Polyethylene Water/Sewer - JM Eagle

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Other pressure testing procedures may or may not be applicable dependingupon piping products and/or piping applications.4.4 Test PressureTest pressure may be limited by valves, or other devices, or lower pressurerated components. Such components may not be able to withstand the requiredtest pressure, and should be either removed from, or isolated from thesection being tested to avoid possible damage to, or failure of these devices.Isolated equipment should be vented.• For continuous pressure systems where test pressure limiting componentsor devices have been isolated or removed, or are not present in thetest section, the maximum allowable test pressure is 1.5 times the systemdesign pressure at the lowest elevation in the section under test.• If the test pressure limiting device or component cannot be removed orisolated, then the limiting section or system test pressure is the maximumallowable test pressure for that device or component.4.5 Test DurationFor any test pressure from 1.0 to 1.5 times the system design pressure, thetotal test time including initial pressurization, initial expansion, and time attest pressure, must not exceed 8 hours. If the pressure test is not completeddue to leakage, equipment failure, etc., the test section should be de-pressurized,and allowed to “relax” for at least 8 hours before bringing the testsection up to test pressure again.4.6 Pre-Test InspectionTest equipment and the pipeline should be examined before pressure is appliedto ensure that connections are tight, necessary restraints are in placeand secure, and components that should be isolated or disconnected areisolated or disconnected. All low-pressure filling lines and other items notsubject to the test pressure should be disconnected or isolated.HDPE WATER/SEWER PIPING SYSTEM TECHNICAL & INSTALLATION GUIDE19
4.7 Relieving Air from PipelineAIR SHOULD BE VENTED FROM ALL HIGH SPOTS IN THE PIPELINE BE-FORE MAKING EITHER PRESSURE OR LEAKAGE TESTS. AUTOMATICAIR RELEASE VALVES ARE RECOMMENDED. Compressed entrapped aircauses difficulty in pumping to required pressure for strength tests. Furthermore,a pipeline may leak compressed air when it is actually water tight, andif this occurs during a leakage test it will cause erroneous results.4.8 Hydrostatic testingHYDROSTATIC PRESSURE TESTING IS PREFERRED AND IS STRONGLYRECOMMENDED. The preferred testing medium is clean water. The test sectionshould be completely filled with the test medium, taking care to bleed offany trapped air. Venting at high points may be required to purge air pocketswhile the test section is filling. Venting may be provided by loosening flanges,or by using equipment vents. Re-tighten any loosened flanges before applyingtest pressure.4.9 Pneumatic TestingWARNING: Pressure compressed air or any pressurized gas used as a testmedium may present severe hazards to personnel in the vicinity of lines beingtested. Extra personnel protection precautions should be observed whena gas under pressure is used as the test medium.WARNING: Explosive Failure. Piping system rupture during pneumatic pressuretesting may result in the explosive, uncontrolled movement of systempiping, components, or parts of components. Keep personnel a safe distanceaway from the test section during testing.Pneumatic testing should not be used unless the owner and the responsibleproject engineer specify pneumatic testing or approve its use as analternative to hydrostatic testing. Pneumatic testing (testing with a gas underpressure) should not be considered unless one of the following conditionsexists:20 HDPE WATER/SEWER PIPING SYSTEM TECHNICAL & INSTALLATION GUIDE
Page 1 and 2: HIGH-DENSITyPOLYETHYLENEWATER/sewer
Page 8 and 9: Publications by the American Societ
Page 10 and 11: or together with internal pressure
Page 12 and 13: 3.2.1 Unloading Site RequirementsTh
Page 14 and 15: 3.4 DraggingOccasionally, when long
Page 16 and 17: 3.9 Pipe Placement in TrenchesJM Ea
Page 18 and 19: 4.0 TESTING4.1 Leak TestingThe inte
Page 22 and 23: • The piping system is so designe
Page 24 and 25: ENGINEER.5.1 Damage AssessmentDamag
Page 26 and 27: 5.2 Heating Tool MaintenanceClean h
Page 28 and 29: Table 3Pipe SizeSocket Fusion Time
Page 30 and 31: 6.2 Butt Fusion: Reference PPI’s
Page 32 and 33: perature-measuring device should be
Page 34 and 35: Visually mitered (angled, off-set)
Page 36 and 37: Heat Soak Force—The force (pounds
Page 38 and 39: surized or non-pressurized main.6.2
Page 40 and 41: Figure DCorrectly Made Socket Fusio
Page 42 and 43: Caution: To assure flow control, ye
Page 44 and 45: Notes:
Page 47: Revised March 2011JME-11B© J-M Man

Polyethylene Water/Sewer - JM Eagle

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