Yog vim li cas rau kev vuam tsis zoo ntawm PE cov kav dej kav dej: Qhov zoo ntawm cov kav dej tsis zoo. Txhawm rau txo cov nqi, ntau lub tuam txhab siv cov khoom siv rov ua dua lossis cov txheej txheem tsim khoom, uas ua rau tsis tsim nyog thiab nyuaj rau vuam; Txawm hais tias nws yog tib hom ntawm PE cov khoom siv dej welded kav, vim yog cov khoom sib txawv Cov khoom siv raw thiab cov txheej txheem ntawm cov kav dej sib txawv, thiab cov fusion crystalline molecules tsis yooj yim los ua ke, ua rau cov vuam tsis zoo. PE fais fab yeeb nkab txais PE (hloov polyethylene) rau kub dipping los yog epoxy resin rau sab hauv thiab txheej txheej, uas muaj corrosion kuj zoo heev. Nyob rau tib lub sijhawm, txheej txheej nws tus kheej kuj muaj hluav taws xob zoo thiab yuav tsis ua rau galvanic corrosion. Kev nqus dej tsawg, muaj zog txhua yam thiab kev sib txhuam me me, uas tuaj yeem ua tiav lub hom phiaj ntawm kev siv mus ntev. Nws tseem tuaj yeem ua rau cov cag ntoo thiab av ib puag ncig kev ntxhov siab; seb qhov vuam kub ua tau raws li qhov yuav tsum tau ua, txawm tias qhov ntsuas kub tau hloov kho vim qhov hloov pauv raws caij nyoog, seb qhov kub ntawm lub vuam tshuab ua tau raws li tus qauv, thiab qhov kub thiab txias yog qhov tseem ceeb cuam tshuam rau qhov vuam ruaj khov ntawm PE cov kav dej. PE cov yeeb nkab dej yog siv dav hauv kev tsim cov yeeb nkab dej vim nws lub zog siab, tiv thaiv corrosion, thiab lwm yam ntxwv. Vim tias nws yuav tsis xeb, nws yog cov khoom siv yeeb nkab zoo tshaj plaws los hloov cov kav dej zoo tib yam hlau. Nws yog tsuas yog siv nyob rau hauv kev ua liaj ua teb dej hauv nroog, kev siv roj hauv nroog thiab kev ua liaj ua teb dej; PE cov yeeb nkab dej yog nyem los ntawm cov quab yuam sab nraud thaum lub sij hawm vuam, uas ua rau cov yeeb nkab xa dej tawm ntawm lub voj voog, tsis tuaj yeem ua kom nruj, thiab tsis yooj yim rau kev soj ntsuam nrog lub qhov muag liab qab, ua rau lub vuam tsis muaj zog; PE dej mov Seb qhov vuam ntawm cov kav dej khov kho puas muaj feem xyuam rau ntau yam. Cov khoom siv ntawm cov kav dej xa dej, seb cov xeb puas raug tshem tawm ua ntej vuam, seb cov khoom siv vuam puas yog, siv txoj kev vuam zoo li cas, argon arc vuam, tuav vuam, roj vuam lossis oxygen vuam yog qhov tseem ceeb uas ua rau vuam tsis zoo.
