Re: Hydrotest....

From: <Christopher>
Date: Fri Sep 02 2005 - 17:24:00 EDT

On Sep 2, 2005, at 12:01 PM, Narendra Roy wrote:

> Dear Sirs, I am new in piping.... please tell me the full form of
> Hydrotest. Shall it be hydrostatic test or hydraulic test?
The correct term (I think that's what you're asking for) is hydrostatic test. That means filling the system (completely) with water, then closing it up tightly and pumping in more water until a multiple of the system's maximum allowable working pressure is reached. Normally the multiple, which is called the proof factor, is 1.3 for ASME Code vessels, but it can be different if the system is intended to operate at other than room temperature.

Sometimes the vessel can be pressurized with air,called a pneumatic test, but that is extremely hazardous, since the pressurized air stores an enormous amount of energy. If something lets go the vessel can be thrown hundreds of feet.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=gS2XLLmsRngpodm5IC-PnbbZ8j9iWWUypzNbv-5OBZpgMVSgjjZpz7WFKoU53dp14LEy4VuC-8zkBQ">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Fri Sep 02 17:24:00 2005