What materials are acceptable for constructing sensing lines in fire pumps?

Brass, copper, or stainless steel are the preferred materials for constructing sensing lines in fire pumps due to their durability, corrosion resistance, and ability to withstand high pressures. Brass and copper are commonly used in plumbing and fire protection applications because they provide a good balance of strength and resistance to corrosion, especially in environments where water or other liquids may be present. Stainless steel is also a highly resistant material that can handle extreme temperatures and is less susceptible to wear.

The choice of these materials is critical for the reliable operation of fire pumps since the sensing lines must accurately transmit pressure information. If the materials were to corrode or break down, it could compromise the performance of the fire pump, which is essential in fire protection systems. In contrast, the other options include materials that either lack adequate strength, are prone to corrosion, or are not commonly used for this specific application, which can introduce risks and failure points in the system.