Stainless Tube thiab Stainless Tubeyog ob lo lus tsis meej pem tshaj plaws nyob rau hauv stainless hlau procurement, thiab tsis meej pem cov nqi nyiaj vim hais tias ob yam khoom tau teev, qhov loj me, zam, thiab tus nqi sib txawv. Tus neeg yuav khoom uas xaj "316l cev"tawm tsam cov yeeb nkab kos duab, lossis "1-nti yeeb nkab" thaum tus qauv tsim txhais tau hais tias lub raj, yuav tau txais cov khoom tsis haum rau cov fittings, tsis ua raws li qhov kev ntsuas siab, thiab tej zaum yuav tsis raug tsim los rau txoj cai ntev ntev.
Qhov txawv tsis yog kev lag luam sib txawv; nws yog qhov sib txawv hauv qhov system nws tus kheej. Nplooj ntawv no piav qhia yuav ua li cas cov yeeb nkab thiab lub raj tau txhais, qhov kev ntsuas qhov nruab nrab ua haujlwm li cas, qhov kev ua siab ntev npaum li cas rau txhua tus, thiab qhov yuav tsum tau muab tso rau hauv kev nug kom tus neeg muag khoom xa khoom raws nraim cov khoom tsim.
Qhov sib txawv tseem ceeb: yuav ua li cas txhua yam khoom loj npaum li cas
Txoj kev huv tshaj plaws los cais cov ob yog qhov sizing system. Cov yeeb nkab yog qhov loj los ntawm cov yeeb nkab nominal loj (NPS) ntxiv rau lub sijhawm teem caij, thiab nws txoj kab uas hla sab nraud yog kho los ntawm qhov loj me tsis hais ntawm phab ntsa.
Tube yog qhov loj los ntawm qhov tseeb sab nraud txoj kab uas hla thiab cov phab ntsa tuab, ob qho tib si teev nyob rau hauv millimeters lossis nti, thiab sab nraud txoj kab uas hla tsis khi rau lub rooj loj nominal. Qhov kev sib txawv no ua rau txhua yam ntxiv - qhov kev kam rau siab, txoj kev tsim khoom, cov khoom siv, thiab tus nqi.
| Yam ntxwv | Yeeb | Tube |
| Qhov loj me | NPS (nominal yeeb nkab loj) + teem caij | Exact OD x phab ntsa thickness |
| Sab nraud txoj kab uas hla | Tsau rau NPS lub rooj (piv txwv li NPS 2=60.3 hli OD) | Txhua tus nqi (piv txwv li . 25.4 mm x 1.65 mm) |
| Phab ntsa npe | Teem sijhawm: 10S, 40S, 80S, thiab lwm yam. | Phab ntsa qhia meej hauv mm lossis hauv (qee zaum ntsuas) |
| Dimensional qauv | ASME B36.10, B36.19 | Tsis muaj cov rooj sib koom ua ke; OD thiab phab ntsa rau kev txiav txim |
| Cov qauv khoom tseem ceeb | ASTM A312, A358, A790 | ASTM A269, A213, A789 thiab ASTM A269 |
| Hom kev siv | Kev thauj cov kua hauv qab siab | Thaum tshav kub kub exchangers, instrumentation, boilers, mechanical qhov chaw |
| Fittings | Butt{0}}welding fittings rau ASME B16.9 | Instrument fittings, compression fittings, los yog kev cai |
Daim ntawv ceeb toom li cas lub rooj tsis hais: cov yeeb nkab tsis yog "loj" thiab lub raj tsis yog "me". Me - txoj kab uas hla muaj, thiab loj - txoj kab uas hla muaj. Qhov sib txawv yog purely lub dimensional system, thiab nws yog vim li cas tib cov ntaub ntawv yuav muab tau raws li ob leeg yeeb nkab thiab raj rau txawv qauv. A 60.3 hli OD khoom yog cov yeeb nkab thaum nws raug txiav txim raws li NPS 2 SCH 40S rau ASTM A312; tib txoj kab uas hla sab nraud tuaj yeem ua raj thaum nws raug txiav txim raws li 60.3 hli OD x 3.05 hli phab ntsa rau ASTM A269.
Yuav ua li cas cov yeeb nkab sizing system ua haujlwm
Cov yeeb nkab qhov ntev yog tswj hwm los ntawm ASME B36.10 (carbon thiab alloy steel) thiab ASME B36.19 (stainless hlau). Hauv qhov no, txhua qhov nominal loj muaj ib txoj kab uas hla sab nraud, thiab tus lej teem sijhawm txhais cov phab ntsa tuab.
Piv txwv li, NPS 1 yeeb nkab yog ib txwm 33.4 hli sab nraud txoj kab uas hla txawm tias nws yog SCH 10S lossis SCH 80S; tsuas yog phab ntsa thiab lub bore hloov. Qhov no yog dab tsi ua rau cov yeeb nkab fittings thiab flanges ua haujlwm: 1-inch butt-weld haum haum txhua 1-nti yeeb nkab tsis hais lub sijhawm twg los xij, vim hais tias sab nraud txoj kab uas hla thiab lub qhov (socket) bore yog tus qauv.
Tus naj npawb ntawm cov sij hawm yog kwv yees hais txog qhov piv ntawm kev tsim siab rau kev tso cai rau kev ntxhov siab, uas yog vim li cas SCH 80S nqa qhov ntsuas siab dua li SCH 40S ntawm tib qhov loj thiab cov khoom siv.
Vim tias OD raug kho, lub sij hawm hnyav dua txhais tau hais tias lub qhov me me thiab cov yeeb nkab hnyav dua ib 'meter'. Rau cov hlau tsis muaj steel, cov sij hawm "S" (5S, 10S, 40S, 80S) yog cov uas siv rau hauv cov txheej txheem cov nroj tsuag, thiab cov phab ntsa thicknesses tau teev nyob rau hauv ASME B36.19.
Cov yeeb nkab sab nraud ntawm lub rooj yog zoo ib yam rau B36.10, tab sis cov phab ntsa stainless hlau txawv me ntsis ntawm cov txheej txheem carbon steel hauv qee qhov ntau thiab tsawg, uas yog vim li cas cov yeeb nkab stainless kos duab yuav tsum hais txog B36.19 es tsis xav tias B36.10 phab ntsa.
Yuav ua li cas lub raj sizing system ua haujlwm
Tube tsis muaj sijhawm teem sijhawm thiab tsis kho sab nraud - kab lus. Tus neeg yuav khoom qhia txog lub cheeb sab nraud thiab phab ntsa thickness meej meej - 25.4 hli x 1.65 hli, 12.7 hli x 1.0 hli, los yog 6.35 hli x 0.89 hli - thiab zeb ua raws nraim li qhov ntev.
Vim hais tias qhov ntev yog qhov tseeb, lub raj kam rau ua kuj tau qhia raws li qhov tseem ceeb tshaj li qhov feem pua ntawm cov sij hawm: ib lub raj sab nraud txoj kab uas hla yog feem ntau +/- 0.10 hli lossis +/-0.05 hli nyob ntawm qhov tshwj xeeb thiab qhov loj me, hos cov yeeb nkab sab nraud txoj kab uas hla kam rau ua yog feem pua ntawm nominal OD.
Qhov no yog qhov sib txawv ntawm qhov kam rau ua uas ua rau feem ntau cov specification mix-ups. ASTM A312 yeeb nkab tau tso cai rau sab nraud - txoj kab uas hla ntawm qhov siab ntawm li +/-1% (feem ntau +/- 0.5 hli ntawm 25 hli yeeb nkab), vim tias nws tau ua rau lub npe nominal.
ASTM A269 tube tuav lub zog sab nraud ntawm txoj kab uas hla ntau dua - feem ntau +/-0.10 hli ntawm qhov loj me - vim tias cov raj feem ntau siv hauv cov khoom siv hluav taws xob uas lub raj yuav tsum muab khi rau hauv ib lub raj thiab qhov chaw ntawm txoj kab uas hla sab hauv tswj tau ntws. Cov khoom siv tib yam, tib lub zeb, tuaj yeem xa mus rau ob qho tib si qauv, thiab qhov kev kam rau siab yog qhov hloov pauv.
Cov qauv siv rau txhua yam khoom
Cov khoom siv qib yuav zoo ib yam, tab sis cov qauv khoom raug xaiv los ntawm daim ntawv thov:
- Cov yeeb nkab: ASTM A312 (seamless thiab welded austenitic yeeb nkab), A358 (hluav taws xob- fusion-welded loj- txoj kab uas hla), A790 (duplex thiab super duplex yeeb nkab), A928 (EFW duplex)
- Tube: ASTM A269 (seamless thiab welded austenitic raj rau dav thiab tshav kub- kev pab cuam pauv), A213 (seamless ferritic thiab austenitic boiler raj), A789 (seamless thiab welded duplex raj), A511 / A554 (mechanical raj)
- Tubing liab qab rau kev ntsuas: A269 yog lub neej ntawd; rau hydraulic thiab instrumentation kab A269 nrog ib tug du bore yog feem ntau teev
Thaum nug hais tias "316l cev", tus neeg muag khoom yuav nug rau OD x phab ntsa thiab tus qauv; thaum nws hais tias "316L yeeb nkab", tus neeg muag khoom yuav nug NPS thiab lub sijhawm. Ib qho kev nug tiav hais txog ob qho tib si cov khoom thiab cov qauv, vim hais tias "tube rau A312" yog contradictory thiab "pipe rau A269" kuj yog contradictory - tus qauv nws tus kheej txhais cov khoom.
Kev ntsuas siab thiab qhov ua tau zoo
Rau kev tsim lub siab, cov yeeb nkab yog xam los ntawm cov kav dej siv cov txheej txheem ntawm phab ntsa thiab qhov tso cai rau kev ntxhov siab. Tube siv nyob rau hauv lub tshav kub exchanger los yog ib tug instrument kab yog xam nrog rau cov phab ntsa, thiab vim hais tias cov phab ntsa yog raws nraim es tsis yog nominal, tus tsim margin yog pom ntau dua. Hauv kev xyaum, tib cov khoom ntawm tib phab ntsa nqa tib lub siab txawm tias nws yog hu ua yeeb nkab lossis raj; qhov txawv yog nyob rau hauv yuav ua li cas qhov ntev yog txiav txim thiab xyuas, tsis nyob rau hauv lub physics.
Dab tsi hloov pauv ntawm kev lag luam yog tus nqi: cov yeeb nkab tau hais hauv ib lub 'meter' los ntawm NPS thiab lub sij hawm, lub raj xa tawm ib 'meter' los ntawm OD x phab ntsa, thiab tib lub raj lub cev tuaj yeem pheej yig dua los yog dearer tshaj cov yeeb nkab ntawm qhov sib npaug ntawm qhov sib npaug ntawm cov khoom sib tov ntawm zeb.
Yuav sau dab tsi ntawm qhov kev nug: tsib lub teb uas xaus qhov tsis meej pem
Kev nug cov yeeb nkab / raj yog qhov tsis meej thaum nws muaj tsib yam khoom no:
- Cov lus thiab cov qauv: "pipe rau ASTM A312" lossis "tube rau ASTM A269" - yeej tsis yog "316L yeeb nkab / raj"
- Qhov loj hauv qhov system raug: NPS + lub sijhawm rau cov yeeb nkab (piv txwv li NPS 2 SCH 40S), OD x phab ntsa hauv mm rau raj (piv txwv li . 25.4 x 1.65 mm)
- Qib thiab mob: piv txwv li TP316L, annealed, los yog "txias drawn, annealed" rau raj
- Ntev thiab kawg tiav: tsau 6 m lengths, tiaj kawg lossis beveled kawg, txiav lengths rau raj
- Daim ntawv pov thawj yuav tsum tau: EN 10204 3.1, thiab cov chav kawm ntawv qhov ntev yog tias daim ntawv thov tseem ceeb (xws li cua sov- lub raj xa hluav taws xob)
Cov neeg yuav khoom uas sau tsib daim teb no ntawm qhov kev nug tau txais cov lus hais uas sib piv thiab cov khoom xa tuaj uas haum. Cov neeg yuav khoom uas sau "316L seamless 25.4 mm yeeb nkab" lossis "2 inch raj" tau txais kev hu xovtooj rov qab, kev qhia meej, thiab feem ntau yog kev xa khoom tsis raug lossis qeeb. Tus nqi ntawm qhov kev qhia meej me me; tus nqi ntawm qhov tsis ncaj ncees lawm dimension tuaj txog ntawm qhov chaw tsis yog.
FAQ
Q: Puas yog cov yeeb nkab muaj zog dua lub raj ntawm cov khoom qub?
A: Tsis yog. Lub zog yog nyob ntawm qib thiab phab ntsa thickness, tsis yog ntawm cov khoom lo lus. Cov yeeb nkab thiab raj hauv tib qib thiab phab ntsa nqa tib lub siab; qhov txawv yog qhov sizing thiab kam rau ua, tsis yog lub zog.
Q: Kuv puas tuaj yeem siv lub raj tsis siv cov yeeb nkab rau cov txheej txheem?
A: Tsuas yog tias qhov ntev tau teev nyob rau hauv cov yeeb nkab system (NPS + lub sijhawm) thiab tus qauv npog cov khoom. Ib lub raj ntawm OD thiab phab ntsa tuaj yeem hloov pauv rau cov yeeb nkab uas cov cai tso cai, tab sis cov fittings, flanges, thiab kam rau ua yog txawv, yog li kev hloov pauv yuav tsum tau kuaj xyuas tus qauv ua ntej yuav khoom.
Q: Qhov txawv ntawm NPS thiab OD yog dab tsi?
A: NPS yog cov yeeb nkab nominal loj - lub npe, tsis yog qhov loj me. NPS 2 yeeb nkab yog 60.3 hli sab nraud txoj kab uas hla, tsis yog 50.8 hli. OD yog kho los ntawm lub rooj loj hauv ASME B36.10 / B36.19. Tsis txhob muab NPS los ntawm 25.4 kom tau txais cov yeeb nkab OD.
Q: Vim li cas cov yeeb nkab tolerances nruj dua li cov yeeb nkab kam rau ua?
A: Vim tias lub raj siv nyob qhov twg qhov loj me yog ua haujlwm - tshav kub-exchanger tube seals rau hauv cov ntawv, cov raj ntsuas yuav tsum haum rau compression fittings. Cov yeeb nkab tolerances yog feem pua ntawm nominal qhov ntau thiab tsawg; tube tolerances yog qhov tseem ceeb xws li +/- 0.10 mm.
Q: Puas yog A312 npog raj?
A: Tsis yog ASTM A312 npog seamless thiab welded austenitic yeeb nkab nkaus xwb. Tube yog them los ntawm A269, A213, A789 thiab lwm yam qauv. Kev txiav txim "tube rau A312" yuav tsis tsim ib daim ntawv pov thawj tube.
Q: SCH 40S txhais li cas ntawm cov yeeb nkab stainless?
A: SCH 40S yog lub sijhawm stainless hlau 40 phab ntsa rau ASME B36.19. Lub "S" txawv ntawm lub rooj zaum stainless hlau los ntawm carbon steel B36.10 lub rooj, uas txawv ntawm qee qhov ntau thiab tsawg.
