AWWA C213-21: Liquid-Epoxy Txheej Systems rau sab hauv thiab sab nrauv ntawm cov kav dej steel
*(Ceeb Toom: Xyoo 2001 koj tau hais txog tau hloov pauv los ntawm cov ntawv tshiab, nrog rau tam sim no yog C213-21. Cov ntsiab lus tseem ceeb tseem zoo ib yam, tab sis cov ntaub ntawv hauv qab no qhia txog cov kev coj ua zoo tshaj plaws thiab cov kev xav tau.)*
1. AWWA C213 yog dab tsi?
AWWA C213 yog American Water Works Association tus qauv uas qhia txog cov kev cai raufusion-cov txheej txheem epoxy (FBE) txheej txheejsiv rau sab hauv thiab / lossis sab nrauv ntawm cov kav dej steel, fittings, thiab ntu tshwj xeeb.
Cov coatings no yog siv rau:
Tiv thaiv corrosion:Ua ib qho kev ruaj khov, tsis tu ncua uas tiv thaiv dej thiab av los ntawm kev sib cuag ntawm cov hlau nto.
Tswj dej kom zoo:Muab cov kab du, tsis muaj zog uas tiv thaiv tuberculation (xeb nodules) thiab txo qis kev sib txhuam.
Extend pipeline kev pab lub neej:Qhov tseem ceeb ua rau lub neej ua haujlwm ntawm kev xa dej lossis cov kav dej xa tawm, feem ntau mus txog 50 xyoo lossis ntau dua.
2. Cov ntsiab lus tseem ceeb ntawm tus qauv
Tus txheej txheem yog qhov dav thiab npog txhua kauj ruam los ntawm kev npaj saum npoo mus rau kev tshuaj ntsuam zaum kawg.
A. Kev Npaj Nto
Qhov no yog cov kauj ruam tseem ceeb tshaj plaws rau kev ua tiav txheej txheej. Tus txheej txheem mandates:
Ntxuav:Txhua qhov chaw steel yuav tsum tsis muaj roj, roj, av, plua plav, thiab lwm yam kab mob.
Abrasive Blasting:Cov yeeb nkab saum npoo yuav tsum tau blasted - ntxuav rau aZe ntawm -White Hlau (SSPC-SP 10)los yogDawb Hlau (SSPC-SP 5)theem ntawm kev huv.
Nto Profile:Lub abrasive blasting yuav tsum tsim kom muaj cov qauv thauj tog rau nkoj (profile) ntawm cov hlau, feem ntau ntawm2.0 thiab 4.0 mils (50-100 micrometers), los xyuas kom meej cov neeg kho tshuab adhesion ntawm epoxy.
B. Txheej Khoom (FBE Hmoov)
epoxy hmoov nws tus kheej yuav tsum ua raws li cov txheej txheem nruj:
Kev Xeem Txuj Ci:Cov khoom tshwj xeeb FBE yuav tsum raug kuaj thiab tsim nyog hauv chav kuaj ywj pheej raws li tus qauv yuav tsum tau ua.
Khoom siv:Nws yuav tsum yog 100% solids, thermosetting hmoov uas tsis pub dawb - ntws, ruaj khov, thiab tsis muaj cov co toxins uas tuaj yeem cuam tshuam cov dej haus.
Ntawv pov thawj:Cov chaw tsim khoom txheej yuav tsum muab ntawv pov thawj tias cov khoom ua tau raws li NSF / ANSI 61 rau kev sib cuag dej.
C. Daim ntawv thov txheej
Txoj kev thov:Cov txheej yuav tsum tau siv nrog ib tugelectrostatic tsuaglos yogfluidized txajtxheej txheem.
Kho:Cov yeeb nkab coated yog cua sov hauv qhov cub kom yaj, ntws, thiab tshuaj lom neeg hla -txuas (kho) cov hmoov epoxy rau hauv cov yeeb yaj kiab tas mus li.
Kev tswj qhov kub thiab txias:Cov hlau kub thaum lub sij hawm ua ntej - cua sov thiab kho yog nruj me ntsis tswj xyuas kom zoo fusion thiab kho yam tsis muaj degrading txheej.
D. Txheej Thickness
Tus qauv qhia qhov tsawg kawg nkaus thiab nominal thicknesses los xyuas kom meej ib tug tas mus li, pinhole -dawb zaj duab xis tsis yog li ntawd tuab uas nws ua nkig.
| Nto | Yam tsawg kawg nkaus Thickness | Nominal Thickness |
|---|---|---|
| Cov yeeb nkab sab hauv | 16 hli (400 µm) | 20 hli (500 µm) |
| Cov yeeb nkab sab nrauv | 16 hli (400 µm) | 20 hli (500 µm) |
| Fittings & Fabrications | 14 hli (350 µm) | 16 hli (400 µm) |
E. Kev kuaj thiab tshuaj xyuas
Kev tswj kom zoo yuav tsum tau muaj thoob plaws hauv cov txheej txheem:
Hauv - txheej txheem:
Nto Prep:Tshawb xyuas qhov huv thiab qhov profile.
Kho:Saib xyuas steel kub profiles.
Kev soj ntsuam zaum kawg (Txhua Cov Yeeb Nkab):
Nyiaj so koobtsheej (Pinhole) Detection:100% ntawm cov txheej yog tshuaj xyuas los ntawm kev siv lub siab -voltage so detector kom pom tias muaj kev cuam tshuam dab tsi. Qhov ntsuas hluav taws xob yog qhov tseeb raws li txheej txheej thickness.
Kev ntsuas Thickness:Txheeb xyuas nrog lub ntsuas magnetic.
Kev Ntsuas Adhesion:Ib qho kev xeem zoo (xws li kev xeem riam phom) feem ntau ua.
Kev Xeem Txuj Ci thiab Ntawv Pov Thawj (Pib Batch / Ntau):
Cathodic Disbondment:Ntsuas cov txheej tiv thaiv kev puas tsuaj thiab kev ua haujlwm raws li kev tiv thaiv cathodic.
Flexibility (Bend Test):Xyuas kom cov txheej yuav tsis tawg thaum cov yeeb nkab yog khoov los yog deflected.
Impact Resistance:Ntsuas tiv thaiv kev puas tsuaj rau cov khoom siv thaum tuav thiab thim rov qab.
Chemical Resistance:Kev ntsuas immersion los xyuas qhov kev ua tau zoo hauv cov dej chemistry.
3. Qhov zoo ntawm C213 Txheej
Kev tiv thaiv corrosion zoo heev:Muab lub siab dielectric barrier.
Superior Adhesion:Chemically thiab mechanically bonds rau cov hlau.
Smooth nto:Txo cov nqi siv dej thiab txhim kho hydraulic efficiency.
Abrasion Resistance:Withstands tuav thiab installation.
Compatibility nrog Cathodic Protection:Ua haujlwm synergistically rau lub zog tiv thaiv corrosion.
Lub neej ua haujlwm ntev:Pov thawj kev ua tau zoo tshaj kaum xyoo.
4. Kev siv ntau
Loj -Diameter Transmission Mains
Cog txheej txheem Pipingnyob rau hauv cov chaw kho dej thiab cov dej khib nyiab
Subaqueous Pipelines(kev hla dej, pas dej nkag / tawm)
Bored thiab Jacked Casings
Pipeline Rehabiliation(tuaj yeem siv rau cov kav dej uas twb muaj lawm)
Lus Cim Tseem Ceeb ntawm Tsab Ntawv (2001 vs. Tam sim no)
Thaum koj siv tau rau xyoo 2001, nws yog ib qho tseem ceeb uas yuav tau siv covAWWA C213-21. Cov qauv raug hloov kho tsis tu ncua kom suav nrog cov thev naus laus zis tshiab, cov ntaub ntawv, thiab cov lus qhia tau kawm los ntawm thaj chaw. Daim ntawv 2021 suav nrog cov kev cai tam sim no tshaj plaws rau:
Kho cov txheej txheem xeem.
Hloov kho cov txheej txheem kev nyab xeeb thiab ib puag ncig.
Kev piav qhia ntawm cov txheej txheem thov rau fittings thiab tshwj xeeb.
Thaum qhia txog ib qhov project, koj yuav tsum nco ntsoov hais txog cov qauv tam sim no tshaj plaws los xyuas kom meej tias cov kev coj ua tau zoo tshaj plaws.
Hauv cov ntsiab lus,AWWA C213 yog tus qauv ntsuas ntsuas rau siab -kev ua tau zoo, ruaj khov epoxy txheej uas tiv thaiv kev ncaj ncees ntawm cov kav dej steel thiab qhov zoo ntawm cov dej uas lawv nqa.
