Nyob rau hauv cov yeeb nkab fittings li qub twj tso kua mis thiab lwm yam kev tsim los yog kev yuav khoom peb feem ntau ntsib DN, ntiv tes ", Φ thiab lwm yam units, muaj ntau tus phooj ywg (tshwj xeeb tshaj yog muaj ntau yam tshiab rau kev lag luam khau) rau qhov tsis meej pem, tsis tuaj yeem paub qhov txawv ntawm cov qauv, niaj hnub no peb yuav sau cov ntsiab lus ntawm peb lub koog tsev kawm ntawv cov kev txheeb xyuas tshwj xeeb.
1. DN
"DN" ntau tus phooj ywg yuam kev xav tias yog lub puab kab uas hla, qhov tseeb DN thiab sab hauv txoj kab uas hla ntawm ib co nyob ze, tab sis tsuas yog nyob ze, nws lub ntsiab lus tseeb yog lub raj xa dej, yeeb nkab, fittings nominal txoj kab uas hla, nominal txoj kab uas hla (Nominal Diameter), los yog hu ua lub Qhov nruab nrab sab nraud txoj kab uas hla (Mean Outside Diameter), qhov tseeb, yuav luag yog qhov nruab nrab sab nraud.
Nyob rau hauv lub domestic DN tus nqi yog qhov yooj yim heev, tab sis nyob rau hauv cov kav dej, yeeb nkab thiab valve fittings tsuas yog sawv cev ib feem, vim li cas yog ib feem ntawm nws?Vim hais tias nyob rau hauv domestic pipeline system, muaj peev xwm muaj ob hom sab nraud txoj kab uas hla nyob rau hauv tib DN cim yeeb nkab (Φ yog sab nraud txoj kab uas hla ntawm cov yeeb nkab los yog pipeline, peb yuav piav qhia tom qab), xws li DN100, muaj I series thiab II series (tseem. muaj txiaj ntsig los cim A series thiab B series), Kuv series thiab A series ntawm DN100 yog Φ114.3, thaum II series thiab B series ntawm DN100 yog Φ108.Yog tias koj tsis qhia txog sab nraud ntawm cov yeeb nkab Φ tom qab DN thaum nthuav qhia cov phiaj xwm thiab cov ntsiab lus, koj yuav tsum ua kom pom tseeb tias nws yog I series (A series) lossis II series (B series) thaum kos npe nrog DN, kom nws yog qhov tseeb nyob rau hauv cov txheej txheem ntawm kev yuav khoom thiab nug, thiab koj tuaj yeem paub cov yeeb nkab zoo li cas lossis haum rau sab nraud txoj kab uas koj xav tau yam tsis muaj kev sib txuas lus thiab kev pom zoo.
2. Ntiv
Ntiv" yog ib chav tsev imperial, feem ntau yog siv nyob rau hauv America thiab Europe, kuj yog ib chav tsev, ntawm chav kawm, nws muaj yeeb nkab thiab Tube yeeb nkab, hnub no peb yuav tsum tau piav qhia txog cov yeeb nkab chav kawm ntawv ntawm cov kav dej thiab fittings, tom qab ntawd yuav ua kom paub, Cov yeeb nkab yeeb nkab thiab Tube. yeeb nkab kev sib txawv.
Nyob rau hauv cov yeeb nkab yeeb nkab, nti tsis zoo li DN chav tsev kom paub qhov txawv ntawm sab nraud ntawm ob hom kav dej, nws yog ib chav tsev ntshiab, xws li 4 ″ kom meej meej taw qhia yog sab nraud txoj kab uas hla 114.3, thiab 10 ″ yog Φ273, ntev li ntev tau. cov yeeb nkab lossis fittings tau piav qhia los ntawm nti tuaj yeem paub meej yam tsis muaj kev lees paub ntawm qhov xav tau cov yeeb nkab sab nraud loj.
3. Txoj kab uas hla Φ
Lub cim ntawm txoj kab uas hla yog "Φ", uas belongs rau ib tsab ntawv Greek, hais tias "fai", thiab nws muaj kev sib raug zoo nrog ob qho dhau los, vim tias nws tuaj yeem hloov qhov saum toj no ob lub cim qhia, thiab cov kav dej lossis cov yeeb nkab siv Φ. yog qhov tseeb tshaj plaws, thiab nws yog qhov ncaj tshaj plaws yam tsis muaj kev hloov pauv, xws li Φ219, Φ508, Φ1020, thiab lwm yam. Qhov kev txheeb xyuas no kuj yog ib qho uas nws kim heev.
Post lub sij hawm: Mar-24-2023
