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RAKtherm Pressure Test

 
CORPORATE PROFILE
PP-R and PEX pipes & fittings system for servicing a booming construction sector worldwide and in the Middle East in particular under the trade. More

PIPING SYSTEMS USAGE
RAKtherm…a versatile, and comprehensive system for water
and other fluid delivery, is used in applications of pressurized warm or
cold water in all modern residential. More

RAKtherm pipes due to their material properties expand when subject to pressure, which influences the test result, this may also be affected by differences in temperature of pipe and test medium resulting from a high thermal expansion coefficient of the pipe material, a change of 0.5 to 1 bar. Thus, the test medium should be kept at constant temperature throughout the test acc to DIN 1988 TRWI the pressure test must be performed 1.5 times of the operating pressure. Using cold water, the pipe system should be filled slowly and bled completely using calibrated measuring instruments that indicate pressure changes of 0.1 bar wherever possible. Measurements should be taken at the lowest point of the pipe system.

Where pipes and fittings have been welded, the pressure test should not be performed before two hours have elapsed after the last welding operation. The pressure test consists of two stages: For the first stage, a test pressure equal to the permissible working pressure plus 5 bar should be applied twice within 30 minutes at 10 minute intervals. Then the pressure should be checked. In case more than a 0.6 bar drop occurs over a period of 30 minutes at a rate of 0.1 bar/min, then a leakage is reported. The second stage should follow the first stage without interval and should last minimum of 2 hours. Then the Pressure drop should be checked. If the pressure drop is more than 0.2 bar and the pipe work shows signs of leakage, then the network should be corrected and the test must be repeated.


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Gulf Plastic and Converting Industries (TahweelTM) is a multifaceted manufacturing company based in United Arab Emirates, which supplies various

 
   

P.O.Box 30739
Ras Al-Khaima, United Arab Emirates
Tel: +971 7 2447124/ 5/ 6/ 8
Fax: +971 7 2447129

Email: info@raktherm.com
www.raktherm.com

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