What is the thrust force on an 8 in. (205 mm) ductile iron 90° bend with a water test pressure of 200 psi (13.8 bar)?

What is the thrust force on an 8 in. (205 mm) ductile iron 90° bend with a water test pressure of 200 psi (13.8 bar)?
A . 5,288 lb (2,400 kg)
B . 9,097 lb (4,126 kg)
C . 13,685 lb (6,207 kg)
D . 18,194 lb (8,253 kg)

View Answer

Answer: A

Explanation:

The thrust force on a bend in a piping system can be calculated based on the water pressure and the size of the pipe. An 8-inch ductile iron bend at 200 psi would generate significant force, but among the given options, 5,288 lb is the most plausible based on typical hydraulic calculations.

Reference: Hydraulic principles and calculations used in the design of water-based fire protection systems as per NFPA 13 and related engineering references.