Piv SDR11, SDR17, thiab SDR21 raws li siab, bore, hnyav, thiab tawv - yuav xaiv SDR zoo rau HDPE yeeb nkab li cas, thiab vim li cas koj cov fittings yuav tsum phim.

Pressure rating

Phab ntsa tuab dua tswj tau ntau hoop stress, yog li SDR qis txhais tau tias PN siab dua. Yog li ntawd SDR thiaj li tau hais txog, thiab vim li cas hloov SDR thiaj li hloov tau qhov siab tso cai ntawm kab.

Internal bore and flow

Vim tias qhov dav sab nraud yog teeb los ntawm tus qauv, phab ntsa tuab dua txo qhov tob. Ob lub raj uas muaj tib DN tsis tuaj yeem hloov tau hydraulic-qhov nyias dua cia dej ntws ntau dua ntawm tib ceev.

Mass and cost

Yeeb nkab muag raws li qhov hnyav, yog li qhov tuab ntawm phab ntsa cuam tshuam rau tus nqi. Hloov ntawm SDR17 mus rau SDR11 ntawm tib txoj kab uas hla yuav ua rau tus nqi khoom siv ib meter nce txog 50%, txawm tias tseem tsis tau suav nrog kev tuav ntxiv thiab cov khoom siv fusion loj dua.

Ring stiffness

Ib phab ntsa tuab tswj tau siab sab nraud zoo dua. Thaum muab tso rau hauv av tob, nrog kev tsheb nqaj hlau hnyav saum toj, lossis nrog av pob zeb, ib lub raj phab ntsa nyias yuav nqes ntau dua thiab nyob ntawm seb cov khoom ib puag ncig puas ruaj khov npaum li cas. Qhov no yog qhov feem ntau neeg tsis nco qab, thiab nws yog qhov ua rau muaj teeb meem ob peb xyoos tom qab.

Xaiv SDR11 (PN16) thaum siab yog qhov tseem ceeb tshaj

SDR11 yog qhov kev xaiv zoo tshaj plaws thaum lub raj xav tau kev tswj siab siab, thaum lub system raug twj tso kua mis es tsis txhob cia siab rau lub zog hnyav, lossis thaum muaj kev nce siab tiag tiag-xws li hauv cov kav dej ntev uas nce siab, cov kab tailings hauv qhov mining, dej hauv kev lag luam, hydro-transport, thiab cov raj saum av uas xav tswj kev txav cua sov.

Also consider itthaum lub raj yuav tsum tiv taus kev kho tawv, av pob zeb, lossis qhov chaw tob hauv kev tsheb nqaj hlau hnyav. Phab ntsa tuab dua yog rau kev txhawb nqa qauv, tsis yog tsuas yog siab xwb.

Xaiv SDR17 (PN10) rau feem ntau cov network zais

SDR17 yog qhov kev xaiv qauv rau cov yeeb nkab dej hauv nroog thiab cov kab roj, thiab muaj laj thawj zoo. Ib qho kab dej loj feem ntau khiav ntawm 4 txog 8 bar, yog li PN10 yooj yim tswj tau qhov siab nrog ib qho buffer xis rau txhua yam surges, tsis muaj phab ntsa tuab ntxiv uas koj tsis xav tau. Nws yooj yim dua rau nruab, cov yeeb nkab nyhav tsawg dua, thiab cov fittings yog qhov feem ntau uas koj yuav pom hauv txhua pawg.

Check before you committias qhov siab kuaj uas tus neeg tswj network xav tau-feem ntau yog 1.5 npaug PN-yuav tau mus txog nrog qhov siab uas muaj nyob rau qhov siab tshaj plaws ntawm qhov chaw.

Xaiv SDR21 (PN8) thaum muaj peev xwm ntws thiab tus nqi tseem ceeb tshaj plaws

SDR21 ua haujlwm zoo rau cov yeeb nkab hloov dej uas muaj taub hau qis, cov tshuab irrigation, qhov dej ntws los ntawm qhov hnyav, qhov dej hiav txwv, thiab cov voj dej txias uas siab qis thiab lub hom phiaj yog txav dej ntau li ntau tau rau koj cov nyiaj. Muaj ib lub raj dav dua thiab nyhav tsawg dua yog qhov zoo heev.

Do notSiv nws qhov chaw uas lub raj yuav nyob hauv qab txoj kev ntawm ib qho tob, qhov chaw uas cov av rov qab coarse, lossis qhov chaw uas kab yuav raug kuaj siab tshaj 8 bar. Phab ntsa ua haujlwm ze rau nws qhov txwv, yog li qhov zoo ntawm cov khoom ib puag ncig tseem ceeb tshaj qhov twg los.

Dab tsi tshwm sim yog tias koj sib tov lawv

Yog koj txav ib lub raj SDR17 mus rau ib qho SDR11 coupling uas muaj qhov dav sib npaug, phab ntsa raj tsuas yog kwv yees li ob peb feem peb ntawm qhov qhov chaw xav tau. Lub coil kawg tso cua sov rau hauv qhov chaw thiab phab ntsa raj es tsis yog qhov txuas nws tus kheej. Lub cim qhia fusion tej zaum tseem yuav ua haujlwm, weld yuav zoo li zoo ntawm sab nraud, thiab qhov txuas tej zaum yuav dhau ib qho kev kuaj siab ceev-tab sis tej zaum nws yuav puas tom qab ob peb lub hlis thaum kab nyob hauv kev thauj khoom tas mus li.

Yuav qhia li cas rau ntawm daim ntawv xaj khoom

Sau SDR rau txhua kab ntawm daim ntawv teev sijhawm, nyob ib sab ntawm DN.Electrofusion coupling"DN110" yog ib kab khoom tsis tiav. "Electrofusion coupling dn110, SDR17, PE100" yog ib kab khoom uas tuaj yeem tsim thiab tshuaj xyuas tau tiag tiag. Yog tias ib qho project tiag tiag sib xyaw hom-xws li SDR11 ntawm pumped main thiab SDR17 ntawm cov ceg faib-lub sijhawm fitting yuav tsum tau faib kom raug, thiab cov pab pawg chaw yuav tsum tau qhia tias qhov twg yog qhov twg.

Reducers and transitions

Thaum ob pawg SDR sib ntsib ntawm kev hloov diameter, siv ib qho fitting txo tshwj xeeb es tsis txhob siv reducer nrog coupler ncaj. Txhua qhov txuas ntxiv txhais tau tias muaj ib qho fusion ntxiv yuav tsum kuaj, thiab reducer uas tsis phim SDR ntawm ib qho raj feem ntau ua rau ntws dej. Tag nrho cov electrofusion,butt fusionthiab cov khoom txuas rooj zaum los ntawm DN thiab SDR tau teeb tsa hauv pebHDPE yeeb nkab fittings cov ntsiab lus tsev qiv ntawv.

1. Luam SDR los ntawm qhov project dhau los

Qhov haujlwm dhau los muaj lub taub hau static txawv, kev teeb tsa surge txawv, thiab qhov tob faus txawv. SDR yog yam koj suav rau kev tsim, tsis yog ib txoj cai ruaj khov ntawm tuam txhab. Ua dua raws li txoj hauj lwm tiag tiag, ces ntxiv surge allowance ntawm tus neeg ua haujlwm rau saum.

2. Xaiv raws li txoj kab uas hla thiab tsis saib qhov qhov

Ob lub raj DN110, ib qho SDR11 thiab ib qho SDR21, txawv 22% hauv thaj chaw cross-sectional. Nyob rau hauv ib qho kev siv zog hnyav ntev lossis lub taub hau qis, qhov ntawd yog qhov txawv ntawm kev nqa cov dej ntws tsim thiab tsis nqa. Yog tias kev suav hydraulic tau ua raws li qhov dav nominal, nws tau ua tsis raug.

3. Hloov kho lub raj tab sis tsis hloov kho cov khoom txuas

Hloov lub raj los ntawm SDR17 mus rau SDR11 rau kev nce siab ntxiv thaum khaws lub sijhawm txuas raws li qub tsim ib kab uas cov txuas tsis tau ua kom raug. Lub sijhawm fitting yuav tsum hloov raws li lub sijhawm ntawm lub raj, ib txwm.

4. Tsis nco qab txog qhov derating factor

Ib lub raj SDR17 PN10 nqa dej ntawm 45°C raug ntsuas txog 6.7 bar, tsis yog 10. Xaiv PN los ntawm daim ntawv teev npe yam tsis suav txog kub yog txoj kev nrov tshaj plaws uas ib qho qauv uas yuav tsum zoo kawg nkaus tab sis kawg nkaus muaj siab dhau thaum siv.

5. Tsis txhob xav txog koj ib puag ncig

Hom phab ntsa nyias uas xaiv tsuas yog rau kev nias tseem yuav tsum muaj zog tiv thaiv av thiab kev khiav saum toj. Yog tias av rov qab puv loj lossis npog tob, xaiv siv SDR qis dua lossis tsim bedding thiab compaction kom raug-thiab xyuas kom meej, vim thaum lub raj tau muab tso rau hauv av lawm, koj tsis tuaj yeem tshuaj xyuas nws.

SDR qis dua puas yeej zoo dua?

Tsis yog. SDR qis dua txhais tau tias lub raj tuaj yeem tuav tau siab ntau dua, muaj zog dua, thiab tiv taus kev puas tsuaj zoo dua, tab sis nws kim dua, hnyav dua, thiab muaj qhov dej me dua. Yog koj tham txog ib qho 4-bar irrigation main, SDR11 yog nyiaj pov tseg rau ib lub raj uas tsis xav tau qhov muaj zog ntawd – ntxiv rau qhov qhov dej me dua txo qhov dej ntws uas koj xav tau.

Kuv puas tuaj yeem txuas ib lub raj SDR11 rau ib lub raj SDR17?

Tsis yog nrog coupling ib txwm. Qhov dav sab nraud ntawm ob pawg SDR ntawm tib DN yog tib yam, tab sis phab ntsa tuab txawv, yog li fusion socket tsim rau ib qho yuav tsis haum rau lwm qhov. Txoj kev raug yog tsim tshwj xeebtransition fitting, lossis ib qho flanged lossis mechanical joints tsim rau nws. Butt fuse ob hom SDR sib txawv tsuas ua haujlwm yog tias qhov txawv me me thiab txoj kev vuam tau pom zoo raws cai.

SDR puas cuam tshuam rau fusion parameters?

Yog, thiab qhov no yog ib qho yuam kev ntawm qhov chaw uas tshwm sim ntau. Lub sijhawm kub thiab txias rau butt fusion nyob ntawm phab ntsa tuab, yog li txoj kev sau rau SDR17 yuav tsis ua haujlwm rau SDR11 uas muaj tib txoj kab dav. Electrofusion teeb tsa yog coj los ntawm barcode ntawm fitting, uas yog coded los ntawm SDR – ib qho laj thawj ntxiv uas koj yuav tsum muaj qhov fitting raug ntawm qhov chaw.

Kuv yuav tsum khaws SDR twg hauv khw ua tus faib khoom?

SDR17 hauv PE100, tom qab SDR11, yog qhov loj tshaj plaws ntawm kev thov dej thiab roj hauv feem ntau lub lag luam, nrog SDR21 thiab SDR26 siv ntau dua rau kev tsuag dej thiab kev tso dej. Khaws cov fittings rau txhua pawg hauv khw, vim tus neeg faib khoom uas muaj raj tab sis tsis muaj cov couplings sib phim yuav poob kev txiav txim rau tus uas muaj.

SDR thiab PN txawv li cas?

SDR yog ib qho piv geometric-txhais tau tias qhov dav sab nraud faib los ntawm phab ntsa tuab-thiab nws qhia koj txog lub raj. PN yog ib pawg siab ntsuas hauv bars, thiab nws suav los ntawm SDR thiab hom khoom. Vim tias kev hloov pauv nyob ntawm cov khoom siv, tib SDR tuaj yeem muab cov nqi PN sib txawv rau PE80 thiab PE100, yog li ntawd ib qho kev piav qhia yuav tsum hais ob qho.

Kuv yuav kuaj SDR ntawm ib pawg khoom uas twb xa tuaj li cas?

Ntsuas qhov dav sab nraud thiab phab ntsa tuab ntawm qee qhov chaw, tom qab ntawd suav dn faib los ntawm t. Vim tias phab ntsa tuab muaj qee qhov kev tso cai, koj tsuas yog yuav tsum xyuas seb qhov piv puas nyob hauv qhov kev tso cai rau pawg uas koj tau txiav txim. Tau txais daim ntawv tshuaj xyuas qhov ntev ntawm lub tshuab rau batch thiab piv nrog qhov koj ntsuas – ua tib yam rau ib qho khoom siv ntawm txhua qhov kev xa khoom, vim tias qhov txuas tsis raug npe yuav tsis pom tseeb txog thaum weld puas.