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slowwaterfilling.doc

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slowwaterfilling,watershouldbethetubeaftertheairallrows. Afterall,3)airwillcheckvalveclosed,slowpressurized,firstchecktoworkpressure,furthertotestpressureobservation,thenfelltoworkpressuremeterreading,accordwithastandardqualitystandardsforqualified. 4)intheprocessofthebooster,ifdiscoverthespringpressuregaugemeterhandswinging,instabilityandslowboostergasisnotline,shouldbetotheexhaustpressureriseagainafter. 5)intheprocessofpressuretesting,allcheckifdiscoverinterfaceleakage,shouldmakeaobviousmark,afterwaitingforpressuredroptozero,repairmeasurestocomprehensiverepair,testagain,untilqualified. 6)afterthetest,towash,rinseafterqualified,shouldimmediatelyacceptanceformalities,backfill. 7)thenewoutdoorwatersupplypipebeforetheindoorpipelineconnection,shouldbeinindoorandoutdoorfullflushofqualifiedrearcanbeconnected. 8)washingstandardwhendesignhasnorules,withexportwaterandtransparencyinlinewithwaterattheentranceofvisualforqualified. 9)drinkingwaterpipebeforeusedisinfectionwitheverylitresofwatercontaining20-30mgoffreechlorinedisinfectionafterfilling.Chlorinewatershouldstandfor24hormoreinthepipeline,thenrinsewithwaterafterdisinfection.Commonlyuseddisinfectantsforbleachingpowder,disinfectiontreatment,putthebleachintothebucket,addwater,stirtodissolvewithwaterfillingpipejoinsection,24haftersoaking,waterrinse. 2.2.3qualitystandards 2.2.3.1generalprovisions 1,deliveryofthedrinkingwaterpipeplasticpipe,pipe,galvanizedsteelpipeshouldbeadoptedorwatersupplycastironpipe.Orwatersupplypipesofcastironpipe,plasticpipe,thepipeshouldbethesamemanufacturerssupportingproducts. 2,outdooroverheadlayingplasticpipeshallnotbe,mustbeappropriatelywhentheoutdooroverheadlayingheatpreservationmeasuresandpreventbaskin. 2.2.3.2masterproject 1,whenburiedwatersupplypipeline,shouldbeunderlocalfrostline,suchasmustbeabovethefreezinglinelaying,shouldhaveareliableinsulationmoisture-proofmeasures.Ifnofrozenregions,buried,turnsthesoilburieddepthonthetopofthetubeshallnotbelessthan500mm,theburialdepthofthecrosstheroadareas