Muaj feem ntau cov phooj ywg uas tsis nkag siab txog kev sib raug zoo ntawm cov ntsiab lus ntawm "DN", "Φ"thiab """. Hnub no, kuv yuav qhia txog kev sib raug zoo ntawm peb rau koj, vam tias yuav pab tau koj!
dab tsi yog ib nti”
Inch (") yog ib qho kev qhia tshwj xeeb hauv Asmeskas, xws li cov kav hlau,li qub, flanges, luj tshib, twj, tees, thiab lwm yam, xws li cov specification yog 10 ".
Ntiv (inch, abbreviated as in.) txhais tau tias tus ntiv tes xoo hauv Dutch, thiab ib nti yog qhov ntev ntawm tus ntiv tes xoo. Tau kawg, qhov ntev ntawm tus ntiv tes xoo kuj txawv. Nyob rau hauv lub xyoo pua 14th, King Edward II tau tshaj tawm "Standard Legal Inch". Cov kev cai yog tias qhov ntev ntawm peb cov nplej loj tshaj plaws xaiv los ntawm nruab nrab ntawm cov pob ntseg barley thiab teem ua ke yog ib nti.
Feem ntau 1 "= 2.54cm = 25.4mm
DN yog dab tsi
DN yog ib qho kev qhia tshwj xeeb uas siv nyob rau hauv Tuam Tshoj thiab European tshuab, thiab nws kuj yog cov specification rau cov kav dej,li qub, flanges, fittings, thiab twj tso kua mis, xws liDN 250.
DN yog hais txog lub nominal txoj kab uas hla ntawm cov yeeb nkab (tseem hu ua lub nominal txoj kab uas hla), ceeb toom: qhov no tsis yog lub sab txoj kab uas hla los yog lub puab txoj kab uas hla, tab sis qhov nruab nrab ntawm lub sab nraud txoj kab uas hla thiab puab txoj kab uas hla, hu ua qhov nruab nrab sab hauv txoj kab uas hla.
Dab tsi yogΦ
Φ yog ib qho kev sib koom ua ke, uas yog hais txog sab nraud ntawm cov kav dej, lossis lub luj tshib, puag ncig steel thiab lwm yam khoom siv.
Yog li dab tsi yog qhov kev sib txuas ntawm lawv?
Ua ntej tshaj plaws, lub ntsiab lus cim los ntawm """ thiab "DN" yuav luag tib yam.Φ yog qhov sib xyaw ntawm ob.
piv txwv
Piv txwv li, yog tias cov yeeb nkab steel yog DN600, yog tias tib lub yeeb nkab steel raug cim hauv ntiv tes, nws dhau los ua 24 ". Puas muaj kev sib txuas ntawm ob?
Cov lus teb yog yog! Cov ntiv tes dav dav yog tus lej thiab ncaj qha muab faib los ntawm 25 sib npaug DN, xws li 1 "* 25 = DN25, 2" * 25 = 50, 4 "* 25 = DN100, thiab lwm yam. Tau kawg, muaj ntau qhov sib txawv xws li 3 " * 25 = 75 Rounding yog DN80, thiab muaj qee qhov ntiv tes nrog cov lej cim lossis cov lej lej xws li 1/2 ", 3/4", 1-1/4 ", 1-1/2", 2-1/2 " , 3-1 / 2 ″ thiab lwm yam, cov no tsis tuaj yeem suav tau zoo li ntawd, tab sis kev suav yog kwv yees li qub, feem ntau tus nqi teev:
1/2″ = DN15
3/4″ = DN20
1-1/4″ = DN32
1-1/2″ = DN40
2″ = DN50
2-1/2″ = DN65
3" = DN80
Post lub sij hawm: Feb-03-2023
