General Suitability nyob ntawm ib puag ncig
Brass yeeb nkab fittingstuaj yeem siv sab nraum zoov thiab hauv av, tab sis lawv tsis haum rau txhua yam kev mob. Lawv qhov kev ua tau zoo nyob ntawm qhov chaw tshwj xeeb. Brass yog ib qho alloy ntawm tooj liab thiab zinc, thiab qee yam tshuaj lom neeg tuaj yeem ua rau nws corrode. Hauv cov av txhoj puab heev, xws li cov uas muaj chloride siab lossis cov dej noo, tooj dag yog qhov tsis zoo rau corrosion.
Sab nraum zoov raug thiab huab cua Factors
Kev siv sab nraum zoov nthuav tawm fittings los nag, kub viav vias, thiab UV hluav taws xob. Brass muaj zoo ntuj tiv taus huab cua tab sis tsis tiv thaiv kab mob. Cov khoom lag luam tshwj xeeb sau tseg tias sab nraum zoov tuaj yeem txo qhov kev ua neej ntawm cov khoom siv tooj dag los ntawm 30-40% piv rau kev teeb tsa hauv tsev. Cov cua txias txias thiab UV hluav taws xob tsis muaj tshuaj lom neeg ua rau tooj dag zoo li lawv ua cov yas, tab sis lub cev kev ntxhov siab los ntawm cov dej khov nthuav tawm tseem muaj kev pheej hmoo.
Underground Av Chemistry yog qhov kev sib tw tseem ceeb
Brass yeeb nkab fittingsfaus rau hauv av ntsib ib puag ncig hnyav dua li cov huab cua. Av muaj noo noo, oxygen, thiab ntau yam ntsev yaj. Ib txoj kev tshawb fawb pom tau hais tias qhov corrosion ntawm tooj dag nyob rau hauv cov av xuab zeb nce ntxiv raws li cov ntsiab lus noo noo nce mus txog qhov txwv tsis pub tshaj 30%, tom qab ntawd tus nqi txo. Qhov no txhais tau hais tias "nqhis tab sis tsis saturated" av yog feem ntau corrosive mob.
Kev pheej hmoo ntawm chlorides thiab Aggressive av
Chloride ions tshwj xeeb yog txhoj puab heev rau tooj dag. Tib txoj kev tshawb fawb tau tshawb xyuas cov av nrog ntxiv chlorides thiab paub tseeb tias qhov no ua rau muaj kev txhim kho corrosion. Yog li ntawd,tooj dag fittingsntsia rau hauv cov ntug dej hiav txwv nrog ntsev tsuag los yog hauv av uas muaj kab mob nrog txoj kev ntsev los yog chiv muaj kev pheej hmoo siab dua. Nyob rau hauv cov xwm txheej nruj heev, koj yuav tsum siv kev tiv thaiv ntxiv.
Kev daws teeb meem tseem ceeb: Kev Tiv Thaiv Wrapping rau faus
Tus txheej txheem kev lag luam xyaum rau faus tooj dag fittings yog qhwv lawv. Cov tuam txhab lag luam tseem ceeb tshaj tawm tias lawv qhov kev thawb - mus rau - txuastooj dag fittingstsuas yog pom zoo rau kev siv hauv av thaum qhwv nrog daim kab xev silicone zoo. Cov kab xev no muab kev tiv thaiv impervious ntawm cov tooj dag fitting thiab tej yam corrosive av kab mob, uas tiv thaiv cov hlau thiab tswj cov khoom warranty.
Txoj kev thov Silicone daim kab xev kom raug
Txhawm rau tiv thaiv kom haum, siv tus kheej -fusing silicone daim kab xev nrog qhov tsawg kawg nkaus thickness ntawm 0.020 ntiv tes. Rub daim kab xev kom nruj thiab ncab nws thaum koj qhwv, kom ntseeg tau tias nws khi rau nws tus kheej. Pib tsawg kawg ib nti rau hauv cov yeeb nkab, txuas ntxiv mus rau tag nrho lub cev haum, thiab xaus ib nti mus rau cov yeeb nkab ntawm sab nraud. Cov ntaub nplaum tag nrho cements nyob rau hauv ob peb teev, tsim kom muaj kev ruaj ntseg, tiv thaiv cov av ib puag ncig.
Backfilling nrog huv xuab zeb yog qhov tseem ceeb
Cov ntaub ntawv koj rov qab nrog tsuas yog ib qho tseem ceeb raws li lub wrapping. Cov pob zeb ntse, pob zeb, lossis cov khib nyiab tuaj yeem ua rau cov ntaub nplaum silicone lossis ua rau lub cev puas tsuaj rau cov tooj dag haum los ntawm kev puas tsuaj lossis cuam tshuam. Qhov zoo tshaj plaws kev xyaum yog pw lub qhwv haum nyob rau hauv huv si, compacted xuab zeb ua ntej backfilling nrog haiv neeg av.
Txhua yam -Brass vs. Multi-Material Fittings
Yog kojtooj dag fittingssuav nrog lwm cov ntaub ntawv, koj yuav tsum tiv thaiv lawv raws li. Ib lub chaw tsim khoom sau tseg tias txawm tias lawv cov khoom siv polymer- lub cev fittings yuav tsum tau qhwv yog tias lawv muaj cov khoom siv tooj dag. Qhov yooj yim yog rau cov hlau qhov chaw. Ib qho haum nrog lub nplhaib tooj dag sab hauv xav tau kev tiv thaiv tib yam li txhua yam - tooj dag lub cev.
Sab hauv tsev vs. Sab nraum zoov saum toj no -Kev siv av
Rau saum toj no - siv sab nraum zoov hauv av, kev tiv thaiv qhwv feem ntau tsis tas yuav tsum tau, vim qhov kev pheej hmoo tseem ceeb yog los ntawm kev sib cuag nrog av. Txawm li cas los xij, koj tseem yuav tsum paub txog ib puag ncig. Lub ntug hiav txwv ntsev cua tuaj yeem ua kom nrawm nrawm ntawm qhov chaw corrosion. Hauv cov cheeb tsam zoo li no, xaiv cov khoom siv tooj dag nrog cov npib tsib xee lossis chrome plating lossis siv cov txheej tiv thaiv tuaj yeem ua rau lawv lub neej kev pab.
Lub luag haujlwm ntawm Alloy Composition
Tsis yog txhua tus tooj dag yog tib yam. Qhov tshwj xeeb alloy muaj pes tsawg leeg cuam tshuam rau corrosion kuj. Kev tshawb fawb tshawb fawb pom tau tias muaj cov ntsiab lus xws li arsenic, npib tsib xee, thiab hlau cuam tshuam rau tus nqi corrosion. Rau cov ntaub ntawv tseem ceeb sab nraum zoov lossis hauv av, koj yuav tsum qhia kom meej dezincification- resistant (DZR) tooj dag, uas yog tsim los ua kom muaj zog ntau dua rau cov dej thiab av.
Kev ntsuas kub thiab ntsuas kub tseem siv tau
Lub cev muaj zog ntawmtooj dag fittingstsis yog txo qis los ntawm kev txhim kho hauv av kom zoo. Cov tooj dag raug siv rau sab nraum zoov tuaj yeem tswj tau ntau qhov kub thiab txias, feem ntau ntawm -20℃txog 120 degree, thiab tuav lub siab ua haujlwm siab, feem ntau mus txog 1450 PSI, nyob ntawm cov khoom tshwj xeeb. Cov kev ntsuas no ua kom lub cev ua haujlwm kom raug txawm tias faus.
Koj Daim Ntawv Teev Npe Ua Haujlwm rau Kev Txhim Kho Txhim Kho
Txhawm rau ua kom lub sijhawm ntev - txhim kho, ua raws li kev lag luam no - tus qauv raws tu qauv. Rau kev faus hauv av: 1) Siv DZR tooj dag fittings los yog siab - tooj dag zoo nrog cov pov thawj corrosion tsis kam. 2) Tom qab ua qhov kev sib txuas, qhwv tag nrho cov haum thiab 1 nti ntawm cov yeeb nkab ntawm txhua sab nrog tus kheej -fusing silicone daim kab xev, ncab nws nruj. 3) Lub txaj qhwv rov qab rau hauv cov xuab zeb huv si. Rau saum toj no- siv sab nraum zoov hauv av: 1) Xaiv qhov corrosion{12}} tiv taus tooj dag lossis plated haum. 2) Hauv cov chaw ntug hiav txwv lossis thaj chaw muaj kev lag luam, xav txog kev siv cov txheej tiv thaiv ntxiv. 3) Ua qhov kev tshuaj xyuas ib ntus rau txhua qhov cim ntawm pitting lossis corrosion. Thaum koj xaiv cov ntaub ntawv raug thiab ua raws li cov txheej txheem kev teeb tsa no,tooj dag fittingsmuab kev pabcuam ruaj khov thiab txhim khu kev qha nyob rau hauv ob qho tib si sab nraum zoov thiab hauv av daim ntaub ntawv rau xyoo lawm.
