API 5L Gr yog dab tsi? B?
API 5Lyog ib qho specification luam tawm los ntawm American Petroleum Institute (API) uas npog seamless thiab welded steel kab yeeb nkab. Nws yog tus txheej txheem thoob ntiaj teb rau cov kav dej siv hauv kev sib kis ntawm cov roj, roj, thiab dej hauv cov kav dej hauv kev thauj mus los.
Qib B("Gr. B") yog qib feem ntau thiab theem pib hauv qhov kev qhia tshwj xeeb no. Nws qhia txog qhov tsawg kawg nkaus lub zog ntawm 35,000 psi (241 MPa) thiab lub zog tensile yam tsawg kawg nkaus ntawm 60,000 psi (414 MPa).
Cov yam ntxwv tseem ceeb & Khoom
Khoom siv:Cov pa roj carbon steel, nrog cov ntsiab lus tsis tshua muaj carbon rau qhov zoo weldability thiab formability.
Cov txheej txheem tsim khoom:
Seamless (S):Cov yeeb nkab tsim los ntawm cov khoom siv hlau tsis muaj vuam seam. Txaus siab rau kev siv siab -siab.
Electric Resistance Welded (ERW):Cov yeeb nkab tsim los ntawm cov ntawv dov thiab welded raws nws qhov ntev siv hluav taws xob tsis kam. Tus nqi- siv tau thiab zoo rau ntau daim ntawv thov.
Submerged Arc Welded (SAW):Cov yeeb nkab tsim los ntawm phaj thiab welded nrog arc submerged nyob rau hauv ib txheej flux. Siv rau txoj kab uas hla loj.
Lub zog:
Yam tsawg kawg nkaus Yield Strength:35,000 psi (241 MPa)
Yam tsawg kawg Tensile Strength:60,000 psi (414 MPa)
Tshuaj muaj pes tsawg leeg:Cov muaj pes tsawg leeg yog tswj los xyuas kom meej txhua yam khoom thiab weldability. Nws feem ntau muaj cov hlau (Fe) nrog Carbon (C), Manganese (Mn), thiab tsawg, tsawg tsawg ntawm Phosphorus (P) thiab Sulfur (S).
Common Specifications thiab Standards
Primary Standard: API SPEC 5L(Cov ntawv tshiab kawg yog 46th Edition, tab sis tej yaam num feem ntau hais txog cov qauv tshwj xeeb xws li 45th lossis 44th).
Kev Xa Khoom:
API 5L PSL1 (Product Specification Level 1): Cov txheej txheem theem nrog cov txheej txheem tshuaj thiab cov khoom siv kho tshuab.
API 5L PSL2 (Product Specification Level 2): Ib qib nruj dua nrog kev tswj nruj dua ntawm chemistry, muaj zog dua (Charpy impact test), thiab kev sim ntxiv.
Common Supplementary Standards:
ASTM A53 Gr. B:Ib qho zoo sib xws thiab feem ntau sib hloov tau los ntawm ASTM International. Thaum API 5L tsom rau kev thauj mus los, A53 yog siv rau lub hom phiaj dav dav thiab qis - cov kav dej siab. Lawv feem ntau yog dual- ntawv pov thawj.
ASTM A106 Gr. B:Rau siab -kev pabcuam kub (piv txwv li, chav dej). Nws muaj qhov sib txawv me ntsis chemistry thiab feem ntau seamless.
Qhov zoo thiab cov txiaj ntsig
Tus nqi -zoo:Raws li qib theem pib ntawm carbon steel, nws yog ib qho kev xaiv pheej yig tshaj plaws rau cov yeeb nkab.
Weldability zoo heev:Nws qhov sib npaug ntawm cov pa roj carbon tsawg ua rau nws yooj yim rau vuam siv cov txheej txheem uas tsis muaj ua ntej - lossis tom qab - kho cua sov hauv feem ntau thicknesses.
Lub zog zoo - rau - Qhov hnyav piv:Muab qhov sib npaug ntawm lub zog thiab tswj tau qhov hnyav rau kev tsim kho thiab kav dej.
Muaj Muaj:Nws yog qib siab tshaj plaws steel yeeb nkab qib, muaj nyob rau hauv ntau qhov ntau thiab tsawg thiab cov sij hawm (phab ntsa thicknesses) los ntawm cov neeg muag khoom thoob ntiaj teb.
Ductility thiab Formability:Nws tuaj yeem khoov thiab tsim rau ib qho kev kawm tsis muaj cracking.
Daim ntawv thov
API 5L Gr. B yeeb nkab yog ntau yam thiab siv nyob rau hauv ib tug dav array ntawm industries tshaj nws thawj lub hom phiaj rau roj thiab roj:
Roj thiab Gas Pipelines:Rau kev sib sau ua ke, cov kab sib txuas, thiab kev sib txuas sib txuas rau cov roj av, roj av, thiab cov khoom ua kom zoo.
Kev xa dej:Rau cov kav dej hauv nroog, cov kav dej phwj tuaj, thiab cov kav dej ua haujlwm.
Kev siv tus qauv:Feem ntau siv los ua kem, pawg, thiab cov tswv cuab hauv kev tsim kho vim nws lub zog thiab muaj (tab sis nws tsis yog technically ASTM cov qauv spec zoo li A500).
Piling:Siv los ua pawg hauv paus hauv kev tsim kho.
Industrial kav dej:Rau cov txheej txheem kab, compressed cua tshuab, thiab lwm yam kev lag luam kua tuav.
Fencing thiab Scaffolding:Ib qho khoom siv rau lub moj khaum thiab kev txhawb nqa.
Sib piv nrog Lwm Qib (PSL1)
| Feature | API 5L Qib B | API 5L Qib X42 | API 5L Qib X52 | API 5L Qib X65 |
|---|---|---|---|---|
| Min. Yield zog | 35,000 psi (241 MPa) | 42,000 psi (290 MPa) | 52,000 psi (359 MPa) | 65,000 psi (448 MPa) |
| Min. Tensile zog | 60,000 psi (414 MPa) | 60,000 psi (414 MPa) | 66,000 psi (455 MPa) | 77,000 psi (531 MPa) |
| Nqi | qis tshaj | Nruab nrab | Siab dua | Siab tshaj |
| Weldability | Yooj yim tshaj | Zoo | Yuav tsum tau saib xyuas ntxiv | Yuav tsum muaj cov txheej txheem nruj |
| Kev siv yam | Tsawg / Med Siab, Cov Qauv | Cov kab nruab nrab siab | Siab -Hloov kis | Siab -Siab, Dej tob, Arctic |
Cov ntsiab lus tseem ceeb thaum xaj xaj
Loj (NPS & OD):Nominal Pipe Loj thiab meej Sab Nraud Diameter.
Phab ntsa Thickness (Schedule):Piv txwv li, Schedule 40, STD, XS, los yog XXS. Qhov no txiav txim siab qhov ntsuas siab.
Hom kev tsim khoom:Seamless (S) lossis Welded (ERW, SAW).
Ntev:Random (RLL) lossis Ib Leeg Random Length (SRL), lossis teev txiav ntev.
Xaus Xaus:Plain kawg, beveled kawg (rau vuam), los yog threaded thiab ua ke.
Specification & Certification:Xyuas kom paub tseeb tias daim ntawv pov thawj zeb xeem (MTC) tau muab, lees paub cov yeeb nkab raws li API 5L Gr. B (thiab lwm yam kev cai xws li A53).
Hauv cov ntsiab lus,API 5L Gr. B Carbon Steel Yeeb Nkabyog lub chaw ua haujlwm ntawm cov kav dej hauv kev lag luam, muaj nuj nqis rau nws qhov sib npaug ntawm lub zog, weldability, muaj, thiab nqi. Nws yog qhov kev xaiv ua ntej rau suav tsis txheeb uas yuav tsum muaj kev txhim khu kev qha thiab kev lag luam ntawm cov dej xa tawm lossis kev txhawb nqa cov qauv.
