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Products - PP-R PIPES & FITTINGS



Pressure Test

After installing Vesbo piping system, it is necessary to go through a pressure test. Unlike metal pipes, Vesbo like all other plastic pipe systems, has to follow different pressure test procedure owing to their mechanical properties of expansion when subject to pressure, temperature difference and coefficient of expansion.

A change in temperature of 10 K corresponds to a pressure change of 0.5-1.0 bar. Thus, the test medium shall as far as possible, be kept at a constant temperature throughout the test.

Test Procedure (According to DIN 1988 Part 2 or BS 6700: 1977)

Preparation for Filling Testing the System

For pressure testing, pressure gauges that allow reading of changes in pressure of 0.1 bar shall be used, fitted at the lowest possible point in the system.

Pressure testing for leakages must be conducted while pipe works are still accessible and before concealing or plastering.

Finished pipe work must be completely fitted with filtered water and vented.

Procedure

After pipe work is filled with water and completely vented to release air locks in the system, testing can begin:

(a)Test pressure = (permissible working pressure + 5 bars ) shall be produced 2 times within 30 minutes at 10 minute intervals.

Note : restore by hand pump to required test pressure after the 10 minute interval if the pressure drops. If leakage is detected, rectify the leakage are and repeat procedure.

(b)If no leakage is detected, for the next 30 minutes, check if the pressure has dropped by more than 0.6 bars and if there is any visible signs of leakage.

Note : If leakage is detected, rectify the leakage area and repeat procedure.

If pressure drops by more than 0.6 bars within this period, leakage must have occurred. Detect and rectify.

(c)If pressure drop is within 0.6 bars and no leakage detected, continue the test without restoring the required pressure for the next 120 minutes. During this time, it shall be checked if the pressure drop is more than 0.2 bars and no leakage is detected.

Note :If leakage is detected, rectify the leakage area and repeat procedure.

If pressure drops by more than 0.2 bars within this period, leakage must have occurred. Detect, rectify and repeat procedure.

(d)Pressure test is successful when all the above are met and the readings should be recorded.

Graphical Representation of Pressure Test Procedure




  PRESSURE TEST RECORD VESBO SYSTEM INSTALLATION
Development:  
Client/Owner: Date of Installation:
Address: Date of Pressure Test:


         Pressure
Reading
Results Test Criteria Remarks
Test Procedure (a) Bar/P.S.I Pass/Fail    
Pump to required test pressure
check for leakage
    Check for leakage  
1 st 10 min. record reading restore to test pressure     Check for leakage  
2 nd 10 min. record reading restore
to test pressure
    Check for leakage  
Test Procedure (b)        
Next 30 min. record reading restore
to test pressure
    Pressure drop <0.6 Bars and no leakage  
Test Procedure (c)        
Next 120 min.record reading     Pressure drop <0.2 Bars and no leakage