Lub neej tiag tiag ntawm cov kav dej corrugated yog dab tsi?
Lub neej ntev ntawm cov kav dej corrugated txawv nyob ntawm cov khoom siv thiab qhov chaw siv. Hauv qab no yog cov ntaub ntawv tshaj lij rau cov hom kev lag luam tseem ceeb:
HDPE corrugated kav: Feem ntau 20-30 xyoo (xa mus rau ISO 4427 tus qauv), muaj zog tiv thaiv cov tshuaj corrosion, tab sis ntev raug rau lub hnub ci yuav luv lawv lub neej mus rau 10-15 xyoo.
PVC corrugated kav: Kwv yees li 10-15 xyoo (ASTM F679), zoo acid thiab alkali tsis kam, tab sis nws yuav ua rau embrittlement ntawm qhov kub thiab txias.
Hlau corrugated kav (stainless steel): Mus txog 30-50 xyoo (ASME B31.3), tab sis yuav tsum tau kev kho los tiv thaiv corrosion tsis tu ncua.
Nco tseg: Cov txiaj ntsig saum toj no yog cov txiaj ntsig kev xeem nyob rau hauv qhov chaw kuaj pom zoo. Hauv kev siv tiag tiag, lawv tuaj yeem hloov pauv los ntawm ± 20% vim yog yam xws li kev teeb tsa zoo thiab kev siv zog.
Yam dab tsi ua kom luv lub neej ntawm cov kav dej corrugated?
Environmental Factors:
UV hluav taws xob (ua kom cov yeeb nkab yas nrawm 3-5 zaug);
Kub kub (qis dua -30℃lossis siab dua 60 degree);
Av pH (corrosion rate doubles thaum pH <4 lossis> 9).
Mechanical Stress:
Ntev - siv lub sij hawm overpressure (ntau tshaj qhov tsim los ntawm 1.5 npaug);
Kev vibration tsis tu ncua lossis compression (xws li, faus rau hauv txoj kev).
Yuav Ua Li Cas Ntxiv Kev Pabcuam Lub Neej ntawm Corrugated Pipes?
Xaiv theem:
Nyob rau hauv ntug dej hiav txwv, 316L stainless hlau yog nyiam;
Rau kev tso hauv av, xaiv cov kav dej HDPE nrog cov txheej txheem tiv thaiv UV.
Installation thiab Maintenance:
Tsis txhob ntse- lub kaum sab xis khoov (tsawg kawg bending vojvoog Ntau dua lossis sib npaug li 8 npaug ntawm txoj kab uas hla);
Tshawb xyuas kev sib koom ua ke txhua xyoo (tshwj xeeb tshaj yog rau cov pa roj- cov kav dej corrugated).
Case Study: Tom qab lub tuam txhab tshuaj tau hloov mus rau ob npaug - txheej tiv thaiv - cov kav dej corrugated, lub neej kev pabcuam tau nce los ntawm 8 xyoo mus rau 22 xyoo (Cov ntaub ntawv qhov chaw: *Industrial Pipeline Engineering*, 2022, No. 4).
Pom zoo txoj kev xeem kev tshaj lij
Txhawm rau ntsuas qhov tseeb ntawm cov kav dej qub, thov saib cov hauv qab no:
Hydraulic test (GB/T 19647): Pressurize rau 1.5 npaug ntawm kev ua haujlwm siab thiab tuav rau 5 feeb yam tsis muaj dej;
Infrared spectroscopy tsom xam: Tshawb xyuas qhov kev tawg ntawm cov yas molecular chains.
Nco tseg: Cov kav dej corrugated uas tau tshaj lawv lub txee lub neej tab sis tau dhau qhov kev sim no tseem tuaj yeem txo qis rau kev siv (piv txwv li, hauv qhov tsis yog- cov dej ntws tawm).
