Franklin Fueling Systems UPP PIPING, Руководство по установке

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12
HYDROSTATIC TESTING GRAPH
145 (10)
130.5 (9)
116 (8)
101.5 (7)
72.5 (5)
58 (4)
43.5 (3)
29 (2)
14.5 (1)
0
0 10 20 30 0 2 4 6 8 10 15 20 25 30 40 50 60 70 80 90
Pr
ess
ur
e PSI
(b
ar
)
Conditioning Time (mins) Test Reading Times (mins)
To Pass Test Pressure Must remain at 43.5 PSI (3 bar) or above
Maintain 145 PSI (10 bar) for 30 minutes
drop to 43.5 PSI (3 bar) for 90 minutes
87 (6)
PNEUMATIC TIGHTNESS TESTING PROCEDURE
The following testing procedure is suggested for guidance only and should in no way override oil companies or
local regulator’s requirements. Never exceed the pressure ratings of components shown on Table 1 and Table 2
when testing.
NOTE: Do not perform this test if the pipe surface temperature exceeds 70° C, which can occur when the site
ambient temperature is above 35° C and the pipe is exposed to direct sunlight.
NOTE: Measures shall be taken to shield HDPE pipe from effects of direct sunlight while tightness testing, or test
at cooler times of the day. Pressure testing should be performed maintaining the piping at constant temperature.
(E.g. avoid shadow to direct sunlight exposure during testing).
NOTE:
Maximum differential pressure on primary pipe when tightness testing secondary containment shall never
exceed 1 bar i.e. (Pressure in insterstitial space - Pressure inside primary pipe) = < 1 bar
Test Procedure:
• Record Temperature and Pressure at start of each test time.
• Condition and test the piping as follows:
1. Pressurize the piping to 10% of test pressure, hold pressure for 30 minutes and inspect for leakage or
pressure drop.
2. Increase pressure to 50% of test pressure and again inspect for leakage while holding pressure
for 30 minutes.
3. Increase pressure to 100% of test pressure and again inspect for leakage while holding pressure for
30 minutes.
• Record Temperature and Pressure at end of each test time.
• If results are within criteria of the table below, the Tightness Test is passed.
• Repeat this procedure on secondary piping. Follow the procedure with pressure relieved from the primary
pipe and the primary pipe open to the atmosphere.
PRESSURE TESTING SAFETY
Follow these guidelines when conducting pneumatic testing:
• Wear Safety glasses.
• Relieve air pressure before any corrective actions are taken.
• Allow only necessary and authorized persons in the proximity of pipe being tested.
• Restrain the movement of connections, joints and seals during testing.
Recommended Pipe Tightness Testing Pressure
Pipe Type Bar PSI
Primary pipe 3.5 50
Secondary pipe with Welded Reducers 1.0* 15
Secondary pipe with Rubber Reducers 0.5 7
*When you test secondary pipe at a pressure that is higher than the recommended test value in Table 5, first
pressurize the primary pipe to a pressure that is ≥ (Secondary Test Pressure – 1 bar).