Nyob rau hauv lub ntiaj teb tseem ceeb ntawm cov roj thiab roj infrastructure, precision tsis yog ib qho kev nyiam xwb -nws yog qhov yuav tsum tau muaj kev nyab xeeb.API 5L yeeb nkab kam rau uatxhais cov kev sib txawv uas tso cai rau hauv kev tsim cov kav dej, kom ntseeg tau tias txhua ntu ntawm lub raj xa dej haum zoo kawg nkaus thaum lub sijhawm vuam thiab tiv taus kev ua haujlwm hnyav.
Kev nkag siab txog cov kev zam no yog qhov tseem ceeb rau cov kws tsim khoom thiab cov neeg saib xyuas kev yuav khoom kom tsis txhob muaj nqi qeeb hauv qhov chaw thiab xyuas kom ua raws liTS EN ISO 3183thiabAPI 5Lqauv.
API 5L Pipe Tolerances yog dab tsi?
Ib qho "tolerance" yog qhov tso cai txwv ntawm kev hloov pauv hauv lub cev. RauAPI 5L kab kav, cov kev txwv no siv rau sab nraud txoj kab uas hla (OD), phab ntsa thickness (WT), qhov hnyav, thiab ncaj. Cov qauv no txawv nyob ntawm seb cov yeeb nkab puas yogSeamless (SMLS)los yogWelded (ERW, LSAW, SSAW), thiab seb nws puas raug cais raws liPSL1los yogPSL2.
1. Sab nraud txoj kab uas hla (OD) Tolerances
Sab nraud txoj kab uas hla yog qhov tseem ceeb rau kev sib dhos thaum lub voj voog vuam.API 5L qhiasib txawv tolerances rau cov yeeb nkab lub cev thiab cov yeeb nkab kawg (qhov kawg 4 ntiv tes los yog 100mm ntawm cov yeeb nkab).
- Lub cev lub cev:Rau cov kav dej nrog OD ntawm 6.625 ntiv tes (168.3 hli), tus qauv kam rau ua txoj kab uas hla yog feem ntau 0.75%.
- Cov yeeb nkab kawg:Tolerances ntawm qhov kawg yog nruj dua los xyuas kom meej seamless haum-up. Rau kev kam rau siab loj yog feem ntau capped ntawm -0.4 mm txog +l.6 mm.
- Tawm - ntawm -Roundness (Ovality):Ntawm cov yeeb nkab kawg, qhov sib txawv ntawm qhov siab tshaj plaws thiab qhov tsawg kawg nkaus OD yuav tsum tsis pub tshaj 1% mus rau 1.5% ntawm cov kab uas tau teev tseg, nyob ntawm qhov piv ntawm D / t.
2. Phab ntsa Thickness (WT) Tolerances
Phab ntsa thickness ncaj qha cuam tshuam rau lub siab- muaj peev xwm ntawm cov kav dej. API 5L muab qhov tshwj xeeb "ntxiv" thiab "tshem tawm" feem pua raws li cov yeeb nkab loj thiab txoj kev tsim khoom.
Seamless Yeeb Nkab (SMLS):
- Rau WT4.0 mm, qhov kam rau ua yog +0.6 mm / - 0.5 mm.
- Rau WT25.0mm, qhov kam rau siab tuaj yeem siab li 3.75 hli lossis 10%.
Welded yeeb nkab (HFW / ERW / SAW):
Welded kav feem ntau muaj nruj dua thickness tswj dua seamless kav.
- Rau WT< 5.0 mm, the typical tolerance is 0.5 mm.
- Rau WT15.0mm, qhov kam rau ua yog 1.5 hli.
3. Nyhav thiab Ntev Tolerances
Rau cov phiaj xwm loj -, qhov hnyav hnyav yog qhov tseem ceeb rau kev thauj mus los thiab kev suav cov qauv.
Tib Ntev: Qhov hnyav ntawm ib tus neeg cov yeeb nkab ntev yuav tsum tsis txhob sib txawv ntau dua -3.5% rau +10% ntawm cov lej suav.
Carload ntau: Rau kev xa khoom ntau (carloads), qhov sib npaug ntawm qhov hnyav yog nruj dua, feem ntau yog 1.75%.
Ntev: Thaum cov kav dej feem ntau raug txiav txim nyob rau hauv "Double Random Lengths" (kwv yees . 12 m), API5L yuav tsum muaj qhov ntev nruab nrab ntawm tag nrho cov kev txiav txim los tiv thaiv cov khoom luv luv.
4. Qhov ncaj thiab qhov tsis xws luag
Ib lub raj xa dej uas tsis ncaj yog yuav luag tsis yooj yim rau nteg kom raug.
Kev ncaj: Tag nrho qhov sib txawv ntawm txoj kab ncaj nraim yuav tsum tsis pub tshaj 0.2% ntawm tag nrho qhov ntev.
Deg Imperfections: API 5L tso cai rau me me nto khawb, tab sis tej yam tsis xws luag tob tshaj 12.5% ntawm nominal phab ntsa thickness yog suav tias yog ib tug "rejectable defect" thiab yuav tsum tau kho los yog tshem tawm.
Summary Table: Quick Reference forAPI 5L yeeb nkab kam rau ua
| Parameter | SMLS Yeeb Nkab Tolerance |
Welded Yeeb Nkab Tolerance |
|
| OD | ±0.75% (for D>168.3 hli) | ±0.75% | |
| Phab ntsa Thickness | +15%/−12.5% (nws txawv ntawm qhov loj me) |
± 10% ~ 0.5 hli |
|
| Qhov hnyav (ib leeg) | +10%/−3.5% | +10%/−3.5% | |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.2% ntawm tag nrho qhov ntev |
Tsawg dua lossis sib npaug li 0.2% ntawm tag nrho qhov ntev |
Kev Tshawb Fawb Txog Kev Tshawb Fawb: Vim li cas Kev Tolerances Matter rau PSL2
HauvPSL2(Product Specification Level 2) daim ntaub ntawv- feem ntau yog siv nyob rau hauv siab - siab los yog corrosive gas ib puag ncig- cov kev cai rau cov tshuaj muaj pes tsawg leeg thiab toughness yog ntau nruj dua PSL1. Yog li ntawd, qhov sib npaug ntawm qhov sib npaug yuav yog qhov tseem ceeb tshaj plaws los tswj kev ncaj ncees ntawm qib siab -lub zog steel xws liX60, X65, lossis X70.
Xav tau cov ncauj lus kom ntxaws API 5L yeeb nkab kam rau ua rau koj cov yeeb nkab OD thiab Teem sijhawm?[ Hu rau peb pab pawg kws tshaj lij] rau qhov kev cai API 5L qhov ntev thiab daim ntawv kam rau ua raws li koj qhov project.
Email:baohui@bhsteelpipe.com
