1. ASTM A671/CG100 Class 41 Steel Pipe yog dab tsi?
Teb:
ASTM A671 / CG100 Chav Kawm 41 yog apremium-qib hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra- cov kev pabcuam hnyav, combining siab siab thiab cryogenic kev ua tau zoo.
"CG100": Carbon steel nrog nruj qis -kub toughness yuav tsum tau.
"Klass 41": Cim rau ASTM A671, qhiaKev ntsuas hydrostatic ntawm 175% ntawm qhov tsawg kawg nkaus yield zog, qib siab tshaj plaws rau EFW kav dej.
Cov ntawv thov tseem ceeb:
Subsea roj / roj pipelines.
High -siab hydrogen thauj.
Nuclear tswj systems.
2. Chav Kawm 41 txawv li cas ntawm Chav Kawm 40 lossis Chav Kawm 52?
Teb:
| Chav kawm | Kuaj Siab | Qhov Tseem Ceeb |
|---|---|---|
| Chav Kawm 40 | 150% yield | Ultra{0}}siab siab |
| Chav Kawm 41 | 175% yield | Heev overpressure kev ruaj ntseg margins |
| Chav Kawm 52 | 100% tawm los + kev ntxhov siab | Corrosive/cyclic loading |
| Lus Cim: Chav Kawm 41 tau teev tseg rauphem tshaj - xwm txheej scenarios(piv txwv li, cov tshuaj tiv thaiv dej tob tob). |
3. Dab tsi yog qhov kev txwv kev ua haujlwm?
Teb:
Kub: Certified rau-100 ° F txog 750 ° F (-73 ° txog 399 ° F)nrog ntxiv Charpy xeem ntawm-150 ° F (-101 ° F)rau cov ntawv thov Arctic.
Siab: Rated rauNtau dua lossis sib npaug li 5,000 psi(tsim txawv ntawm ASME B31.3 Tshooj KD-10 rau cov kav dej siab).
Material Science: Yuav tsum tauzoo -kev xyaum ua qoob looASTM A941 (ASTM A941) kom ntseeg tau tias kev puas tsuaj puas.
4. Cov qauv twg tswj hwm chav kawm 41 Cov kav dej?
Teb:
Thawj StandardQauv: ASTM A671 (nrogAppendix X5rau hoob 41-cov cai tshwj xeeb).
Yuav tsum xeem:
100% automated ultrasonic kuaj (AUT) + radiography.
Hardness testing rau ASTM E18 (max 22 HRC).
Cov ntawv pov thawj:
Thib peb-kev lees paub ntawm tog neeg (piv txwv li, DNV/ABS rau offshore).
Cov ntaub ntawv qhia txog hydrogen compatibility (yog tias tsim nyog).
5. Cov Kev Cai Fabrication Tseem Ceeb yog dab tsi?
Teb:
Vuam:
Electron{0}}beam vuam (EBW)nyiam rau seam kev ncaj ncees.
PWHT at1,100℃F (593 degree)rau kev ntxhov siab.
NDT: Phased-array UT + digital radiography (DR).
Kev teeb tsa:
Zero txias dabtsi yog khoov; tsuas yog kub induction khoov tso cai.
Bolt torque specs rau ASME PCC-1 rau flange kev sib txuas.
Tswv yim Pro: Rau kev pabcuam hydrogen, qhia meejAPI 5L-ua raws li kev huvtiv thaiv embrittlement.
