1. ASTM A671 CB60 Class 22 steel yeeb nkab yog dab tsi?
A siab -kev ua tau zoo carbon-manganese EFW yeeb nkabtsim rausiab-siab thiab qis- qhov kev pabcuam kub, ua raws liASTM A671-25 Cov khoom siv raw khoom.
CB 60: Carbon -manganese steel (0.25% max C, 1.20% Mn) nrogCharpy cuam tshuam kuaj ntawm -20℃F / -29 degree.
Chav Kawm 22: Yam tsawg kawg nkaus yield zog ntawm22 ksi (152 MPa), zoo tagnrho rau kev thov kev lag luam thiab kev siv hluav taws xob.
2. Cov ntawv thov tseem ceeb hauv xyoo 2025?
Kev Siv Zog: Siab -cov kab hluav taws xob siab (txog 800 psi), lub zog hluav taws xob hauv av.
Roj & Roj: Flowlines thiab cov kab sib sau ua ke hauv tsis yog- ib puag ncig qaub (ibNACE MR0175-2025).
Hydrogen Infrastructure: Piping rauxiav hydrogenkev thauj mus los (blends<25% H₂).
3. Kev sib piv rau Chav Kawm 21 lossis Lwm Qib?
Lub zog: 4.8% yield zog dua Class 21 (22 vs . 21 ksi), tso caithinner phab ntsa rau qhov sib npaug ntawm qhov ntsuas siab.
Fabrication: Yuav tsum tauPWHT (Post-Kev kho cua sov) for all thicknesses >0.375 nyob rau hauv (9.5 mm) los xyuas kom meej weld kev ncaj ncees.
Nqi: 7–10% premium tshaj Class 21 (2025 Q4 avg:2,000-2,000-2,400/ton).
4. 2025 Kev Ntsuam Xyuas & Ua Raws Li Kev Hloov Kho Tshiab
NDT: 100% radiography lossis phased -array UTrau tag nrho cov welds (ASME B31.3-2025).
Traceability: Digital MTRs nrog blockchain{0}} cov ntaub ntawv ruaj ntseg(ISO 10474: 2025 Qib 4).
Sustainability: Tsim nyog rauUS IRA se creditsyog siv nyob rau hauv renewable zog los yog CCS tej yaam num.
5. Kev Muag Khoom & Cov Qauv Thoob Ntiaj Teb
Thawj Standard: ASTM A671-25 Cov khoom siv raw khoom(Nqe 11 rau Chav Kawm 22 tshwj xeeb).
Lwm txoj kev:
TS EN 10217-1 P355TR2(EU, nrog kev soj ntsuam nruj dua).
GB/T 5310-2025 20MnG(Tuam Tshoj, xav tau kev lees paub ntxiv).
