Raws li tus qauv EN545, kev sim siabcov yeeb nkab hlau ductileyuav tsum tau ua tiav rau txhua qhov fittings ua ntej daim ntawv thov ntawm lawv cov txheej sab nraud thiab sab hauv, tshwj tsis yog cov xim zinc hlau ntawm cov kav dej uas yuav siv tau ua ntej qhov kev sim, Tsis muaj qhov xau lossis hws yuav tsum tau pom thaum lub sijhawm sim.
Lus Cim: Lub zog hydrostatic ua haujlwm tsawg dua rau cov khoom siv dua li cov yeeb nkab vim tias cov duab ntawm cov khoom siv ua rau nws nyuaj rau muab kev txwv txaus rau lub zog siab sab hauv thaum lub sijhawm sim.
Yuav kom nkag siab tag nrho EN545 txoj kev tswj hwm qhov xau nruj, peb yuav tsum tshuaj xyuas peb lub ntsiab lus tseem ceeb: PEA, PMA, thiab PFA. Ua ke, lawv yog ib lub kaw lus tshawb fawb rau kev soj ntsuam thiab xyuas kom meej tias cov kav dej xau nruj.
1. PEA - Kev Ua Haujlwm Siab Uas Tso Cai
Qhov no hais txog qhov siab tshaj plaws uas tso cai rau sab hauv lub raj xa dej ntawm nws qhov kub ua haujlwm siab tshaj plaws, ua kom muaj kev ua haujlwm ntev, muaj kev nyab xeeb, thiab ruaj khov.
PEA = PMA + 5bar
2. PMA - Qhov Siab Tshaj Plaws Ua Haujlwm Tso Cai
Qhov no yog hais txog qhov siab tshaj plaws sab hauv uas lub kaw lus kav dej tuaj yeem tiv taus tau ntawm qhov kub thiab txias hauv chav tsev, suav nrog qhov siab nce siab.
PMA=PFA*1.2
3. PFA - Kev Ntsuas Siab Uas Tso Cai
Qhov no hais txog qhov siab tshaj plaws uas cov kav dej tuaj yeem tiv taus tau hauv lub sijhawm luv luv tom qab kev teeb tsa thiab ua ntej kev ua haujlwm.
PFA = (20 xe)feebx Rm) / D x SF
- Siv cov yeeb nkab k9 ductile ua piv txwv, efeebyog qhov tsawg kawg nkaus phab ntsa tuab ntawm cov yeeb nkab, mm.
- Rmyog lub zog tensile tsawg kawg nkaus, N/mm².
- D yog qhov nruab nrab txoj kab uas hla ntawm cov yeeb nkab, mm.
- SFyog qhov kev nyab xeeb.
k9 yeeb nkab hlau ductile, chav kawm k9 yeeb nkab hlau ductile, kev sim siab yeeb nkab hlau ductile,
Lub sijhawm tshaj tawm: Lub Kaum Hli-14-2025
