Kev sib piv ntawm cov qauv kev sib txuas Seamless yeeb nkab
| Txuj | Thawj Scope | Qib System |
| ASTM A53 / A53M-24 (Hom S) | General -lub hom phiaj, qis- cov kua dej / cov qauv (dej, roj, qis-temp steam) | Qib A / B (S: seamless) |
| ASTM A106 / A106M-24 | High -temp service (boilers, refineries, fais fab nroj tsuag) | Qib A / B / C (seamless nkaus xwb, tua hlau) |
| API 5L (PSL1 / PSL2) | Roj/gas kis pipelines (onshore/offshore) | Gr.B, X42–X80 (seamless/welded) |
Kev sib piv ntawm lub cev muaj zog ntawm cov qib hlau zoo sib xws
| Min. Tensile zog | Min. Yield zog | Elongation (Min)% | Kev cuam tshuam (J) | ||||||
| ASTM A53 Gr.B | 415mpa ua | 240 Mpa ib | 30 WT Tsawg dua los yog sib npaug rau 19mm | - | |||||
| ASTM A106 Gr.B | 415-550 Mpa | 240 Mpa ib | 30 WT Tsawg dua lossis sib npaug li 50 hli | -29℃Ntau dua lossis sib npaug rau 27J | |||||
| API 5L Gr.B PSL2 | 415-760 Mpa | 245-450 Mpa | 23 | -20℃Ntau dua lossis sib npaug rau 41J Vertical |
Kev sib piv ntawm cov khoom siv tshuaj lom neeg ntawm cov qib hlau
| C | Mn | P | S | Si | Cu① | Ni① | Cr① | Mo① | V① | ||
| ASTM A53 Gr.B | 0.03 | 0.95-1.20 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 | |
| ASTM A106 Gr.B | 0.03 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 | |
| API 5L Gr.B PSL2 | 0.28 | 0.60-1.20 | 0.03 | 0.03 | 0.1-0.4 | 0.2 | 0.3 | 0.3 | 0.15 | 0.08 | |
Cov ntawv sib piv
- ASTM A53 vs. A106: A106 yog seamless -tsuas yog rau siab -temp kev pabcuam; A53 tso cai rau welded (ERW) rau kev txuag nqi hauv kev siv tsis yog - tseem ceeb.
- API 5L PSL1 vs. PSL2: PSL2 ntxiv cov kev sim cuam tshuam, nruj dua chemistry, thiab 100% NDT- siv rau sab ntug dej hiav txwv / siab- cov kav dej muaj kev pheej hmoo.
- Kev tswj tsis huv: API 5L PSL2 muaj qhov txwv nruj tshaj plaws ntawm P thiab S (tsawg dua lossis sib npaug rau 0.030%), ua raws li A106, thaum A53 kuj yog lenient.
- Impact toughness: Ob qho tib si A106 thiab API 5L PSL2 muaj qhov yuav tsum tau muaj kev cuam tshuam meej, thaum A53 tsis muaj qhov yuav tsum tau ua.
- Lub zog txwv: Tsuas yog API 5L PSL2 qhia txog qhov txwv siab tshaj plaws rau kev tawm los thiab lub zog tensile los tiv thaiv kev pheej hmoo ntawm brittleness tshwm sim los ntawm lub zog siab heev - rau - tawm los piv.
- High-kub kev ua haujlwm: Vim tias Si cov ntsiab lus hauv A106 yog ntau dua lossis sib npaug li 0.10%, nws qhov siab -kub oxidation kuj zoo dua li ntawm A53 thiab API 5L.
Thov Field
| Daim ntawv thov | Pom zoo Standard | Qhov Tseem Ceeb |
| Tsawg- cov kab dej / cov pa roj | ASTM A53 Gr.B | Nqi-zoo; seamless yeem; hydrotested |
| Siab -temp steam pipes (fais fab nroj tsuag) | ASTM A106 Gr.B | Tua hlau; kev ntxhov siab; siab -temp creep kuj |
| Roj/gas kis pipelines | API 5L Gr.B PSL2 | NDT nruj; cuam tshuam tsis kam; kev tswj corrosion |
01.
Dimensional Tolerances
ASTM A53: OD kam rau ua ± 0.75%; phab ntsa thickness ± 12.5%.
ASTM A106: Tighter OD ± 0.5%; phab ntsa thickness ± 10% rau qhov tseem ceeb haum.
API 5L: OD ± 0.5%; phab ntsa thickness ± 10% (PSL2); ovality Tsawg dua lossis sib npaug li 2% ntawm OD.
02.
Kev Ntsuas & Kev Tswj Xyuas Zoo
Kev ntsuam xyuas cuam tshuam: Yuav tsum tau ua rau ASTM A106 Gr.C, API 5L PSL2; Tsis tas yuav tsum tau ASTM A53
NDT: API 5L PSL2 xav tau 100% ultrasonic / radiographic kuaj; ASTM A53 tsuas yog rau kev txiav txim tshwj xeeb.
Hydrotest siab: ASTM A53 caps ntawm 2800 psi; API 5L ua raws li kev ntsuas siab tsim.
