Lub semiconductor fab nyob rau sab hnub tuaj Asia xav tau los sib sau ua ke tsib cov txheej txheem sib cais nqa 2000 ppm HF pov tseg rau hauv ib qho ua ntej -kev kho mob- ua haujlwm siab ntawm 6 bar, routing hla lub ru tsev, cable tais, thiab kev teeb tsa ntawm txoj kev. Qhov kev txiav txim siab ntawm cov khoom siv los ntawm corrosion lifecycle, tsis yog thawj tus nqi. Qhov project yog hom kev sib tham tshwj xeeb qhov twgHDPE tubingob qho tib si haum los yog tsis, thiab qhov kev txiav txim siab tsis tshua pom tseeb los ntawm tus qauv khoom catalog.
Qhov twg HDPE ua rau kev nkag siab-thiab qhov twg nws tsis
Qhov kev thov tias HDPE raug nqi 18-35% tsawg dua cov hlau tshaj li 30-xyoo lub neej tshwm sim ntau zaus hauv kev lag luam cov ntaub ntawv. Qhov ntau yog qhov dav heev vim nws nyob ntawm koj qhov kev sib xyaw ua ke ntawm cov yeeb nkab txoj kab uas hla, kev khiav hauj lwm siab, tshuaj raug, thiab txoj kev teeb tsa. Ib txoj kab 160mm SDR11 tuav dilute sulfuric acid nyob rau hauv ib qho trenchless installation yuav qhia tau ntau yam kev lag luam ntau dua li 50mm lub ntiajteb txawj nqus ntws ntws hauv qhov qhib trench.
Peb tau khiav cov qauv nqi sab hauv ntawm cov haujlwm xws li cov kab hluav taws xob cov nroj tsuag pov tseg rau hauv cov dej hauv nroog. Qhov kev tshawb pom tsis tu ncua tsis yog feem pua -nws yog tus qauv: HDPE ua haujlwm zoo dua thaum cov nqi tiv thaiv corrosion ua rau cov hlau lwm txoj hauv kev, thiab ua haujlwm tsis zoo thaum ua haujlwm kub siab tshaj 60℃tsis tu ncua. Yog tias koj cov txheej txheem ua kua dej kub, lub siab derating ntawm polyethylene dhau los ua qhov kev tswj hwm, thiab "cov nqi txuag" lej inverts.
Rau tej yaam num uas kub nyob rau hauv ntau yam, lub installation nqi sib txawv feem ntau tshaj cov khoom nqi sib txawv. Thaum tshav kub kub- fused pob qij txha tshem tawm thrust blocks. Tsis muaj kev tiv thaiv cathodic. Tsis tau teem caij recoating. Tab sis cov nyiaj khaws cia no tsuas yog ua tiav yog tias tus neeg teeb tsa tuav tau zoo DVS 2207 lossis AWS G1.10 ntawv pov thawj- txwv tsis pub koj tab tom ua lag luam teeb meem corrosion rau fusion sib koom ua tsis tiav, uas nyuaj rau kev kuaj xyuas thiab kho kim dua.
Chemical Resistance: Txoj Kev Ciam Teb
HDPE tiv taus feem ntau cov ntxhia acids, alkalis, thiab ntsev daws ntawm ob qho tib si ambient thiab nruab nrab qhov kub thiab txias -phosphoric acid mus rau 95%, dilute sulfuric, sodium chloride brines. Qhov no tau sau tseg hauv ISO TR 10358 thiab cov ntaub ntawv xa khoom los ntawm cov neeg tsim khoom zoo li LyondellBasell thiab Borealis.
Hom kev ua tsis tiav uas ntes cov phiaj xwm tawm tsam tsis yog tshuaj tua kab ncaj qha. Nws yog ib puag ncig kev ntxhov siab tawg nyob rau hauv cov khoom siv sib xyaw ua ke thiab tshwj xeeb hydrocarbon raug. Cov txheej txheem tau sau tseg hauv ASTM D1693 thiab ISO 16770, tab sis cov lus nug siv tau yog ib txwm: qhov twg hydrocarbon ua ke ua rau nws nyob ntawm qhov siab thiab kub npaum li cas?
PE100-RC qib(tsis kam ua kom tawg tawm) qhia tau tias muaj kev ua tau zoo dua hauv kev ntsuas kev tawg qeeb qeeb piv rau tus qauv PE100-qhov sib txawv uas muaj teeb meem thaum koj tab tom teev rau 25+ xyoo kev pabcuam hauv thaj chaw tshuaj lom neeg. Yog tias koj cov kua dej muaj cov tshuaj tsw qab hydrocarbons lossis cov kuab tshuaj chlorinated, cov phab ntsa tuab yuav tsum suav nrog qhov no, tsis yog kev ua haujlwm siab xwb. Peb tuaj yeem khiav qhov tshwj xeeb tshuaj xyuas kev sib raug zoo tiv thaiv koj cov txheej txheem yog tias koj xa cov ntawv xov xwm.
Extrusion Zoo: Dab tsi cais cov neeg muab khoom
Cov qib resin tseem ceeb tsawg dua li pawg neeg yuav khoom feem ntau xav tias -PE4710 los ntawm cov khoom sib txawv sib txawv yog cov tshuaj zoo sib xws. Qhov sib txawv tshwm sim hauv cov txheej txheem extrusion tswj.
Loj - cov kav dej ntev tshaj 75 hli phab ntsa tuab lub ntsej muag "sag" thaum lub caij txias -lub ntiajteb txawj nqus rub cov molten polymer downwards ua ntej solidification, tsim thickness variance ntawm sab saum toj thiab hauv qab phab ntsa. Cov neeg siv khoom siv bimodal qis-sag PE100 formulations thiab precision tuag offset tswj tau ua kom nruj dua; lwm tus them nyiaj ntau dua - qhia txog phab ntsa thickness los ntawm 8-12%, thiab koj them rau cov khoom ntxiv ntawd.
Lub sijhawm crystallization cuam tshuam rau cov khoom siv kho tshuab. Feem ntau crystallization tshwm sim thaum lub sij hawm pib txias, tab sis qhov seem stability tseem tab tom txhim kho ntau lub lis piam. Rau siab- daim ntawv thov ntsuas, cov khoom uas tau muab khaws cia 30+ hnub tom qab-extrusion coj tau kwv yees ntau dua li cov khoom tshiab. Qhov no yog cov lus qhia tshwj xeeb tsim nyog tham nrog koj tus neeg muag khoom yog tias koj lub sijhawm teem sijhawm nruj.
Yam Uas Tsim Nyog Muaj Peev Xwm Ua Tau tiag tiag
Nug seb tus neeg muag khoom puas "tso tswj kev ua haujlwm zoo ntawm kev sib koom ua ke" zoo li nug seb lawv puas muaj tus lej xov tooj. Cov lus nug uas qhia txog kev muaj peev xwm yog qhov tshwj xeeb:
Lawv puas tuav ISO 4427 lossis ASTM D3035 thib peb- daim ntawv pov thawj kev sib raug zoo, tsis yog tus kheej nkaus xwb- tshaj tawm? Lawv puas tuaj yeem muab batch-theem MFI (melt flow index) cov ntaub ntawv sib xws los ntawm rau lub hlis dhau los? Dab tsi yog lawv OIT (lub sijhawm oxidative induction) cov txiaj ntsig kev faib tawm thoob plaws kev tsim khoom? Rau cov welded sib dhos: cov txheej txheem vuam qhov twg lawv tsim nyog raws li -DVS 2207-1, AWS G1.10, lossis sib npaug?
Yog tias koj xav tau, peb tuaj yeem xa peb cov qauv kev kuaj xyuas cov lus nug rau koj raws li lub hauv paus pib. Nws yog tib cov ntaub ntawv uas peb siv los tsim nyog peb tus kheej cov khoom siv hluav taws xob.
Kev Cai Extrusion: ncua sij hawm thiab txwv
Txheem profilesnpog feem ntau cov ntawv thov kev lag luam. Cov kev cai tshwj xeeb- tshwj xeeb OD/ID rau cov txheej txheem qub qub,co-extruded identification kab txaij.
Yam tsawg kawg nkaus txiav txim rau kev cai profiles feem ntau pib ntawm 500-1000 meters nyob ntawm txoj kab uas hla. Kev khiav me me tuaj yeem ua tau ntawm tus nqi hwm. Rau cov ntawv pov thawj zoo li NSF 61 rau kev sib cuag dej, ntxiv 2-3 lub lis piam rau cov ntaub ntawv.
Kauj ruam tom ntej
Peb tsim HDPE tubing thiabkev cai extrusion profilesntawm peb qhov chaw Dongguan- muaj peev xwm rau ob qho tib si kev khiav haujlwm thiab cov ntawv thov kev lag luam tshwj xeeb. Yog tias koj tab tom ntsuas HDPE rau kev tuav tshuaj lom neeg lossis cov kua dej hloov pauv, xa peb cov txheej txheem tshwj xeeb: xov xwm, qhov kub thiab txias, kev khiav hauj lwm siab, txoj kev teeb tsa, thiab cov ntawv pov thawj xav tau. Peb yuav xa rov qab cov ntaub ntawv tsim nyog nyob rau hauv 48 teev, suav nrog cov ntaub ntawv ua raws cai thiab cov nqi siv nyiaj rau koj qhov ntau.
Rau cov haujlwm uas xav tau kev tsim nyog sai, peb tuaj yeem muab: ISO 9001 daim ntawv pov thawj, batch- cov ntawv tshaj tawm qib (MFI, OIT, hydrostatic siab), thiab cov khoom siv coj mus kuaj rau koj tus kheej validation xeem.
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