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Warning: Cannot modify header information - headers already sent by (output started at /home/tig/www/aalf/www/wiki/extensions/DDNAuthPlugin.php:4) in /home/tig/www/aalf/www/wiki/includes/WebResponse.php on line 10 http://www.aalf.org/wiki/index.php?action=history&feed=atom&title=HaaseSnow120HaaseSnow120 - Revision history2026-11-02T21:46:21ZRevision history for this page on the wikiMediaWiki 1.13.3http://www.aalf.org/wiki/index.php?title=HaaseSnow120&diff=9479&oldid=prevHaaseSnow120: New page: In accordance with ASME Section VIII Division I, hydrostatic pressure is conducted on the pressure of a single.More design pressure. In case a vessel is design for holding 1.0 kg/cm2.g p...2012-02-21T13:29:09Z<p>New page: In accordance with ASME Section VIII Division I, hydrostatic pressure is conducted on the pressure of a single.More design pressure. In case a vessel is design for holding 1.0 kg/cm2.g p...</p>
<p><b>New page</b></p><div>In accordance with ASME Section VIII Division I, hydrostatic pressure is conducted on the pressure of a single.More design pressure. <br />
<br />
In case a vessel is design for holding 1.0 kg/cm2.g pressure, the hydrostatic pressure test must be done at 1.5 kg/cm2.g.<br />
<br />
Hydrostatic test is also applied to existing equipments and pipe lines to check on for leakage after being repaired or maintained. Hydrostatic job number increases during plant Turnaround period. Because during those times, nearly all of equipments are opened for checking, inspection, clean-up, repairing, replacing song or performing internal modification.<br />
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The use of high pressure is the main supply of hazards linked to hydrostatic pressure test. Hydrostatic test stores energy. Questionable could damage the facilities and endanger worker's safety. You ought to have included this into the own hazard identification.<br />
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Safety Checklist:<br />
<br />
To avoid accident from hydrostatic test operation, we need to make good preparation just before perform the test, through the pressurization process and depressurizing operation. These jobs should be stated in the form standard operating procedure. And listed here are the protection checklists for every stage.<br />
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Hydrostatic test preparation:<br />
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Specification sheet in the equipments or pipe line, which mentions pressure and temperature designs are available and handle.<br />
<br />
* Hydrostatic test pressure and temperature standard are actually clearly defined inside related document.<br />
* Supported documents such as P&ID and isometric drawing can be found and conform to as built facilities in the field.<br />
* Pressure test planning should be given to all relevant sections within the plant site no less than a couple of days prior to the execution date.<br />
* Make good coordination among related sections which entail within the test.<br />
* All test equipments and tools shall be inspected for wear and damage.<br />
* Pressure measurement tools are calibrated along with their statuses of calibration continue to be valid.<br />
* Pressure gauges employed in quality have adequate capacity. The gauges are recommended to own 150% from the maximum allowable working pressure.<br />
* Pressure gauge is safety type, with blowout back.<br />
* Pressure gauges have to be installed in a proper location in order that it can easily be read and never create additional hazards on the hydrostatic test or expose personnels towards the vessel being tested.<br />
* Each of the temporary tools (for example valve, fitting, hoses, flanges, blind plate, etc) should be rated more than the utmost hydrostatic pressure.<br />
* Isolate other equipments and pipe lines that don't use in the hydrostatic test.<br />
* Vents can be found and installed the high points to vent air. Look into the vent line before testing and be sure it is not blocked.<br />
* Choose drain valve at the cheapest time order to completely empty the vessel and pipe.<br />
* Safety relief valve is definitely installed. Safety relief valve setting is 1.Five times maximum allowable working pressure.<br />
* Safety relief valve is calibrated.<br />
* Isolate quality area and surround it keeping the vehicle safe line. Put appropriate safety sign during this area.<br />
* Do not allow individual that doesn't have a relation using the hydrostatic test, to enter test area.<br />
* If at all possible perform the test coming from a remote area.<br />
* Make certain that all pipe and vessel supports will be in good and possess been inspected.<br />
* All hoses must be restricted.<br />
* Temperature of water should be a lot more than 16oC (60 F).<br />
* The hydrostatic-pressurizing pump is fully gone keeping the vehicle safe relief valve.<br />
* Wear proper personal protective equipments.<br />
* Don't start quality in case a issue is identified.<br />
* Issue a piece safety permit by authorized personnel.<br />
reference: [http://www.1800pools.com/SP1056_Cycolac_Spring_Loaded_Hydrostatic_Relief_Valves.html hydrostatic valve]</div>HaaseSnow120