Field Hydro Testing of Above Ground Pipes
Fill with water at the lowest point in the line using a small diameter branch connection and vent the trapped air at the highest points.
Long straight sections may be vented using an inflatable ball or foam pig to expel any air and impurities.
After filling, the line must be pressurized gradually at 0.8 times working pressure dependent.
on the system and must be maintained for 24 hours allowing the pipe system to set. After the system is stabilized, the pressure must be raised gradually to the agreed field test pressure.