ASTM A53 Qib B Hom E yeeb nkab yog cov khoom siv dav dav tshaj plaws carbon steel yeeb nkab hauv ntiaj teb. Nws npog cov hluav taws xob tiv thaiv welded (ERW) yeeb nkab uas tsim los ntawm steel coil nrog ib tug longitudinal weld uas tsis muaj hlau muab tub lim, thiab nws yog muab nyob rau hauv dub los yog kub -dipped galvanized tiav. Vim tias nws sib txuas cov khoom siv vuam zoo, cov cuab yeej siv tau zoo, thiab kev tsim khoom lag luam, A53 Qib B ERW yeeb nkab yog qhov kev xaiv zoo rau kev siv dav dav, kev siv tshuab, thiab cov kav dej.
Nkag siab lub npe A53
ASTM A53, Standard Specification rau Yeeb Nkab, Hlau, Dub thiab Kub -Dipped, Zinc-Coated, Welded thiab Seamless, siv lub compact designation system. Txhua lub ntsiab lus ntawm lub npe qhia tus neeg yuav khoom tias cov yeeb nkab yog dab tsi thiab nws tau ua li cas.
| Ib feem | Lub ntsiab lus |
|---|---|
| ASTM | ASTM International, tus qauv lub cev uas teeb tsa qhov tshwj xeeb |
| A53 | Standard specification rau dub thiab kub -dipped zinc-coated, welded thiab seamless steel yeeb nkab |
| Qib B | Qib muaj zog nrog cov khoom siv kho tshuab siab dua qib A |
| Hom E | Hluav taws xob kuj welded, tsim los ntawm coil thiab welded longitudinally yam tsis muaj muab tub lim hlau |
Hom E yog hom kev xaj ntau tshaj plaws vim tias ERW ntau lawm yog tas li, tsis sib xws, thiab tus nqi -zoo ntawm ntim. Hom F rauv taub qab welded thiab Hom S seamless kuj tau them los ntawm tib tus qauv thiab qhia tib qib qib A thiab qib B lub zog.
Chemical Composition Requirements
Cov chemistry ntawm Qib B yog sib npaug rau lub zog, weldability, thiab formability. Cov kev txwv hauv qab no siv rau kev ntsuas kub ntawm cov hlau.
| Element | Ntau tshaj % | Nco tseg |
|---|---|---|
| Cov pa roj carbon (C) | 0.30 | Siab dua qib A kom muaj zog ntxiv |
| Manganese (Mn) | 1.20 | Ntxiv zog thiab hardenability |
| Phosphorus (P) | 0.05 | Tswj rau weldability |
| Sulfur (S) | 0.045 | Tswj kom toughness |
| Copper (Cu) | 0.40 | Cov khoom seem |
| Nickel (Ni) | 0.40 | Cov khoom seem |
| Chromium (Cr) | 0.40 | Cov khoom seem |
| Molybdenum (hli) | 0.15 | Cov khoom seem |
| Vanadium (V) | 0.08 | Cov khoom seem |
Cov pa roj carbon tsawg tsawg thiab cov kev tswj xyuas nruj ruaj khov ua rau thaj tsam weld ductile, uas yog vim li cas A53 Qib B ERW yeeb nkab yog niaj hnub welded nyob rau hauv lub tshav pob yam tsis muaj preheat raws li cov txheej txheem txheem.
Mechanical Properties
| Khoom | Qib A | Qib B |
|---|---|---|
| Yam tsawg kawg yield zog | 205 MPa (30,000 psi) | 240 MPa (35,000 psi) |
| Tsawg kawg tensile zog | 330 MPa (48,000 psi) | 415 MPa (60,000 psi) |
| Tsawg kawg elongation hauv 2 hauv (50 mm) | 30% | 20% |
| Cov ntsiab lus carbon, max | 0.25% | 0.30% |
Qib B yog qhov kev xaiv ua ntej rau kev pabcuam siab vim tias nws xa tawm kwv yees li 17 feem pua ntawm cov txiaj ntsig ntau dua li Qib A ntawm tus nqi yuav luag zoo tib yam. Qib A tseem siv tau tsuas yog qhov kev qhia tshwj xeeb ntawm qhov qub lossis ib qho kev tsim tshwj xeeb xav tau hu rau nws.
Yuav ua li cas ERW Yeeb Nkab raug tsim
ERW ntau lawm pib nrog steel kauj. Lub kauj yog unrolled, leveled, thiab ntug- trimmed, ces txias - ua rau ib tug cylindrical zoo. High- zaus hluav taws xob tam sim no heats ob npoo rau vuam kub, thiab cov npoo raug nias ua ke los ua ib qho forge vuam. Tsis muaj cov hlau muab tub lim ntxiv, thiab thaj tsam weld yog qhov txawv ntawm lub hauv paus hlau tom qab ua tiav. Cov yeeb nkab yog qhov loj me, ncaj, txiav kom ntev, thiab, thaum xav tau, kho cua sov thiab kub -dip galvanized.
Cov txheej txheem siab - zaus hloov qis- zaus ERW nyob rau xyoo 1970 thiab tshem tawm cov teeb meem kev sib txhuam ntawm cov seam corrosion cuam tshuam nrog cov txheej txheem qub. Niaj hnub no A53 Hom E welds raug tshuaj xyuas hauv kab thiab txheeb xyuas los ntawm hydrostatic lossis tsis yog -kev ntsuas kev puas tsuaj uas yuav tsum tau ua los ntawm tus qauv.
Qhov ntau thiab tsawg, Teem caij, thiab Tolerances
A53 npog cov yeeb nkab los ntawm NPS 1/8 txog NPS 26, nrog phab ntsa thicknesses txhais los ntawm lub sijhawm teem sijhawm. Cov sij hawm ua lag luam feem ntau yog 10, 40, 80, 160, thiab XXS, thiab cov yeeb nkab tuaj yeem raug txiav txim rau hauv ib qho random, ob chav random, los yog txiav ntev nrog dawb, beveled, los yog threaded xaus.
| Parameter | Ua siab ntev | Kev siv tau |
|---|---|---|
| Sab nraud txoj kab uas hla, mus txog 48.3 mm | ± 0.40 hli | Txhua hom |
| Sab nraud txoj kab uas hla, 60.3 hli thiab tshaj | ±1% | Txhua hom |
| Phab ntsa thickness | ± 12.5% ntawm nominal | Hom S, E, thiab F |
| Qhov hnyav | ± 10% rau qhov ntau | Kev txiav txim lag luam |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.3% ntawm qhov ntev | Length tshaj 6 m |
Cov kab loj dua li ntawm NPS 26 txwv yog tsim los ua LSAW lossis SSAW yeeb nkab raws li lwm cov qauv xws li ASTM A252, API 5L, lossis EN 10217, nyob ntawm daim ntawv thov.
Kev kuaj thiab tshuaj xyuas
| Kuaj | Lub hom phiaj |
|---|---|
| Hydrostatic xeem | Txheeb xyuas qhov tseeb siab ntawm txhua cov yeeb nkab; siab yog xam los ntawm tus qauv qauv thiab tuav tsawg kawg yog 5 vib nas this, los yog 10 vib nas this thaum teev |
| Kev ntsuam xyuas | Paub meej ductility thiab weld kev ncaj ncees ntawm welded yeeb nkab |
| Khoov xeem | Txheeb xyuas cov qauv ntawm cov yeeb nkab NPS 2 thiab me dua |
| Tsis yog -kev kuaj kev puas tsuaj | Ultrasonic los yog eddy- kev kuaj tam sim no tau txais los ua lwm txoj hauv kev kuaj hydrostatic thaum pom zoo ntawm kev xaj |
Mill daim ntawv pov thawj qhia txog cov cua sov chemistry, cov txiaj ntsig tensile, thiab kev sim ua raws li txhua qhov ntau, thiab ib txwm xav tau rau kev txiav txim siab.
Cov ntawv thov siv
| Daim ntawv thov | Yam Lus Qhia |
|---|---|
| Roj thiab roj kis tau tus mob | Cov kab khiav, sib sau ua ke, nruab nrab -siab faib |
| Kev faib dej | Municipal water supply, irrigation systems |
| Kev tiv thaiv hluav taws | Sprinkler piping, nquag galvanized |
| Chav thiab cua kab | Tsawg mus rau nruab nrab -siab chav thiab compressed cua |
| Kev siv tus qauv | Fencing, handrails, scaffolding, bollards |
| Kev siv hluav taws xob dav dav | Txheej txheem dej, cua txias systems |
A53 Qib B ERW vs Seamless Yeeb Nkab
Seamless Type S yeeb nkab yog pierced los ntawm ib tug khoom billet thiab tsis muaj longitudinal weld, uas tshem tawm tej kev txhawj xeeb txog seam ncaj ncees nyob rau hauv siab - siab los yog cyclic kev pab cuam. Nws kuj tseem yog hom A53 tso cai ntawm qhov ntsuas kub siab dua, feem ntau txog li 400℃hauv qab cov qauv tsim cov lej, thaum Hom E ERW feem ntau txwv rau txog 340 degree. Raws li ASME B31.3, qhov sib koom ua ke ntawm kev sib koom ua haujlwm rau A53 Hom E yog 0.85 tshwj tsis yog tias lub seam yog 100 feem pua tau tshuaj xyuas, nyob rau hauv rooj plaub no qhov tshwm sim nce mus rau 1.0. Thaum ib qhov project xav tau qhov ntsuas siab tshaj plaws, kev pabcuam kub siab, lossis lub luag haujlwm qaub, seamless yeeb nkab lossis tus qauv siab xws li ASTM A106 lossis API 5L feem ntau tau teev tseg.
FAQ
Qhov txawv ntawm A53 Qib A thiab Qib B yog dab tsi?
Qib B muaj qhov tsawg kawg nkaus tawm lub zog ntawm 240 MPa (35,000 psi) thiab lub zog tensile yam tsawg kawg nkaus ntawm 415 MPa (60,000 psi), piv nrog 205 MPa (30,000 psi) thiab 330 MPa (48,000 psi) rau Qib A. Qib B kuj muaj kev txwv me ntsis ntawm 0. 0.25% rau Qib A.
Hom E txhais li cas hauv ASTM A53?
Hom E qhia txog cov hluav taws xob tiv thaiv welded yeeb nkab, tsim los ntawm steel kauj nrog ib tug longitudinal weld ua los ntawm siab - zaus tam sim no thiab tsis muaj hlau muab tub lim. Nws yog hom ntau tshaj plaws vim nws cov khoom zoo sib xws thiab kev lag luam.
A53 Qib B ERW yeeb nkab puas tuaj yeem siv rau kev pabcuam siab?
Yog lawm. A53 Qib B Hom E yog dav siv nyob rau hauv qis mus rau nruab nrab -lub zog dej, cua, chav, thiab hluav taws xob tiv thaiv. Raws li ASME B31.3 qhov kev sib koom ua ke ntawm kev sib koom ua haujlwm yog 0.85 rau ERW seam, thiab txhua cov yeeb nkab tau sim hydrostatically ntawm lub zeb.
Dab tsi yog qhov txawv ntawm ASTM A53 thiab ASTM A106?
A53 npog welded thiab seamless yeeb nkab dub thiab galvanized tiav rau kev pabcuam. A106 npog seamless carbon steel yeeb nkab nkaus xwb, rau siab - kub siab kev pab cuam, nrog rau guaranteed tensile thiab yield hnab ntawv thiab nruj chemistry. A106 yog qhov zoo dua qhov uas tus qauv tsim kub tshaj qhov txwv ntawm A53 ERW.
Puas yog A53 yeeb nkab muaj galvanized?
Yog lawm. A53 yeeb nkab tuaj yeem raug txiav txim dub lossis kub -dipped galvanized nyob rau hauv tag nrho peb hom. Galvanized yeeb nkab yog tus qauv rau cov tshuab nqus dej thiab cov kab dej sab nraum zoov, thaum cov yeeb nkab dub siv qhov twg cov kab yuav raug pleev xim, qhwv, lossis insulated.
Qhov luaj li cas thiab lub sijhawm teem caij A53 npog li cas?
A53 npog NPS 1/8 txog NPS 26 nrog rau cov sijhawm ua lag luam 10, 40, 80, 160, thiab XXS, hauv ib qho random, ob chav random, lossis txiav ntev nrog cov tiaj, beveled, lossis threaded kawg.
