Ob Ncaj -Seam Welded Pipes
ERW thiab LSAW yeeb nkab sib koom ua ke hauv cov duab geometry: lub seam khiav raws qhov ntev ntawm cov yeeb nkab, sib npaug mus rau lub axis, tsis yog helically li hauv kauv welded yeeb nkab. Dab tsi cais lawv yog txoj kev seam yog tsim thiab txoj kev ntawm cov yeeb nkab lub cev yog tsim, thiab qhov sib txawv ntawd kho qhov kev ua tau zoo, qib nqi thiab daim ntawv thov ntawm txhua yam khoom. Ib tus neeg yuav khoom uas nkag siab txog ob txoj kev tuaj yeem sib phim cov yeeb nkab rau lub luag haujlwm es tsis txhob them nyiaj rau lub peev xwm uas yuav tsis siv.
ERW Yeeb Nkab: Siab -Frequency Resistance Vuam
ERW stands rau hluav taws xob kuj welded. Kub dov kauj yog uncoiled, levelled, trimmed thiab ntug- npaj, ces nce mus rau hauv ib ncig los ntawm ib tug series ntawm yob. Raws li ob lub npoo ze rau ib leeg, siab - zaus hloov tam sim no raug siv rau lawv. Cov nyhuv ntawm daim tawv nqaij thiab cov nyhuv sib thooj mloog zoo li tam sim no nyob rau hauv ib lub nqaim band ntawm cov npoo npoo, yog li cov npoo yog rhuab sai heev rau vuam kub thaum seem ntawm seem nyob qis qis. Squeeze rolls ces yuam cov npoo ua ke thiab kev sib koom ua ke yog tsim los ntawm kev siab ib leeg, tsis muaj cov hlau muab tub lim.
Sab hauv thiab sab nraud flash raug tshem tawm los ntawm cov cuab yeej scarfing tam sim ntawd tom qab vuam. Lub seam ces dhau los ntawm qhov chaw nres tsheb annealing uas normalizes thaj tsam weld thiab tshem tawm cov hardening tsim los ntawm cov cua kub ceev thiab cua txias, tom qab ntawd cov yeeb nkab nkag mus rau hauv lub tshuab sizing thiab straightening uas coj nws mus rau qhov kawg txoj kab uas hla, roundness thiab straightness ua ntej txiav mus rau ntev.
ERW Pipe Cov yam ntxwv thiab cov kev txwv
Lub vuam yog tsim los ntawm cov hlau tsis muaj hlau thiab cov seem yog rhuab hauv zos xwb, yog li ERW yeeb nkab yog pheej yig los tsim cov kab nrawm.
Cov txheej txheem haum rau cov phab ntsa nyias nyias thiab cov kab me me, qhov twg cov coil ua kom raug thiab cov npoo sib ntsib tsis tu ncua.
Weld zoo nyob ntawm qhov xwm txheej ntawm ntug, strip dav kam rau ua thiab nyem siab; kev tswj tsis zoo ua rau cov welds txias thiab penetrators.
Weld-kab hardness yog tswj los ntawm ncej-weld annealing, yam tsis muaj qhov seam coj txawv ntawm lub cev yeeb nkab.
Vim tias qhov txias txias tsis yog ib feem ntawm txoj hauv kev, qhov seem ntawm kev ntxhov siab yog tswj hwm los ntawm qhov loj me thiab annealing.
Kev lag luam ntau lawm npog sab nraud diameters txog li 600 hli hauv cov phab ntsa nyias nyias, thiab cov txheej txheem yog qhov pheej yig tshaj plaws thaum ua cov yeeb nkab me me, sib zog ua haujlwm ntev.
LSAW Yeeb Nkab: Tsim thiab Submerged Arc Vuam
LSAW stands rau longitudinal submerged arc welded. Cov khoom pib yog steel phaj es tsis yog coil. Lub phaj yog ntug-milled, crimped ntawm qhov kawg thiab tsim rau hauv ib qho qhib cylindrical zoo li, thiab longitudinal seam ces kaw los ntawm submerged arc vuam rau sab hauv thiab sab nraud, feem ntau nyob rau hauv ob peb hla. Nyob rau hauv submerged arc vuam lub arc yog faus rau hauv qab ib txheej ntawm granular flux, uas tiv thaiv lub molten pas dej ua ke, stabilizes lub arc thiab ua ib tug ntom, huv si hlaws nrog zoo heev toughness.
Cov txheej txheem tsim nyob rau hauv kev siv ntau yog UOE, nyob rau hauv uas lub phaj yog nias rau hauv ib tug U ces ib tug O profile ua ntej vuam thiab zaum kawg expansion; JCO, nyob rau hauv uas lub phaj yog crimped kauj ruam yog kauj ruam mus rau ib tug J profile thiab ces kaw; thiab yob dabtsi yog khoov, nyob rau hauv uas lub plhaub yog tsim los ntawm successive passes ntawm yob. Tom qab vuam, cov yeeb nkab feem ntau yog kho kom zoo dua qub, txo qis kev ntxhov siab thiab ncav cuag nws qhov ntev kawg.
Kev sib piv ntawm ERW thiab LSAW Yeeb Nkab
| Yam ntxwv | ERW cev | LSAW tub |
|---|---|---|
| Cov khoom pib | Kub dov kauj | Hlau phaj |
| Seam hom | Siab weld yam tsis muaj cov khoom siv hlau | Multi-pass submerged arc vuam nrog muab tub lim |
| Hom sab nraud txoj kab uas hla | Me me mus rau nruab nrab | Nruab nrab mus rau loj heev |
| Phab ntsa thickness | Nyias mus rau nruab nrab | Nruab nrab mus rau hnyav |
| Weld toughness | Zoo tom qab seam annealing | Zoo heev, los ntawm flux thiab dhau kev tswj |
| Tus nqi txheeb ze | qis | Siab dua |
| Tej hauj lwm | Dej, tsawg-cov pa roj, cov qauv thiab kev pabcuam dav dav | Roj thiab roj kis tau tus mob, siab - kab siab, txoj kab uas hla loj |
Cov Qauv Khoom thiab Kev Xeem
Kab yeeb nkab feem ntau raug txiav txim rau API 5L lossis mus rau GB / T 9711, uas yog cov txheej txheem kev sib raug zoo thiab uas txhais tau hais tias cov khoom lag luam tshwj xeeb ua raws li cov kev xav tau nruj dua ntawm chemistry, toughness, weld zoo thiab tshuaj xyuas. Kev pabcuam dav dav thiab cov yeeb nkab qauv yuav raug txiav txim rau ASTM A53 lossis ASTM A106 rau cov pa roj carbon steel, lossis rau GB / T 3091 rau welded steel yeeb nkab rau qis - kev pabcuam siab.
Cov kev xeem uas yuav tsum tau muaj xws li kev sim tensile ntawm cov yeeb nkab lub cev thiab hla cov vuam, kev sib tw thiab khoov, kev ntsuam xyuas qhov cuam tshuam ntawm vuam thiab cua sov- thaj chaw muaj kev cuam tshuam qhov hnyav tau teev tseg, kev ntsuas hydrostatic lossis nruj, thiab tsis yog- kev kuaj xyuas ntawm cov seam los ntawm ultrasonic lossis radiographic txoj kev. Dimensional pov thawj ntawm sab nraud txoj kab uas hla, ovality, phab ntsa thickness, ncaj thiab ntev yog ua nyob rau hauv ib tug ntau tshuaj ntsuam xyuas, thiab cov txiaj ntsig tau tshaj tawm ntawm daim ntawv pov thawj zeb xeem.
Yuav ua li cas xaiv ntawm lawv
Xaiv ERW thaum lub luag haujlwm yog nruab nrab, thaum txoj kab uas hla thiab phab ntsa thickness zaum hauv qhov kev lag luam ntawm cov txheej txheem, thiab thaum tus nqi thiab kev xa khoom ceev tswj hwm qhov kev txiav txim siab yuav khoom. Cov kab dej, qis - cov pa xa hluav taws xob, cov kab ke thiab cov kav dej dav dav yog cov haujlwm ERW.
Xaiv LSAW thaum cov yeeb nkab yuav tsum nqa roj lossis roj ntawm qhov siab, thaum txoj kab uas hla loj, thaum lub phab ntsa tuab, lossis thaum qis - qhov kub thiab txias thiab qhov kev ntseeg siab yog qhov tseem ceeb. Transmission mains thiab loj - txoj kab uas hla txoj kab uas hla yog nyob rau hauv pawg no. Qhov twg qhov kev qhia tshwj xeeb xav tau qhov cuam tshuam- kuaj cov vuam ntawm qhov ntsuas kub qis, LSAW nrog cov txheej txheem vuam tsim nyog feem ntau yog txoj hauv kev nyab xeeb dua.
Paub meej tias qhov kev txiav txim loj thiab phab ntsa thickness yog nyob rau hauv lub pov thawj muaj peev xwm ntawm cov txheej txheem xaiv.
Sib piv cov khoom specification qib rau lub luag hauj lwm es tsis yog tus cwj pwm; qib siab dua ntxiv cov nqi kuaj.
Txheeb xyuas tias cov txheej txheem vuam thiab tsis yog - txoj kev kuaj xyuas puas tau teev nyob rau hauv daim ntawv xaj.
Pom zoo qhov kawg tiav, bevelling, txheej thiab kos npe ua ntej ntau lawm, tsis yog tom qab.
FAQ
Q: Puas yog ERW thiab LSAW kav ob qho tib si ncaj-seam welded kav?
Yog lawm. Nyob rau hauv ob qho tib si cov khoom, weld khiav longitudinally raws cov yeeb nkab, parallel mus rau axis. Qhov txawv yog tias ERW siv siab - zaus ua cua sov thiab siab yam tsis muaj cov hlau muab tub lim, thaum LSAW siv submerged arc vuam nrog cov hlau muab tub lim rau sab hauv thiab sab nraud ntawm cov seam.
Q: Cov txheej txheem twg muab qhov muaj zog weld?
LSAW feem ntau xa cov weld toughness zoo dua, vim hais tias cov txheej txheem submerged arc yog kev tswj fusion weld ua nrog flux thiab muab tub lim hlau thiab cov seam tuaj yeem tso rau hauv ntau qhov kev hla. Ib qho ERW seam yog suab thiab txaus rau nws lub luag haujlwm uas tau npaj tseg thaum nws tau ua kom zoo, tab sis nws cov khoom nyob ntawm qhov kev npaj ntawm ntug thiab nyem.
Q: Qhov txawv ntawm UOE, JCO thiab yob dabtsi yog khoov?
Lawv yog peb txoj hauv kev tsim cov phaj rau hauv lub plhaub cylindrical ua ntej vuam. UOE nias lub phaj rau hauv U thiab tom qab ntawd tus qauv O, JCO crimps lub phaj kauj ruam ntawm kauj ruam mus rau hauv J profile ua ntej kaw, thiab yob dabtsi yog khoov daim ntawv lub plhaub los ntawm kev hla dhau ntawm cov yob. Tag nrho peb yog ua raws li kev vuam thiab feem ntau yog los ntawm kev siv tshuab nthuav dav.
Q: Vim li cas ERW yeeb nkab annealed tom qab vuam?
Lub siab - zaus vuam voj voog ua kom sov thiab txias cov seam ntug sai heev, uas tawm hauv ib qho nyuaj, brittle cheeb tsam raws kab weld. Annealing normalizes thaj tsam ntawd, rov ua kom cov ductility thiab ua rau cov seam coj tus cwj pwm tsis tu ncua nrog rau qhov seem ntawm cov yeeb nkab thaum khoov, flattening thiab kev pabcuam.
Q: Yam khoom twg yuav tsum tau teev tseg rau lub ntsiab dej faus?
Rau nruab nrab siab thiab txoj kab uas hla, ERW yeeb nkab feem ntau yog qhov kev xaiv kev lag luam, muab cov txheej txheem tsim nyog thiab kev ntsuas nruj. Qhov twg txoj kab uas hla, siab lossis hauv av hu rau phab ntsa tuab dua thiab muaj zog dua, LSAW yeeb nkab tau teev tseg.
Q: Cov kev ntsuam xyuas dab tsi feem ntau ua rau ntawm cov yeeb nkab welded?
Kev ntsuam xyuas tensile ntawm lub cev thiab thoob plaws qhov vuam, flattening los yog khoov kev ntsuam xyuas, qhov kev ntsuam xyuas qhov hnyav yog teev, ib qho kev ntsuas hydrostatic los yog nruj, kev ntsuam xyuas qhov ntev, thiab tsis yog - kev ntsuam xyuas kev puas tsuaj ntawm qhov vuam los ntawm ultrasonic lossis radiographic txoj kev, tag nrho cov tshaj tawm ntawm daim ntawv pov thawj zeb xeem.
