1. ASTM A671 CC65 Class13 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CC65 Class13 yog apremium fais-fusion-welded (EFW) carbon steel yeeb nkabtsim rausiab heev thiab hnyav ib puag ncig.
Qib:CC65 (yield zog tsawg kawg nkaus65 ksi / 448 MPa)
Chav Kawm 13: 13,000 psi (896 bar)Kev ntsuas siab, siab tshaj hauv ASTM A671 tus qauv
Kev Siv Tseem Ceeb:Offshore drilling risers, cov kav dej qaub (H₂S kev pabcuam), thiab cov txheej txheem ultra-siab-siab (UHP)).
2025 Trend:Nce kev saws me nyuam hauvcarbon capture thiab storage (CCS)tej yaam num vim nws robustness.
2. Dab tsi yog Qhov Kev Tsim Khoom & Kev Ua Haujlwm Zoo?
Teb:
Vuam:Submerged arc vuam (SAW) nrog100% automated UT / RT + phased array kuaj.
Kev kho cua sov: Normalizing + temperingyuav tsum tau ua kom paub meej:
Weld cheeb tsam toughness (Charpy V-notch kuaj ntawm-60 ° F / -51 ° C)
Ua haujlwm rau hydrogen-induced cracking (HIC)
Qhov Loj: 20" mus rau 120" OD, phab ntsa thickness mus txog60 hli(ASME B36.10M).
Lus Cim:Class13 cov kav dej nkag musstricter defect rejection yam (e.g., no linear indications >3 hli).
3. Chav Kawm 13 piv rau lwm chav kawm li cas?
Teb:
| Chav kawm | Kev ntsuas siab | Qhov Tseem Ceeb |
|---|---|---|
| Chav Kawm 10 | 10,000 psi | Txheem siab -siab |
| Chav Kawm 12 | 12,000 psi | UHP onshore / offshore |
| Chav Kawm 13 | 13,000 psi | Kev pabcuam qaub + huab cua txias |
Kev pauv - tawm:Class13 xav tauphab ntsa tuabthiabcov nqi khoom kim duatab sis ua tau zoo hauv H₂S ib puag ncig.
4. Qhov Kev Xeem & Ntawv Pov Thawj Yuav Tsum Tau Li Cas?
Teb:
NDT:
Tag nrho -kev kuaj lub cev ultrasonic (UT)
Hydrostatic Test ntawm19,500 psi (1.5x tsim siab)
Cov ntaub ntawv pov thawj:EN 10204 3.2 MTRs suav nrog:
HIC/SSC xeem tau los ntawm NACE TM0284
Hardness maps (max 250 HV10)
Marking:Laser -etched nrogASTM A671, CC65, Class13, cua sov tsis muaj., thiab NACE ua raws.
Regulatory Note:Ua raws liAPI 5L SR38rau kev pabcuam qaub thiabDNV-OS-F101rau subsea siv.
5. Cov Ntsiab Lus 2025 Kev Txiav Txim Siab yog dab tsi?
Teb:
Corrosion Mitigation:CRA (clad/lined) versions for acidic or CO₂-nplua nuj ib puag ncig.
Logistics:Class13 kav feem ntau xav tautshwj xeeb hnyav- nqa nkojvim luj.
Emerging Standards:Saib xyuasISO 15156-3: 2025 hloov tshiabrau cov khoom siv qaub ncaug.
Tswv yim Pro:Rau hydrogen pipelines, qhiaISO 11114-4 kev sib raug zoohauv kev yuav khoom.
