API 5L GRB steel kav yog feem ntau siv rau roj thiab roj tsheb thauj mus los nyob rau hauv nruab nrab siab thiab kub tej yam kev mob, muab zoo toughness thiab weldability. Qib GR.B feem ntau siv cov khoom siv hlau hauv steelmaking thiab alloying additives xws li tooj liab, chromium, npib tsib xee, thiab titanium los txhim kho corrosion kuj thiab thermal kev ua tau zoo, kom ntseeg tau ntev - ua haujlwm nyob rau hauv ib puag ncig hnyav.
Chemical Composition API 5L Pipes Qib B hauv PSL1 Kab Yeeb
Chemical Composition API 5L Pipes Qib B hauv PSL2 Kab Yeeb
API 5L Qib B Kab Pipe Lub cev muaj zog
API 5L GRB Seamless Pipe Manufacturing Txheej txheem
Kev npaj Billet
Khoom puag ncig steel billets (carbon steel / qis-alloy steel) tshuaj xyuas thiab txiav kom ntev.
Piercing & Kub Rolling
Billet rhuab mus rau 1200℃→ Pierced rau hauv hollow plhaub → Nruam dov rau shaping.
Sizing & Txias
Txoj kab uas hla calibrated los ntawm sizing zeb → Dej quenching los yog cua txias (khoom siv -dependent).
Ua tiav
Ncaj → Eddy tam sim no/ultrasonic kuaj → Xaus ntsej muag → Hydrostatic test → Anti- txheej txheej.
Core Feature: Weld-dawb qauv, superior kev ncaj ncees rau siab -siab / siab- kub daim ntawv thov (xws li, gas kis mains).
API 5L GRBWelded Pipe Manufacturing Txheej txheem
Coil Kev Npaj
Steel strips uncoiled, leveled, thiab ntug-trimmed.
Tsim & Vuam
ERW (Electric Resistance Vuam): Sawb tsim rau hauv raj ntawm yob → High- zaus tam sim no fuses seam → Sab hauv / sab nrauv tshem tawm.
SAW (Submerged Arc Welding): Pre-bent strip welded nrog dual-sided submerged arc (LSAW / kauv variants).
Ncej -Kev kho Weld
Kev ntxhov siab-relieving heat treatment → Sizing → Full-lub cev ultrasonic/radiographic tshuaj xyuas.
Kev Xeem Kawg
Hydrostatic test → End machining → Txheej (xws li FBE / 3PE).
Core Feature: Kev ua haujlwm siab, tus nqi qis, zoo tagnrho rau nruab nrab -cov tshuab tsis tshua muaj siab (piv txwv li, hauv nroog gas networks).
API 5L GRB Kab Yeeb Nkab Hoobkas
