1. ASTM A671 CF70 Class 13 Pipe yog dab tsi?
Teb:
ASTM A671 CF70 Chav Kawm 13 yog asiab-kev ua tau zoo EFW (Electric-Fusion-Welded) carbon steel yeeb nkabengineered rauultra- qis- kev pabcuam kub (-70℃F/-57℃) thiab kev siv nruab nrab-siab.
Txheem:ASTM A671 (2025 Tsab Ntawv, nrog rau kev hloov kho qhov kev ntsuam xyuas cov txheej txheem).
Qib:CF70 npecarbon steel optimized rau cryogenic toughness.
Chav Kawm 13:QhiaTsawg tshaj tawm lub zog ntawm 13 ksi (90 MPa)- zoo tagnrho rauhydrogen economic infrastructure.
2025 Innovation:Ib txhia manufacturers tam sim no muabcov kav dej ntsenrog embedded strain sensors rau tiag tiag - sijhawm saib xyuas.
2. Cov Khoom Siv Tseem Ceeb & Kev Ntsuas
Teb:
Tshuaj muaj pes tsawg leeg:
C Tsawg dua lossis sib npaug li 0.20%Yog ': 0.80-1.45%,S / P Tsawg dua lossis sib npaug li 0.015%(2025 txwv nruj dua rau hydrogen embrittlement tsis kam).
xaiv tauNb/Ti micro- alloyingrau weld cheeb tsam toughness.
Mechanical Properties:
Tensile zog:70-95 ksi (483-655 MPa).
Charpy V-ntsis:Ntau dua lossis sib npaug li 22 ft-lb (30 J) ntawm-70℃F(raws li ASTM A370 hloov kho tshiab).
Quality Assurance:
100% automated UT + phased -array RTrau weld seams (2025 kev lag luam tus qauv).
3. Sib piv nrog cov qib zoo sib xws
| Parameter | CF70 Chav Kawm 13 | CF70 Chav Kawm 12 | A350 LF3 (Forged) |
|---|---|---|---|
| Yield zog | 13 ksg | 12 ksg | 24 ksg |
| Temp Range | -70℃F rau +700℃F | -70℃F rau +650℃F | -150℃F txog +650℃F |
| Tus nqi (2025) | 2,000-2,000-2,500/ton | 1,800–1,800–2,200/ton | $3,000+/ton |
| Qhov zoo tshaj plaws siv Case | LH₂ hloov kav dej | Industrial cryogenics | High -siab haum haum |
4. Dimensions, Tolerances & Manufacturing
Teb:
Qhov Loj Loj: 12 "to 84" OD(Ntawm rau cov nroj tsuag modular hydrogen).
Phab ntsa Thickness: 0.4 "mus rau 2.25"(tshiab 2025 thickness xaiv rau LH₂ daim ntaub ntawv).
Kev kam rau ua (ASTM A671: 2025):
OD: ±0.6% (≤40") / ±0.8% (>40").
Phab ntsa:+12%/-7% (tighter dua Class 12).
Kev tsim tawm:
Laser - coj SAWnroghauv - txheej txheem thermal imaging(2025 tech upgrade).
5. 2025 Daim Ntawv Thov & Phau Ntawv Qhia Kev Muag Khoom
Teb:
Kev rhuav tshem - Ntug Siv:
Liquid Hydrogen (LH₂) fueling stations(-423℃F compatibility).
Offshore cua - mus rau - hydrogen platforms(Integrated cryogenic kav).
Tom ntej no -gen space launch cryo-systems(NASA Artemis kev sib koom tes).
Ua raws li:
ASME B31.12-2025(Hydrogen Piping Code).
ISO 21009-2: 2025(Cryogenic hlab ntsha hloov tshiab).
Cov lus qhia txog kev yuav khoom:
Cov Khoom Siv Digital Passporttam sim no yuav tsum tau nyob rau hauv EU rau carbon nrhiav.
Sustainability Note:
"Net{0}}Zero Steel" variantsmuaj nrog60% qis dua CO₂ntawm hydrogen{0}}raws li DRI ntau lawm.
