Txheej txheem cej luam
Full Title:ISO 21809-2:2007 - Petroleum thiab natural gas industries - Cov txheej txheem sab nrauv rau faus lossis submerged pipelines siv hauv cov kav dej thauj mus los - Ntu 2: Fusion-bonded epoxy coatings
Hauv cov ntsiab lus yooj yim, tus qauv no qhia txog cov kev xav tau rauFusion-Tshuaj Epoxy (FBE)coatings, uas yog ib qho ntawm feem ntau siv thiab zoo txoj kev los tiv thaiv underground los yog underwater steel pipelines los ntawm corrosion.
Cov ntsiab lus tseem ceeb ntawm tus qauv
1. Scope:
Nws siv rau ib zaug - txheej FBE txheej thiab FBE-raws li ntau- txheej txheej txheej siv rau cov kav hlau rau kev faus lossis submerged. Nws npog:
Tshiab, seamless, thiab welded steel kav.
Daim ntawv thov txheej txheem, tshuaj xyuas, kuaj, tuav, thiab khaws cia cov kav dej coated.
Ob qho tib si cov khoom siv txheej (FBE hmoov) thiab tiav, coated yeeb nkab.
2. Lub hom phiaj ntawm txheej txheej:
Lub luag haujlwm tseem ceeb ntawm FBE txheej yog los ua ib qhodielectric barrier, hluav taws xob insulating cov yeeb nkab steel los ntawm cov av ib puag ncig los yog dej. Qhov no tiv thaiv electrochemical corrosion.
3. Cov Lus Qhia Tseem Ceeb thiab Cov Tsis Txaus:
Tus qauv yog cov ncauj lus kom ntxaws heev, tab sis ntawm no yog qhov tseem ceeb tshaj plaws uas nws npog:
Kev npaj nto:Ua ntej txheej, cov yeeb nkab steel yuav tsum tau ntxuav kom huv si thiab ua kom sov. Tus qauv qhia txog qhov yuav tsum tau ua kom huv huv (feem ntau Sa 2½) thiab thauj tog rau nkoj profile (roughness) ntawm steel nto.
Txheej Khoom (FBE Powder):Nws txhais cov khoom ntawm cov hmoov tsis zoo epoxy, suav nrog:
Gel Sijhawm
Particle Loj Distribution
Cov ntsiab lus noo noo
Cov ntsiab lus tsis haum
Cia ruaj khov
Daim ntawv thov txheej:Qhia meej txog cov txheej txheem rau cua sov cov yeeb nkab, thov cov hmoov electrostatically, thiab xyuas kom meej ib yam, tag nrho cov zaj duab xis kho.
Cov Khoom Txheej Txheem Ua tiav (Tests ntawm Coated Pipes):Qhov no yog lub hauv paus ntawm tus qauv. Nws tswj hwm ntau qhov kev ntsuam xyuas zoo, suav nrog:
Thickness:Yuav tsum nyob rau hauv ib qho kev teev tseg (piv txwv li, 350 - 650 μm yog qhov ntau).
Adhesion:Kuaj los ntawm cathodic disbondment (ua haujlwm rau tev tawm thaum raug hluav taws xob) thiab los ntawm kev siv tshuab.
Flexibility:Cov txheej yuav tsum tsis txhob tawg thaum cov yeeb nkab yog khoov mus rau ib txoj kab uas hla.
Impact Resistance:Lub txheej yuav tsum tiv taus ib qho kev cuam tshuam tsis muaj kev puas tsuaj.
Hardness:Ntsuas siv Barcol impressor.
Cathodic Disbondment:Kev ntsuas tseem ceeb uas simulates ntev - kev ua tau zoo nyob rau hauv kev tiv thaiv cathodic. Cov txheej yuav tsum tiv thaiv tev tawm ntawm lub hnub so (kev txhob txwm ua txhaum).
High Temperature Resistance:Rau cov kav dej uas yuav ua haujlwm ntawm qhov kub siab.
Kev sib piv nrog Lwm Cov Qauv Txheej Txheem
ISO 21809-2 yog tus qauv ntsuas thoob ntiaj teb. Nws yog kev sib haum xeeb nrog cov qauv hauv cheeb tsam, tab sis koj kuj yuav ntsib:
| Txuj | Thaj tsam | Title / Ua kom pom tseeb | Qhov tseem ceeb sib txawv / ceeb toom |
|---|---|---|---|
| ISO 21809-2: 2007 | Thoob ntiaj teb | Fusion-Tshuaj epoxy txheej | Tus qauv thoob ntiaj teb. Feem ntau tau txais los yog siv ncaj qha. |
| CSA Z245.20-18 | Canada | Cog-Applied Fusion-Tshuaj epoxy txheej | Zoo ib yam li ISO 21809-2. Canadian roj thiab roj kev lag luam tus qauv. |
| AWM C213 | USA (Dej) | Kua-Epoxy thiab Fusion-Tebchaws Epoxy Coatings | Tsom ntsoov rau cov kav dej thiab cov kav dej khib nyiab. Cov kev xav tau tuaj yeem nruj dua li cov qauv roj / roj. |
| DNVGL-RP-F102 | Europe / Ntiaj teb no | Factory Applied Field Joint Coating | Ib qho kev pom zoo, feem ntau siv nrog ISO 21809-2 rau kev sib koom ua ke. |
Leej twg siv tus qauv no?
Pipeline Operators / Cov tswv:Qhia cov qauv no hauv lawv qhov kev xav tau ntawm qhov project.
Pipe Coating Applicators:Siv nws ua cov lus qhia meej rau lawv cov txheej txheem tsim khoom thiab kev tswj kom zoo.
Tube Manufacturers:Xyuas kom lawv cov kav dej tsim nyog rau txheej raws li tus qauv no.
Engineering thiab Construction tuam txhab:Siv nws nyob rau hauv lawv cov qauv tsim thiab kev tsim kho specifications.
Thib peb-Tus Neeg Tshuaj Ntsuam Xyuas:Siv nws los xyuas kom meej tias cov kav dej coated ua tau raws li txhua qhov kev xav tau.
Cov Lus Cim Tseem Ceeb ntawm Kev Hloov Kho
ISO 21809-2: 2007 tau hloov kho.
Tam sim no version yogISO 21809-2: 2020. Nws yog ib qho tseem ceeb kom nco ntsoov xyuas cov ntawv tshiab. 2020 version suav nrog kev hloov kho tshiab thiab qhia meej raws li xyoo ntawm kev lag luam kev paub thiab kev nce qib thev naus laus zis. Yog tias koj tab tom ua haujlwm ntawm ib qhov project, koj yuav tsum paub meej tias 2007 lossis 2020 tsab tau teev tseg.
Yuav Ua Li Cas Tau Txais Tus Qauv
Koj tsis tuaj yeem tau txais tag nrho cov ntawv nyeem dawb, raws li ISO cov qauv yog cov ntaub ntawv muaj cai. Koj yuav tsum tau yuav lawv los ntawm qhov chaw ua haujlwm:
ISO Khw
National Standards Bodies(xws li ANSI hauv Asmeskas, BSI hauv UK, SAC hauv Suav teb).
Cov ntsiab lus
ISO 21809-2: 2007yog qhov tseeb thoob ntiaj teb specifications rau Fusion-Bonded Epoxy (FBE) sab nrauv txheej ntawm steel kav. Nws ua kom ntseeg tau tias cov txheej txheem siv tau raug thiab yuav ua tau zoo nyob rau ntau xyoo lawm - lub neej ntev ntawm cov kav dej, tiv thaiv nws los ntawm ib puag ncig corrosive.
Yog tias koj koom nrog hauv qhov project pipeline, cov ntaub ntawv no yog ib feem tseem ceeb ntawm cov kev qhia tshwj xeeb.
