1. Cov Qib Khoom Siv thiab Cov Qauv Kev Ua Tau Zoo
Stainless steel fittings yog qhov nyiam vim lawv tiv taus corrosion thiab muaj lub zog. Kev nkag siab txog cov qib khoom siv sib txawv yog thawj kauj ruam los xyuas kom qhov project tau sib haum xeeb.
304 / 304L Stainless Steel: Yog hom qib txheej txheem uas muaj ntau tshaj plaws, muaj kev tiv taus corrosion zoo rau tej qhov chaw dav dav. Nws yog siv dav hauv kev kho kom zoo nkauj ntawm tej tsev thiab kev thauj kav dej feem ntau. Raws li cov ntaub ntawv kev lag luam tsis ntev los no, 304 stainless cov kav dej nyias (thin-walled pipes) tsis pom muaj xeb loj hauv 3 xyoos kev sim sab nraum zoov, nrog lub zog tensile ntawm ≥520MPa.
316 / 316L Stainless Steel: Nrog kev ntxiv molybdenum, hom qib no muaj kev tiv taus zoo tshaj rau cov chlorides thiab tej chaw acidic. Nws yog qhov kev xaiv zoo tshaj plaws rau tej thaj chaw ntug hiav txwv, cov Hoobkas tshuaj, thiab cov tshuab dej purity siab. Piv txwv li, 316L fittings yog tshwj xeeb rau kev pom zoo rau cov tshuab cua sov kub qis hauv tej thaj chaw sab qaum teb vim lawv muaj kev tiv taus zoo rau kev corrosion kub qis.
Cov Khoom Siv Tshwj Xeeb (Special Alloys): Rau tej daim ntawv thov uas kub siab thiab siab, cov khoom siv tshwj xeeb xws li 20G, 16Mn, thiab 12Cr1MoV yog siv hauv tej haujlwm xws li petrochemical thiab hluav taws xob tiam.
2. Cov Hom Tseem Ceeb thiab Cov Txheej Txheem Kev Twb
Qhov kev ntseeg siab ntawm ib qho kav dej system feem ntau nyob ntawm txoj kev twb. Cov kev txhim kho niaj hnub tau hloov lub hom phiaj los ntawm kev vuam (welding) mus rau kev twb uas siv tshuab (mechanical connections) zoo dua.
A. Cov Hom Press-Fitting
Cov txheej txheem press-fitting tau hloov pauv qhov kev ceev thiab kev ntseeg siab ntawm kev txhim kho.
Cov Fittings Nias Ob Zaum (Double Press / Card Press): Siv cov cuab yeej hydraulic, lub fitting thiab lub kav yog kaw ua ke, tsim tau ib qho kev kaw (mechanical seal). Cov txheej txheem no tau raug pov thawj tias tiv taus 1.6MPa siab dej yam tsis muaj dej tso, ua rau nws zoo rau cov tshuab tua hluav taws siab.
Cov Fittings Nias Nplhaib (Ring Press Fittings): Siv cov txheej txheem cold extrusion, qhov kawg ntawm lub kav yog deformed kom nkag mus rau hauv lub groove sealing. Txoj kev no muab ib qho chaw sealing sib npaug nrog lub zog tiv thaiv rub (anti-pull force) tshaj 1500N, xyuas kom muaj kev ruaj ntseg mus sij hawm ntev.
B. Cov Fittings Muaj Qhov (Grooved Fittings)
Grooved fittings yog tus qauv rau cov kav dej loj. Lawv tshem tawm qhov kev xav tau ntawm kev vuam, yog li ntawd zam cov pa vuam thiab kev pheej hmoo hluav taws kub.
Cov Qhov Zoo: Kev txhim kho efficiency tau txhim kho los ntawm 40% piv rau kev vuam ib txwm. Lawv siv EPDM rubber seals uas tiv taus kub los ntawm -40°C mus rau 120°C, tsim nyog rau kev tua hluav taws thiab HVAC systems.
C. Flanges
Flanges yog qhov tseem ceeb rau kev txuas cov kav dej mus rau cov valves lossis khoom siv. Cov chaw tsim khoom tseem ceeb tsim flanges hauv ntau hom khoom siv (piv txwv li, 20G, 16Mn) kom tau raws li cov kev xav tau tshwj xeeb hauv kev lag luam roj thiab roj av.
3. Cov Kev Siv Tseem Ceeb thiab Kev Nkag Siab Hauv Kev Lag Luam
Stainless steel fittings pab rau ntau yam haujlwm, txhua qhov muaj cov kev xav tau sib txawv.
Kev Tua Hluav Taws thiab Cov Tshuab Cua Sov
Qhov ruaj khov ntawm cov fittings hauv cov tshuab no yog qhov tseem ceeb heev.
Qhov Teeb Meem Corrosion: Cov ntaub ntawv qhia tau tias 32% ntawm cov xwm txheej kav dej tso hauv cov kav dej tua hluav taws yog tshwm sim los ntawm kev tiv taus corrosion tsis txaus ntawm cov fittings, thiab 26% ntawm cov tshuab cua sov tsis ua haujlwm yog vim laus thiab xeb.
Kev Daws Teeb Meem: Hloov cov carbon steel ib txwm (uas muaj lub neej 5-8 xyoo) nrog stainless steel kev daws teeb meem (lub neej >70 xyoo) txo cov nqi kho los ntawm 75%. Piv txwv li, Nanjing Metro Line 10 qhov kev hloov kho tshuab tua hluav taws tau siv 304 stainless steel press fittings los tawm tsam av noo hauv av, ua tau qhov tsis muaj kev ua tsis tau haujlwm li 3 xyoos.
Kev Ua Haujlwm Hauv Nroog thiab Kev Tsim Vaj Tsev
Hauv cov haujlwm hauv nroog, qhov kev zoo nkauj thiab kev ruaj ntseg ntawm cov qauv yog mus ua ke.
Cov Kev Siv: Cov phab ntsa thaiv kev (road isolation barriers), tej qhov rooj hlau ntawm tus choj (bridge guardrails), thiab cov tuav ntaiv hauv tsev (building handrails).
Kev Ua Raws Li Kev Xav Tau: Cov neeg muag khoom tam sim no muab kev ua raws li qhov tseeb siab heev rau cov kav dej nyias (thin-walled pipes), nrog rau cov txoj kab uas hla li ntawm 6mm mus rau 219mm thiab cov tolerances tswj tau rau hauv ±0.03mm kom haum cov qauv tsim architectural complex.
Kev Siv Dej Haus thiab Kev Ntxuav
Nrog cov kev cai ib puag ncig nruj dua, cov fittings rau cov dej haus (potable water) yuav tsum tau ua raws li cov qauv huv siab. Cov khoom yuav tsum tau dhau los ntawm kev ntsuam xyuas kev nyab xeeb huv siab rau dej haus. Ob qho kev pov thawj kev tswj hwm ib puag ncig ISO14001 thiab cov ntawv tso cai kev nyab xeeb hauv teb chaws tshwj xeeb yog tam sim no yuav tsum tau rau cov neeg muag khoom uas ua raws li kev cai.
4. Daim Ntawv Xyuas Kev Yuav Khoom thiab Kev Ua Raws Li Kev Cai rau 2026
Thaum nrhiav khoom stainless steel pipe fittings, tshwj xeeb rau tej haujlwm thoob ntiaj teb, xav txog cov ntsiab lus hauv qab no:
Cov Kev Txwv Ntawm Kev Pov Thawj: Cov ntaub ntawv kev lag luam thoob ntiaj teb qhia tau tias 42% ntawm cov kev txiav txim yog thaiv los ntawm qhov tsis muaj cov ntawv pov thawj rau lub hom phiaj ua lag luam. Cov ntawv pov thawj tseem ceeb suav nrog:
EU: CE Marking
USA: UPC Certification
Australia: WaterMark Certification.
Kev Ua Raws Li Ib Puag NCig: Kev ua raws li REACH regulations (txwv tsis pub muaj ntau dua 1000 yam khoom txaus ntshai) yog qhov yuav tsum tau ua rau kev xa tawm mus rau Europe [[2]].
Lub Peb Hwj (Capability) Ntawm Tus Neeg Muag Khoom: Ntsuam xyuas cov neeg muag khoom raws li lawv lub peev xwm los muab cov ntaub ntawv kuaj los ntawm lwm tus neeg (third-party testing data), qhov loj ntawm cov khoom khaws cia (piv txwv li, >1000㎡ tej tsev khaws khoom tiav), thiab tej haujlwm tshwj xeeb xws li subway lossis tsev kho mob.
Xaus
Stainless steel pipe fittings muaj kev ruaj khov thiab ntau yam uas tsis muaj qhov sib piv. Txawm hais tias rau cov txheej txheem tua hluav taws tseem ceeb lossis cov kev siv architectural precision, qhov kev hloov mus rau cov khoom siv qib siab xws li 316L thiab cov txheej txheem kev twb zoo xws li press thiab groove technology txhais tau qhov kev xav tau ntawm kev lag luam. Los ntawm kev ua ntej xyuas cov khoom siv uas tau pov thawj thiab cov hom kev twb uas tsim nyog, cov neeg muaj feem cuam tshuam tuaj yeem xyuas kom muaj kev nyab xeeb thiab kev ruaj khov mus sij hawm ntev ntawm lawv cov kav dej systems.
