Tom ntej: API 5L X60 PSL1 yog dab tsi?
API 5L:Qhov no yog cov txheej txheem tshwj xeeb uas tau teev tseg los ntawm American Petroleum Institute (API) uas tswj hwm kev tsim khoom ntawm "Line Pipe" siv rau kev thauj mus los hauv cov kav dej hauv kev lag luam roj av thiab cov nkev.
X60:Qhov no yog qhovQibntawm cov hlau. Qhov "X" qhia txog qhov siab - lub zog, qis- hlau alloy (HSLA), thiab "60" txhais tau tiasYam tsawg kawg yield zog ntawm 60,000 psi(los yog 414 MPa). Yield zog yog qhov kev nyuaj siab uas cov khoom pib deform plastically.
PSL1:Qhov no sawv rauKhoom Specification Qib 1. Nws yog tus qauv theem ntawm cov kev xav tau, muab qhov sib npaug zoo ntawm lub zog, kev tsim khoom, thiab tus nqi.
Cov yam ntxwv tseem ceeb thiab tshuaj lom neeg / Mechanical Properties
PSL1 cov kav dej muaj cov txheej txheem tshuaj lom neeg thiab cov khoom siv tau yooj yim dua piv rau PSL2, ua rau lawv siv nyiaj ntau dua thiab tsim nyog rau cov cheeb tsam uas xav tau tsawg dua.
Chemical Composition (PSL1 tsis tshua muaj kev txwv)
Rau PSL1, API 5L tus qauv tsis tso cai tshwj xeeb cov tshuaj muaj pes tsawg leeg txwv rau txhua yam. Hloov chaw, nws tsom mus rau kev ua tiav cov khoom siv kho tshuab uas xav tau (lub zog, toughness). Cov chaw tsim khoom muaj kev ywj pheej xaiv cov tshuaj pleev ib ce kom ua tau raws li cov khoom no. Txawm li cas los xij, nws feem ntau yog carbon-manganese steel nrog micro- alloying ntsiab xws li Niobium (Nb) lossis Vanadium (V) kom ua tiav X60 lub zog.
Mechanical Properties (Qhov tseem ceeb tshaj plaws rau PSL1)
| Khoom | Kev xav tau rau X60 PSL1 |
|---|---|
| Yield zog (min) | 60,000 psi (414 MPa) |
| Tensile zog (min) | 75,000 psi (517 MPa) |
| Yield-rau-Tensile Ratio (max) | Tsis tau teev rau PSL1(Qhov no yog qhov sib txawv tseem ceeb ntawm PSL2). |
| Elongation (min) | Nws txawv nrog qhov loj ntawm cov qauv kuaj, raws li cov qauv qauv hauv API 5L specification. |
| Charpy V-Ntch Impact Test | Tsis xav tau rau PSL1.(Qhov no yog lwm qhov sib txawv loj ntawm PSL2, uas yuav tsum muaj cov qib toughness tshwj xeeb). |
Cov txheej txheem tsim khoom
API 5L X60 PSL1 yeeb nkab tuaj yeem tsim siv ob txoj hauv kev:
Seamless (SMLS):Ua los ntawm kev tho lub pob zeb ntawm cov hlau los ua cov yeeb nkab tsis muaj seam. Feem ntau siv rau siab - cov ntawv thov siab thiab cov kab me me.
Welded (ERW / SAW):
Electric Resistance Welded (ERW):Cov yeeb nkab yog tsim los ntawm steel phaj (skelp) thiab cov seam yog welded los ntawm kev siv hluav taws xob tam sim no thiab siab. Feem ntau rau ntau qhov ntau thiab tsawg.
Submerged Arc Welded (SAW):Cov yeeb nkab yog tsim los ntawm cov hlau phaj thiab cov seam yog welded siv ib qho arc nyob rau hauv ib daim pam ntawm flux. Qhov no yog ib qho tseem ceeb rau cov kav loj - txoj kab uas hla (LDP) siv hauv cov kav dej loj.
Qhov zoo ntawm PSL1
Tus nqi -zoo:Cov kev cai nruj me ntsis (tsis muaj qhov yuav tsum tau kuaj xyuas, tsis muaj qhov nruj Y / T piv, so chemistry) ua rau nws pheej yig dua los tsim dua PSL2.
Txaus rau ntau daim ntawv thov:Ua tau zoo txaus rau ntau cov kav dej ntawm ntug dej, cov kab ntws, thiab cov kab sib sau ua ke qhov kev ua haujlwm siab thiab ib puag ncig (tshwj xeeb tshaj yog kub) tsis yog huab cua.
Dav Muaj:Raws li cov qib sib txawv, nws yog tsim los ntawm cov mills thoob ntiaj teb thiab tau yooj yim muaj.
Kev txwv ntawm PSL1 vs. PSL2
Tsis tas yuav tsum toughness:Qhov tsis muaj Charpy Impact test yuav tsum tau txhais tau hais tias cov yeeb nkab tsis kam ua kom tawg tawg tsis tau lees paub. Qhov no ua rau nws tsis tsim nyog rau qhov qis - qhov kub thiab txias ib puag ncig lossis daim ntawv thov qhov kev poob siab yog qhov kev txhawj xeeb.
Tsis muaj qhov siab tshaj plaws Y / T:Lub siab Yield-rau-Tensile piv tuaj yeem yog qhov tsis xav tau rau kev ncaj ncees ntawm cov kav xa dej thaum muaj xwm txheej hnyav (xws li hauv av txav), vim nws txo qhov muaj peev xwm deformation ua ntej ua tsis tiav. PSL2 teeb tsa qhov siab tshaj plaws ntawm qhov piv txwv no.
Stricter Dimensional Tolerances rau PSL2:PSL2 feem ntau muaj nruj dua tswj ntawm qhov ntev xws li phab ntsa thickness, txoj kab uas hla, thiab ncaj.
Cov ntawv thov siv
API 5L X60 PSL1 yog cov neeg ua haujlwm hauv kev lag luam hluav taws xob rau:
Onshore Natural Gas Transmission Pipelines
Crude Roj Transmission Pipelines
Cov kav dej(piv txwv li, diesel, roj av)
Dej Txhaj Kabnyob rau hauv cov roj teb
Flow Kablos ntawm lub qhov dej mus rau thawj qhov chaw ua haujlwm
Qauv Piling & Txhawb nqa(hauv qee qhov tsis yog -pipeline daim ntawv thov)
Cov ntsiab lus: Thaum twg los xaiv API 5L X60 PSL1
Xaiv cov yeeb nkab qib no thaum koj xav tau atus nqi- zoo, siab - lub zog kab yeeb nkabrau cov qauv - cov ntawv thov haujlwm, feem ntaunyob ntug dej hiav txwv, qhov chaw ua haujlwm kubsaum toj no khov (0℃/ 32℃F)thiab qhov kev pheej hmoo ntawm kev cuam tshuam lossis kev poob siab yog tsawg.
Yog tias koj qhov phiaj xwm xav tau kev ua haujlwm hauv huab cua txias, muaj - kev xav tau hnyav, lossis raug cai nruj dua kev nyab xeeb (xws li ntau qhov haujlwm siab - siab nyob rau sab ntug dej hiav txwv), koj feem ntau yuav qhia qhov muaj zog duaAPI 5L X60 PSL2xwb.
