API 5L X70 qib yog ib qho kev tsim tshwj xeeb hauv API 5L tus qauv uas qhia tau hais tias muaj zog siab, qis-alloy steel yeeb nkab nrog qhov tsawg kawg nkaus lub zog ntawm 70, 000 psi (483 MPa). Nws muaj cov ntsiab lus ntawm manganese ntau dua ntawm 1.65% piv rau cov kav dej qis xws li X52. Raws li qhov tshwm sim, nws muaj cov cuab yeej zoo tshaj plaws, tuaj yeem tiv taus kev ua haujlwm siab dua, cov nqi ntws ntau dua, thiab muaj peev xwm thauj cov kua dej mus ntev dua.
API 5L X70 Welded kauv yeeb nkab Chemical Composition
| X70 PSL1 | X70 PSL 2 | |||||||
| Qib | C (Max.) | Mn (Max.) | P (Max.) | S (Max.) | C (Max.) | Mn (Max.) | P (Max.) | S (Max.) |
| X70 | 0.26 | 1.65 | 0.03 | 0.03 | 0.22 | 1.85 | 0.025 | 0.015 |
API 5L X70 carbon steel kauv yeeb nkab Mechanical Properties
| Qib Qib | Tensile Properties - X70 Yeeb Nkab Lub Cev ntawm SMLS thiab Welded Pipes PSL 1 | X70 welded yeeb nkab | ||
| Yield zog a | Tensile zog a | Elongation | Tensile zog b | |
| Rt0,5 PSI Min | Rm PSI Min | (hauv 2 hauv Af% min) | Rm PSI Min | |
| X70 | 70,300 | 82,700 | c | 82,700 |
Kev tsim khoom
Tswj Rolling: Cov hlau yog dov mus rau qhov loj me kom ntseeg tau tias cov tuab tuab thiab cov khoom siv tshuab thoob plaws hauv cov yeeb nkab.
Kev kho cua sov: Cov yeeb nkab tau tswj xyuas cov cua sov thiab cua txias kom zoo dua cov microstructure thiab txhim kho cov khoom siv kho tshuab.
Nondestructive Testing: Ntau yam kev kuaj tsis zoo, xws li kev tshuaj xyuas ultrasonic thiab radiographic, yog siv los kuaj xyuas qhov tsis xws luag lossis qhov tsis zoo hauv cov yeeb nkab.
Daim ntawv thov
Cov kav xa mus ntev
Offshore thiab onshore pipelines
Roj thiab roj sib sau ua ke systems
Subsea pipelines
High-pressure thiab high-temperature ib puag ncig
Qhov zoo thiab kev txwv
Kev ua haujlwm siab dua thiab cov nqi ntws
Txo cov phab ntsa thickness, yog li txuag nqi
Ua kom muaj txiaj ntsig hauv kev thauj mus los ntev
Ua kom muaj zog rau sab nraud thiab sab hauv loads
Txawm li cas los xij, cov qib qis dua muaj cov khoom siv ntau dua thiab cov nqi tsim khoom piv rau API 5L X70 qib
