Cov kav dej tiav lawm yog tawm tom qab dej txias, tab sis tom qab tag nrho, tom qab cov cua kub kub, qhov kub ntawm cov kauv steel yeeb nkab tseem siab heev tom qab dej txias, yog li cov ntsiab lus hauv qab no yuav tsum tau muab sau tseg tom qab cov kav dej kauv raug muab tshem tawm. lub caij ntuj sov:

Ib qho: Nyob rau hauv cov txheej txheem ntawm cov kauv steel yeeb nkab, cov epoxy hmoov thiab cov nplaum yuav tsum yog 1% loj dua li niaj zaus, thiaj li ua tiav cov thickness tiag tiag.

Thib ob: Tsis txhob raug kub hnyiab tom qab muab kauv steel yeeb nkab raug tshem tawm ntawm txoj kab.Kev kis tau yooj yim tuaj yeem ua rau kev nthuav dav ntawm PE txheej thiab yog li cov phab ntsa sab nrauv ntawm cov yeeb nkab steel, uas yuav tsis ua tiav cov nyhuv anti-corrosion.

Peb: Tsis txhob raug los nag tom qab lub kauv steel yeeb nkab raug tshem tawm ntawm txoj kab.Nws yog ib qho yooj yim ua rau dej seepage ntawm cov yeeb nkab sib txuas tom qab los nag.

Plaub: Tom qab muab kauv steel yeeb nkab raug tshem tawm ntawm txoj kab, nws yuav tsum muab tso rau hauv qhov chaw tiaj tus, thiab nws yuav tsum tau muab tso rau hauv tiaj tus.Txhob sib ceg.Yog tias hom extrusion tau muab tso rau tsawg kawg 24 teev, PE txheej yuav tsum tau txuas tag nrho rau sab nrauv ntawm cov yeeb nkab steel..

3PE anti-corrosion qauv:

Qib Ordinary ≥ 0.70 ib txheej ntawm primer + ib txheej txheej sab hauv + ib txheej ntawm txoj siv tawv

Reinforced qib ≥ 1.40 txheej ntawm primer + puab txheej (overlap yog 50 ~ 55% ntawm daim kab xev dav)

Ib txheej ntawm daim kab xev sab nrauv (kev sib tshooj yog 50 ~ 55% ntawm daim kab xev dav)

Nws yog tsuas yog siv rau cov roj thiab hluav taws xob kis tau tus mob;sab nrauv ntawm faus steel pipelines xws li cov khoom siv dej thiab cov kav dej thiab cov roj tsheb thauj mus los hauv cov tshuaj lom neeg thiab kev tsim kho hauv nroog yog los tiv thaiv corrosion, uas muaj cov yam ntxwv ntawm kev tsim kho yooj yim thiab tsis muaj kuab paug.Polyethylene PE anti-corrosion adhesive daim kab xev tau dav siv los ua cov khoom siv sab nrauv los tiv thaiv corrosion ntawm cov roj thiab roj cov kav dej txij li xyoo 1960.Nws tau siv rau ntau tshaj 40 xyoo.Vim nws cov kev ua tau zoo los tiv thaiv corrosion thiab kev tsim kho yooj yim, nws tau ua nws cov khoom siv los tiv thaiv corrosion rau cov kav dej.Lub kaw lus muaj ib txoj hauj lwm.Thiab txij li thaum cov polyethylene txheej daim kab xev ntau lawm cov tuam txhab txuas ntxiv txhim kho thiab txhim kho polyethylene PE ntau yam thiab zoo ntawm cov ntaub nplaum tiv thaiv corrosion, kom cov polyethylene PE daim ntaub ntawv anticorrosion nplaum daim kab xev nthuav dav.