Hlab rau dej: daim ntawv thov thiab cov khoom

Dej thiab roj kav yog ib tug tshwj xeeb ntawm steel khoom, muaj ib tug cylindrical zoo thiab yog manufactured raws li cov qauv nyob rau hauv cov yeeb nkab mills.

Lawv muaj ib tug siab kuj mus txhua yam influences, muaj kev kawm siab thiab durability. Tau los mas ntev lub sij hawm ntawm tau raug dej thiab roj cua dhau los ntawm lawv. Nrog rau qhov no, gas kev hlab muaj ntau possibilities rau Vuam thiab dabtsi yog khoov. Tus nqi ntawm cov ntaub ntawv yog npaj meej muaj nyob.

Steel hlab rau dej no yog ua los ntawm siab zog, uas tsis muaj hlau los yog cov pa roj carbon steels. Lawv constituent chromium, manganese thiab lwm yam hais impart ntxiv cov khoom uas zoo - lub siab coj kuj, toughness, thiab kuj ua rau kom lawv vuam zog.

Nyob rau hauv tas li ntawd, niaj hnub technologies cia kom muaj xws li impurities rau hauv cov hlab ua los ntawm siab alloy steels. Siv ntxiv ua thiab tshwj xeeb txheej cov bituminous khoom thiab polymer coatings txhim khu lawv tsis kam mus txhoj puab heev media. Galvanizing ntaub ntawv muab ib tug txawm ntau dua lub zog raws li ib tug tshwm sim tau galvanized kav dej, uas muaj ib tug nce ceeb thawj.

Tubular khoom uas siv nyob rau hauv kev tsim kho ntawm cov pa roj pipelines thiab cov dej haus tshuab. Lawv yuav siv los tsim cov cua kub designs raws li zoo raws li rau zus tau tej cov roj thiab dej sib.

Welded cov hlab rau dej khiav lag luam nrog tws los yog knurled cylindrical threaded los yog tsis, nyob rau lub tshuaj nyob tus yeees thiab txhua yam khoom tsis caag. Los ntawm kev thov ntawm tus neeg muas zaub rau cov khoom nrog rau cov zaj uas ntau tshaj 10 hli xov yuav tsum muaj ntaub ntawv rau ob hnub. Nws yuav ua tau luv luv los yog ntev.

Lwm tus muaj enhanced leeg thiab yog electrofusion. Hlab rau dej yuav ua tau seem (4-12 meters), ntau yam seem ntev (nrog nyiaj nyob rau hauv xov) thiab lub off-gage.

Raug ntawm ntau lawm kav rau dej thiab steel khoom uas txwv kom muab zais rau hauv ib lub qub thiab paub tseeb.

Galvanized steel kav rau dej thiab muaj ib tug paub xeb kuj. Lawv yog ua los ntawm immersion nyob rau hauv ib tug zinc tov, thiab cov zinc coating yuav nyob rau hauv tus txheej nto ntawm lub hlau raj. Qhov txawv nyob rau hauv hnyav ntawm galvanized yeeb nkab nyob rau hauv kev sib piv nrog feem ntau nyob ib ncig ntawm peb feem pua.

Cov kav dej muaj ib tug tsau lub cheeb thiab uas yuav tsum tau ua nyob rau hauv cov kev xaiv ntawm cov khoom. Cov txheej inch tej zaum yuav txawv nyob ntawm seb lub phab ntsa thickness.

Dej thiab roj kav yog heev lub tsev cov ntaub ntawv uas, li cas los xij, muaj ib tug tseem ceeb drawback - lawv yog cov raug rau cov laus. Thaum lub sij hawm, cov khoom loses nws lub zog thiab elasticity. Ib tug lwm txoj rau steel kav yog cov khoom los ntawm polymeric ntaub ntawv los yog yas kav. Txawm li cas los, thaum lub sij hawm qhov kev siv ntawm muaj chaw hloov steel pipelines tsis muaj nyob.