I-Anti-Corrosive Polyethylene Coating ye-3PE Pipeline

Ingubo yepolyethylene echasene nokubola ngokubanzi yingubo yepolyethylene enezakhiwo ezintathu, efinyezwa njenge-3PE. Umaleko ongezantsi uhlala uyingubo ye-epoxy powder, umaleko ophakathi yi-glue, kwaye umaleko ongaphandle yingubo ye-polyethylene.

Ulwakhiwo lwe-Anticorrosive Coating

Ulwakhiwo olunemigangatho emithathu i-polyethylene anticorrosive coating ifinyezwa njenge-3PE. Umaleko ongezantsi yi-epoxy powder coating, umaleko ophakathi uyancamathela, kwaye umaleko wangaphandle yi-polyethylene.

ukwenza

Umaleko wokuqala we-3PE yi-epoxy coating, umaleko wesibini unamathele, kwaye umaleko wesithathu yi-polyethylene ekhutshiweyo. Iingqimba ziboshwe ngokuqinileyo omnye komnye ukuze zenze isakhiwo esidibeneyo, sincedisana amandla omnye nomnye. Isebenzisa amandla okudibanisa okuqinileyo phakathi kwe-epoxy powder kunye nomphezulu wombhobho wentsimbi ukuphucula ukunamathela; kwaye isebenzisa amandla omatshini abalaseleyo, ukuzinza kweekhemikhali, ukugquma, ukuxhathisa ukungena kweengcambu zezityalo, kunye nokuxhathisa kwamanzi e-polyethylene ekhutshiweyo ukuphucula ukusebenza kwayo ngokubanzi. Oku kwenza ukuba ukusebenza ngokubanzi komgangatho wesithathu we-PE anticorrosive coating ibonakale ngakumbi kwaye ibanzi, ilungele imeko engqongileyo eneemfuno eziphezulu zepropathi yomatshini, ukumelana noxinzelelo lomhlaba, kunye nokumelana namanzi komgangatho wokugquma, njengomhlaba wegrabile, amacandelo amatye, iindawo. ezinobumanzi obuphezulu bomhlaba, kunye neendawo ezineengcambu zezityalo eziphuhlileyo.

isicelo

Ngaphambi kokufaka i-anticorrosive coating, umphezulu wombhobho wentsimbi kufuneka ucocwe ngamafutha, ukungcola, kunye nezinye iziqhotyoshelo, kwaye umphezulu kufuneka ulungiswe kwangaphambili emva kokushisa umbhobho wentsimbi kwiqondo lokushisa lama-40-60 ℃. Umgangatho wokulungiswa komphezulu kufuneka uhlangabezane neemfuno zenqanaba le-Sa2.5 le-"Surface Rust Grade and Rust Removal Grade of Steel Before Painting" GB/T 8923, kunye nobunzulu bepateni ye-anchor kufuneka bufikelele kwi-50μm-75μm. I-weld slag, i-burrs, kunye nezinye izinto ezingcolileyo kumphezulu wombhobho wensimbi kufuneka zisuswe.

Sebenzisa umthombo wobushushu obungangcoliswanga ukufudumeza umbhobho wentsimbi kwiqondo lobushushu obufanelekileyo bokwambathisa, kwaye usebenzise ngokulinganayo i-epoxy powder coating kumphezulu wombhobho wentsimbi. I-adhesive kufuneka isetyenziswe ngexesha lenkqubo yokunyanga i-epoxy powder. Uluhlu lwe-polyethylene lunokuthi lufakwe ngokusebenzisa inkqubo ye-longitudinal extrusion okanye inkqubo yokugoqa esecaleni. Kwimibhobho yensimbi ene-diameter ye-nominal engaphezu kwe-500mm, inkqubo yokugoqa ngasecaleni iyacetyiswa. Xa usebenzisa inkqubo yokusonga esecaleni, qinisekisa ukuba i-polyethylene kumacala omabini okudlulayo kunye ne-polyethylene kumacala omabini e-weld iqengqeleke ngokupheleleyo kwaye ixinzelelwe, kwaye ithintele umphezulu wokugquma we-polyethylene ekubeni utyunyuzwe. Xa usebenzisa inkqubo ye-longitudinal extrusion, akufanele kubekho i-voids kumacala omabini e-weld. Emva kokuba umaleko we-polyethylene ugqunywe, qinisekisa ukuba i-epoxy edityanisiweyo yokwambathisa iphiliswe ngokupheleleyo, kwaye emva koko uyipholise ngamanzi kwiqondo lobushushu lombhobho wentsimbi elingekho ngaphezulu kwe-60℃.

Lungisa

Xa iziphene zifunyenwe kumbhobho we-3PE, ngenxa yomonakalo ongaphantsi okanye olingana ne-30mm, kuyacetyiswa ukuba kusetyenziswe iipatches zokulungisa i-polyethylene ye-radiation cross-linked. Xa ulungisa, susa kuqala ukungcola kwindawo eyonakalisiweyo kwaye uhlahlele i-polyethylene layer. Emva koko usike uluhlu lwe-polyethylene kwindawo eyonakalisiweyo kwisangqa, kwaye umgca kufuneka uguqulwe ube yi-angle enqabileyo. Gcwalisa umngxuma nge-adhesive ehambelana ne-patch yokulungisa, uze unamathele i-patch yokulungisa. Ubungakanani bepatch yokulungisa kufuneka buqinisekise ukuba umphetho ubuncinci be-100mm kude nomda womngxuma kwi-polyethylene layer. Xa unamathele i-patch, yitshise ngelixa uyiqengqeleka nge-roller okanye uyicinezele ngeeglavu ezikwazi ukumelana nobushushu ukuze ususe umoya de i-adhesive ejikeleze i-patch yokulungisa iphuphuma ngokulinganayo.

Ngomonakalo ongaphezu kwe-30mm, susa kuqala ukungcola kwindawo eyonakeleyo, uhlambulule i-polyethylene layer, kwaye usike umaleko we-polyethylene kwindawo eyonakeleyo kwisangqa, kwaye umgca kufuneka uguqulwe ube yi-angle engabonakaliyo. Gcwalisa umngxuma nge-adhesive ehambelana ne-patch yokulungisa, uze unamathele i-patch yokulungisa. Ekugqibeleni, bhinqa i-tape yokushisa ukushisa kwindawo yokulungisa, kwaye ububanzi bokugubungela kufuneka bube ubuncinane be-50mm enkulu kunecala ngalinye lendawo yokulungisa.

Kungenjalo, umphezulu unokucocwa kuqala, kwaye emva koko ulwelo olunamacandelo amabini epoxy coating lungasetyenziselwa i-anticorrosion. Ubunzima befilimu eyomileyo kufuneka bufane nobombhobho oyintloko, kwaye ke i-patch yokulungisa okanye i-tape yokunciphisa ukushisa ingafakwa.

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