Mechanical peeling nzira ye3PE anti-corrosion coating
Parizvino, mukugadzirisa gasi pombi yekugadzirisa, nzira yekupenengura ye3PE anti-corrosion coating inokurudzirwa zvichienderana nekuongororwa kwechimiro uye nzira yekuputira ye3PE anti-corrosion coating [3-4]. Pfungwa yekutanga yekubvisa iyo 3PE anti-corrosion coating yepombi yesimbi kugadzira mamiriro ekunze (senge tembiricha yekupisa), kuparadza kunamatira kwezvakaumbwa zvimiro zve3PE anti-corrosion coating, uye kuzadzisa chinangwa. yekusvuura pombi yesimbi.
Mukugadzirisa kwe3PE anti-corrosion coating, pombi yesimbi inoda kupiswa kusvika pamusoro pe200 ℃. Zvisinei, kana kutonhora kwakanyanyisa, matambudziko anotevera achaitika: kuporesa maitiro epoxy powder yakakurumidza, poda haina kunyunguduka zvakakwana, uye kuumbwa kwefirimu kwakashata, izvo zvinoderedza kukwanisa kwekubatanidza nepamusoro pe. pombi yesimbi; isati yakanamatira yakaputirwa, iyo epoxy resin inoshanda boka inopedzwa zvakanyanya. , zvishoma kana kunyange zvachose kurasikirwa nemakemikari ekubatanidza kukwanisa neadhesive; iyo sintered epoxy poda layer inogona kunge yakabikwa zvishoma, ichiratidza seyakasvibira uye yero, zvichikonzera kukwenenzverwa kwekuputira peeling kuongororwa. Naizvozvo, kana tembiricha yekunze yakakwira kupfuura 200 ℃, iyo 3PE anti-corrosion coating iri nyore kupepeta.
Mushure mekunge pombi yegesi yavigwa, pombi yakavigwa inoda kutemwa uye kugadziriswa nekuda kwezvinodiwa zveinjiniya yemanisipala; kana kana gasi rinobuda richida kugadziriswa, anti-corrosion layer inofanira kutanga yapepetwa, uyezve mamwe mabasa epombi anogona kuitwa. Parizvino, nzira yekubvisa ye3PE anti-corrosion coating yemapombi esimbi ndeye: kugadzirira kuvaka, pombi pretreatment, kupisa kupisa, kubvisa 3PE anti-corrosion coating, uye rimwe basa rekuvaka.

① Kugadzirira kwekuvaka
Kugadzirira kwekuvaka kunonyanya kusanganisira: vashandi vekuvaka uye zvivakwa zviripo, kugadziriswa kwechimbichimbi kwepombi, kurapwa kwedepressurization, kucherwa kwegomba rekushanda, nezvimwe. Midziyo yekuvaka yekubvisa 3PE anti-corrosion coating inonyanya kusanganisira pfuti yeacetylene yekucheka gasi, foshoro yakatsetseka kana sando yeruoko. .
② Pipeline pretreatment
Pipeline pretreatment inonyanya kusanganisira: kusarudza dhayamita yepombi, kuchenesa kunze kwepombi, nezvimwe.
③ Kurapa kwekupisa
Shandisa acetylene gasi torch kupisa pombi yakafarirwa patembiricha yakakwira. Tembiricha yemoto yekucheka gasi inogona kusvika 3000 ℃, uye iyo 3PE anti-corrosion coating yakaiswa papombi yegesi inogona kunyungudutswa pamusoro pe200 ℃. Kusungirirwa kwejasi kunoparadzwa.
④ Peeling ye3PE anti-corrosion coating
Sezvo kusungirirwa kwejasi rinopisa-kupisa kwakaparadzwa, chigadzirwa chemagetsi chakadai sefurati spatula kana nyundo yemaoko inogona kushandiswa kusvuura jira kubva pombi.

⑤ Rimwe basa rekuvaka

Mushure mekubvisa iyo 3PE anti-corrosion coating, kucheka uye kugadziridzwa kwepombi, welding uye kupfekedzwa kweiyo anti-corrosion coating kunofanirwa kuitwa.
Iyo parizvino inoshandiswa mechanical manual peeling nzira inononoka uye peeling maitiro ari pakati. Nekuda kwekukanganisa kwemidziyo yekuvaka, iyo yekubvisa basa inobudirira haina kukwirira, iyo inokanganisa zvakananga kugadzirisa kwekukurumidzira kwepombi yegesi. Izvo zvisingakwanisi zvemichina yekuvaka zvinonyanya kuratidzwa mu: a. Kudzivirirwa kwenzvimbo yemoto yekupfapfaidza yepfuti yekucheka gasi inotungamira kune diki nzvimbo yejasi yakanyungudutswa negasi rekucheka kupisa kupisa; b. Kuganhurirwa kwekukwana pakati pezvishandiso zvakaita sefoshoro dzakafuratira kana sando dzemaoko uye nekunze kwepombi yepombi Inotungamira kune yakaderera coating peeling kunyatsoshanda.
Kuburikidza nehuwandu hwenzvimbo yekuvaka, nguva yekupenengura ye3PE anti-corrosion coating pasi pemadhayamita epombi akasiyana uye saizi yechikamu chinopepetwa chakawanikwa.