Hauv ntiaj teb ntawmyeeb nkab hlaukev tsim khoom, qhov tseeb tsis yog lub hom phiaj xwb - nws yog qhov yuav tsum tau ua raws li txoj cai thiab kev nyab xeeb. Txawm hais tias koj tab tom khiav lub Hoobkas hauv Southeast Asia lossis nrhiav cov kav dej rau ib qhov project hauv North America, koj ib txwm seev cev ntawm ob lub ntiaj teb: lub kaw lus metric thiab lub kaw lus imperial.
Kev hloov pauv "ze txaus" yuav ua haujlwm rau lub laj kab tom qab tsev, tab sis thaum koj tab tom cuam tshuam nrogAPIlossis ASTM cov qauv, yog tias ua tsis tiav ob peb feem txhiab ntawm ib nti tuaj yeem ua rau cov yeeb nkab puas tsuaj loj heev, cov khoom xa tuaj tsis raug, lossis cov xov uas yuav tsis zaum. Qhov no yog qhov uas daim ntawv qhia hloov millimeters mus rau nti txhim khu kev qha tau dhau los ua cov cuab yeej tseem ceeb tshaj plaws hauv koj lub khw.
Tus Txheej Txheem: Vim li cas 25.4 yog Tus lej khawv koob
Hauv kev tsim cov yeeb nkab, txhua yam tig ib ncig ntawm Sab Nraud Txoj Kab uas hla (OD) thiab Phab Ntsa Thickness (WT). Txawm hais tias feem ntau ntawm lub ntiaj teb siv millimeters, kev lag luam hauv Tebchaws Meskas tseem xav tau txhua yam hauv decimal inches thiab cov yeeb nkab "sijhawm."
Tus choj txheem kev lag luam yog raws nraim25.4.
Metric rau Imperial:hli/ 25.4 = nti
Imperial mus rau Metric:nti x 25.4 = hli
Yog tias koj nyob hauv pem teb Hoobkas thiab xav tau hloov pauv1.4mm mus rau ntirau ib qholub raj xa dej nyias nyias, lej muab rau koj 0.055118". Hauv qhov chaw tsim khoom, peb feem ntau txiav qhov no mus rau plaub qhov chaw lej: 0.0551". Tus lej me me ntawd yog qhov sib txawv ntawm cov khoom zoo thiab "ob."
Lub Rooj Sib Hloov Siab: Nti-hli Decimal
Rau cov yeeb nkab hlau, peb feem ntau tsis siv cov feem xws li 1/8" lossis 3/16". Cov kws kho tshuab thiab cov neeg soj ntsuam QC xav tau lub rooj hloov pauv nti mm-decimal. Cov feem tsis meej dhau rau CNC yeeb nkab threading lossis ultrasonic thickness testing.
Kev Kawm Txog 1.4mm: Vim Li Cas Decimal Thiaj Tseem Ceeb
Tej zaum koj yuav xav tsis thoob tias vim li cas ib lub chaw tsim khoom yuav tshwj xeeb saib xyuas txog 1.4 hli txog nti. Hauv kev tsim khoom ntawmERW cov kav hlau, 1.4 hli yog ib qho "qhov chaw qab zib" uas siv ntau heev rau cov qauv siv sib txawv, xws li cov thav rooj tog lossis cov khoom siv tso pa tawm hauv tsheb.
Yog tias koj tus neeg siv khoom daim ntawv qhia xav kom phab ntsa tuab li 0.055" thiab koj lub Hoobkas teeb tsa los tsim 1.4 hli, koj tab tom muab 0.0551". Ntawm ib lub yeeb nkab, qhov sib txawv 0.0001" ntawd tsis pom. Tab sis yog tias koj xa 50,000 feet ntawm cov yeeb nkab, qhov tuab ntxiv ntawd ntxiv qhov hnyav rau tag nrho cov xaj. Vim tias hlau feem ntau muag los ntawm qhov hnyav, kev hloov pauv tsis raug tuaj yeem rhuav tshem koj cov nqi thauj khoom thiab koj cov nyiaj tau los.
Phab ntsa Thickness thiab "Gauge" Kev Tsis Txaus Siab
Hauv ntiaj teb cov yeeb nkab hlau, daim ntawv qhia hloov millimeters mus rau nti feem ntau nyuaj los ntawm "Gauge" system. Cov yeeb nkab "14-gauge" tsis zoo ib yam txhua qhov chaw.
Hauv Tebchaws Meskas, 14-gauge hlau feem ntau suav tias yog 0.0747 ".
Txawm li cas los xij, ntau lub Hoobkas thoob ntiaj teb yuav muab cov yeeb nkab 2.0 hli los hloov, uas yog qhov tseeb 0.0787 ".
Yog tias koj vam khom lub npe zoo li "14-gauge" es tsis yog kev hloov pauv decimal, koj xaus nrog cov kav dej uas tsis haum rau cov couplings lossis connectors txheem siv hauv daim teb. Qhov no yog vim li cas cov khoom lag luam niaj hnub no txav deb ntawm cov npe gauge thiab mus rau cov lus qhia nruj mm-rau-decimal-inch.
Kev kam rau siab: Lub ntxiab zais cia
Hauv kev tsim khoom, tsis muaj yeeb nkab twg zoo tag nrho 1.4 hli. Yeej ib txwm muaj "kev kam rau siab" - feem ntau +/- 10%.
Yog tias koj hloov 1.4mm mus rau 0.055 nti, tab sis koj cov kab ntau lawm poob rau 1.35mm, koj qhov tuab tiag tiag tam sim no yog 0.0531 nti.
Yog tias cov lus qhia ntawm qhov project xav tau tsawg kawg yog 0.054 nti, tag nrho koj cov khoom yuav raug tsis lees txais. Thaum siv lub rooj hloov pauv nti mm-decimal, ib txwm suav nrog qhov ntau thiab tsawg ntawm koj lub tshuab zeb. Tsis txhob tsuas yog hloov tus lej lub hom phiaj xwb; hloov koj cov lej "hauv pem teb" thiab "qab nthab" kom ntseeg tau tias koj nyob hauv tus neeg siv khoom cov lus qhia.
Lub sijhawm tshaj tawm: Lub Ob Hlis-03-2026
