API 5L X70 (L485)yog ib hom yeeb nkab steel siv nyob rau hauv kev lag luam roj thiab roj rau kev thauj mus los hauv cov kav dej, muaj npe tom qab nws qhov tsawg kawg nkausyield zog ntawm 70,300 psi (485 MPa), thiab muaj ob qho tib si seamless thiab welded yeeb nkab cov ntaub ntawv thiab muab faib ua ob yam khoom specification, PSL1 thiab PSL2.Hauv PSL1, X70 yog qib siab tshaj plaws, thaum nyob rau hauv PSL2 nws kuj yog ib qho ntawm cov qib siab ntawm cov yeeb nkab steel.
API 5L X70 steel yeeb nkab yog tshwj xeeb tshaj yog haum rau cov kev xav tau ntawm kev thauj mus los ntev, kev kub ntxhov vim nws lub zog siab thiab siab ua haujlwm.Txhawm rau tiv thaiv kev kub ntxhov siab dua, X70 steel yeeb nkab feem ntau tsim nrog cov phab ntsa tuab kom ntseeg tau tias muaj zog txaus thiab kav ntev.
Botop Steelyog ib lub chaw tsim khoom ntawm tuab-walled loj-inch ob-sided submerged arc LSAW steel yeeb nkab nyob rau hauv Suav teb.
Qhov chaw: Cangzhou City, Hebei Province, Suav teb;
Kev nqis peev tag nrho: 500 lab RMB;
Factory cheeb tsam: 60,000 square meters;
Muaj peev xwm tsim tau txhua xyoo: 200,000 tons ntawm JCOE LSAW steel kav;
Khoom siv: Advanced ntau lawm thiab cov khoom siv kuaj;
Tshwj xeeb: LSAW steel yeeb nkab ntau lawm;
Daim ntawv pov thawj: API 5L tau ntawv pov thawj.
Kev Xa Khoom
Kev xa khoom yog qhov kub-kho lossis ua tiav lub xeev ntawm lub raj steel thaum nws npaj tau xa mus rau cov neeg siv khoom tom qab kev tsim khoom.Kev xa khoom yog qhov tseem ceeb kom ntseeg tau tias lub raj muaj qhov xav tau cov khoom siv kho tshuab thiab kev ua haujlwm zoo.
Nyob ntawm qib PSL thiab kev xa khoom, X70 tuaj yeem faib raws li hauv qab no:
PSL1: X70 (L485);
PSL2: X70Q (L485Q) thiab X70M (L485M);
PSL2 cov ntawv tom qab Q thiab M sawv rau feem:
Q: quenched thiab tempered;
M: Thermomechanical dov los yog thermomechanical tsim;
API 5L X70 Cov Txheej Txheem Ua Tau Zoo
Cov txheej txheem tsim khoom X70 suav nrog ob qho tib siseamless thiab weldedcov ntawv, uas tuaj yeem categorized li:
Ntawm no,SAWL(LSAW) yog cov txheej txheem feem ntau siv hauv kev tsim cov txheej txheem X70 welded thiab muaj txiaj ntsig zoo hauv kev tsim cov kab loj loj, tuab-walled dimensional steel yeeb nkab.
Txawm hais tias seamless steel kav tseem suav tias yog qhov kev xaiv zoo tshaj plaws vim lawv cov yam ntxwv nyob rau hauv qee qhov xwm txheej, qhov siab tshaj plaws ntawm cov kav dej seamless steel tsim feem ntau txwv rau 660 hli.Qhov kev txwv loj no tuaj yeem muaj teeb meem thaum ntsib nrog cov phiaj xwm kev thauj mus los ntev.
Hauv qhov sib piv, cov txheej txheem LSAW muaj peev xwm ua tau cov raj uas muaj txoj kab uas hla mus txog 1,500 hli thiab phab ntsa thickness txog li 80 hli.Thiab tus nqi tuaj yeem raug nqi ntau dua li seamless steel.
API 5L X70 Cov Khoom Siv Tshuaj
Chemical Composition rau PSL 1 Pipe nrog t ≤ 25.0 mm (0.984 in.)
Chemical Composition rau PSL 2 Pipe nrog t ≤ 25.0 mm (0.984 in.)
Rau PSL2 steel yeeb nkab khoom soj ntsuam nrog acarbon cov ntsiab lus ≤0.12%, carbon sib npaug CEpcm uatuaj yeem suav nrog cov qauv hauv qab no:
CEpcm ua= C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/15 + 5B
Rau PSL2 steel yeeb nkab khoom soj ntsuam nrog aCov ntsiab lus carbon> 0.12%, carbon sib npaug CElwjtuaj yeem suav nrog cov qauv hauv qab no:
CElwj= C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
Chemical Composition nrog t ＞ 25.0 mm (0.984 nyob rau hauv.)
Nws yuav tsum tau txiav txim siab los ntawm kev sib tham thiab hloov kho kom haum raws li cov txheej txheem tshuaj muaj pes tsawg leeg saum toj no.
API 5L X70 Mechanical Properties
Tensile Properties
PSL1 X70 Tensile Properties
PSL2 X70 Tensile Properties
Nco tseg: Cov kev xav tau nthuav dav hauvAPI 5L X52, uas tuaj yeem pom yog tias xav tau.
Lwm yam Mechanical Experiments
Cov kev sim hauv qab nosiv rau SAW steel yeeb nkab hom nkaus xwb.
Weld qhia dabtsi yog khoov kuaj;
Cold-formed welded yeeb nkab hardness kuaj;
Macro soj ntsuam ntawm welded seam;
thiab tsuas yog rau PSL2 steel yeeb nkab: CVN cuam tshuam kuaj thiab DWT xeem.
Cov khoom kuaj thiab ntsuas zaus rau lwm hom yeeb nkab tuaj yeem pom hauv Cov Lus 17 thiab 18 ntawm API 5L tus qauv.
Hydrostatic Test
Lub Sijhawm Xeem
Txhua qhov ntau thiab tsawg ntawm seamless thiab welded steel hlab nrog D ≤ 457 mm (18 in.):xeem lub sij hawm ≥ 5s;
Welded steel yeeb nkab D> 457 mm (18 nyob rau hauv.):xeem lub sij hawm ≥ 10s.
Kev sim ntau zaus
Txhua cov yeeb nkab steelthiab yuav tsum tsis txhob muaj qhov xau los ntawm qhov vuam lossis cov yeeb nkab lub cev thaum lub sijhawm kuaj.
Kev sim siab
Kev ntsuas hydrostatic siab P ntawm aplain-end steel yeeb nkabtuaj yeem suav tau los ntawm kev siv cov mis.
P = 2st/D
Syog lub hoop stress.tus nqi yog sib npaug rau qhov tsawg kawg nkaus tawm lub zog ntawm cov yeeb nkab steel xa feem pua, hauv MPa (psi);
tyog lub thickness ntawm phab ntsa, qhia nyob rau hauv millimeters (inch);
Dyog qhov teev sab nraud txoj kab uas hla, qhia hauv millimeters (inch).
Kev tshuaj xyuas tsis zoo
Rau SAW tubes, ob txoj kev,UT(ultrasonic testing) los yogRT(radiographic kuaj), feem ntau yog siv.
ET(electromagnetic testing) tsis siv rau SAW raj.
Welded seams ntawm welded kav ntawm qib ≥ L210 / A thiab txoj kab uas hla ≥ 60.3 mm (2.375 hauv) yuav tsum tsis txhob raug tshuaj xyuas kom tag nrho tuab thiab ntev (100%) raws li tau teev tseg.
UT cov kev xeem tsis muaj kev puas tsuaj
RT kev kuaj xyuas tsis muaj kev puas tsuaj
Rau SAW thiab COW yeeb nkab, cov welds yuav tsum tau tshuaj xyuas los ntawm kev soj ntsuam hluav taws xob hauv qhov tsawg kawg nkaus ntawm 200 mm (8.0 in) ntawm txhua lub yeeb nkab kawg.nyob rau hauv) ntawm txhua cov yeeb nkab kawg yuav tsum tau soj ntsuam los ntawm kev tshuaj ntsuam radiographic.
API 5L Pipe Schedule Chart
Txhawm rau kom yooj yim saib thiab siv, peb tau teeb tsa cov sijhawm teem sijhawm rau PDF cov ntaub ntawv.Koj tuaj yeem rub tawm thiab saib cov ntaub ntawv no yog tias xav tau.
Qhia tawm sab nraud thiab phab ntsa Thickness
Cov nqi tsim nyog rau kev teev sab nraud diameters thiab teev cov phab ntsa thicknesses ntawm cov yeeb nkab steel yog muab rau hauvISO 4200 UASthiabASME B36.10M.
Dimensional Tolerances
API 5L qhov yuav tsum tau ua rau qhov ntev ntev yog cov ncauj lus kom ntxaws hauvAPI 5L Qib B.Txhawm rau kom tsis txhob rov ua dua, koj tuaj yeem nyem rau ntawm daim ntawv xiav kom pom cov ntsiab lus cuam tshuam.
Common Defects thiab Kho
Rau SAW raj, feem ntau pom muaj qhov tsis xws luag: nibbled npoo, arc hlawv, delamination, geometric deviations, nyuaj lumps, thiab lwm yam.
Qhov tsis zoo pom los ntawm kev tshuaj xyuas qhov muag yuav tsum raug txheeb xyuas, categorized, thiab muab pov tseg raws li hauv qab no.
a) Qhov tob ≤ 0.125t, thiab tsis cuam tshuam rau qhov tsawg kawg nkaus tso cai phab ntsa thickness ntawm qhov tsis xws luag yuav tsum tau txiav txim siab raws li qhov tsis xws luag thiab yuav tsum muab pov tseg raws li cov kev cai ntawm C.1.
b) Qhov tsis xws luag > 0.125t hauv qhov tob uas tsis cuam tshuam rau qhov tsawg kawg nkaus tso cai phab ntsa tuab yuav tsum raug txiav txim siab tias muaj qhov tsis xws luag thiab yuav tsum tau muab tshem tawm los ntawm kev rov ua dua tshiab raws li C.2 lossis pov tseg raws li C.3.
c) Qhov tsis xws luag cuam tshuam rau qhov tsawg kawg nkaus tso cai phab ntsa tuab yuav tsum raug lees paub tias yog qhov tsis xws luag thiab yuav tsum muab pov tseg raws li C.3.
Xim ID
Yog tias thov, kos xim ntawm kwv yees li 50 hli (2 nti) hauv txoj kab uas hla tuaj yeem pleev xim rau ntawm sab hauv ntawm txhua cov yeeb nkab steel kom yooj yim sib txawv ntawm cov khoom sib txawv.
| Qib Qib | Xim Xim |
| L320 los yog X46 | Dub |
| L360 los yog X52 | Ntsuab |
| L390 los yog X56 | Xiav |
| L415 los yog X60 | Liab |
| L450 los yog X65 | Dawb |
| L485 los yog X70 | Ntshav-violet |
| L555 los yog X80 | Daj |
X70 Steel sib npaug rau dab tsi?
TS EN ISO 3183-L485: Qhov no yog cov yeeb nkab steel raws li cov qauv thoob ntiaj teb thiab zoo sib xws hauv cov khoom rau API 5L X70.
CSA Z245.1 - GR 485: Qhov no yog Canadian Standards Association steel qib rau cov roj thiab cov kav dej.
EN 10208-2 - L485MB: Qhov no yog cov yeeb nkab steel raws li European Standard rau kev tsim cov kav dej rau kev thauj mus los ntawm cov roj thiab roj.
Txheej
Peb tsis tsuas yog muab peb cov neeg siv khoom zoo X70 steel kav, tab sis kuj muaj ntau hom kev pabcuam txheej txheej kom tau raws li cov kev xav tau tshwj xeeb ntawm cov haujlwm sib txawv.
Xim coatings: Cov xim pleev xim ib txwm muab kev tiv thaiv kev tiv thaiv corrosion thiab tsim nyog rau qhov chaw tsis muaj huab cua lossis tiv thaiv ib ntus.
FBE txheej: Siv rau saum npoo ntawm cov yeeb nkab steel los ntawm electrostatic txau txheej txheem thiab tom qab ntawd kho los ntawm tshav kub.Cov txheej no muaj cov tshuaj lom neeg zoo thiab ua kom tsis zoo thiab tsim nyog rau cov kav dej hauv av lossis hauv qab dej.
3 LPE txheej: Muaj txheej txheej epoxy, txheej nplaum, thiab txheej txheej polyethylene, nws muab kev tiv thaiv corrosion zoo heev thiab kev tiv thaiv txhua yam rau ntau yam kev thauj mus los hauv av.
3 LPP txheej: Zoo ib yam li 3LPE, 3LPP txheej muaj peb txheej, tab sis siv polypropylene ua txheej txheej.Cov txheej no muaj kev tiv thaiv kub siab dua thiab tsim nyog rau cov kav dej hauv qhov chaw kub kub.
Cov txheej txheej tuaj yeem raug xaiv raws li qhov tshwj xeeb ntawm daim ntawv thov ib puag ncig thiab cov kev xav tau ntawm cov raj xa dej kom ntseeg tau tias muaj kev ntseeg siab thiab kev nyab xeeb ntawm API 5L X70 kav dej thaum lub sijhawm ua haujlwm.
Yog vim li cas xaiv peb rau X70 Steel Pipe
1. API 5L certified factories: Peb cov chaw tsim khoom tuav API 5L ntawv pov thawj, uas ua kom cov qauv zoo los ntawm qhov chaw mus rau cov khoom tiav nrog tus nqi kom zoo dua.
2. Ntau hom yeeb nkab: Peb tsis yog tsuas yog cov chaw tsim khoom ntawm welded steel kav, tab sis kuj yog ib qho chaw tsim khoom ntawm seamless steel kav, thiab peb tuaj yeem muab ntau hom yeeb nkab uas tuaj yeem ua tau raws li cov kev xav tau ntawm cov haujlwm sib txawv.
3. Ua kom tiav cov cuab yeej txhawb nqa: Ntxiv rau cov yeeb nkab steel, peb kuj tuaj yeem muab cov flanges, lub luj tshib, thiab lwm yam khoom siv txhawb nqa, muab ib qho kev daws teeb meem rau koj qhov project.
4. Kev pabcuam customized: Peb muaj peev xwm muab cov kev daws teeb meem raws li cov neeg siv khoom xav tau tshwj xeeb, suav nrog kev tsim thiab ua cov kav hlau steel nrog cov lus tshwj xeeb.
5. Cov kev pabcuam tshwj xeeb: Txij li thaum nws tsim nyob rau hauv 2014, lub tuam txhab tau koom nyob rau hauv ib tug xov tooj ntawm engineering tej yaam num thiab sau nplua nuj nyob rau hauv kev lag luam, ua kom nws muab tshwj xeeb kev pab cuam thiab kev txhawb nqa.
6. Kev teb sai thiab kev txhawb nqa: Peb pab neeg muab kev pabcuam tuaj yeem muab cov lus teb sai thiab kev pabcuam tshaj lij los xyuas kom meej tias koj cov teebmeem thiab kev xav tau raug daws raws sijhawm.
