ERW yeeb nkab kev tseev kom muaj
ERW cov kav dej txhais tau tias Cov Hluav Taws Xob Kuj Ruaj Khov Welded. ERW steel kav dej thiab cov tub luam siv.
ERW steel kav thiab raj muaj ntau yam zoo, phab ntsa tuab, thiab cov diameters ntawm cov kav dej tiav.
| Kev cai siv | Rau kev thauj roj thiab roj | Rau siab ua kua dej conveying |
| Cov khoom siv | Gr.b | Gr.b |
| Lub cev raj taub | D ＜ 508mm, ± 0.75%; D≥508mm, ± 0.75% | D≤168.3,±1.0%; 168.3＜D≤508,±0.75%; |
| Phab ntsa tuab | D ＜ 508mm, +15.0% ， - 12.5%; D≥508mm, +17.5% ， - 10% | ±12.5% |
| Dabtsi Yog Khoov | ≤0.2% | ≤0.2% |
| Ovality | D≥508mm ≤ ≤% 1% | ≤±0.75% |
| Bevel | 1.59mm | ≤5mm |
| Kev ntsuam xyuas hydrostatic | 100% | 100% |
| Kev kuaj tsis raug tshem tawm | 100% tsis-kev puas tsuaj weld kuaj xyuas | Ultrasonic qhov khuam pom yog 100% |
ERW yeeb nkab kev tseev kom muaj
ERW steel kav dej thiab cov tub raj siv ntau txoj haujlwm tsim txua lub laj kab, laj kab, ntsia hlau, kab hlau kab thiab lwm yam.Ua haujlwm ntau zog ntawm N80 siab dua J55 txog 173 ~ 206 MPa.
Ntawm tib thaj tsam ntawm tus qauv, qhov txiav ntawm N80 yog siab dua J55.
Raws li qhov loj me, tib lub qauv kev coj ua, tib tus qauv ntsuas qhov loj me, J55 qib qib txuas, txuas ntim txuas, txuas txuas txuas cov khoom, txuas ib nrab thiab txuas cov khoom txuas tuaj yeem nqus qis dua N80 steel qib.
Qhov tsis zoo los ntsuas kev ntsuas ntawm cov yeeb nkab tsis sib haum, txuas txoj hlua khi, txuas raj nrog J55 thiab N80 yog qhov sib txawv.
J55 thiab N80 qib steel tsis yog tib xim: ntev ntau dua los yog sib npaug li 1.8m, J55 pleev xim ntsuab zoo nkauj, N80 pleev xim rau xim liab;
J55 xaiv los ntawm cov chaw tsim khoom, lossis teeb tsa raws li kev txiav txim tau teev ntev normalized (N), normalizing thiab tempering (N& T) lossis quenching thiab tempering (Q& T). N80 yog qhov tseem, kev tiv thaiv tshav kub ntev uas tsim nyog yuav tsum tau ua. Los ntawm cov chaw tsim khoom xaiv rau normalizing (N) lossis normalizing thiab tempering (N& T) + quenching (Q).
