Txheej txheem cej luam: AWWA C 213 yog dab tsi?
AWM C 213yog American Water Works Association tus qauv rau"Liquid-Epoxy Txheej Txheej Txheej Txheem rau Sab Hauv thiab Sab Nraud ntawm Cov Yeeb Nkab Hlau Dej."
Hauv cov ntsiab lus yooj yim, nws qhia meej txog qhov yuav tsum tau ua rau fusion-bonded epoxy (FBE) hmoov txheej siv los tiv thaivsab hauv (internal barrier)thiabsab nraud (external barrier)ntawm steel dej kav, fittings, thiab tshwj xeeb seem los ntawm corrosion.
Nws lub hom phiaj tseem ceeb yog los xyuas kom meej tias cov khoom siv txheej thiab nws daim ntawv thov tsim kom muaj kev ruaj khov, tiv thaiv kev tiv thaiv uas:
Tiv thaiv corrosionntawm steel substrate.
Tswj dej kom zoolos ntawm tsis yog - tshuaj lom thiab tiv thaiv xeb thiab nplai los ntawm kev nkag mus rau hauv dej.
Muab ibsmooth, hydraulically npaum ntouas txo cov nqi siv dej.
Cov cheeb tsam tseem ceeb them los ntawm tus qauv
Cov txheej txheem yog kev qhia dav thiab npog cov khoom siv nws tus kheej, cov txheej txheem thov, thiab cov khoom kawg qhov zoo.
1. Coating Material Requirements
Tus qauv qhia txog lub cev thiab tshuaj lom neeg ntawm epoxy hmoovua ntejnws yog siv. Cov kev ntsuam xyuas tseem ceeb suav nrog:
NSF / ANSI 61 Daim Ntawv Pov Thawj:Qhov no tsis yog -negotiable. Cov txheej yuav tsum tau ntawv pov thawj rau kev sib cuag nrog cov dej haus kom ntseeg tau tias nws tsis tso cov tshuaj phem.
Lub Sijhawm Kho Mob:Txhais lub sijhawm thiab qhov kub thiab txias uas yuav tsum tau ua rau cov hmoov yaj, ntws, thiab kho tag nrho.
Lub neej txee:Cov hmoov yuav tsum tau muab khaws cia kom zoo thiab siv nyob rau hauv nws lub txee lub neej kom ntseeg tau tias kev ua tau zoo.
Tshuaj muaj pes tsawg leeg:Tus qauv yuav hais txog tej yam ntawm epoxy resins thiab curing agents haum rau daim ntawv thov no.
2. Kev Npaj Nto (Ib kauj ruam tseem ceeb)
Tus qauv muaj cov cai nruj rau kev npaj cov hlau nto ua ntej txheej. Kev npaj ua kom zoo yog qhov tseem ceeb rau txheej txheej adhesion thiab ua haujlwm ntev -.
Abrasive Blasting:Cov hlau yuav tsum tau tawg - ntxuav kom huvNyob ze -White Hlauua kom tiav (SSPC-SP 10).
Nto Profile:Nws yuav tsum ua kom tiav cov qauv thauj tog rau nkoj tshwj xeeb (feem ntau 2-4 mils lossis 50-100 micrometers) kom muab cov khoom siv "hlau" rau txheej tuav.
Kev huv huv:Qhov saum npoo yuav tsum tsis muaj roj, roj, plua plav, noo noo, thiab lwm yam kab mob.
3. Daim ntawv thov txheej
Tus qauv qhia txog cov txheej txheem rau kev siv cov txheej:
Txoj kev:Cov hmoov epoxy yog siv electrostatically rau pre-rhuab steel yeeb nkab.
Cov yeeb nkab cua sov:Cov yeeb nkab yog rhuab nyob rau hauv ib qho induction los yog qhov cub kom qhov kub thiab txias kom cov hmoov fuse thiab ntws.
Kho:Cov yeeb nkab yog tuav ntawm qhov kub thiab txias rau lub sijhawm teev kom ua tiav qhov kev sib tw tag nrho -txuas txuas, txheej ruaj khov.
Thickness:Tus qauv qhia txog qhov yuav tsum tau ua kom qhuav zaj duab xis thickness (DFT), feem ntau:
Sab hauv txheej:16 mils (400 µm) yam tsawg kawg nkaus.
Sab nrauv txheej:16 mils (400 µm) yam tsawg kawg nkaus.
Tag Nrho Txheej (yog tias ob sab yog coated hauv ib qho haujlwm):20 mils (500 µm) yam tsawg kawg nkaus.
4. Kev kuaj thiab tshuaj xyuas (Kev Tswj Xyuas Zoo)
Qhov no yog ib feem tseem ceeb ntawm tus qauv, kom ntseeg tau tias cov yeeb nkab coated ua tau raws li cov qauv kev ua tau zoo. Kev ntsuam xyuas yog ua tiav ntawm ob daim coupons xeem thiab cov yeeb nkab tiav.
Kev xeem ntawm Laboratory Test Panels (Coated Coupons):
Cathodic Disbondment:Ntsuas cov txheej tiv thaiv kom tshem tawm ntawm cov hlau thaum nyob hauv kev tiv thaiv cathodic (ib qho kev sim tseem ceeb rau cov txheej txheem sab nraud).
Adhesion:Ntsuam xyuas qhov zoo ntawm cov ntawv cog lus rau cov hlau (feem ntau yog siv "rub-tawm" xeem).
Impact Resistance:Xyuas kom cov txheej tuaj yeem tiv taus lub cev tsis muaj kev tawg lossis tawg.
Flexibility (Bend Test):Xyuas seb cov txheej puas tuaj yeem khoov nrog cov hlau tsis muaj kev tawg.
Chemical Resistance:Txheeb xyuas cov tshuaj tiv thaiv tshwj xeeb.
Kev ntsuam xyuas ntawm cov yeeb nkab tiav Coated:
Nyiaj so koobtsheej (Pinhole) Detection:100% ntawm cov coated nto yog tshuaj xyuas siv lub siab -voltage so detector kom pom tej yam me me los yog voids hauv txheej.
Thickness checks:Txheeb xyuas nrog lub ntsuas qhov sib nqus DFT kom ntseeg tau tias nws ua tau raws li qhov xav tau yam tsawg kawg nkaus.
Kev tshuaj xyuas qhov muag:Cov txheej yuav tsum du, sib xws ntawm cov xim, thiab tsis muaj kev khiav, sags, hlwv, lossis lwm yam tsis xws luag.
Vim li cas AWWA C 213 tseem ceeb?
Public Health:Daim ntawv pov thawj NSF / ANSI 61 ua kom cov txheej txheem tsis muaj paug cov dej haus.
Khoom Muaj Peev Xwm Ntev:Tiv thaiv cov dej tseem ceeb los ntawm kev xeb, txuas lub neej ntawm cov kav dej mus rau 50-100 xyoo lossis ntau dua.
System Reliability:Tiv thaiv kom tsis txhob xau thiab tsis ua haujlwm, ua kom muaj kev ruaj ntseg dej.
Hydraulic Efficiency:Lub sab hauv du nto txo kev sib txhuam, txo cov nqi zog rau kev siv.
Kev lag luam Standard:Nws muab ib qho kev qhia tshwj xeeb uas cov tswv, engineers, manufacturers, thiab cov neeg cog lus tuaj yeem tso siab rau, kom ntseeg tau tias muaj kev sib luag thiab ua tau zoo ntawm cov haujlwm.
Tej kev siv
AWWA C 213 coated yeeb nkab yog siv rau:
Raw thiab Potable Water Transmission Mains
Tunnel Liners
Cog Pipinghauv cov chaw kho dej
Loj -Txoj kab uas hla nkag thiab tawm
Force Mainsrau cov dej khib nyiab (txawm hais tias sab nraud yuav tsum tau ua tib zoo soj ntsuam)
Qhov tseem ceeb Distinction
AWM C 213yog raukhw- sivcoatings ntawm cov yeeb nkab steel tshiab. Kev tswj hwm ib puag ncig ntawm lub khw muag khoom yog qhov tseem ceeb rau kev ua tiav tus qauv zoo.
AWM C 210yog raukua- sivepoxy coatings, uas feem ntau yog siv rau kev sib koom ua ke, kho, lossis hauv - kho dua tshiab ntawm cov kav dej uas twb muaj lawm.
Cov ntsiab lus
AWM C 213yog tus qauv tseeb rau siab -kev ua tau zoo, fusion- cov txheej txheem epoxy siv los tiv thaiv cov kav dej steel. Nws lav qhov ruaj khov, ntev - kav ntev, thiab kev noj qab haus huv- ua raws li kev tiv thaiv corrosion, ua rau nws yog lub hauv paus ntsiab lus rau kev xa dej thiab kev xa tawm niaj hnub no. Thaum koj teev "AWWA C 213 Txheej," koj tab tom qhia txog qhov kev sim nruj thiab zoo- khoom lag luam.
Tsis lees paub:Rau qhov project specifications, ib txwm xa mus rau qhov tseeb version ntawm AWWA C 213 tus qauv, raws li cov kev xav tau tuaj yeem hloov kho.
