Iimveliso
I-Anticorrosion yePipeline yePetroleum
Inkcazo
DN50-DN1420mm
I-3LPE: i-polyethylene enemigangatho emithathu
I-2LPE: i-polyethylene ephindwe kabini
I-FBE: i-epoxy powder yomgca omnye
I-2FBE: umgubo ophindwe kabini we-epoxy
Ukutyeba kwe-Anticorrosive Coating ye-3LPE
| DNIdayamitha yeNominal | Epoxy Coating(μm) | I-Adhesive Coating(μm) | Ukutyeba okupheleleyo koMaleko (mm) | |
| (mm) | eqhelekileyo(n) | Ibethelelwe(v) | ||
| DN≤100 | ≥120 | ≥170 | 1.8 | 2.5 |
| 100 | 2.0 | 2.7 | ||
| 250 | 2.2 | 2.9 | ||
| 500≤DN<800 | 2.5 | 3.2 | ||
| DN≥800 | 3.0 | 3.7 | ||
Imibhobho yemibhobho ye-oyile ngokuqhelekileyo iityhubhu zentsimbi, ezidityaniswe nge-welding kunye neeflanges kunye nezinye izixhobo zokudibanisa ezinemibhobho yomgama omde, kunye neevalvu zisetyenziselwa ukuvula nokuvala ulawulo kunye nokulawulwa kokuhamba.Umbhobho we-oyile ubukhulu becala unothutho lwe-isothermal, uthutho lokufudumeza kunye nothutho olulandelelanayo kunye nobunye ubuchwepheshe bezothutho.Ukonakala kwemibhobho kunye nendlela yokuthintela umhlwa yenye yekhonkco elibalulekileyo lokugcinwa kwemibhobho.Ngenxa yokuba i-oyile yayinesalfure neasidi, kunye nombhobho ovezwe emoyeni nayimvula, lo mbhobho kulula ukugrunjwa.I-pipeline corrosion inezi ntlobo zilandelayo: i-steel oxygen corrosion ebangelwa ngumgaqo we-galvanic cell;Ukonakala kwe-Hydrogen evolution ngenxa yemvula eneasidi ebangelwa ziisulfides ezineasidi ngokugqithisileyo (i-sulfur dioxide nehydrogen sulfide) kumphezulu wemibhobho;Ikharbhon diokside ye-asidi umhlwa obangelwa yimvula ye-atmospheric;Ukonakala kwebhaktheriya okubangelwa ziibhaktheriya ezinokusebenzisa i-sulfate kumphezulu wombhobho kunye nomhlwa obangelwa ngamanzi asembhobho.
Umbhobho osetyenziselwa imibhobho yeoyile ubukhulu becala ngumbhobho wentsimbi yekhabhoni, enokwahlulwa ibe ngumbhobho wentsimbi ongenamthungo kunye nombhobho wentsimbi odityanisiweyo ngokwenkqubo yawo yokuvelisa.Umbhobho wentsimbi ongenamthungo uneempawu zamandla aphezulu, iinkcukacha ezininzi, ngoko ke ifanelekile kwimveliso yeoli eyonakalisayo okanye iimeko zobushushu obuphezulu.Umbhobho wentsimbi ongenamthungo wahlulwe waba zintlobo ezimbini ezishushu esongwayo nezibandayo.Ngenxa yokuba inkqubo yokudweba ebandayo iya kubangela ukuqina kwezinto eziphathekayo, kuyafuneka kwakhona ukwenza unyango oluhambelana nokushisa ngokuhambelana nokusetyenziswa okuthe ngqo kombhobho.Umbhobho wentsimbi odityanisiweyo unokwahlulwa ube ziindidi ezimbini: umbhobho wentsimbi yomthungo kunye nombhobho odityanisiweyo owisiweyo.Ngenxa yeempawu zenkqubo yombhobho wentsimbi ye-carbon, olu hlobo lombhobho wentsimbi kulula ukuba lube brittle kwiqondo lobushushu eliphantsi, ngoko ke ubukhulu becala lufanelekile kumbhobho wobushushu obuqhelekileyo, ubushushu bokusetyenziswa kombhobho akufuneki budlule i-300 degrees Celsius, ngokuthetha ngokubanzi, ubushushu bokusetyenziswa kombhobho oqhelekileyo we-carbon steel uphakathi kwe-0 kunye ne-300 degrees Celsius.Ukuba ukusetyenziswa komgangatho ophezulu we-carbon steel pipe, uluhlu lobushushu kunye nokuphumla kwe-40 ukuya kuma-450 degrees Celsius.
