Tianjin Lefin Industrial Co., Ltd yog ib qho ntawm cov tuam ntxhab thiab cov muag khoom ntawm api 5l x70 psl2 steel yeeb nkab hauv Suav teb. Thov koj xav tias dawb mus yuav zoo api 5l x70 psl2 steel yeeb nkab los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.
API 5L X70 PSL2 steel yeeb nkab yog ib hom siab - lub zog steel yeeb nkab dav siv hauv kev thauj cov roj thiab roj kav.
| Yam ntxwv qeb | Specific Indicators/Requirements |
| Txheem theem | API SPEC 5L (American Petroleum Institute standard), cov khoom specification qib 2 (PSL2) |
| kev siv zog index | Yam tsawg kawg nkaus yield zog Ntau tshaj los yog sib npaug rau 485 MPa (70 ksi); Tensile zog 570 - 760 MPa |
| Toughness xav tau | Feem ntau, tus nqi nruab nrab ntawm Shiba cuam tshuam lub zog ntawm 0℃yuav tsum yog: longitudinal Ntau dua lossis sib npaug rau 41J, transverse Ntau dua lossis sib npaug rau 27J |
| Tshuaj muaj pes tsawg leeg: | Tsawg- carbon microalloying tsim, cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.24% (PSL2); Feem ntau ntxiv microalloying ntsiab xws li Nb, V, Ti, thiab lwm yam. |
| Yam txheej txheem | Seamless dov (SMLS), ncaj seam submerged arc vuam (LSAW), tsis kam vuam (ERW), thiab lwm yam. |
| Kev soj ntsuam zoo | Ua tsis yog- kuaj kev puas tsuaj xws li ultrasonic thiab X- kev tshuaj xyuas kab hluav taws xob ntawm txhua daim; ua cov kev ntsuam xyuas hydrostatic. |
| Cov ntawv thov tseem ceeb | Ntev- cov kav dej nyob deb ntawm thaj av thiab hauv hiav txwv, cov kav dej hauv thaj chaw acidic, cov kav dej hauv thaj chaw txias heev, thiab siab - cov roj sib txuas hauv nroog. |
Hauv -Kev nkag siab tob txog PSL2 Qib
PSL (Product Specification Level) yog lub ntsiab lus tseem ceeb hauv API 5L tus qauv, siv los sib txawv cov qib zoo sib txawv. PSL2 yog qhov nruj dua li PSL1, feem ntau tshwm sim hauv cov hauv qab no:
• Tswj nruj dua ntawm cov khoom siv tshuaj:
PSL2 txwv nruj dua rau cov ntsiab lus ntawm cov ntsiab lus xws li carbon, sulfur, thiab phosphorus, txhawm rau txhim kho cov weldability thiab corrosion kuj.
• Ntau dua toughness yuav tsum tau:
PSL2 tswj hwm qhov kev coj ua ntawm Schaeffer V- qhov ntsuas qhov cuam tshuam los xyuas kom meej tias cov yeeb nkab steel tuaj yeem tiv taus qhov tawg ntawm qhov kub thiab txias, thaum PSL1 tsis muaj qhov yuav tsum tau ua.
• Kev ntsuam xyuas tsis zoo -kev puas tsuaj:
PSL2 tau txiav txim siab tias tag nrho tsis yog - kev tshuaj xyuas kev puas tsuaj ntawm tag nrho cov yeeb nkab lub cev (xws li ultrasonic lossis radiographic kuaj) yuav tsum tau ua rau txhua cov yeeb nkab steel txhawm rau txhawm rau txhawm rau txhawm rau ua kom muaj qhov tsis zoo sab hauv.
Sizing thiab Application suggestions
Thaum xaiv thiab siv API 5L X70 PSL2 steel kav hauv cov haujlwm tiag tiag, muaj ob peb lub ntsiab lus tseem ceeb uas yuav tsum tau saib xyuas tshwj xeeb:
• Ua tib zoo saib xyuas cov cai ntxiv:
Rau cov kav hlau uas siv rau hauv cov cheeb tsam acidic uas muaj hydrogen sulfide (H₂S), nws yog ib qho tsim nyog los xyuas kom meej tias lawv ua tau raws li cov kev cai ntxiv rau kev tiv thaiv hydrogen -induced cracking (HIC) thiab/los yog tsis kam sulfide stress cracking (SSC), raws li tau teev tseg hauv cov qauv xws li NACE MR0175/ISO 15156.
• Paub meej tias qhov khoom xa tuaj:
Kev ua tau zoo ntawm cov kav hlau steel yog ze ze rau lawv cov kev kho cua sov hauv xeev (kev xa khoom). Lub xeev xa khoom ntawm X70 PSL2 suav nrog "Q" (quenching + tempering) lossis "M" (thermomechanical tswj dov). Cov kav dej hauv lub xeev "Q" (quenching thiab tempering kho) feem ntau muaj cov khoom siv zoo dua qub, tshwj xeeb tshaj yog toughness thiab weldability.
• Ua tib zoo saib ntawm - qhov chaw vuam:
Lub X70 steel muaj lub zog siab, thiab ntawm - qhov chaw ncig qhov chaw vuam yuav tsum tau tswj cov txheej txheem nruj. Cov kev ntsuas tseem ceeb suav nrog: preheating saum 100℃los tiv thaiv cov kab nrib pleb; siv tsawg- cov khoom siv hydrogen vuam (xws li E6010 electrode rau hauv paus vuam); thiab nruj welding neeg ua haujlwm kev cob qhia thiab kev soj ntsuam cov txheej txheem.
Cim npe nrov: api 5l x70 psl2 steel yeeb nkab, Tuam Tshoj, lwm tus neeg, manufacturers, hoobkas, nqe
