Ubungakanani bokwenyani bombhobho abuhambelani nobukhulu bombhobho oqhelekileyo. Umbhobho we-NPS oyi-intshi ezi-2 unobubanzi obungaphandle obuyi-intshi ezi-2.375, hayi ii-intshi ezi-2.000. Inani lisebenza njengelebheli egcina ixabiso elifanayo kuzo zonke iishedyuli ngelixa ubukhulu bodonga lwemveliso buhluka.
Umphathi wokuthenga kwifemu yobunjineli yaseMumbai ujongene nalo mceli mngeni emva kokuba uRaj Patel efunde isifundo sakhe sobungcali. Iprojekthi yakhe yayifuna ubude obungama-50 bombhobho wentsimbi engagqwaliyo engama-intshi ezi-2 kumgca wenkqubo yeekhemikhali. Wa-odola iityhubhu zentsimbi engagqwaliyo ezingama-intshi ezi-2 ngaphandle kokujonga iinkcukacha. Ukuthunyelwa kwafika neetyhubhu ezazinobukhulu bangaphandle obungama-intshi ezi-2.000. Iityhubhu zazinobukhulu obuthintela ukusetyenziswa kwazo kunye neeflanges ze-intshi ezi-2 esele zikhona kwindawo. Inkampani yakhe ilahlekelwe ziindleko zokuthutha ezibuyayo ezingama-800 kunye neeveki ezimbini zexesha lokuvelisa ngenxa yokungangqinelani. Yonke ingxaki ngeyayisombululwe ngokuhlola kube kanye itafile yobukhulu be-OD.
Eli nqaku lichaza ubungakanani bombhobho oqhelekileyo njengengcamango ebonisa ukuba kutheni obu bungakanani bahlukile kubungakanani bombhobho wokwenyani ngelixa lichaza indlela yokufunda iimpawu ze-NPS kumsebenzi wasemaphandleni. Olu xwebhu luqulathe itshathi epheleleyo yobungakanani bombhobho ebonisa zonke izilinganiso ezifunekayo kunye nedatha yokuguqulwa kwe-NPS ukuya kwi-DN kunye nemiyalelo yokulinganisa imibhobho xa iimpawu zayo zigugile okanye zingekho kwaphela.
IItrakthi ezibalulekileyo
- Ubungakanani bombhobho obizwa ngokuba yiNominal pipe (NPS) yilebheli, ayingomlinganiselo — umbhobho we-NPS oyi-intshi ezimbini ulinganisa ii-intshi eziyi-2.375 ngaphandle.
- Zonke iipayipi ezine-NPS efanayo zabelana ngobubanzi obufanayo bangaphandle (OD), nokuba ishedyuli okanye ubukhulu bodonga bunjani.
- I-NPS ngumgangatho waseMntla Melika; i-DN (ububanzi obuqhelekileyo) yi-metric equivalent esetyenziswa eYurophu naseTshayina.
- Iipayipi kunye neetyhubhu zisebenzisa iinkqubo ezahlukeneyo zobukhulu — iipayipi zisebenzisa i-NPS, iityhubhu zisebenzisa i-OD yokwenyani — kwaye ukuzixuba kubangela ukungaphumeleli kokulungiswa.
- Ungayibona i-NPS ebaleni ngokulinganisa i-OD ngee-calipers uze uyifanise namaxabiso aqhelekileyo.
Yintoni ubungakanani bepayipi eqhelekileyo?
Ubungakanani bombhobho obizwa ngokuba yiNominal (NPS) yinkqubo emiselweyo yokumisela ubungakanani bombhobho obuchazwe yi ASME B36.10M yombhobho wentsimbi yekhabhoni kunye ne-alloy kunye ASME B36.19 kwimibhobho yentsimbi engagqwaliyo. Le nkqubo isebenza eMntla Melika, eMbindi Mpuma, nakwiimarike ezininzi zaseAsia ezilandela imigangatho ye-ANSI/ASME. Ukuze ufumane umbono obanzi weeklasi zentsimbi engagqwaliyo kunye neenkcukacha, jonga eyethu isikhokelo esipheleleyo sentsimbi engenasici.
Igama elithi nominal lithetha ukuba into ikhona kuphela kwisikhundla sayo esisemthethweni. Inombolo ye-NPS ibonisa uqikelelo olusondeleyo lomlinganiselo wobubanzi bangaphakathi kwiindlela zokuqala zoyilo lweepayipi kodwa ayihambelani nayo nayiphi na imilinganiselo yokwenyani yeepayipi zanamhlanje. Umlinganiselo wobubanzi bokwenyani, ekufuneka abathengi bawuqonde, ubonisa umahluko phakathi kobungakanani bombhobho oqhelekileyo kunye neenkcukacha zobubanzi bombhobho wokwenyani. Ububanzi bangaphakathi bombhobho weShedyuli 40 NPS 1/2 buyi-0.622 intshi, ngelixa ububanzi bangaphandle buyi-0.840 intshi. Zombini ezi zilinganiso azifikeleli kwi-0.500 intshi.
Indlela yangoku yokubiza imibhobho yaqala ekuqaleni kwenkulungwane yama-20 kuba abavelisi bemibhobho ngelo xesha bavelisa iimveliso ezingachanekanga kangako. Inkqubo yobungakanani bemibhobho yayisebenzisa umlinganiselo oqikelelweyo wembobo, owaba ligama elisisigxina lombhobho nangona iinkqubo zokuvelisa ziphucukile. Iinjineli kunye nabathengi kufuneka basebenzise ubungakanani bemibhobho eqhelekileyo namhlanje njengenkqubo eqhelekileyo yokubhekisa engameli ubukhulu bokwenyani bemibhobho.
Inkqubo yobukhulu bepayipi ye-NPS igubungela uluhlu olubanzi. I-ASME B36.10M idwelisa ubukhulu ukusuka kwi-NPS 1/8 intshi (3.2 mm) ukuya kwi-NPS 80 intshi (2,032 mm). Uluhlu oluqhelekileyo olugcinwa ziindawo ezininzi kumashishini luqala kwi-NPS 1/8 ukuya kwi-NPS 24 ngelixa abathengi kufuneka babeke iiodolo ezikhethekileyo zobukhulu obukhulu.
Ubungakanani bePayipi eqhelekileyo vs Ububanzi bokwenyani: Ingcamango ephambili
Umthetho wokuqala wobungakanani bemibhobho umisela ukuba zonke iisayizi zemibhobho eziqhelekileyo zigcina ubungakanani obungaguqukiyo bobubanzi bangaphandle, obuhlala bungaguquki ngenxa yeemfuno ezahlukeneyo zeshedyuli yemibhobho. Ubukhulu bodonga lwemibhobho buya kumisela zombini ububanzi bemibhobho yangaphakathi kunye nomlinganiselo woxinzelelo oluhambelanayo lwenkqubo.
Ubungakanani bombhobho obuziisentimitha ezi-4 bugcina ububanzi obungaguqukiyo bangaphandle obuziisentimitha eziyi-4.500 kuzo zonke iintlobo zombhobho zeShedyuli 5, iShedyuli 40, iShedyuli 80 kunye neShedyuli 160. I-ID yombhobho iyancipha xa inani leshedyuli lisanda kuba kusetyenziswa ubukhulu bodonga obahlukeneyo. Iindonga ezityebileyo zibangela ububanzi bombhobho obuncitshisiweyo, obuvumela amandla amakhulu okuphatha uxinzelelo ngelixa kunyusa ubunzima ngenyawo nganye yombhobho.
Itshati yobungakanani bepayipi ye-NPS: Ubukhulu obuqhelekileyo
| NPS | OD (ngaphakathi) | I-OD (mm) | Isazisi seSch 40 (ngaphakathi) | Isazisi seSch 80 (ngaphakathi) | Ubunzima beSch 40 (lb/ft) | Ubunzima beSch 80 (lb/ft) |
|---|---|---|---|---|---|---|
| 1 / 8 " | 0.405 | 10.3 | 0.269 | 0.215 | 0.24 | 0.31 |
| 1 / 4 " | 0.540 | 13.7 | 0.364 | 0.302 | 0.42 | 0.54 |
| 3 / 8 " | 0.675 | 17.1 | 0.493 | 0.423 | 0.57 | 0.74 |
| 1 / 2 " | 0.840 | 21.3 | 0.622 | 0.546 | 0.85 | 1.09 |
| 3 / 4 " | 1.050 | 26.7 | 0.824 | 0.742 | 1.13 | 1.47 |
| 1 " | 1.315 | 33.4 | 1.049 | 0.957 | 1.68 | 2.17 |
| 1-1 / 2 ″ | 1.900 | 48.3 | 1.610 | 1.500 | 2.72 | 3.63 |
| 2 " | 2.375 | 60.3 | 2.067 | 1.939 | 3.65 | 5.03 |
| 3 " | 3.500 | 88.9 | 3.068 | 2.900 | 7.58 | 10.26 |
| 4 " | 4.500 | 114.3 | 4.026 | 3.826 | 10.79 | 14.99 |
| 6 " | 6.625 | 168.3 | 6.065 | 5.761 | 18.97 | 28.60 |
| 8 " | 8.625 | 219.1 | 7.981 | 7.625 | 28.55 | 43.43 |
| 10 " | 10.750 | 273.1 | 10.020 | 9.562 | 40.48 | 64.49 |
| 12 " | 12.750 | 323.9 | 11.938 | 11.374 | 53.52 | 88.71 |
Itshathi yobukhulu bepayipi ibonisa ukuba amanani e-NPS awaboneleli ngolwazi olwaneleyo lokuqikelela ubungakanani ngokusebenzisa kwawo. Ukulinganiswa kobubanzi bangaphandle kubonisa ukunyuka okungalinganiyo, okudala ubungakanani obahlukeneyo. I-NPS 3 ibonisa ukunyuka kobubanzi be-47% xa kuthelekiswa ne-NPS 2. I-NPS 12 ibonisa ukunyuka kobubanzi be-18% xa kuthelekiswa ne-NPS 10. Imigangatho yokuvelisa yexesha elidlulileyo, kunye neendlela zokulinganisa imboni, zenze le ndlela ithile yokuqhubela phambili, engalandeli imigaqo yoyilo lobunjineli.
Amava entsimi abonisa ukudideka kuba inkqubo yokulinganisa ye-NPS ithi ubungakanani be-NPS obungaphezulu kwe-12 busebenzisa umlinganiselo we-OD, olingana nexabiso le-NPS ngee-intshi. I-NPS 14 ine-OD eyi-intshi ezili-14.000. I-NPS 20 ine-OD eyi-intshi ezingama-20.000. Inkqubo ye-NPS kwiimilinganiselo ezingaphantsi kwe-NPS 12 idala imilinganiselo eyahlukeneyo yobukhulu bokwenyani ekhoyo ngaphandle kweekhonkco zezibalo ezisekwe kwiimilinganiselo ze-NPS.
I-NPS vs DN vs IPS: Ukuqonda iMigangatho yoBukhulu
Imigangatho yobungakanani bemibhobho iyahluka ngokwengingqi kunye nokusetyenziswa kwayo. Iinjineli ezisebenza kwiiprojekthi zamazwe ngamazwe kufuneka zazi ukuba zichaze nini i-NPS, nini zisebenzise i-DN, kunye nendlela ezi nkqubo zimbini ezinxibelelana ngayo.
I-NPS vs DN: Itheyibhile yoGuqulo lweMetric
| NPS (ngaphakathi) | I-DN (mm) | I-OD eqhelekileyo (mm) |
|---|---|---|
| 1 / 2 " | I-DN 15 | 21.3 |
| 3 / 4 " | I-DN 20 | 26.7 |
| 1 " | I-DN 25 | 33.4 |
| 1-1 / 2 ″ | I-DN 40 | 48.3 |
| 2 " | I-DN 50 | 60.3 |
| 3 " | I-DN 80 | 88.9 |
| 4 " | I-DN 100 | 114.3 |
| 6 " | I-DN 150 | 168.3 |
| 8 " | I-DN 200 | 219.1 |
| 10 " | I-DN 250 | 273.1 |
| 12 " | I-DN 300 | 323.9 |
I-NPS iseyeyona nkqubo iphambili eMntla Melika, eMbindi Mpuma, nakwiimarike ezininzi zaseAsia ezithumela impahla kwamanye amazwe. Iiprojekthi zasekhaya ze-European Union kunye ne-China kunye ne-ISO-standard specifications zisebenzisa i-DN (ububanzi obuqhelekileyo) njengomgangatho wazo we-metric. Ezi nkqubo zimbini azifani — amaxabiso e-DN amalunga ne-metric ejikeleziweyo — kodwa ubukhulu be-OD busondelelene ngokwaneleyo kangangokuba iipayipi ze-NPS kunye ne-DN ezinobukhulu obufanayo zihlala zidibana nezixhobo ezihambelanayo.
Ububanzi bangaphandle (OD) bombhobho we-DN 50 buyi-60.3 mm, nto leyo ehambelana ngokugqibeleleyo nomgangatho we-NPS 2. Ububanzi bangaphandle (OD) bombhobho we-DN 100 buyi-114.3 mm, nto leyo ehambelana nomgangatho we-NPS 4. Iinjineli ezisebenza ngemigangatho exutyiweyo kufuneka zisoloko ziqinisekisa i-OD yokwenyani endaweni yokucinga ukulingana.
I-NPS xa ithelekiswa ne-IPS
I-IPS imele ubungakanani bepayipi yentsimbi. Kwiimeko ezininzi zoshishino, i-NPS kunye ne-IPS ziyatshintshana kwipayipi yentsimbi. Nangona kunjalo, i-IPS ikwavela kwiimeko zepayipi apho ibhekisa kwimigangatho yentambo (i-NPT — iNational Pipe Taper) endaweni yobukhulu bepayipi ngokwayo.
Umahluko ophambili: I-NPS ibhekisa kubukhulu bomzimba wombhobho. I-NPT ibhekisa kwimo yomsonto. Umbhobho unokuba yi-NPS 2 kunye nemisonto ye-NPT. Ukudideka kwezi zimbini kunokukhokelela kwiimpazamo zoku-odola, ngakumbi xa kuthengwa izixhobo zokufaka imisonto okanye iivalvu.
Xa uthenga izinto kwihlabathi liphela, soloko ucacisa umgangatho wobukhulu kunye nomgangatho womsonto. I-“NPS 2, iShedyuli 40, imisonto ye-NPT” ayishiyi ntsingiselo ingako. “Ipayipi ye-intshi ezi-2” ayishiyi ntsingiselo.
Indlela yokulinganisa nokuchonga i-NPS ebaleni
Ayizizo zonke iipayipi ezifika zineempawu ezicacileyo. Abasebenzi basentsimini badla ngokudibana neepayipi ezineestencil eziphelelwe lixesha, iilebhile ezipeyintwe ngaphezulu, okanye ezingenazo iimpawu konke konke. Nantsi indlela yokuchonga i-NPS ngezixhobo ezisisiseko.
Inyathelo 1: Linganisa ububanzi bangaphandle
Sebenzisa i-caliper yedijithali okanye iteyiphu ye-OD yombhobho. Linganisa ubuncinane amanqaku amabini ukusuka kwi-90 degrees ukuze ujonge ukuba ayijikelezi. Tshatisa umlinganiselo wakho namaxabiso aqhelekileyo e-OD:
- 0.840 intshi = NPS 1/2
- 1.050 intshi = NPS 3/4
- 1.315 intshi = NPS 1
- 1.900 intshi = NPS 1-1/2
- 2.375 intshi = NPS 2
- 3.500 intshi = NPS 3
- 4.500 intshi = NPS 4
- 6.625 intshi = NPS 6
Ukuba umlinganiselo wakho ungaphakathi kwe-1% yexabiso eliqhelekileyo, sele uchongile ubungakanani bombhobho oqhelekileyo. Ukunyamezelana kokuvelisa kuvumela ukuphambuka okuncinci, ngoko ke ukufundwa kwee-intshi eziyi-2.360 kwi-caliper phantse ngokuqinisekileyo kuthetha i-NPS 2.
Inyathelo lesi-2: Linganisa ubukhulu bodonga
Sebenzisa i-digital wall thickness gauge okanye i-ultrasonic tester. Thelekisa ukufundwa kwakho namaxabiso eshedyuli aqhelekileyo ukuze ubone inombolo yeshedyuli. Umbhobho onobukhulu be-2.375-intshi OD kunye nobukhulu bedonga obuyi-0.154-intshi yi-NPS 2, iShedyuli 40. I-OD efanayo enodonga oluyi-0.218-intshi yi-NPS 2, iShedyuli 80.
Inyathelo lesi-3: Funda iStencil (Ukuba ikho)
Iimpawu zemibhobho eziqhelekileyo zilandela ifomathi emiselweyo. I-stencil eqhelekileyo ifundeka ngolu hlobo: I-NPS 4 SCH 40 ASTM A53 GR B AYINAMTHUNGOUkusuka ekhohlo ukuya ekunene, oku kukuxelela ubungakanani bombhobho oqhelekileyo, ishedyuli, iinkcukacha zezinto ezisetyenzisiweyo, umgangatho, kunye nendlela yokuvelisa. Ukuba uphawu luquka "i-SMLS," oko kuthetha ukuba alunamthungo. "I-ERW" ithetha ukumelana nombane okuhlanganisiweyo. Funda ngakumbi ngeendlela zokuvelisa kwi-intanethi yethu. uthelekiso lombhobho olungenamthungo kunye noluwelding.
UCarlos Mendez, umphathi wentsimi ekuguqulweni kwefektri yokucoca eTexas, ufumanise ukuba le nkqubo ibalulekile ngexesha lokulungiswa okungxamisekileyo phakathi kwasebusuku. Icandelo elinomhlwa lomgca wenkqubo lalifuna ukutshintshwa, kodwa iimpawu zokuqala zepayipi zaziphelile emva kweminyaka eli-15 yenkonzo. UCarlos ulinganise i-OD kwiisentimitha eziyi-4.498 kwaye udonga kwiisentimitha eziyi-0.237. Ubhekisele kumaxabiso athelekiswa netshathi ye-OD yepayipi waza waqinisekisa ubungakanani bepayipi 4, iShedyuli 40, ASTM A53. Umbhobho wokutshintsha ufike ngentsimbi yesi-6:00 kusasa kwaye iyunithi yaqala kwakhona ngexesha elicwangcisiweyo. Ngaphandle kwendlela yokulinganisa, abasebenzi bebeya kuqikelela - kwaye ukuqikelela okungalunganga kumgca we-400 PSI bekunokuba yintlekele.
Ishedyuli yeMibhobho kunye ne-NPS: Indlela Ezisebenzisana Ngayo
Inkcazelo epheleleyo ifuna zombini i-NPS kunye neshedyuli yombhobho, esebenza njengezinto zayo ezimbini. I-NPS imisela ububanzi bangaphandle bombhobho. Ishedyuli ichaza ubukhulu bodonga lombhobho. Ezi zilinganiso zimbini zimisela iipropati ezintathu zombhobho, ezibandakanya ububanzi bangaphakathi kunye nomthamo wokuhamba kwamanzi kunye nomlinganiselo woxinzelelo.
I-NPS yodwa ayiboneleli ngolwazi olwaneleyo lokumisela umthamo woxinzelelo. I-NPS 4 ibonisa ububanzi bangaphandle obuzii-intshi eziyi-4.500. Olu lwazi alubonisi umthamo woxinzelelo lombhobho. Ishedyuli inika ulwazi olufunekayo, oluquka iShedyuli 40, 80, 160, okanye naluphi na olunye uphawu lokumisela ubukhulu bodonga kunye nokwenza izibalo zovavanyo loxinzelelo.
Inani eliphezulu leshedyuli linyusa ubukhulu bodonga kwaye liyancipha ububanzi bangaphakathi ngelixa linyusa amandla oxinzelelo kunye nobunzima bepayipi kumlinganiselo ngamnye we-NPS. Ubudlelwane phakathi kwezinto ezimbini eziguquguqukayo abulandeli indlela ethe tye. Ubukhulu bodonga lweShedyuli 80 buphantse bube ngama-40-70% kunoluhlu lweShedyuli 40, kuxhomekeke kwi-NPS, kodwa ukunyuka koxinzelelo kuyahluka ngobukhulu kuba umlinganiselo wobubanzi ukuya kubukhulu uyatshintsha.
Ngamanye amaxesha iinjineli kufuneka zonyuse umthamo woxinzelelo ngaphandle kokutshintsha ubungakanani bombhobho oqhelekileyo. Ukucacisa ishedyuli ephezulu kufezekisa oku ngaphandle kokutshintsha iipateni zebholithi yeflange okanye isithuba senkxaso, kuba i-OD ihlala ifana. Esi sesinye sezizathu zokuba iShedyuli 80 idume ngokulungiswa koxinzelelo oluphezulu - ungatshintsha iShedyuli 40 ngeShedyuli 80 ngaphandle kokutshintsha naziphi na izixhobo ezingqongileyo.
Ukuze ubone nzulu indlela ishedyuli echaphazela ngayo ukulinganiswa koxinzelelo kunye nobunzima, jonga eyethu Isikhokelo semibhobho yeShedyuli yama-80Ubudlelwane phakathi kobukhulu bombhobho oqhelekileyo kunye neshedyuli yiyo emisela amandla okwenyani oxinzelelo lwalo naliphi na ipayipi elinikiweyo.
Ubungakanani obuqhelekileyo be-NPS kunye nezicelo
Amashishini ahlukeneyo akhetha uluhlu olwahlukeneyo lwe-NPS ngokusekelwe kwiimfuno zokuhamba kwamanzi, amanqanaba oxinzelelo, kunye neemfuno zesakhiwo.
| Uluhlu lweNPS | Izicelo eziqhelekileyo |
|---|---|
| 1/8 ″ - 3/4 ″ | Iityhubhu zezixhobo, iipayipi zenkqubo ezincinci, imigca ye-hydraulic, iinkqubo zokuthatha iisampulu |
| 1 ″ - 2 ″ | Iipayipi zombane, amasebe enkqubo, ukusasazwa kwe-HVAC, imigca yokutya kwebhoyila |
| 3 ″ - 6 ″ | Iipayipi eziphambili, iintloko zokusasazwa kwamanzi, iintambo zokukhusela umlilo, imigca yomphunga |
| 8 ″ - 12 ″ | Imigca yemibhobho, iindawo zokungenisa amanzi okupholisa, iintloko zenkqubo ezinkulu, uqhagamshelo lwetanki yokugcina |
| 14 ″ - 24 ″ | Imibhobho yokudlulisa amanzi, amanzi angena emanzini, amanzi ajikeleza isityalo samandla |
| 30″ + | Imibhobho engaphandle kolwandle, imibhobho yamanzi emikhulu, umoya ongenisa umoya kwimijelo (iodolo ekhethekileyo) |
Uninzi lwabathengisi bemizi-mveliso lugcina i-NPS ukusuka kwisiqingatha ukuya kwi-24 kwiishedyuli eziqhelekileyo. Ubungakanani obungaphezulu kwe-NPS 24 budla ngokufuna ii-odolo zemill ezinexesha elide lokukhokela. Ukuba iprojekthi yakho idinga i-NPS 36 okanye ngaphezulu, cwangcisa imijikelo yokuvelisa yeeveki ezi-8 ukuya kwezi-12 ngokuxhomekeke kudidi lwezinto kunye nobukhulu bodonga.
Ngenkonzo yokugqwala, I-304 insimbi engenasici kwaye I-316 insimbi engenasici Umbhobho okwizinga eliqhelekileyo le-NPS unika ubomi obude benkonzo kunentsimbi yekhabhoni. Ibanga 304 liphatha uninzi lwezicelo zoshishino, ngelixa i-316 inika ukumelana okuphezulu kwe-chloride kwiindawo zaselwandle nakwiikhemikhali.
Umbhobho vs iThubhu: Umahluko obalulekileyo wobungakanani
Le yimpazamo edla imali eninzi kumaqela okuthenga. Iipayipi kunye neetyhubhu zisebenzisa iinkqubo zobukhulu obahlukeneyo ngokupheleleyo, kwaye ipayipi eyi-intshi e-1 ayifani netyhubhu eyi-intshi e-1.
Umbhobho usebenzisa i-NPS. I-OD imiselwe ngokwe-ASME B36.10M kwaye ayifani nenombolo ye-NPS. Umbhobho we-NPS oyi-intshi enye une-OD eyi-intshi eyi-1.315.
Ityhubhu isebenzisa ububanzi bangaphandle bokwenyani. Ityhubhu eyi-intshi enye inomlinganiselo ochanekileyo we-OD eyi-intshi eyi-1.000. Ubukhulu bodonga lwetyhubhu buchazwa njengenani lokulinganisa okanye umlinganiselo wedesimali, kungekhona njengeshedyuli yepayipi.
| inkcazelo | OD (ii-intshi) | Inkqubo yokulinganisa |
|---|---|---|
| Umbhobho we-NPS we-1″ | 1.315 | Ubungakanani bombhobho oqhelekileyo |
| 1″ ityhubhu | 1.000 | Eyona OD |
| Umbhobho we-NPS we-2″ | 2.375 | Ubungakanani bombhobho oqhelekileyo |
| 2″ ityhubhu | 2.000 | Eyona OD |
Umahluko phakathi kwezi ndlela zimbini ubonisa umahluko omkhulu. Ityhubhu ye-intshi enye ine-OD engaphantsi ngama-24% kunepayipi ye-NPS ye-intshi enye, ebonisa iimfuno ezahlukeneyo zokufakelwa. Inkqubo iya kuba neengxaki zonxibelelwano kuba inkqubo yakho ifuna ipayipi ye-NPS, kodwa u-ode ityhubhu.
Ityhubhu isebenza ngemisebenzi yolwakhiwo kunye neenkqubo zokutshintshiselana kobushushu, kunye nezixhobo zesayensi ezifuna iinkcukacha ezichanekileyo zobubanzi bangaphandle. Ityhubhu isebenza ngeenjongo ezintathu eziphambili, eziquka ukuthutha ulwelo kunye nokugcina uxinzelelo kunye nokuseka iinkqubo zemibhobho yenkqubo ezifuna izixhobo ezisemgangathweni kunye neeflanges.
Inkqubo efanelekileyo ifuna ukuba ulinganise ububanzi bangaphandle, nto leyo ekuvumela ukuba uqinisekise iziphumo usebenzisa itshathi yobubanzi bangaphandle bombhobho. Umlinganiselo wakho ubonisa ukuba unepayipi xa ihambelana nomlinganiselo oqhelekileyo wobungakanani bombhobho. Umlinganiselo wakho ubonisa ukuba unepayipi xa ihambelana nomlinganiselo wobungakanani obuchaziweyo ngokuchanekileyo.
Ukuba iprojekthi yakho ifuna zombini ipayipi kunye netyhubhu, okanye ukuba awuqinisekanga ukuba yeyiphi na inkcazo esebenzayo, iqela leengcebiso zobugcisa bangaphonononga imizobo yakho baze bacebise ngenkqubo yobungakanani obuchanekileyo.
Imibuzo Ebuzwa Rhoqo Malunga Nobungakanani Bemibhobho Eqhelekileyo
Ingakanani ubungakanani bombhobho oqhelekileyo?
Ubungakanani bombhobho oqhelekileyo busebenza njengenkqubo yokulinganisa esemgangathweni esetyenziswa yiMntla Melika ukuchaza ubukhulu bombhobho. Inombolo ye-NPS ilebheli, ayilomlinganiselo wokwenyani. Inkqubo yembali esetyenziselwa ukuqikelela ububanzi bangaphakathi beemodeli zombhobho zokuqala, kodwa imilinganiselo yangoku ayihambelani nenkqubo yokwenyani. Ububanzi bangaphandle bombhobho we-NPS 2 buyi-2.375 intshi endaweni yobukhulu bayo obuchaziweyo obuyi-2.000 intshi.
Yintoni umahluko phakathi kobukhulu bombhobho oqhelekileyo kunye nobubanzi bokwenyani?
Ubungakanani bombhobho oqhelekileyo xa kuthelekiswa nomahluko wobukhulu bokwenyani yeyona nto ibangela ukudideka ekuthengweni kombhobho. I-NPS isebenza njengenkqubo yokuchonga ubungakanani bombhobho, ngelixa ubukhulu bombhobho bubonisa ubukhulu bawo obulinganiswayo bangaphandle kunye nobukhulu bombhobho wangaphakathi. Umbhobho we-NPS oyi-intshi enye ulinganisa ii-intshi eziyi-1.315 ngaphandle. Umbhobho we-NPS oyi-intshi ezi-4 ulinganisa ii-intshi eziyi-4.500 ngaphandle. Inani le-NPS alize lilingane naluphi na ubukhulu bokwenyani bobukhulu obungaphantsi kwe-NPS 14.
Uyiguqula njani i-NPS ibe yi-DN?
Ukuguqulwa kwe-NPS ukuya kwi-DN kulula kakhulu kwiisayizi eziqhelekileyo. Inani le-NPS kufuneka liphindwe ngama-25 kwaye isiphumo kufuneka sijikelezwe kwixabiso eliqhelekileyo le-DN. I-NPS 1/2 iguqukela kwi-DN 15. I-NPS 2 iguqukela kwi-DN 50. I-NPS 4 iguqukela kwi-DN 100. I-NPS 6 iguqukela kwi-DN 150. Ubungakanani be-NPS kunye ne-DN obufanayo bunemilinganiselo efanayo yobubanzi bangaphandle, evumela ukutshintshwa kwezixhobo. Ukuze ufumane utshintsho oluchanekileyo, bhekisa kwitshathi yobungakanani bepayipi kweli nqaku.
Ngaba ubungakanani bombhobho obuqhelekileyo buquka ubukhulu bodonga?
Inkqubo yobukhulu bepayipi eqhelekileyo ichaza kuphela ububanzi bangaphandle bepayipi. Ishedyuli yepayipi imisela ubukhulu bodonga obuquka iShedyuli 40 kunye ne-80 kunye ne-160 kunye nezinye iimpawu. Iipayipi ezimbini ezine-NPS efanayo kodwa iishedyuli ezahlukeneyo zineedayamitha ezifanayo zangaphandle kodwa ubukhulu bodonga obahlukeneyo ngaphakathi kweedayamitha kunye novavanyo loxinzelelo.
Yintoni umahluko phakathi kwe-NPS kunye ne-IPS?
I-NPS (Ubungakanani beMibhobho Engachazwanga) kunye ne-IPS (Ubungakanani beMibhobho yentsimbi) zihlala zitshintshiselana nombhobho wentsimbi yemizi-mveliso. I-IPS ingabhekisa kwimigangatho yemisonto endaweni yobukhulu bemibhobho. I-NPT (iNational Pipe Taper) luhlobo lomsonto oluhambelana nombhobho we-NPS. Inkqubo yoku-odola ifuna ukuba unikezele ngolwazi olusemgangathweni womlinganiselo kunye nolwazi olusemgangathweni womsonto ngokusebenzisa lo mzekelo ulandelayo “Imisonto ye-NPS 2 Schedule 40 NPT.”
isiphelo
Ingcamango yobukhulu beepayipi eziqhelekileyo ikhona njengeyona nto ingaqondwa kakuhle ekuthengweni kwemizi-mveliso kuba imisela zonke izinto zoyilo lwenkqubo yeepayipi. Inombolo ye-NPS isebenza njengophawu olungasebenzi njengesixhobo sokulinganisa esichanekileyo. Ububanzi bangaphandle bepayipi ene-intshi ezi-2 bulinganisa ii-intshi eziyi-2.375. Zonke iipayipi ezinobukhulu obufanayo beepayipi ezifanayo zine-OD efanayo, ngelixa ishedyuli imisela ubukhulu bodonga, i-ID, kunye nomthamo woxinzelelo.
Inkqubo yemigangatho yamazwe ngamazwe ifuna ulwazi lwe-NPS kunye ne-DN kuba ezi nkqubo zimbini zenza imigangatho yokulinganisa eyahlukileyo. Ukulinganiswa kwentsimi ye-OD ngokufanelekileyo kuthintela iimpazamo ngexesha loku-odola kuba iimpawu ezingacacanga zikhokelela ekubhidekeni okunokwenzeka. Inkqubo yokulinganisa imibhobho kunye neetyhubhu ifuna iindlela ezahlukeneyo, eziya kukunceda uphephe iimpazamo zokufakela ezibizayo.
Itshati yobukhulu bepayipi kweli nqaku kufuneka ibe yibhukhimakhi yakho ngaphambi kwenkqubo yakho yokuthenga ezayo. Kufuneka uqinisekise i-OD kwaye uqinisekise ishedyuli ngelixa ujonga ukuba iinkcukacha zakho zifuna ipayipi okanye ityhubhu. Ukuhlolwa okuthathu kufuna umzuzu omnye ukugqitywa, kwaye kuya kuyimisa uhlobo lokungafani olubize iRaj Patel 800 kunye neeveki ezimbini.
Cela isicatshulwa kwipayipi ye-NPS kwintsimbi yekhabhoni, umbhobho steel stainless, okanye amanqanaba e-alloy. I-LIANYUNGANG DAPU METAL CO., LTD ibonelela ngobukhulu beepayipi ezisemgangathweni neziqhelekileyo ezenziwe ngokwezifiso ezineziqinisekiso ezipheleleyo ze-mill, ukusika ngokwezifiso, kunye nokuhanjiswa kwihlabathi liphela kwindawo yakho yeprojekthi.
