1. ASTM A671 CB60 Class 23 steel yeeb nkab yog dab tsi?
A siab-lub zog carbon-manganese EFW (Electric-Fusion-Welded) yeeb nkabtsim rausiab-siab thiab qis-kev pabcuam kub, ua raws liASTM A671-25 Cov khoom siv raw khoom.
CB 60: Carbon -manganese steel qib (0.25% max C, 1.20% Mn) nrogCharpy cuam tshuam kuaj ntawm -20℃F / -29 degreerau qis-kub toughness.
Chav Kawm 23: Yam tsawg kawg nkaus yield zog ntawm23 ksi (159 MPa), positioned rau kev thov kev lag luam thiab kev siv hluav taws xob.
2. Cov ntawv thov tseem ceeb hauv Q4 2025?
Kev Siv Zog: Siab -cov kab hluav taws xob siab (txog1,000 psi), geothermal zog systems.
Roj & Roj: Tsis yog-cov kev pabcuam qaub ncaug thiab kev sib sau ua ke (ibNACE MR0175-2025).
Hydrogen Economy: Secondary piping rauxiav hydrogentej yaam num (blends<30% H₂).
3. Technical Advancements vs. Chav Kawm 22?
Lub zog: 4.5% yield zog dua Class 22 (23 vs . 22 ksi), ua kom3-5% poob phausrau qhov sib npaug siab ntsuas.
Fabrication: Yuav tsum tauPWHT (Post-Kev kho cua sov) for all thicknesses >0.375 nyob rau hauv (9.5 mm) kom txo tau weld cheeb tsam brittleness.
Nqi: 8–12% premium tshaj Class 22 (2025 avg:2,100–2,100–2,500/ton).
4. 2025 Kev Ntsuam Xyuas & Kev Hloov Kho Kev Ua Raws Cai
NDT: 100% radiography lossis phased -array UTrau tag nrho cov girth welds (perASME B31.3-2025).
Traceability: Blockchain{0}} txhawb nqa digital MTRsnrog cov cim cim microchip (ISO 10474: 2025 Qib 4).
Sustainability: Tsim nyog rauUS IRA se creditsyog siv nyob rau hauv renewable zog los yogCCS (Carbon Capture & Cia)tej yaam num.
5. Kev Muag Khoom & Cov Qauv Thoob Ntiaj Teb
Thawj Standard: ASTM A671-25 Cov khoom siv raw khoom(Nqe 12 rau Chav Kawm 23 tshwj xeeb).
Lwm txoj kev:
TS EN 10217-1 P355TR2(EU, nrog kev soj ntsuam nruj dua ntawm -30℃).
JIS G3454 STPG410(Tebchaws Asia, yuav tsum muaj kev lees paub ntxiv).
