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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Promoting, selling, recruiting, coursework and thesis posting is forbidden. Click Here to join Eng-Tips and talk with other members! When determining whether to require the Manufacturer to perform leak tests. It demonstrates that relying on gage indication of pressure loss to assess leaks weeping that would not be visible during hydrostatic testing does not indicate whether there are such small leaks. It shows that using test gage pressure loss to determine if there is leakage through the tube joints from the channel to the shell of heat exchangers in which the back side of the tubesheet is not visible does not disclose weeping leakage from the channel into proceudre shell through the tube-to-tubesheet joints.
Designers, Users, and Manufacturers should agree on the definition of joint type and to the nondestructive Tests NDT for all welded joints. Sometimes you test the bundle, the the shell side, sometimes the tube exchange together with the shell side, etc. The language of the waiver in UG 2 g needs clarification with respect to using fixed tubesheet exchangers for lethal service, possibly with a specific exception allowing their use with appropriate precautions.
This practice satisfies the TEMA requirement that leaks at the exchagner joints can be detected at least from one side. Hydrotest Procedure Ball Valve.
I don’t have a source, but I’ve done it many times on differet HeatX’s. The minimum hydrostatic test pressure at room temperature shall be 1.
We do the test on all the tubes, but thouroughly procedurs is done with the vacuum condensors, because you need to know in an early stage if it is retubing or pluging, and plan for replacing the whole bundle.
HYDROTEST PROCEDURE – PDF Free Download
Hydrotest medium for CS exchanger should not have chloride content more then 25 ppm. There are special air tools for tube bundle testing.
Connect the pressure gauges to the top nozzle blind flange. We need your help! I have developed standard procedures for overhauling heat exchangers such as found in oil refineries and chemical plants. Remember me Forgot password? Despite the Code rules about the unacceptability of leakage through the joints of pressure vessels and heat exchangers, the TEMA and API standards do not require leak testing every heat exchanger and Manufacturers will not perform such leak tests unless Users request them.
We are a non-profit group that run this website to share documents. In addition check nozzle flange joints between top and bottom heat exchanger for leakages.
Hydrotest Procedure for Pipeline example. Join your peers on the Internet’s largest technical engineering procerure community. Severe wormholing can shorten feedwater heater life. Of all the turnarounds I remember, heat exchangers have always been tested with water. Please copy and paste this embed script to where you want to embed Embed Script. Typically it are the vacuum jet overhead condensors gases hyydrotest cooling water in the tubes. Keep the pressure for 1 hour. Typical procurement specifications for high-pressure hydrrotest heaters require 10 cycles of bringing the channel to the hydrostatic test pressure followed by dropping the pressure to atmospheric for each cycle.
The shell side and the tube side are to be tested separately in such a manner that leaks at the tube joints can be detected from at least one side. We need your help to maintenance this website.
Tube-to-tubesheet joints of some types of shell-and-tube heat exchangers, such as fixed tubesheet designs and closed feedwater heaters in which the channel is welded to the shell, are visible only from the channel side with the shell side under pressure and the channel side at atmospheric pressure.
What type porcedure you planning to test? Steven van Els SAvanEls cq-link. Download Now White Paper: Narmada Hydrotest Procedure Rigid -Rev 1.