Carbon Steel Yeeb Nkab: Cov Txheej Txheem Txheej Txheem Ua Haujlwm Ua Haujlwm
Carbon steel yeeb nkabyog cov khoom siv tubular ua los ntawm cov hlau -carbon alloy nrog cov ntsiab lus carbon txog 2.1% los ntawm qhov hnyav. Ib qho tseem ceeb tshaj plaws kev ntsuas tsis yog cov ntsiab lus carbon: raws li carbon nce, hardness thiab lub zog nce thaum ductility thiab weldability txo. Qhov kev lag luam no-tawm tsav txhua qhov kev txiav txim siab downstream - los ntawm kev xaiv qib mus rau vuam txheej txheem thiab qib tshuaj ntsuam xyuas.
1. Cov ntsiab lus carbon thiab kev faib yeeb nkab
| Carbon Steel Hom | Cov ntsiab lus carbon | Cov yam ntxwv tseem ceeb | Kev siv yeeb nkab |
|---|---|---|---|
| Tsawg Carbon (Mild Steel) | Tsawg dua lossis sib npaug li 0.25% | Zoo weldability, zoo ductility, tsis tshua muaj nqi | A53, A106 Gr. B, API 5L Gr. B - X70 |
| Nruab nrab Carbon | 0.25% - 0.60% | Siab zog, nruab nrab weldability | Tshwj xeeb mechanical thiab siab siv |
| Cov pa roj carbon ntau | 0.60% - 2.1% | Nyuaj heev, tsis zoo weldability | Tsis tshua muaj siv rau cov yeeb nkab; feem ntau hnav qhov chaw |
2. Manufacturing Parameters: Seamless vs. Welded
Los ntawm txoj kev tsim khoom, carbon steel yeeb nkab faib ua ob tsev neeg nrog cov kev tsis sib xws.Seamless yeeb nkabyog pierced los ntawm ib tug khoom round billet (Mannesmann txheej txheem, billet rhuab mus rau ~ 1,200 degree) thiab tsis muaj welded seam, muab superior siab ncaj ncees.Welded yeeb nkabyog tsim los ntawm phaj los yog coil:ERW(siab- zaus kuj welding, mus txog ~ 24 in.),LSAW(ncaj longitudinal seam, loj txoj kab uas hla mus txog 120 hauv .+), thiabSSAW(kauv seam, mus txog ~ 3,000 mm, theoretically unlimited ntev).
3. Mechanical and Chemical Parameters at a Glance
| Qib | Tensile zog (min) | Yield zog (min) | Elongation (min) |
|---|---|---|---|
| ASTM A106 Gr. A | 330 MPa (48,000 psi) | 205 MPa (30,000 psi) | 30% longitudinal |
| ASTM A106 Gr. B | 415 MPa (60,000 psi) | 240 MPa (35,000 psi) | 30% / 16.5% transverse |
| ASTM A106 Gr. C | 485 MPa (70,000 psi) | 275 MPa (40,000 psi) | 30% / 16.5% transverse |
| API 5L X52 (PSL1) | 460 MPa rau | 360 MPa | Raws li tus qauv qauv |
| API 5L X65 (PSL1) | 535 MPa ua | 450 MPa | Raws li tus qauv qauv |
Chemistry txiav txim siab weldability thiab toughness ntau npaum li lub zog. Raws li ASTM A106, txhua txhua 0.01% txo qis hauv carbon tso cai rau 0.06% nce hauv manganese (txog 1.35% max), thiab cov khoom seem xws li phosphorus (tsawg dua lossis sib npaug li 0.035%) thiab sulfur (tsawg dua lossis sib npaug li 0.035%) yuav tsum nruj me ntsis txwv vim lawv ua rau tawg.
4. Kev Ntsuas Cov Kev Ntsuas Cov neeg yuav khoom yuav tsum xav tau
Reputable mills validate txhua parameter ua ntej shipping. Cov neeg yuav khoom yuav tsum xav tau ntawm daim ntawv pov thawj zeb xeem (EN 10204 3.1): tshuaj ntsuam xyuas (OES), ntsuas tensile (ASTM A370 / ISO 6892), hydrostatic testing, ultrasonic testing (ASTM E213), eddy tam sim no xeem, flattening thiab dabtsi yog khoov xeem, thiab Charpy V-notch cuam tshuam rau API 5L los yog ntau tshaj 2. PSL2 tseem tswj hwm 100% NDT ntawm txhua cov yeeb nkab.
FAQs
Dab tsi yog qhov txawv ntawm seamless thiab welded carbon steel yeeb nkab?
Seamless yeeb nkab yog pierced los ntawm ib tug khoom billet uas tsis muaj weld seam, muab superior siab ncaj ncees; welded yeeb nkab yog tsim los ntawm sawb lossis phaj thiab welded, ua rau nws yooj yim dua rau cov kab loj loj.
Schedule 40 vs. Teem sijhawm 80 yog dab tsi?
Teem sijhawm hais txog phab ntsa tuab hauv qab ASME B36.10M. Teem sijhawm 80 muaj phab ntsa tuab thiab muaj peev xwm siab dua li Teem 40 ntawm tib lub npe loj, nrog qhov hnyav dua thiab me me hauv kab.
Lub zog ntawm cov pa roj carbon steel yeeb nkab yog dab tsi?
Nws txawv ntawm qib: A106 Gr. A muaj 205 MPa (30 ksi), Gr. B muaj 240 MPa (35 ksi), Gr. C muaj 275 MPa (40 ksi); API 5L X52 xav tau ntau dua lossis sib npaug rau 360 MPa.
Kuv yuav tsum siv tus qauv twg rau siab -kev pabcuam kub?
ASTM A106 tau teev tseg rau seamless carbon steel yeeb nkab nyob rau hauv siab - kub, siab - kev pab cuam xws li boilers thiab refineries; API 5L yog rau roj thiab roj kis kab yeeb nkab.
Yuav ua li cas seamless yeeb nkab tsim?
Lub pob zeb puag ncig yog rhuab mus rau ~ 1,200 degree, pierced rau hauv lub plhaub hollow (Mannesmann nyhuv), ces kub dov rau ntawm ib tug mandrel rau lub hom phiaj txoj kab uas hla thiab phab ntsa, ua raws li los ntawm sizing, straightening, thiab xaiv tau txias txias.
Vim li cas PSL2 kim dua PSL1?
PSL2 ntxiv qhov yuav tsum tau kuaj xyuas, kev txwv cov pa roj carbon sib npaug, qhov siab tshaj plaws yield / tensile caps, nruj dua sulfur thiab phosphorus tswj, thiab 100% tsis yog- kuaj kev puas tsuaj ntawm txhua cov yeeb nkab.
