Yog tias koj faus cov pa roj carbon steel hauv cov av ntub dej, av thiab av chemistry yuav pib pitting cov hlau yuav luag tam sim ntawd. Apipeline txheej systemtsis yog ib txheej xim xwb- nws yog ib qho khoom siv tshuaj lom neeg thiab cov khoom siv hluav taws xob tsim los ua kom cov hlau liab qab nyob ib puag ncig corrosive rau 30 txog 50 xyoo.
Hom Pipeline Txheej Txheej
Cov av sib txawv thiab kab kub hu rau cov txheej txheem sib txawv kiag li:
Fusion-Bonded Epoxy (FBE):Siv raws li ib tug qhuav hmoov rau preheated hlau. Lub tshav kub melts cov hmoov, ua ib tug nruj chemical bond nrog hlau. FBE muaj cov adhesion siab thiab tshuaj tiv thaiv, ua rau nws zoo tagnrho raws li ib tug standalone txheej nyob rau hauv cov av du los yog ib tug primer nyob rau hauv multi- txheej.
Peb- Txheej Polyethylene (3LPE):Tus qauv spec rau cov av txhoj puab heev. Cov txheej txheem no muab cov txheej txheem FBE primer, cov nplaum polymer, thiab lub tsho tuab HDPE sab nraud. Sab hauv epoxy nres corrosion, thaum lub hnab yas sab nrauv absorbs lub cev cuam tshuam los ntawm cov pob zeb backfill thiab hauv av txav.
Epoxy thiab Polyurethane kua:Siv los ntawm tshuaj tsuag los yog txhuam. Cov no yog siv feem ntau rau kev kho vaj tse, li qub, thiab kev cai fittings qhov twg automated Hoobkas txheej rollers tsis tuaj yeem ua haujlwm.
Factory Application Standards
Thov apipeline txheej systemnyob rau hauv ib lub Hoobkas yuav tsum nruj txheej txheem tswj. Ib qho yuam kev ntawm kab ua rau kev ua tsis tiav thaum ntxov:
Surface Blast Profile:Steel nto yuav tsum tau txhaj koob tshuaj tivthaiv blasting rau strip oxidation scale thiab tsim ib tug ntse thauj tog rau nkoj qauv. Yog hais tias cov hlau profile yog ntiav dhau, thermal expansion yuav ua rau cov txheej txheem tev tawm lub sijhawm.
Kev tswj qhov kub thiab txias:Hlau yuav tsum yog induction-rhuab mus rau lub hom phiaj meej ua ntej thov hmoov. Tsis txaus cua sov tiv thaiv kom tiav cov tshuaj tua kab mob, thaum overheating degrades cov resin matrix ua ntej nws bonds.
High-Voltage Spark Testing:Cov kav dej tiav lawm dhau los ntawm qhov ntsuas hnub so inline ua ntej tawm hauv vaj. Yog tias muaj qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khawm
Tiv thaiv Field Welds
Factory coatings yeej ib txwm teem rov qab ob peb ntiv tes los ntawm cov yeeb nkab kawg kom cov neeg ua haujlwm tuaj yeem txuas cov pob qij txha ua ke hauv qhov trench. Cov hlau liab qab no sawv cev rau qhov kev pheej hmoo corrosion siab tshaj plaws thoob plaws tag nrho cov kav dej.
Thaum daim teb welds hla tsis tau - kev sim ua kom puas tsuaj, cov pab pawg txhim kho qhwv thaj chaw raug tshav kub- lub tes tsho shrinkable lossis cov khoom siv kho cov kua epoxy. Yog tias cov neeg ua haujlwm tsis tuaj yeem ntxuav lub vuam seam kom zoo los yog overheats lub tes tsho thaum lub sij hawm shrinking, cov dej hauv av tuaj yeem nkag mus rau hauv qab ntug, ua rau cathodic disbondment thiab corroding lub sij hawm.