Koj puas to taub qhov txawv ntawm txoj kab uas hla De, DN, D, d, thiab Φ?
Cov kav dej tau pom txhua hnub, thiab txoj kab uas hla ntawm cov kav dej feem ntau hais, tab sis Dn, De, D, d, thiab Φ yuav tsum muab tso ua ke... Piv txwv li:
DN200, De200, D200, d200, Φ200
Tsis meej pem? Thov qhia rau kuv paub tias koj yog ib tug scumbag.
Feem ntau hais lus, txoj kab uas hla ntawm cov yeeb nkab tuaj yeem muab faib ua txoj kab nruab nrab (De), sab hauv (D), thiab lub taub nominal (DN). Cia peb qhia txhua tus qhov txawv ntawm cov "DDDD..."
DN yog hais txog lub nominal txoj kab uas hla ntawm cov yeeb nkab
Lus Cim: Qhov no tsis yog lub taub sab nraud lossis sab hauv txoj kab uas hla, nws yog qhov nruab nrab ntawm txoj kab uas hla sab nraud thiab sab hauv, hu ua qhov nruab nrab sab hauv txoj kab uas hla.
Thaum tus tsim siv lub nominal txoj kab uas hla DN los sawv cev rau cov yeeb nkab txoj kab uas hla, yuav tsum muaj ib tug sib piv rooj ntawm nominal txoj kab uas hla DN thiab cov khoom specifications.
Cov khoom siv yeeb nkab xws li cov kav dej xa hluav taws xob (galvanized steel kav lossis cov kav hlau tsis-galvanized), cam khwb cia hlau kav, steel-yas composite kav thiab polyvinyl chloride (PVC) kav yuav tsum tau cim nrog lub nominal txoj kab uas hla "DN" (xws li DN15, DN20)
De mas yog hais txog lub sab nraud ntawm cov yeeb nkab
Feem ntau, cov cim nrog De yuav tsum tau cim nyob rau hauv daim ntawv ntawm txoj kab uas hla×phab ntsa thickness;
Feem ntau yog siv los piav qhia: seamless steel kav, cov kav dej yas xws li PVC, thiab lwm cov kav dej uas xav tau cov phab ntsa ntshiab.
Noj galvanized welded steel yeeb nkab ua piv txwv, ob txoj kev kos npe ntawm DN thiab De yog raws li hauv qab no:
DN20 De25 × 2.5mm
DN25 De32 × 3mm
DN32 De40 × 4mm
DN40 De 50 × 4mm
Peb nquag siv DN los kos cov welded steel kav, thiab tsis tshua siv De los kos cov kav dej thaum phab ntsa thickness tsis cuam tshuam; tab sis kos cov kav dej yas yog lwm qhov teeb meem; nws tseem muaj feem xyuam rau kev lag luam tus cwj pwm, hauv kev tsim kho tiag tiag Lub 20, 25, 32 thiab lwm cov kav dej uas peb tsuas yog hu rau txhua tus xa mus rau De, tsis yog DN. Muaj qhov txawv ntawm no. Nws yog ib qho yooj yim uas yuav ua rau poob hauv cov txheej txheem ntawm kev yuav khoom thiab kev tsim kho yog tias nws tsis meej.
Txoj kev sib txuas ntawm ob lub raj xa dej yog tsis muaj dab tsi ntau tshaj li cov ntsia hlau txuas thiab flange txuas. Lwm txoj kev sib txuas tsis tshua siv.
Ob qho tib si galvanized steel kav thiab PPR cov kav dej tuaj yeem txuas tau los ntawm ob qhov kev sib txuas saum toj no, tab sis nws yooj yim dua los siv cov xov rau cov kav dej me dua 50, thiab flanges rau cov kav dej loj dua 50 yog ntau txhim khu kev qha.
Lus Cim: Yog tias ob lub kav hlau ntawm cov khoom sib txawv txuas nrog, nws yuav tsum tau txiav txim siab seb puas yuav muaj cov tshuaj tiv thaiv galvanic, txwv tsis pub tus nqi corrosion ntawm cov kav hlau ua haujlwm yuav nrawm dua. Nws yog qhov zoo tshaj plaws los siv cov flange sib txuas, thiab siv cov ntaub ntawv insulating xws li roj hmab gaskets. Txhua hom hlau yog sib cais, suav nrog bolts, uas yuav tsum tau muab cais los ntawm gaskets kom tsis txhob muaj kev sib cuag.
D feem ntau yog hais txog lub puab txoj kab uas hla ntawm cov yeeb nkab
d yog lub puab txoj kab uas hla ntawm lub pob zeb ua yeeb nkab
Φ sawv cev txoj kab uas hla ntawm lub voj voog zoo tib yam
Φ tuaj yeem sawv cev rau sab nraud ntawm cov yeeb nkab, tab sis lub sijhawm no nws yuav tsum tau muab faib ua phab ntsa tuab.
Xws li: Φ25 × 3, nws txhais tau hais tias cov yeeb nkab nrog lub taub sab nraud ntawm 25 hli thiab phab ntsa tuab ntawm 3 hli.
Rau cov kav dej seamless steel lossis cov kav hlau tsis muaj hlau, "sab nraud x phab ntsa thickness" yuav tsum raug cim.
Xws li: Φ107 × 4, uas Φ tuaj yeem raug tshem tawm.
Qee cov yeeb nkab steel hauv Suav teb, ISO thiab Nyij Pooj tau cim nrog phab ntsa tuab qhov ntev los qhia cov yeeb nkab phab ntsa thickness series. Rau cov yeeb nkab steel hom no, txoj kev qhia yog qhov sab nraud ntawm cov yeeb nkab × phab ntsa thickness.
Xws li: Φ60.5 × 3.8
Tus sawv cev sib txawv ntawm De, DN, d, thiab ф.
De-- PPR, PE yeeb nkab, polypropylene yeeb nkab sab nraud
DN --Nominal txoj kab uas hla ntawm polyethylene (PVC) yeeb nkab, cam khwb cia hlau yeeb nkab, steel-yas composite yeeb nkab, galvanized steel yeeb nkab
d -- Nominal txoj kab uas hla ntawm qhob yeeb nkab
ф-- Seamless steel kav lossis cov kav hlau tsis muaj hlau yuav tsum tau cim nrog "txoj kab uas hla × phab ntsa thickness"
