Yuav ua li cas Common Seamless Pipe yog tsim
Seamless steel yeeb nkab yog tsim los tsis muaj longitudinal los yog helical weld seam, uas ua rau nws nyiam cov khoom rau siab -siab, siab - kub, thiab qaug zog - kev pabcuam tseem ceeb. Txoj kev tsim khoom ntau tshaj plaws yog kub dov, nyob rau hauv uas cov khoom siv puag ncig yog pierced thiab elongated mus rau hauv lub hollow raj, thiab txias xov, uas kub - dov yeeb nkab yog kos los yog dov mus rau nruj qhov ntev thiab zoo dua nto. Cov qauv xws li ASTM A106, API 5L, thiab GB / T 8162 txhais cov qhab nia, qhov ntev, thiab cov kev xav tau ntawm cov yeeb nkab seamless siv hauv boiler, refinery, mechanical, thiab structural service.
Qhov Kub-Rolled Production Route
Kub- dov seamless yeeb nkab yog tsim los ntawm cov cam khwb cia puag ncig. Cov txheej txheem tseem ceeb yog:
Kev tshuaj ntsuam xyuas thiab kev txias, nrog rau kev sib tsoo ntawm qhov tsis xws luag;
Cua sov nyob rau hauv ib tug teb hearth rauv mus rau lub dov kub;
Rotary tho, nyob rau hauv uas lub rhuab billet yog ua hauj lwm tshaj ib tug plug los ua ib tug hollow plhaub;
elongation los ntawm lub mandrel zeb los yog ntsaws zeb kom txo cov phab ntsa thickness thiab nce ntev;
stretch txo los yog sizing mus rau qhov kawg sab nraud txoj kab uas hla;
Txias, ncaj, txiav, thiab xaus kev sib ntsib;
Kev kho cua sov, feem ntau normalizing, qhov twg cov specification yuav tsum tau.
Txhua kauj ruam tuaj yeem qhia txog qhov tsis xws luag yog tias cov txheej txheem tsis sib txawv, uas yog vim li cas qhov zoo -paub meej mills tshuaj xyuas lub billet ua ntej dov thiab sim cov yeeb nkab tiav tom qab nws.
Qhov tsis xws luag ntawm txhua theem ntau lawm
Raw Billet Defects
Nruam casting billets tuaj yeem nqa cov kab nrib pleb, nto slag entrapment, carburization, tooj liab infiltration, central segregation, thiab sab hauv kev sib cais. Cov kev tsis xws no muaj sia nyob rau hauv cov yeeb nkab tiav yog tias lawv tsis raug tshem tawm ua ntej dov. Qhov chaw tsis xws luag feem ntau yog av tawm thaum lub caij txias, thaum kev sib cais sab hauv tuaj yeem tsuas yog tswj tau los ntawm cov khoom pov thawj xws li cua txias thiab electromagnetic stirring.
Kub- Rolling Defects
Kub dov tuaj yeem ua kom paub qhov khawb ntawm qhov chaw, laps, thiab tsis yog -kev sib xws lossis txo cov phab ntsa tuab. Cov yob tsis zoo, hnav cov lus qhia, lossis qhov kub tsis ruaj khov tuaj yeem ua rau eccentricity, qhov twg ib sab ntawm cov yeeb nkab phab ntsa yog nyias dua li lwm qhov. Eccentricity tseem ceeb vim hais tias lub thinnest point tswj lub siab ntsuas.
Kev ua haujlwm thiab cua sov-Kev Kho Mob Tsis Zoo
Tshaj tawm- dov ua tiav tuaj yeem tsim cov kab nrib pleb tawg, cov kab mob tsis zoo los ntawm kev kho cua sov tsis raug, tsis muaj zog tawm los ntawm qis dua - ua, thiab cov xov tsis zoo machining precision ntawm cov yeeb nkab kawg. Kev kho cua sov sib txawv yog qhov tshwj xeeb tshaj yog vim lawv cuam tshuam rau tag nrho cov ntoo khaub lig-section thiab tsis tuaj yeem kho los ntawm kev sib tsoo nto.
Kev Tswj Xyuas Zoo thiab Kev Ntsuas Hydrostatic
Ua ntej tso tawm, cov yeeb nkab seamless raug txheeb xyuas los ntawm kev sib xyaw ua ke ntawm kev sim:
Tshuaj ntsuam xyuas ntawm cov cua sov, thiab cov kev ntsuam xyuas txhua yam ntawm cov qauv xws li tensile, yield, elongation, thiab cuam tshuam qhov twg teev;
Kev ntsuas hydrostatic ntawm txhua qhov ntev, nyob rau hauv uas cov yeeb nkab tau ntim nrog dej thiab nias rau qhov ntsuas qhov ntsuas qhov ntsuas, tus qauv txheej txheem los xyuas qhov tseeb siab;
Tsis yog-kev kuaj xyuas kev puas tsuaj xws li ultrasonic lossis eddy- kev sim tam sim no ntawm qhov ntev;
Dimensional xyuas ntawm sab nraud txoj kab uas hla, phab ntsa thickness, ncaj, thiab qhov kawg npaj.
Kev tawg thaum lub sij hawm kuaj hydrostatic yuav luag ib txwm taug qab rau ib qho ntawm qhov tsis xws luag uas tau piav qhia saum toj no, uas yog vim li cas qhov kev soj ntsuam ib ntus tseem ceeb: lub pob zeb tsis zoo, lossis ib qho kev sib tw uas tau qhia txog lub ceg tawv, feem ntau yuav ntes tau los ntawm NDT lossis los ntawm kev sim nws tus kheej ua ntej cov yeeb nkab tawm hauv lub zeb.
Kev sib tw ntawm Deepwater HP / HT Riser Pipe
Dej tob tob -siab/siab-kub (HP/HT) risers thawb seamless yeeb nkab rau nws cov kev txwv. Vim tias cov risers yuav tsum nqa lub siab sab hauv thiab sab nraud hydrostatic siab, cov khoom siv dag zog ib txwm xav tau cov phab ntsa hnyav heev. Rau 8 mus rau 10 nti sab nraud txoj kab uas hla riser, phab ntsa thickness tuaj yeem ncav cuag li 50 hli. Cov phab ntsa hnyav li no cuam tshuam kev tsim cov kev txwv, ua rau vuam nyuaj, nce nkoj payload, thiab yuav tsum tau siab heev installation nro. Qhov no yog vim li cas HP/HT riser tej yaam num soj ntsuam siab dua - qib zog thiab ceev faj sizing thaum ntxov rau theem tsim.
FAQ
Dab tsi yog qhov txawv ntawm seamless thiab welded yeeb nkab?
Seamless yeeb nkab yog pierced thiab tsim los ntawm ib tug khoom billet uas tsis muaj longitudinal weld, thaum welded yeeb nkab yog tsim los ntawm sawb los yog phaj thiab koom nyob rau hauv lub seam. Seamless yeeb nkab yog qhov zoo dua rau siab -siab thiab siab- qhov kub thiab txias kev pabcuam vim tias tsis muaj qhov chaw vuam los tshuaj xyuas lossis tsis muaj zog.
Vim li cas cov pob zeb raug tshuaj xyuas ua ntej dov?
Billet defects xws li nto kab nrib pleb, slag, thiab segregation yuav ciaj sia dov thiab tshwm nyob rau hauv cov yeeb nkab tiav. Conditioning lub billet ua ntej piercing tshem tawm qhov tsis xws luag ntawm qhov chaw pheej yig tshaj plaws hauv cov txheej txheem thiab tiv thaiv kev poob qis.
Dab tsi ua rau phab ntsa thickness eccentricity hauv seamless yeeb nkab?
Eccentricity feem ntau yog tshwm sim los ntawm kev tho tsis ruaj khov lossis elongation tej yam kev mob, suav nrog yob hnav, hloov pauv kub, lossis tsis raug cov cuab yeej sib dhos. Lub thinnest taw tes ntawm phab ntsa teeb tsa lub siab ntsuas, yog li mills tswj eccentricity nrog nruj me ntsis sampling.
Yuav ua li cas seamless yeeb nkab hydrostatically kuaj?
Txhua qhov ntev yog ntim nrog dej, vented, thiab pressurized rau qhov ntsuas siab xam los ntawm cov yeeb nkab qhov ntev thiab qhov tshwj xeeb, feem ntau 60 mus rau 80 feem pua ntawm lub zog tawm los, thiab tuav rau lub sij hawm yuav tsum tau nyob thaum lub zeb saib kom to.
Vim li cas HP/HT riser yeeb nkab hnyav heev?
Kev sib xyaw ua ke ntawm kev siab sab hauv thiab dej tob sab nraud xav tau ib phab ntsa tuab. Rau cov qib ib txwm, 8-10 nti OD riser tuaj yeem xav tau cov phab ntsa ze li 50 hli, uas nce qhov hnyav, vuam nyuaj, thiab kev teeb tsa nruj.
Kev kho cua sov dab tsi yog qhov qub rau carbon seamless yeeb nkab?
Normalizing yog qhov kev kho cua sov tshaj plaws rau cov pa roj carbon steel seamless yeeb nkab, refining cov qauv nplej tom qab dov. Cov qib siab dua yuav raug quenched thiab tempered, thaum txias - cov yeeb nkab tiav feem ntau yog normalized los yog kev ntxhov siab tom qab kos duab.
