1. Dab tsi txhais tau tias ASTM A671 CG100 Class 12 kav?
Teb:
ASTM A671 CG100 Chav Kawm 12 qhia meejultra-siab-siab hluav taws xob-fusion-welded (EFW) kavrau kev pabcuam loj:
Khoom siv:Carbon steel nrogYam tsawg kawg nkaus lub zog ntawm 100 ksi (690 MPa)
Qib 12 Rating:Hydrostatic xeem siab ntawm12,000 psi (827 bar)
Qhov kub thiab txias:Certified rau-75℃F txog +450℃F (-59℃rau +232 degree)
Feature tseem ceeb:Yuav tsum tau100% automated ultrasonic kuaj (AUT)ntxiv rau radiography
Nco tseg:Sawv cev rau cov chav kawm siab tshaj plaws hauv ASTM A671, feem ntau yog siv rau qhov tseem ceeb hydrocarbon thiab kev siv hluav taws xob.
2. Chemical Composition & Metallurgical Control?
Teb:
Kev txwv nruj nruj (wt.% max):
| Element | Ntau yam | Lub hom phiaj |
|---|---|---|
| C | Tsawg dua lossis sib npaug li 0.18% | Maximizes weldability |
| Mn | 1.50-1.80% | Lub zog / toughness sib npaug |
| P | Tsawg dua lossis sib npaug li 0.015% | Ultra{0}}tsawg phosphorus |
| S | Tsawg dua lossis sib npaug li 0.005% | Ze ntawm - sulfur- dawb |
| Micro{0}} alloys | Nb + V + Ti Tsawg dua lossis sib npaug li 0.12% | grain refinement |
Metallurgy:
Quenched & Tempered (Q&T) mob
Bainitic-martensitic dual-phase microstructure
3. Mechanical Properties & Testing Protocol?
Teb:
Qhov yuav tsum tau muaj:
Tensile zog:120-140 ksi (830-965 MPa)
Yield zog: Ntau dua lossis sib npaug rau 100 ksi (690 MPa)
Elongation:Ntau dua lossis sib npaug li 14% (transverse)
Impact Toughness:
60 ft-lb (81J) avg ntawm -75℃F (-59 degree)
Shear Area Ntau dua lossis sib npaug li 85%hauv DWTT ntawm -30℃F (-34 degree)
Hydrostatic Test: 3.5x tsim siab
Kev Xeem Tshwj Xeeb:
Hardness daim ntawv qhia (tsawg dua los yog sib npaug rau 22 HRC)
Tag nrho -length residual stress ntsuas
4. Kev Siv Tseem Ceeb & Kev Ua Haujlwm Zoo?
Teb:
Kev xa tawm tseem ceeb:
Ultra- Roj & Roj Dej tob
20,000 psi Christmas ntoo
Subsea compression systems
Hydrogen Infrastructure
Ua kua hydrogen thauj ntawm -423℃F (-253 degree)
Nuclear Fusion
Cryogenic ntim rau tokamak reactors
Qhov zoo:
40% sib dua li cov pa roj carbon monoxide ntawm qhov sib npaug ntawm qhov ntsuas siab
Ua kom pom 100-xyoo lub neej qaug zog hauv kev pabcuam qaub (NACE MR0103 ua raws)
5. Sib piv nrog Cov Qauv Sib Tw?
Technical Benchmark Table:
| Parameter | Tom ntej: ASTM A671 CG100-12 | API 5L X120 | ISO 3183 L555MB |
|---|---|---|---|
| Txheej txheem | EFW + Q&T | SMLS + Q&T | HFW+Q&T |
| Tawm tswv yim (MPa) | 690 | 827 | 555 |
| CVN @-60 degree | 81J | 60J | 50J |
| NDE | RT+AUT+PAUT | AUT | UT + EMI |
| Nqi Factor | 2.0x | 1.8x | 1.3x |
Phau Ntawv Qhia Xaiv:
CG100-12 rausiab heev cryogenictshuab
API 5L X120 rauultra- cov kav dej tob
ISO 3183 Kev Tswj Xyuas Kev Tswj Xyuasthoob ntiaj teb pipeline tej yaam num
