarly, rubber and cast iron are not optimal materials; rubber is not suitable for rigid connections under high pressure,