SY/T 0315-2002, Txheem rau Sab Nraud Fusion Bonded Epoxy Txheej rau Hlau Yeeb Nkab, yog Suav roj av thiab cov nkev kev lag luam tus qauv uas tswj hwm fusion-bonded epoxy (FBE) hmoov txheej siv rau kev tiv thaiv kev tiv thaiv sab nraud ntawm cov kav hlau. Rau ntau tshaj li kaum xyoo nws yog lub hauv paus ntawm kev tswj cov txheej txheem sab nraud ntawm Tuam Tshoj loj onshore thiab offshore roj thiab roj pipeline tej yaam num, thiab nws tseem yog ib qho tseem ceeb siv cov ntaub ntawv rau kev ntsuam xyuas pipelines tsim nyob rau lub sij hawm ntawd.
Scope thiab Daim Ntawv Thov
Tus qauv siv rau kev tiv thaiv kev tiv thaiv sab nraud ntawm faus lossis submerged steel pipelines. Nws npog ob qho tib si seamless thiab welded steel yeeb nkab, thiab nws tau sau rau cov kav dej nrog kev ua haujlwm tsis tu ncua mus txog 80 degree. Cov haujlwm uas xav tau kev pabcuam kub siab dua qhia tshwj xeeb siab - kub FBE qib sab nraum qhov ib txwm muaj ntawm tus qauv no.
| Yam khoom | Kev xav tau |
|---|---|
| Daim ntawv thov | Sab nraud corrosion tiv thaiv ntawm faus los yog submerged steel pipelines |
| Hom yeeb nkab | Seamless steel yeeb nkab thiab welded steel yeeb nkab |
| Kev khiav hauj lwm kub tsis tu ncua | Txog li 80 degree; tshwj xeeb siab - kub FBE qib rau lub luag haujlwm siab dua |
| International references | CAN/CSA-Z245.20, ANSI/AWWA C213, ISO 21809 cov qauv |
Kev npaj nto
Kev npaj nto yog ib kauj ruam tseem ceeb tshaj plaws hauv FBE txheej. Tus txheej txheem yuav tsum tau tshem tawm tag nrho cov roj, roj, av, thiab cov khoom paug, ua raws li abrasive blasting mus rau ze ntawm - cov hlau dawb ua kom tiav raws li Sa 2.5 hauv thoob ntiaj teb teev. Lub thauj tog rau nkoj profile, lub microscopic roughness uas muab lub epoxy ib tug neeg kho tshuab tuav, yuav tsum tau tswj nyob rau hauv lub teev ntau yam, feem ntau 50 mus rau 100 micrometers (2 mus rau 4 mils). Tom qab blasting, tag nrho cov hmoov av abrasive yuav tsum tau muab tshem tawm ua ntej cua sov thiab hmoov thov.
| Kauj ruam | Kev xav tau |
|---|---|
| Ntxuav | Tshem tawm cov roj, roj, av, thiab tag nrho lwm yam kab mob |
| Abrasive blasting | Ze ntawm - dawb hlau tiav, Sa 2.5 |
| Anchor profile | Feem ntau 50 txog 100 micrometers (2 mus rau 4 mils) |
| Kev tshem tawm plua plav | Tag nrho cov hmoov av abrasive tshem tawm tom qab blasting |
FBE Powder Requirements
Lub epoxy hmoov nws tus kheej yuav tsum tau raws li cov tshuaj thiab lub cev muaj zog kom tau txais cov txiaj ntsig ntawm daim ntawv thov rov ua dua los ntawm batch mus rau batch. Kev kho lub sijhawm, kev sib xyaw ua ke ntawm lub sijhawm thiab qhov kub thiab txias ntawm cov hmoov yaj, ntws, thiab hla tag nrho - txuas, yog qhov tseem ceeb ntawm kev lees txais. Sieve tsom xam xyuas cov particle loj tis rau daim ntawv thov electrostatic zoo ib yam, thiab cia tej yam kev mob tau teev tseg kom tsis txhob ya raws thiab clumping ua ntej siv.
Daim ntawv thov txheej
Daim ntawv thov ua raws li kev tswj xyuas thermal. Cov yeeb nkab npaj tau preheated rau qhov ntsuas kub, feem ntau 230℃txog 250 degree, thiab FBE hmoov yog electrostatically sprayed mus rau lub rhuab rotating yeeb nkab. Cov hmoov melts thiab fuses ntawm kev sib cuag, thiab cov cua sov uas khaws cia ua tiav cov kev kho thaum cov yeeb nkab txias. Precise tswj ntawm preheat kub thiab kab ceev txiav txim siab zaum kawg txheej zoo, thiab txheej thickness yog saib tsis tu ncua thaum lub sij hawm ntau lawm.
Txheej Khoom thiab Kev Tshuaj Xyuas
Cov txheej tiav lawm yuav tsum dhau qhov kev sim ua ntu zus ua ntej txais. Cov zaj duab xis qhuav tuab (DFT) feem ntau teev nyob rau hauv thaj tsam ntawm 350 txog 500 micrometers (14 mus rau 20 mils). Cathodic disbondment test ntsuas qhov tsis kam ntawm cov txheej rau kev tshem tawm ntawm cov hlau nyob rau hauv kev cuam tshuam ntawm cathodic tiv thaiv kab ke, nrog rau qhov siab tshaj plaws tso cai disbondment radii soj ntsuam tom qab 28-hnub lossis 48-hnub xeem. Adhesion raug txheeb xyuas los ntawm kev kuaj tev nrog qhov tsawg kawg nkaus lub zog, thiab kev hloov pauv tau raug kuaj xyuas los ntawm kev khoov cov yeeb nkab coated nyob ib ncig ntawm lub mandrel tsis tawg lossis tawg. Kev cuam tshuam kev cuam tshuam yog ntsuas los ntawm kev poob qis rau ntawm qhov chaw coated, hardness los ntawm mem hluav hardness los yog sib npaug txoj kev, thiab porosity los ntawm kev soj ntsuam tag nrho saum npoo nrog high-voltage nyiaj so koobtsheej ntes kom pom pinholes thiab voids.
| Kuaj | Lub hom phiaj |
|---|---|
| Qhuav zaj duab xis thickness | Pom zoo DFT nyob rau hauv 350 txog 500 micrometer ntau yam |
| Cathodic disbondment | Kev ntsuas kev tiv thaiv kev cuam tshuam hauv kev tiv thaiv cathodic tom qab 28 lossis 48 hnub |
| Adhesion | Peel kuaj xyuas qhov tsawg kawg nkaus daim ntawv cog lus lub zog rau cov hlau |
| Yooj yim | Khoov xeem nyob ib ncig ntawm lub mandrel tsis tawg |
| Kev cuam tshuam tsis kam | Tso- ntsuas qhov hnyav rau kev tiv thaiv kev puas tsuaj |
| Hardness | Pencil hardness los yog sib npaug txoj kev |
| Soj ntsuam xyuas | High-Voltage scan rau pinholes thiab voids hla tag nrho saum npoo |
Lub luag haujlwm hauv Multi- Txheej Txheej Txheej Txheej Txheej
FBE txheej tau teev tseg raws li SY/T 0315-2002 feem ntau yog siv los ua cov txheej primer hauv cov txheej txheem txheej txheej nyuaj. Hauv peb- txheej polyethylene (3LPE) thiab peb- txheej polypropylene (3LPP) txheej txheem, FBE txheej muab cov adhesion zoo heev rau lub blasted steel nto thaum cov txheej txheej polymer ntxiv cov khoom siv tiv thaiv thiab tiv thaiv cov av kev ntxhov siab. Qhov zoo ntawm FBE primer txiav txim siab qhov ntev -kev ua tau zoo ntawm tag nrho cov txheej txheem ntau txheej.
Cov xwm txheej tam sim no: Superseded los ntawm SY/T 0315-2013
SY/T 0315-2002 tau hloov los ntawm SY/T 0315-2013. Kev hloov kho xyoo 2013 suav nrog kev nce qib hauv cov thev naus laus zis thev naus laus zis, cov txheej txheem kev sim ua kom zoo, thiab ua raws cov qauv zoo dua nrog kev coj ua thoob ntiaj teb xws li ISO 21809. Cov ntsiab lus tseem ceeb ntawm kev npaj nto, fusion bonding, thiab cathodic disbondment tswj tseem tsis hloov, tab sis cov txheej txheem tshwj xeeb thiab kev lees txais tau hloov kho. Cov haujlwm tshiab yuav tsum hais txog tsab ntawv tam sim no, thaum xyoo 2002 tseem muaj feem cuam tshuam rau kev soj ntsuam thiab kho cov kav xa dej rov qab thaum lub sijhawm siv tau.
FAQ
SY/T 0315-2002 npog dab tsi?
Nws qhia txog qhov yuav tsum tau ua rau sab nraud fusion-bonded epoxy (FBE) hmoov txheej ntawm cov kav dej steel rau faus lossis submerged kev pabcuam, npog qhov chaw npaj, cov khoom siv hmoov, daim ntawv thov, kho, thiab tshuaj xyuas thiab kuaj.
Qhov txawv ntawm SY/T 0315-2002 thiab SY/T 0315-2013 yog dab tsi?
Xyoo 2013 hloov kho tshiab cov qauv kev sim, ua kom zoo dua cov qauv kev lees paub, thiab ua raws cov qauv nrog kev coj ua thoob ntiaj teb xws li ISO 21809. Lub xyoo 2002 tau hloov dua tshiab tab sis tseem tseem ceeb rau kev ntsuas cov kav dej hauv lub sijhawm siv tau.
Qhov kev npaj saum npoo yuav tsum tau ua li cas?
Nyob ze -dawb hlau abrasive blasting rau Sa 2.5, lub thauj tog rau nkoj profile feem ntau ntawm 50 mus rau 100 micrometers, ua kom tiav cov khoom tsis huv, thiab tshem tawm cov plua plav kom huv si ua ntej cua sov thiab hmoov thov.
Dab tsi yog qhov tshwj xeeb qhuav zaj duab xis thickness rau FBE txheej?
Cov zaj duab xis qhuav yog feem ntau teev nyob rau hauv thaj tsam ntawm 350 txog 500 micrometers (14 mus rau 20 mils), txheeb xyuas los ntawm kev soj ntsuam tas li thiab ntsuas qhov chaw.
Vim li cas kev kuaj cathodic disbondment tseem ceeb?
Nws ntsuas zoo npaum li cas cov txheej tiv thaiv kev tshem tawm ntawm cov hlau raws li hluav taws xob cuam tshuam ntawm cathodic tiv thaiv system. Cov chaw tawg loj loj nthuav tawm cov yeeb nkab rau corrosion, yog li qhov kev ntsuam xyuas yog qhov ncaj qha kwv yees ntawm qhov ntev - lub sij hawm txheej txheej.
Cov qauv thoob ntiaj teb twg yog SY/T 0315-2002 sib npaug?
Nws yog Suav tus neeg sib tw ntawm CAN/CSA-Z245.20 hauv Canada thiab ANSI/AWWA C213 hauv Tebchaws Meskas, thiab xyoo 2013 hloov kho raws li cov hauv paus ntsiab lus ntawm ISO 21809.
