Loj npaum li cas -Diameter Welded Pipes raug tsim
Loj - txoj kab uas hla welded kav yog lub caj qaum ntawm lub ntiaj teb no lub zog thiab kev xa dej. Kev tsim cov ntu loj no - mus txog 100 ntiv tes thiab siab dua - yuav tsum muaj cov txheej txheem tsim tshwj xeeb thiab siab - vuam vuam, feem ntauLSAW(longitudinal submerged arc vuam) thiabSSAW(kauv submerged arc vuam).
JCOE Kev Tsim Qauv rau LSAW
LSAW kav feem ntau yog tsim los ntawm siab - zoo steel phaj siv lubJCOEtxoj kev:
J-forming:
lub phaj yog khoov mus rau hauv "J" zoo li.
C-forming:
txuas ntxiv khoov rau hauv "C" duab.
O-forming:
Qhov kawg xovxwm tsim lub phaj rau hauv lub tog raj kheej "O" nrog rau qhov sib txawv seam npaj.
Vuam (DSAW):
lub seam yog welded los ntawm sab hauv thiab sab nraud nyob rau hauv granular flux.
Kev nthuav dav (E):
welded yeeb nkab yog mechanically nthuav mus rau qhov kawg txoj kab uas hla, xyuas kom meej ncig thiab relieving residual kev nyuaj siab.
Qhov cuam tshuamUAE
txheej txheem (U-forming, O-forming, Expansion) yog siv rau qhov loj tshaj plaws, thickest qib.
Ob -Sided Submerged Arc Vuam
Kev ncaj ncees yog guaranteed los ntawm welding seam ob zaug: ibsab hauv passua raws li ibsab nraud pass, txhua nyob rau hauv granular flux uas tiv thaiv atmospheric paug thiab guarantees tag nrho nkag. Rau API 5L PSL2 daim ntawv thov, tag nrho cov seam ntev yog kuaj los ntawm automated ultrasonic kuaj (UT) kom paub tsis muaj - ntawm - fusion lossis slag inclusions.
LSAW vs SSAW Capability
| Parameter | LSAW (JCOE/UOE) | SSAW (kauv) |
|---|---|---|
| Txoj kab uas hla | 16-60 hli | 8-120 hli |
| Max phab ntsa thickness | 60 hli + | ~ 25.4 hli |
| Cov qauv rigidity | Siab tshaj (ncaj seam) | Siab (helical bandage effect) |
| Tej daim ntawv thov | Offshore, siab -pressure mains | Dej, qis- mus rau- nruab nrab siab roj |
Quality Assurance
Tsis siv neeg ultrasonic kuaj (UT) ntawm tag nrho weld seam; radiography rau cov kab tseem ceeb
Kev ntsuam xyuas hydrostatic ntawm txhua cov yeeb nkab ntawm lub siab uas ua rau cov phab ntsa mus rau qhov tawm los
Charpy impact testing for PSL2 low-kev pab kub
Dimensional pov thawj ntawm OD, phab ntsa, ncaj thiab kawg squareness
Mechanical expansion kom meej OD thiab kev ntxhov siab nyem ua ntej kev soj ntsuam zaum kawg
Rau kev pabcuam qaub, daim hlau yuav tsum ua tau raws li NACE MR0175 / ISO 15156 cov cai rau HIC thiab SSC tsis kam, txheeb xyuas los ntawm kev sim.
Cov lus nug nquag nug (FAQ)
Puas yog LSAW zoo dua SSAW?
Rau hnyav-phab ntsa thiab ultra- siab- lub zog siab, LSAW yog qhov nyiam rau nws qhov yooj yim weld geometry thiab siab dua thickness txwv; SSAW ua tau zoo ntawm txoj kab uas hla loj heev hauv kev lag luam.
Mechanical expansion yog dab tsi?
Ib txheej txheem uas cov welded yeeb nkab yog ncab los ntawm sab hauv mus rau nws txoj kab uas hla kawg, kom paub meej OD, ncig thiab kev ntxhov siab.
Puas yog vuam cuam tshuam rau cov khoom siv zog?
Yog - nws tsim kom sov- thaj tsam cuam tshuam; online seam annealing lossis tag nrho normalizing rov qab puag-cov khoom hlau.
Qhov ntev tshaj plaws ntawm ib ntu yog dab tsi?
Standard yog 12 m; rau cov txheej txheem piling, LSAW tuaj yeem ncav cuag 18 m yam tsis muaj girth welds.
LSAW puas tuaj yeem ua haujlwm qaub?
Yog lawm, yog tias daim hlau ua tau raws li NACE MR0175 / ISO 15156 cov kev cai rau HIC thiab SSC tsis kam.
Qhov loj tshaj txoj kab uas hla yog dab tsi?
SSAW kauv yeeb nkab ncav cuag 120 ntiv tes thiab tshaj rau cov dej thiab cov qauv siv.
