Introduction to AWWA C210
AWWA C210 - Liquid Epoxy Txheej Systems rau sab hauv thiab sab nrauv ntawm cov kav dej steelyog ib lub koom haum American Water Works Association tus qauv uas qhia txog qhov yuav tsum tau muaj rau ob -cov khoom, kua- siv epoxy txheej thiab hauv ob sab phlu siv los tiv thaiv cov kav dej steel.
Lub hom phiaj tseem ceeb ntawm cov txheej txheem no yog:
Tiv thaiv Corrosion:Tiv thaiv cov hlau substrate los ntawm ob qho tib si corrosive ntsiab nyob rau hauv cov av (sab nrauv) thiab cov dej nqa (sab hauv).
Tswj dej kom zoo:Tiv thaiv kom tsis txhob muaj xeb thiab nplai hauv cov yeeb nkab, uas tuaj yeem ua rau cov dej tsis zoo, txo cov peev txheej, thiab ua rau cov xim tsis zoo.
Extend Service Life:Qhov tseem ceeb nce kev ua haujlwm lifespan ntawm steel pipelines.
Cov cheeb tsam tseem ceeb ntawm daim ntawv thov
AWWA C210 txheej yog siv nyob rau hauv ob lub ntsiab ntsiab lus:
Tshiab Pipeline Kev Tsim Kho:Siv rau cov kav hlau tshiab, fittings, thiab tshwj xeeb (lub luj tshib, tees, thiab lwm yam) ua ntej kev teeb tsa.
Rehabilitation ntawm Existing Pipelines:Siv los rov-kab thiab tiv thaiv cov kav dej qub, corroded hauv -situ, feem ntau tom qab ntxuav thiab npaj nto.
Tus qauv npog daim ntawv thov rau ob qho tib sisab hauv(kub) thiabsab nrauv(txheej) ntawm cov yeeb nkab.
Cov ntaub ntawv xav tau (Lub Epoxy nws tus kheej)
Tus qauv teeb tsa cov txheej txheem ua haujlwm nruj rau cov khoom siv kua epoxy nws tus kheej. Cov khoom tseem ceeb muaj xws li:
Volatile Organic Compound (VOC) Cov ntsiab lus:Yuav tsum ua raws li kev cai txwv, ua rau nws xaiv ib puag ncig zoo.
Solubility:Yuav tsum tau insoluble hauv dej tom qab kho kom ntseeg tau tias nws tsis nkag mus rau hauv cov dej haus.
Lub Sijhawm Kho Mob:Yuav tsum ua kom tiav ib theem ntawm hardness nyob rau hauv ib lub sij hawm teev nyob rau hauv tus txheej txheem kub.
Permanent, Thermoset Txheej:Thaum kho tau lawm, cov txheej yuav tsis tuaj yeem rov ua dua -cov kuab tshuaj, ua kom ruaj khov, hla - cov yeeb yaj kiab txuas.
Kev ua tau zoo thiab kev xeem yuav tsum tau ua
Qhov no yog lub hauv paus ntawm tus qauv. Coated specimens yuav tsum xeem dhau ib qho kev xeem nruj kom ua pov thawj lawv cov kav ntev thiab kev nyab xeeb.
1. Kev Xeem Txuj Ci (rau cov ntaub ntawv pom zoo):
Cathodic Disbondment:Ntsuas cov txheej tiv thaiv kom tshem tawm ntawm cov hlau thaum nyob rau hauv hluav taws xob cuam tshuam ntawm cathodic tiv thaiv systems. Qhov no yog ib qho kev ntsuam xyuas tseem ceeb rau cov txheej txheem sab nrauv.
Chemical Resistance:Cov txheej yuav tsum tiv taus immersion nyob rau hauv ntau yam acids, bases, thiab ntsev tov yam tsis softening, blistering, los yog poob adhesion.
Adhesion:Kev sim los ntawm kev rub ncaj qha- tawm txoj hauv kev kom ntseeg tau tias muaj kev sib raug zoo rau cov hlau substrate.
Impact Resistance:Cov txheej yuav tsum tsis txhob tawg los yog tawg thaum raug rau ib qho kev cuam tshuam quab yuam, simulating pob zeb nyob rau hauv backfill los yog tuav puas.
Flexibility (Bend Test):Cov qauv coated yog khoov ib ncig ntawm lub mandrel; Cov txheej yuav tsum tsis txhob tawg, kom ntseeg tau tias nws tuaj yeem tiv taus cov yeeb nkab deflection thaum lub sijhawm teeb tsa thiab ua haujlwm.
Abrasion Resistance:Ntsuas cov txheej txheej muaj peev xwm tiv taus hnav los ntawm cov dej ntws nrog cov khoom raug tshem tawm (rau cov ntaub ntawv sab hauv).
2. Txheej Txheem (rau kev lees paub zoo):
Dry Film Thickness (DFT):Qhia txog qhov xav tau thickness ntau rau ob qho tib si sab hauv thiab sab nrauv cov kev pabcuam. Hom DFTs muaj li ntawm 12 txog 20 mils (300 txog 500 microns).
Nyiaj so koobtsheej (Pinhole) Detection:Cov txheej kho kom zoo yuav tsum yog 100% tsis muaj kev cuam tshuam, txheeb xyuas siv lub siab -voltage hnub so detector.
Xim:Cov txheej txheej sab nrauv feem ntau yog grey, tsaus ntsuab, lossis dub. Cov kab hauv ob sab hauv feem ntau yog xim lub teeb (dawb lossis lub teeb grey) los pab hauv kev tshuaj xyuas.
Tseem Ceeb Tseem Ceeb: Kev Npaj Nto
AWWA C210 mandates ze -White metal blast cleaning.Tus qauv xav tau aSSPC-SP 10 / NACE No. 2kev npaj nto, ua tiav qhov profile huv si tsis pom cov roj, roj, plua plav, xeb, zeb nplai, lossis txawv teb chaws.
Anchor Profile:Ib qho qauv thauj tog rau nkoj (feem ntau yog 1.5 mus rau 4 mils / 38 mus rau 100 microns) yuav tsum tau muab lub tshuab "hlau" rau cov epoxy ua raws li.
Vim li cas nws tseem ceeb:Kev npaj saum npoo kom raug yog qhov sib cav tseem ceeb tshaj plaws nyob rau hauv lub sijhawm ntev - kev ua tiav ntawm txheej txheej txheej. Txawm tias qhov zoo tshaj plaws epoxy yuav ua tsis tau yog tias siv rau qhov chaw npaj tsis zoo.
Kev Noj Qab Haus Huv thiab Kev Nyab Xeeb: Potable Water Contact
Vim tias cov txheej txheem no siv rau hauv cov kav dej uas muaj peev xwm, lawv yuav tsum tau ntawv pov thawj rau ANSI / NSF 61:Cov Dej Haus Dej Dej Cov Cheebtsam - Kev Noj Qab Haus Huv. Cov ntawv pov thawj ywj pheej no ua kom ntseeg tau tias cov txheej txheem kho tsis tau tso cov kab mob tsis zoo rau hauv cov dej haus, ua rau muaj kev nyab xeeb rau pej xeem kev noj qab haus huv.
Txheej txheem kev thov
Ntxuav:Tshem cov roj, roj, thiab av.
Abrasive Blasting:Rau SSPC-SP 10 (Zoo-White Hlau) tus qauv.
Kev tshuaj xyuas:Txheeb xyuas qhov huv thiab qhov profile.
Daim ntawv thov:Siv cov khoom sib xyaw, ob-cov khoom siv epoxy los ntawm cov tshuaj tsis muaj pa kom ua tiav DFT tau teev tseg. Qhov no feem ntau ua nyob rau hauv ib puag ncig khw muag khoom rau cov kav dej tshiab.
Kho:Cia cov txheej txheem kho nyob rau hauv kev tswj kub thiab av noo.
Kev tshuaj xyuas & kuaj:
Tshawb xyuas qhov pom qhov tsis xws luag.
Ntsuas zaj duab xis qhuav Thickness.
Ua 100% Kev Tshawb Nrhiav Hnub So.
Kho:Txhua yam tsis xws luag lossis hnub so raug kho los ntawm kev pom zoo thiab cov khoom siv.
Qhov zoo ntawm AWWA C210 Txheej Systems
Zoo heev Adhesion thiab Durability
Superior Chemical thiab Corrosion Resistance
Smooth sab hauv tiav, txhim kho ntws (C-factor)
Abrasion Resistant
Tau tshaj Cathodic Protection
NSF / ANSI 61 Certified rau cov dej haus
Kev txwv / kev txiav txim siab
Kev npaj nto yog qhov tseem ceeb thiab kim.
Daim ntawv thov yog rhiab heev rau ambient tej yam kev mob(temperature, humidity, dew point).
Muaj tsawg lub neej lauj kaub(lub sijhawm ua haujlwm tom qab ob lub ntsiab lus sib xyaw).
Yuav tsum muaj Recoat Qhov rai;yog tias tsis tau, qhov saum npoo yuav xav tau rov- blasting.
Xaus
AWWA C210 yog tus qauv ntsuas ntsuas rau siab -kev ua tau zoo, kua epoxy txheej hauv kev lag luam xa dej.Nws muab lub hauv paus ruaj khov rau kev xaiv cov khoom siv, daim ntawv thov, thiab kev tshuaj xyuas, kom ntseeg tau tias cov kav hlau coated steel yuav muab ntau xyoo kev txhim khu kev qha, corrosion- pab dawb thaum tiv thaiv pej xeem kev noj qab haus huv thiab dej zoo.
Tsis lees paub:Nov yog cov ntsiab lus qhia. Txhawm rau ua kom tiav cov ntsiab lus, cov kev xav tau meej, thiab cov hom phiaj kev cog lus, cov ntawv sau tag nrho ntawm qhovAWWA C210-21txheem yuav tsum tau yuav thiab hais ncaj qha los ntawm lubAmerican Water Works Association.
