Yas lwj tau tsim thawj xyoo thaum xyoo 1950 thiab tau nce zuj zus tuaj yav dhau los 20 xyoo. Tau tsim thiab ntim yas ntim yas, ob-ntsa yas yas, raws li cov khoom siv zom zawg, yuav muab faib ua "HDPE duav", "UPVC lwj", "PP dais" thiab hais txog, uas cov yas PVC yas tua tam sim no qhov loj
Cov yeeb nkab plhuaj rau hauv cov qauv tsim uas siv cov nplhaib tshwj xeeb "nplhaib qhov chaw" zoo li "cross-section", cov yeeb yaj kiab tsim, qhov tsim nyog tsim, rhuav tshem cov yeeb nkab "plate" ntawm cov qauv kev cai, kom lub pipeline muaj txaus siab thiab qhov feem zog , ob chav yas, thaum coj zoo elasticity. Raws li lub qauv ntawm yas lwj, lub bellows yuav muab faib ua ib leeg-phab corrugated yeeb thiab ob-walled lwj. Phab ntsa yas ntsa yas yog hauv plawv yas sab hauv thiab sab nraum lub hnab yas yeeb nkab, yog ib lub sib ntswg, muab ob npaug rau phab ntsa yas, siab rigidity, tuaj yeem, ntim cov khoom ntim. Ob chav phab ntsa corrugated yeeb nkab xa mus rau phab ntsa ntawm phab ntsa, cov phab ntsa txheej ntawm corrugated (corrugated zoo yuav yog cai kaum lub trapezoidal, sine, etc.) ntawm lub raj yas, nws yog los ntawm corrugated txheej phab ntsa thaum muab zawm thiab sintering qhov kev ruaj ntseg hauv plhaub sab hauv kev ntxiv sab nraud rau cov yas zoo tib yam Cov kev xeb hauv corrosion yog qhov zoo, siab rwb thaiv tsev, ob chav phab ntsa yas phab ntsa du, me me tsis txaus thiab lwm yam ntxwv vim kev siv lub nplhaib tshwj xeeb lub nplhaib nruj thiab zoo zog thiab muaj zog. Ntawm kev sib tw thiab kev sib zog, kev siv ob npaug rau sab hauv yog 30% mus rau 50% tsawg dua cov kav hlau yas zoo, nrog rau kev siv technology thiab kev lag luam, yooj yim ntawm kev thauj thiab kev kho, txo cov neeg ua haujlwm cov neeg ua haujlwm, tiam sis txo tag nrho peev hauv engineering, tab sis Lub curvature yog heev me me. Cov ntaub ntawv ntawm cov yeeb nkab tau tsim: cov hlua khuam ib leeg ntawm cov yeeb nkab yuav siv dav hauv cov kev kawm golf, cov kev ua si hauv av thiab lwm yam teeb meem kua qaub, permeable; sab hauv tshauv sab hauv; tsheb trough; prestressed thauj tog rau nkoj; ob chav phab ntsa corrugated yeeb nkab yuav dav siv txoj kev, qhov chaw siab, golf cov hoob kawm thiab lwm yam kev mob hnyav, kua dej, dej nyab, thiab lwm yam; cov dej phwj hauv nroog; kev sib txuas lus, lub hwj huam mov kab hlau thaiv thiab lwm zaus
