TS EN ISO 21809-1siv rau faus lossis submerged pipeline systems hauv kev lag luam roj thiab roj thiab qhia txog cov kev cai rau cov txheej txheem tiv thaiv corrosion sab nraud3 LPE thiab 3LPPrauwelded thiab seamless steel kav.
Muaj peb chav kawm ntawm cov ntaub ntawv surfacing, nyob ntawm seb cov khoom siv surfacing:
A: LDPE (tsawg-density polyethylene);
B: MDPE / HDPE (nruab nrab-density polyethylene) / (high-density polyethylene);
C: PP (Polypropylene).
Cov kev xav tau ceev rau txhua yam khoom tau piav qhia hauv qab no hauv ntu ntu ntawm qhov yuav tsum tau ua rau peb cov khoom siv raw.
| Txheej txheej | Sab saum toj txheej khoom | Qhov kub thiab txias (°C) |
| A | LDPE | -20 rau + 60 |
| B | MDPE / HDPE | -40 rau + 80 |
| C | PP | -20 rau + 110 |
Txheej txheej yuav tsum muaj peb txheej:
1st txheej: epoxy (kua lossis hmoov);
2nd txheej: nplaum;
3rd txheej: PE / PP txheej sab saum toj thov los ntawm extrusion.
Yog tias xav tau, lub tsho tiv no tuaj yeem siv los ua kom muaj kev sib tw.Tshwj xeeb tshaj yog qhov uas txhim kho tuav thiab txo kev pheej hmoo ntawm zawv zawg yog yuav tsum tau.
Epoxy Resin Txheej Thickness
Ntau tshaj 400 um
Yam tsawg kawg nkaus: kua epoxу: yam tsawg kawg 50um;FBE: yam tsawg kawg 125um.
Adhesive Txheej Thickness
Yam tsawg kawg 150um ntawm cov yeeb nkab lub cev
Tag nrho Txheej Thickness
Lub thickness ntawm cov txheej txheem tiv thaiv corrosion yog hloov nrog qhov chaw thauj khoom thiab cov yeeb nkab qhov hnyav,thiab cov txheej txheem tiv thaiv corrosion ntawm thickness yuav tsum raug xaiv raws li kev tsim kho, cov yeeb nkab tso txoj kev, siv cov xwm txheej, thiab cov yeeb nkab loj.
Pm yog qhov hnyav ntawm cov yeeb nkab steel ib 'meter'.
uas tuaj yeem queried los ntawm kev sab laj tus cojluj rooj ntawm steel yeeb nkab txheem, los yog los ntawm tus qauv:
Pm = (DT) × T × 0.02466
D yog qhov teev sab nraud, qhia hauv mm;
T yog qhov tshwj xeeb phab ntsa thickness, qhia hauv mm;
Kev xav tau rau cov khoom siv Epoxy
Kev xav tau rau cov khoom siv Adhesive
Kev xav tau rau PE / PP Sab saum toj txheej
Cov txheej txheem tiv thaiv corrosion tuaj yeem muab faib ua:
1. Kev npaj nto;
2. Daim ntawv thov txheej
3. Cua txias
4. Txiav rov qab
5. Kev kos npe
6. Kev tshuaj xyuas cov khoom tiav
1. Kev npaj nto
Cov kev xav tau zoo sib xws muaj nyob hauv SSPC thiab NACE cov qauv, thiab cov hauv qab no yog cov ntawv sau dav dav:
| TS EN ISO 8501-1 | NACE | SSPC-SP | Lub npe |
| Ib 2.5 | 2 | 10 | Ze-dawb hlau moj tej tawg tu |
| Sa 3 | 1 | 5 | Dawb hlau moj tej tawg tu |
Thov nco ntsoov tias cov nyhuv ntawm Sa 2.5 tsis kho nyob ntawm qib corrosion ntawm cov yeeb nkab steel, uas yog categorized li A, B, C, thiab D, sib xws rau 4 cov teebmeem.
2. Daim ntawv thov txheej
Xyuas kom meej tias qhov kub thiab txias preheating thiab kab ceev ntawm cov yeeb nkab steel hauv txheej txheej txheej txheem yog tsim nyog kom ua tiav tag nrho curing ntawm cov hmoov txheej thiab xyuas kom meej cov adhesion ntawm txheej thiab tswj cov thickness ntawm txheej.
Lub thickness ntawm cov txheej txheem tiv thaiv corrosion kuj muaj feem xyuam rau cov khoom siv txheej txheej.
3. Cua txias
Cov txheej txheej yuav tsum tau txias rau qhov kub uas tiv thaiv kev puas tsuaj thaum ua tiav thiab kev tshuaj xyuas zaum kawg.
Feem ntau, qhov txias txias ntawm 3LPE tsis ntau tshaj 60 ℃, thiab qhov txias txias ntawm 3LPP yuav siab dua me ntsis.
4. Txiav rov qab
Ib qho ntev ntawm txheej yuav tsum tau muab tshem tawm los ntawm ob qho kawg ntawm cov yeeb nkab thiab cov txheej txheem tiv thaiv corrosion yuav tsum tsis txhob beveled ntawm lub kaum sab xis ntawm ntau tshaj 30 ° kom tiv thaiv kev puas tsuaj rau corrosion tiv thaiv txheej thaum vuam.
5. Kev kos npe
Ua raws li cov qauv thiab cov neeg siv khoom xav tau.
Cov cim no yuav tsum tau stenciled lossis pleev xim rau kom ntseeg tau tias cov ntawv sau meej thiab tsis ploj.
6. Kev tshuaj xyuas cov khoom tiav
Kev tshuaj xyuas tag nrho ntawm cov kav dej tiv thaiv corrosion kom ua tau raws li ISO 21809-1.
3 LPE Applications
3LPE coatings muaj cov tshuaj tiv thaiv siab, kev tiv thaiv zoo heev nrog rau kev ua haujlwm zoo, thiab cov nqi tu qis.
Nws yog tsim rau faus los yog underwater pipelines uas yuav tsum tau siab corrosion kuj thiab mechanical tiv thaiv nyob rau hauv av thiab dej ib puag ncig.
Feem ntau siv hauv cov kav dej rau kev thauj mus los ntawm cov roj, roj, thiab dej.
3 Cov ntawv thov LPP
3LPP txheej muaj qhov kub thiab txias thiab kev ruaj ntseg zoo tshaj li polyethylene.Txawm li cas los xij, nws tuaj yeem ua nkig ntawm qhov kub thiab txias.
Haum rau qhov kub thiab txias ntau dua thiab xav tau ib puag ncig, xws li cov kav dej hauv cov chaw kub lossis ze rau cov chaw ua tshuaj.
Feem ntau yog siv rau hauv cov kav dej thiab cov kav dej uas yuav tsum tau ua haujlwm kub.
TIAB SA 30670: Polyethylene coatings steel kav thiab fittings.
Qhov no yog German kev lag luam tus qauv tshwj xeeb rau polyethylene txheej rau steel kav thiab lawv fittings.
TIAB SA 30678: Polypropylene txheej ntawm cov kav hlau.
Polypropylene txheej txheej tshwj xeeb rau cov kav hlau.
GB/T 23257: Polyethylene txheej txheej txheem txheej txheem ntawm faus steel pipeline.
Qhov no yog lub teb chaws tus qauv nyob rau hauv Tuam Tshoj npog polyethylene txheej tshuab rau faus steel pipelines.
CSA Z245.21: Cog-applied external coatings for steel yeeb nkab.
Qhov no yog Canadian Standards Association (CSA) tus qauv uas qhia meej txog cov txheej txheem rau sab nraud polyethylene txheej siv los tiv thaiv cov yeeb nkab steel.
Cov khoom siv dav dav: Peb muab ntau yam kev xaiv ntawm cov pa roj carbon steel kav los ntawm qhov yooj yim mus rau siab heev alloys kom tau raws li koj xav tau ntau haiv neeg.
Kev ruaj ntseg zoo: Tag nrho cov khoom ua raws li cov qauv zoo thoob ntiaj teb, xws li ISO 21809-1, uas yog tsim tshwj xeeb rau kev tiv thaiv corrosion ntawm cov roj thiab roj kev lag luam.
Kev pabcuam customized: Tsis yog peb tsuas yog muab cov khoom lag luam, tab sis nyob ntawm qhov kev xav tau ntawm qhov project thiab ib puag ncig, cov txheej txheem tiv thaiv corrosion thiab cov kav hlau hlau tuaj yeem raug kho kom ntseeg tau tias qhov kev ua tau zoo tshaj plaws thiab kev ua haujlwm zoo.
Kev txhawb nqa thiab kev pabcuam rau cov neeg siv khoom: Peb pab pawg kws tshaj lij muab cov lus qhia thiab kev txhawb nqa los pab cov neeg siv khoom xaiv cov yeeb nkab steel uas tsim nyog tshaj plaws thiab cov kev daws teeb meem los tiv thaiv corrosion kom ntseeg tau tias kev ua tiav ntawm lawv cov haujlwm.
Kev teb sai thiab xa khoom: Nrog rau cov khoom lag luam loj thiab cov khoom lag luam zoo, peb tuaj yeem teb sai sai rau cov neeg siv khoom xav tau thiab xyuas kom lub sijhawm xa khoom.
Peb tab tom nrhiav rau pem hauv ntej los koom tes nrog koj los muab cov yeeb nkab steel zoo tshaj plaws thiab cov txheej txheem tiv thaiv corrosion rau koj cov haujlwm.Thov koj xav tiv tauj peb kom paub meej cov khoom lag luam ntxiv, peb zoo siab los pab koj nrhiav qhov zoo tshaj plaws steel yeeb nkab xaiv rau koj cov kev xav tau!
