API 5L PSL2 Qib B Ob chav -Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
Lub ntsiab lus tseem ceeb
API 5L PSL2 Qib B DSAW steel yeeb nkabyog cov pa roj carbon steel kab yeeb nkab tsim los ntawm American Petroleum Institute specification. Qhov kev xaiv "Qib B" qhia txog qhov tsawg kawg nkaus yield zog ntawm35,000 psi (241 MPa). PSL2 yog qib kev ua tau zoo nrog cov kev xav tau nruj dua li PSL1, suav nrog kev ntsuas qhov yuav tsum tau ua, kev tswj cov tshuaj lom neeg nruj dua, thiab kev txwv lub zog siab tshaj plaws.
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | API 5L (46th Edition, ua raws li ISO 3183) |
| PSL Qib | PSL2 - ua kom zoo dua qub |
| Qib | B (L245) |
| Min Yield zog | 241-245 MPa (35,000 psi) |
| Max Yield zog | 448-450 MPa (65,000 psi) |
| Min Tensile zog | 414-415 MPa (60,000 psi) |
| Max Tensile zog | 758-760 MPa (110,000 psi) |
| Yield-rau-Tensile Ratio | Tsawg dua lossis sib npaug li 0.93 |
| Qhov Loj (DSAW) | 16 "mus rau 72" OD (406mm txog 1829mm) |
| Phab ntsa Thickness | 6.0mm txog 50mm |
| Ntev | 6m mus rau 12m standard |
Tshuaj muaj pes tsawg leeg
| Element | Max % | PSL1 Sib piv |
|---|---|---|
| Cov pa roj carbon (C) | 0.24% | PSL1: 0.26% |
| Manganese (Mn) | 1.20% | Zoo sib xws |
| Phosphorus (P) | 0.025% | PSL1: 0.030% |
| Sulfur (S) | 0.015% | PSL1: 0.030% (txo 50%) |
| Carbon Equivalent (CEV) | 0.43% max | Tsis tau teev rau PSL1 |
Qhov chaw:
PSL1 vs PSL2 sib piv
| Feature | PSL1 | PSL2 |
|---|---|---|
| Cov pa roj carbon max | 0.26-0.28% | 0.24% |
| Sulfur max | 0.030% | 0.015% |
| Yield zog | Tsawg kawg nkaus (241 MPa) | Min & Max (241-450 MPa) |
| Tensile zog | Tsawg kawg nkaus (414 MPa) | Min & Max (414-758 MPa) |
| Yield-rau-Tensile Ratio | Tsis tau teev tseg | Tsawg dua lossis sib npaug li 0.93 |
| Kev ntsuam xyuas cuam tshuam | Tsis xav tau | Yuav tsum tau(27J ntawm 0 degree) |
| NDT Requirements | Txuj | 100% UT yuav tsum tau |
| Traceability | Batch qib | Pipe -los ntawm -pipe |
| Hom kev siv | Kev pabcuam dav dav | Kev pabcuam tseem ceeb, kev pabcuam qaub, qis temp |
Qhov chaw:
Delivery Conditions (Suffixes)
PSL2 Qib B DSAW cov kav dej tau muab nrog cov lus kawg qhia txog kev kho cua sov:
| Lub ntsiab lus | Qhov xwm txheej |
|---|---|
| BN | Li qub |
| BQ | Quenched thiab tempered |
| BR | Raws li - dov |
DSAW Manufacturing
Ob -sab vuam(sab hauv + sab nraud) tsim ib qho siab - zoo weld nugget
Siv raucov kab loj loj(16 "mus rau 72" +)
Txoj kev: JCOE lossis UOE tsim
100% ultrasonic soj ntsuam (UT) ntawm weld seam yog yuav tsum tau rau PSL2
Cov ntawv thov siv
Roj thiab roj xa mus kav
Kev pabcuam qaub (H₂S ib puag ncig)
Tsawg-kev pabcuam kub
Offshore pipelines
Kev xa dej mains
Cov ntsiab lus
API 5L PSL2 Qib B DSAW steel yeeb nkabyog qhov nkag -level PSL2 kab yeeb nkab qib. Cov txiaj ntsig tseem ceeb tshaj PSL1 suav nrog:
Yuav tsum tau kuaj Charpy cuam tshuam (27J ntawm 0 degree)
50% qis sulfur cov ntsiab lus (0.015% vs 0.030%)
Lub zog siab tshaj plaws (241-450 MPa)
Yield-rau-tensile ratio Tsawg dua lossis sib npaug rau 0.93
100% ultrasonic soj ntsuam ntawm weld seam
Tag nrho cov yeeb nkab-los ntawm- yeeb nkab traceability
Muaj nyob rau hauv loj diameters los ntawm 16 "mus rau 72" + rau DSAW manufacturing.
Thaum ordering, qhia:API 5L PSL2 Qib B, DSAW, Qhov Loj (OD x WT), Ntev, Kev Xa Khoom (BN / BQ / BR), Qhov ntsuas kub cuam tshuam.
