Pipe Fittings yog dab tsi? Lub luag haujlwm ntawm Fittings hauv Piping Systems
Cov yeeb nkab fittings yog cov khoom siv tseem ceeb siv hauv cov kav dej los txuas cov yeeb nkab ncaj nraim, hloov cov kev taw qhia ntws, ceg, txo cov yeeb nkab loj, lossis txiav ib kab. Lawv muaj nyob rau hauv ntau yam ntawm cov ntaub ntawv, configurations, qhov ntau thiab tsawg, thiab kev ntsuas siab kom haum rau txhua qhov kev tuav dej. Fittings ua lub luag haujlwm tseem ceeb hauv kev tswj cov kav dej kom ncaj ncees - xaiv thiab ntsia tau zoo kom ntseeg tau tias xau- ua haujlwm dawb, ua kom muaj cua sov nthuav dav, thiab tiv taus qhov system siab thiab kub siab heev.
Cov kev lag luam tseem ceeb tso siab rau cov yeeb nkab fittings suav nrog roj thiab roj (sab sauv, nruab nrab, thiab qis qis), tshuaj thiab petrochemical ua, tsim hluav taws xob (fossil, nuclear, thiab txuas ntxiv dua tshiab), shipbuilding thiab marine engineering, dej thiab dej khib nyiab, HVAC, thiab kev tsim kho kev lag luam. Txhua daim ntawv thov imposes cov kev cai tshwj xeeb ntawm cov khoom haum, txoj kev sib txuas, thiab cov qauv ntsuas qhov ntev.
Cov yeeb nkab fittings cais los ntawm hom kev sib txuas
Butt Weld Fittings - ASME B16.9
Butt weld fittings yog welded kawg - mus rau - xaus nrog cov yeeb nkab, tsim kom muaj tag nrho - qhov sib nqus vuam uas muab lub zog sib npaug los yog ntau dua cov yeeb nkab nws tus kheej. Lawv raug tswj hwm los ntawm ASME B16.9 rau lub Hoobkas - ua pob tw - vuam fittings. Cov fittings no muaj nyob rau hauv qhov ntau thiab tsawg los ntawm NPS 1/2 "mus txog NPS 48" thiab loj dua ntawm kev txiav txim tshwj xeeb. Lawv yog qhov kev xaiv zoo tshaj plaws rau siab - siab, siab - kub, thiab daim ntawv thov kev pabcuam tseem ceeb.
Socket Weld Fittings - ASME B16.11
Lub qhov (socket) weld fittings feature ib lub qhov (socket) recessed rau hauv cov yeeb nkab uas tau muab tso rau hauv cov yeeb nkab, tom qab ntawd lub qhov (fillet weld) yog siv rau sab nraud. ASME B16.11 tswj lub qhov (socket) vuam thiab threaded forged fittings, npog qhov ntau thiab tsawg los ntawm NPS 1/8 "mus rau NPS 4", nrog rau kev ntsuas siab ntawm Chav Kawm 3000, 6000, thiab 9000. Qhov (socket) weld fittings yog nrov nyob rau hauv siab -siab me me- bert welding qhov twg .
Threaded Fittings - ASME B16.11
Threaded fittings siv NPT los yog BSP threads los txuas cov kav dej tsis muaj vuam, ua rau lawv zoo tagnrho rau kev siv qis -siab, hluav taws xob tiv thaiv, galvanized kav, thiab tsis muaj - nplaim taws. Txawm li cas los xij, lawv tsis pom zoo rau kev thauj khoom hnyav, kev vibration, lossis thermal cycling tej yam kev mob.
| Hom kev sib txuas | Txuj | Qhov Loj | Siab Ntau | Qhov zoo | Kev txwv |
|---|---|---|---|---|---|
| Butt Weld | ASME B16.9 | 1/2 "-48" NPS | Tag Nrho Lub Sijhawm Ntau | Lub zog siab tshaj plaws, tshuaj xyuas | Yuav tsum tau txawj vuam |
| Qhov (socket) Weld | ASME B16.11 | 1/8 "-4" NPS | Chav Kawm 3000-9000 | Yooj yim sib dhos, lub zog zoo | Gap corrosion txaus ntshai |
| Xov | ASME B16.11 | 1/8 "-4" NPS | Tsawg mus rau nruab nrab | Tsis muaj vuam, tshem tau | Tsis yog rau kev vibration |
Pipe Fittings Classified los ntawm Kev Ua Haujlwm
Cov qauv siv feem ntau siv rau cov yeeb nkab fittings yog ASME B16.9 (lub Hoobkas- ua pob tw-weld fittings), ASME B16.11 (socket weld thiab threaded forged fittings), thiab ASME B16.25 (tawg-weld kawg bevel standard). Lwm cov qauv tseem ceeb suav nrog EN 10253 (Tebchaws Europe pob tw-weld fittings), JIS B2311 (Japanese carbon steel taub qab-weld fittings), thiab GB / T 12459 (Suav taub qab-weld haum qauv). Kev nkag siab txog kev sib raug zoo ntawm cov qauv no yog qhov tseem ceeb rau kev yuav khoom thoob ntiaj teb.
Common Pipe Fitting Materials Overview
Kev xaiv cov khoom siv yog ib qho kev txiav txim siab tseem ceeb tshaj plaws hauv kev tsim cov yeeb nkab haum. Cov pa roj carbon steel fittings ib ASTM A234 WPB yog qhov feem ntau siv thiab pheej yig rau kev pabcuam dav dav. Tsawg-kub carbon steel rau ASTM A420 WPL6 yog siv rau cov ntawv thov cryogenic. Stainless hlau fittings rau ASTM A403 WP304 / L, WP316 / L, thiab WP321 muab kev tiv thaiv corrosion rau tshuaj lom neeg, khoom noj khoom haus, thiab marine ib puag ncig. Alloy steel fittings ib ASTM A234 WP1, WP11, WP22, thiab WP91 ua haujlwm siab -kub hluav taws xob tsim hluav taws xob thiab kev pabcuam refinery. Duplex stainless hlau fittings ib ASTM A815 UNS S31803 (2205) thiab S32750 (2507) muab superior zog thiab chloride kuj. Nickel-raws li alloy fittings xws li Inconel (ASTM B366), Hastelloy (ASTM B366), thiab Monel yog siv nyob rau hauv huab cua corrosive thiab siab -kub ib puag ncig.
| Khoom siv | Txuj | Hom Qib | Qhov kub thiab txias | Daim ntawv thov tseem ceeb |
|---|---|---|---|---|
| Carbon Steel | ASTM A 234, ASTM A234 | WPB, WPC, WPL6 | -29℃rau 425 degree | General industrial, roj & roj |
| Stainless hlau | ASTM A403 Cov khoom lag luam | WP304/L, WP316/L, WP321 | -196℃rau 815 degree | Tshuaj, khoom noj, marine |
| Hlau alloy | ASTM A 234, ASTM A234 | WP1, WP11, WP22, WP91 | -29℃rau 650 degree | Fais fab tuag, refinery |
| Duplex SS | ASTM A815 Cov Lus Qhia Tshwj Xeeb | S31803, S32205, S32750 | -50℃rau 300 degree | Offshore, desalination |
| Inconel | ASTM B 366 Cov khoom siv | 625, 600, 825 | -196℃rau 1000 degree | Aerospace, tshuaj |
| Hastelloy | ASTM B 366 Cov khoom siv | C276, B2, C22 | -196℃rau 400 degree | Corrosion hnyav |
Pipe Fitting Pressure Rating thiab Phab Ntsa Thickness
Butt-weld fittings yuav tsum phim cov yeeb nkab phab ntsa thickness (Tsev). ASME B16.9 qhia tias phab ntsa tuab ntawm qhov kawg yuav tsum sib npaug ntawm cov yeeb nkab phab ntsa tuab ntawm cov yeeb nkab sib txuas. Rau lub qhov (socket) weld thiab threaded fittings, qhov ntsuas qhov siab yog cais raws li Chav Kawm 3000 (Schedule 80 sib npaug), Chav Kawm 6000 (Schedule 160), thiab Chav Kawm 9000 (XXS). Xaiv cov qib haum haum yuav tsum tau ua tib zoo soj ntsuam ntawm qhov system tsim siab, qhov kub thiab txias, thiab cov cai siv tau.
Pipe Fitting Dimensions thiab Marking Interpretation
Fitting qhov ntev yog teev los ntawm NPS (Nominal Pipe Size) nrog rau DN (Diameter Nominal) qhov tseem ceeb. Rau lub luj tshib, qhov loj me me yog Center-rau-End (C-to-E). Rau lub vojvoog ntev 90℃lub luj tshib, C-rau-E qhov ntev sib npaug 1.5 x NPS (piv txwv li, 6 "LR luj tshib muaj C-rau-E ntawm 9"). Lub luj tshib luv luv muaj C-rau-E sib npaug rau NPS. Tees yog cim los ntawm kev khiav loj thiab ceg loj (piv txwv li, 6 "x 6" x 4").
Pipe Fitting Procurement thiab Cov Ntsiab Lus Tshawb Fawb Zoo
Thaum muab cov yeeb nkab fittings, txheeb xyuas qhov ntev ntev raws li kev tswj hwm tus qauv, ua cov ntaub ntawv txheeb xyuas los ntawm kev kuaj PMI, thiab tshuaj xyuas cov ntaub ntawv uas tsis yog -kev puas tsuaj (kev ntsuam xyuas ultrasonic, ntsuas qhov sib nqus, lossis ntsuas cov kua dej raws li xav tau). Kev ntsuas hydrostatic lossis pneumatic yuav raug teev rau kev pabcuam tseem ceeb. Ib qho RFQ uas tsim nyog yuav tsum muaj xws li: hom haum, cov qauv siv tau, cov khoom siv qib thiab cov lus qhia tshwj xeeb, qhov loj me (NPS thiab Teem sijhawm), kom muaj nuj nqis, kev npaj kawg, thiab lwm yam kev xeem ntxiv.
Yeeb Nkab Fitting Nto Kho thiab ntim
Carbon steel fittings tau xeb-cov pov thawj txheej (roj-raws li, epoxy, los yog zinc- nplua nuj primer), kub-dip galvanizing, los yog phosphating nyob ntawm qhov kev pab cuam. Stainless hlau fittings undergo pickling thiab passivation los kho cov txheej txheem tiv thaiv chromium oxide. Rau kev xa tawm, fittings tau ntim rau hauv ntoo crates lossis pallets nrog xeb- pov thawj wrapping, thiab txhua qhov fittings raug cim raws li tus qauv yuav tsum muaj nrog qhov loj me, cov khoom siv, lub sijhawm, tus naj npawb cua sov, thiab cov chaw tsim khoom.
FAQ
Q: Yuav ua li cas xaiv ntawm pob tw weld thiab socket weld fittings?
A: Butt weld fittings yog nyiam rau qhov ntau thiab tsawg NPS 2" thiab siab dua, siab - siab / siab- qhov kub thiab txias, thiab qhov yuav tsum tau kuaj xyuas tag nrho. Qhov (socket weld fittings) raug xaiv rau me me - bore (NPS 2" thiab hauv qab no) siab - qhov teeb meem ntawm kev sib dhos yooj yim.
Q: Yuav ua li cas xaiv lub vojvoog ntev vs luv luv lub luj tshib?
A: Ntev vojvoog (R=1.5D) lub luj tshib yog cov qauv kev xaiv rau feem ntau cov ntawv thov vim qhov qis qis qis thiab ntws ntws zoo dua. Lub vojvoog luv (R=1.0D) lub luj tshib raug xaiv tsuas yog thaum qhov chaw txwv tsis pub siv lub luj tshib ntev.
Q: Yuav tsum haum cov khoom sib tw cov khoom siv yeeb nkab?
A: Yog, cov khoom siv haum yuav tsum tau sib haum nrog cov khoom siv yeeb nkab kom ntseeg tau tias muaj kev sib txhuam, kev tiv thaiv corrosion, thiab cov khoom siv zoo ib yam. Cov khoom sib txawv ntawm cov khoom sib txuas yuav tsum tau ua tib zoo soj ntsuam engineering.
Xav tau cov yeeb nkab fittings rau koj qhov project?
Hu rau ManufacturerPipe hnub no rau tus nqi sib tw thiab cov kws tshaj lij kev txhawb nqa. Peb muab ntau yam ntawm pob tw weld, socket weld, thiab threaded fittings nyob rau hauv tag nrho cov khoom qib.
Tau txais ib daim Quote
Cov khoom siv yeeb nkab fittings
- Stainless hlau yeeb nkab fittings
- Carbon Steel Yeeb Nkab Fittings
- Duplex Yeeb Nkab Fittings
- Inconel Yeeb Nkab Fittings
