Re: Bursting Pressure

From: <rajendra>
Date: Fri Oct 29 2004 - 03:20:00 EDT

Hi cckla,

Working pressure, test pressure and bursting pressure are requirements that are specified in the contract by the Client. Working pressure refers to the normal pressure at which the system performs. Test pressure refers to the pressure at which the system is tested to prove it's efficacy with respect to it's system demand and Bursting pressure refers to the ultimate pressure which the system must satisfy, with respect to it's normal working.
For example, in standard water supply piping in India, the test pressure for the pipes and valves is 1.5 times the working pressure. For valves, the bursting pressure is specified at 2 times the working pressure. The safety factors like 50% and 100% in the above example take care of surges or fluctuations the system may undergo under various working conditions such as water hammer etc. The Safety Factor takes care of the normal fluctuations so that even under those conditions, the system is not subject to undue stresses which may eventually lead to it's failure. Remember the last straw on the camel's back?
In case of one type of fire hoses, the normal pressure is 14 Bar, test pressure is 21 Bar and Bursting pressure is 35 Bar. You can well imagine the stresses the fire hose will be subject to in an actual fire fighting situation. The limit of 35 Bar on the bursting pressure explians the point. Regards,
Rajendra Bajikar.
India.

cckla <cckla@pd.jaring.my> wrote: Dear all piping specialists,

What is pipe bursting ?
How is it different than hydrostatic test ? What should be the respective pressure or ratio compared to operating pressure ?

Please guide me.

Thanks.

Regards,
cckla

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Rajendra Bajikar.

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Received on Fri Oct 29 03:20:00 2004