HYDROTEST PROCEDURE OF HEAT EXCHANGER AT SITE. Can anyone please point me to a source for determining the correct procedure for hydrotesting the various types of heat exchangers? Thanks. ASME Pressure vessel/ Heat Exchanger Hydrostatic test (for Internal Another method to find out the minimum test pressure is using the MAP.
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Sometimes you have to employ test rings, etc. The BOT Nozzle to be assembled with a blind flange having provision for connecting a reciprocating pump Tighten the blind flanges.
ON HYDROSTATIC TESTING HEAT – Free Download PDF
Typically it are the vacuum jet overhead condensors gases and cooling water in the tubes. By joining you are opting in to receive e-mail.
Size px x x x x This means that the AI must reject any visible leakage of exposed tube-totubesheet joints procedurd as weeping around the tube-to-tubesheet connections during testing. This practice satisfies the TEMA requirement that leaks at the tube joints can be detected at least from one side. Check for leakage of all girth jointwhich are under pressure.
Heat Exchanger Hydrotesting Procedures Thanks, svanels! The air test is not a hydrotest, with the hydrotest you evaluate the structural integrity, with the air test you localize problems. Keep Inlet and outlet nozzle hyvrotest shell side open. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
The Code provides for testing at higher hydrostatic test pressures but most pressure tests are at the 1. For tubes welded to the tubesheet and subsequently expanded, the prudence suggests that in addition to such leak testing the welds should be fluid penetrant examined.
I don’t have a source, but I’ve done it many times on differet HeatX’s. There are special air tools for tube bundle testing.
If so then there maybe leakage through tube to tubesheet joint. Join your peers on the Internet’s largest technical engineering professional community.
Close this window and log in. If the exchanger service is for a fluid less viscous than water the likelihood of leakage in services may be very high if the Manufacturer relies on changes in the pressure gage reading to assess whether there is leakage from the channel side into the shell during hydrostatic testing.
Typically, the Manufacturer pressurizes the hydrotesf with air or nitrogen at 30 to 50 psi and applies a commercial bubble former to the tube-to-tubesheet joints. Also Check whether water coming out of bottom nozzle of shell.
ON HYDROSTATIC TESTING HEAT EXCHANGERS.pdf
Therefore, when they hydrostatically test the tube side, they rely on pressure loss in the tubes and channel during the holding period to indicate leakage through the tube-to-tubesheet joints.
I’ll be searching the TEMA standards. Promoting, selling, recruiting, coursework and thesis posting is forbidden.
The Code is a pressure containment safety code and the hydrostatic test represents only a test adequate for the typical heat exchanger not in a specific service where leakage is an issue.
Therefore, typical feedwater heater procurement specifications require helium leak sniffer testing mass spectrometer testing the tube-to-tubesheet joints during manufacture. Please copy and paste this embed script to where you want to embed Embed Script. Some Manufacturers use strip chart or circular recording gages but the graduations are similar to those of dial gages.
Leak rates vary inversely with fluid viscosity. Remember me Forgot password? We are a non-profit group that run this website to share documents.
Heat Exchanger Hydrotesting Procedures – Chemical plant design & operations – Eng-Tips
If there is pressure drop ,then investigate for the reason ason else reduce the pressure to corresponding design pressure for tube side and check for leakage. I remember air tests being conducted for some vessels they taped all flanges to detect leaksbut rather as an exception to the rule. For example, a minor tube joint leak in a water-to-water cooler presents no hazard, whereas leakage of a hyxrotest, flammable or explosive fluid could cause damage such as wire drawing, injury or death.