Polyethylene Water/Sewer - JM Eagle

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