What does hydrostatic testing in NFPA 16 verify?

What does hydrostatic testing in NFPA 16 verify?

• A. The ability of the system to withstand hydrostatic pressure without leaks.
• B. The integrity of piping and components under pressure after installation.
• C. The foam concentration stability.
• D. The electrical insulation of pumps.

Answer: (B)

Hydrostatic testing checks the installed system’s mechanical strength and tightness. After installation, the foam-water piping, valves, fittings, and other components are filled with water and pressurized to a specified test pressure for a set period. If any joints, seals, or components leak or show deformation under pressure, they’re identified and corrected before the system is put into service. This test focuses on the ability of the piping and components to withstand internal pressure, not on foam chemical properties or electrical aspects. Foam concentration stability and pump electrical insulation are addressed in other tests or procedures, not during hydrostatic testing.

Hydrostatic testing checks the installed system’s mechanical strength and tightness. After installation, the foam-water piping, valves, fittings, and other components are filled with water and pressurized to a specified test pressure for a set period. If any joints, seals, or components leak or show deformation under pressure, they’re identified and corrected before the system is put into service. This test focuses on the ability of the piping and components to withstand internal pressure, not on foam chemical properties or electrical aspects. Foam concentration stability and pump electrical insulation are addressed in other tests or procedures, not during hydrostatic testing.