API 5L Gr.B PSL2 seamless yeeb nkab, nruj me ntsis raws li American Petroleum Institute (API) cov qauv, yog engineered rau xav tau kev pab cuam xws li hydrocarbon kis tau tus mob thiab refinery installations. Cov khoom no yogtsim los ntawm premium carbon-manganese steeldhaukub dov lossis txias txheej txheem, ua raws linormalizing + tempering kev kho mob. Cov no ua kom cov yeeb nkab ua tiavsiab zog nrog superior toughness, khoom xa tuaj:
Tensile zog: 415-565 MPa
Yield zog: Ntau dua los yog sib npaug rau 245 MPa
API 5L Qib B PSL2 tshuaj lom neeg muaj pes tsawg leeg
| Qib | C | Si | Mn | S | S | V |
| Gr. BR | 0.24 | 0.4 | 1.2 | 0.025 | 0.015 | c |
| Gr. BN | 0.24 | 0.4 | 1.2 | 0.025 | 0.015 | c |
| Gr.BQ | 0.18 | 0.45 | 1.4 | 0.025 | 0.015 | 0.05 |
API 5L Gr. B PSL1/PSL2 Mechanical Property
| Qib | Yield zog, psi | Tensile zog, psi | Elongation, hauv 2 hauv |
| Gr.B PSL2 (BR, BN, BQ, BM) | 35,500-65,300 | 60,200-95,000 | f |
API 5L GRB PSL2 Kab Pipes kam rau ua
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Tolerance ntawm qhov ntev |
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OD Tolerance |
WT kam rau ua |
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A, B |
X42 ~ X70 |
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D<60.3mm |
+0.41/-0.40mm |
D<73mm |
+20%/-12.5% |
D<73mm |
+15%/-12.5% |
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D>=60.3 hli |
+0.75/-0.40mm |
D>=73 hli |
+15%/-12.5% |
D>=73 hli |
+15%/-12.5% |
API 5L GR.B PSL2 vs ASME A106 GR.B
| Parameter | API 5L GRB PSL2 | ASME A106 GR.B | Kev cuam tshuam |
|---|---|---|---|
| Standard Positioning | Dedicated rau pipeline tsheb thauj mus los (roj/natural gas) | General -Lub hom phiaj rau cov txheej txheem piping (faiv fab nroj tsuag / boilers) | Qhov tseem ceeb sib txawv hauv daim ntawv thov scenarios |
| Tshuaj muaj pes tsawg leeg | |||
| - Carbon sib npaug (CE) | Tsawg dua lossis sib npaug li 0.43% | Tsawg dua lossis sib npaug li 0.45% | Qis txias cracking susceptibility rau API |
| - Sulfur (S) | Tsawg dua lossis sib npaug rau 0.015% (yuav tsum tau ua rau PSL2) | Tsawg dua lossis sib npaug li 0.035% | Txhim kho sulfur corrosion kuj rau API |
| Mechanical Properties | |||
| - Yield zog | Ntau dua lossis sib npaug li 240 MPa | Ntau dua lossis sib npaug li 240 MPa | Ib qho kev xav tau yooj yim |
| - Lub zog tensile | 415 - 565 MPa | 415 - 585 MPa | Loj overlapping ntau |
| - Tsawg-kub Impact Toughness | Yuav tsum tau(-20℃Ntau dua lossis sib npaug rau 40J) | Tsis xav tau | API haum rau polar/deep- hiav txwv ib puag ncig |
| Tsis yog -Kev kuaj kev puas tsuaj | |||
| - Kev Ntsuas Ultrasonic (UT) | 100% tag nrho cov yeeb nkab lub cev (yuav tsum tau rau PSL2) | Kev tshuaj ntsuam xyuas | API tswj tsis raug yog 10 zaug nruj dua |
| - HIC Test | Yuav tsum tau rau NACE TM0284 | Tsis xav tau | Txhim kho hydrogen-induced cracking resistance rau API |
| Siv tau cov xwm txheej ua haujlwm | |||
| - Tsim Kub | -50 ~ 200 degree | -29 ~ 425 degree | A106 muaj txiaj ntsig zoo hauv kev ua haujlwm siab - kub |
| - Kev ntsuas siab | Siab -Kev xa tawm siab (tsawg dua lossis sib npaug li 25MPa) | Nruab nrab thiab qis - cov tshuab siab (tsawg dua lossis sib npaug li 10MPa) | API muaj zog siab dua -cov kabmob muaj peev xwm |
| - Corrosive Ib puag ncig | Yuav tsum tau qaub roj thiab roj | Tsis yog -corrosive media | Xaiv API rau cov kev pabcuam qaub |
