EN S275J2 steel yog ib qho tsim nyog thiab feem ntau teev cov khoom siv rau kev tsim Longitudinal Submerged Arc Welded (LSAW) kav. Nws yog dav muaj los ntawm ntau cov yeeb nkab steel manufacturers thiab cov neeg muag khoom thoob ntiaj teb [citation: 3, citation: 4, citation: 6, citation: 7, citation: 9].
Nws yog ib qho tseem ceeb kom nkag siab tias "EN S275J2" xaiv tusqib khoom sivntawm steel phaj siv los ua raw khoom [citation:2, citation:6]. Cov yeeb nkab tiav nws tus kheej yog tsim los rau cov khoom siv European tshwj xeeb, feem ntauTS EN 10219-2rau kev siv cov txheej txheem, thiab qib hollow seem raug xaiv los uaS275J2H[siv: 1, citation: 4, citation: 7].
Ntawm no yog cov ncauj lus qhia ntxaws ntxaws rau EN S275J2 LSAW yeeb nkab.
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Khoom Txheem | TS EN 10025-2: Kub- dov cov khoom ntawm cov qauv hlau. Cov txheej txheem no qhia txog cov txheej txheem xa khoom rau steel phaj [citation: 2, citation: 5, citation: 8]. |
| Qib Steel | S275J2: Ib hom non{0}} alloy structural steel qib. Qhov "275" qhia qhov tsawg kawg nkaus tawm lub zog hauv MPa. Cov lus "J2" txhais tau hais tias muaj kev cuam tshuam tsawg kawg nkaus ntawm lub zog27 Joules ntawm -20 degree[siv: 1, citation: 2, citation: 4]. |
| Khoom Txheem | TS EN 10219: Txias-ua welded structural hollow seem ntawm tsis yog- alloy thiab nplua nplej hlau. Qhov no yog tus qauv tshaj plaws rau cov khoom tiav LSAW yeeb nkab [citation: 1, citation: 3, citation: 4, citation: 7, citation: 9]. Lwm cov qauv khoom siv tau suav nrogTS EN 10217(rau lub hom phiaj siab) lossis qhov project- tshwj xeeb specifications [citation:2, citation:5, citation:9]. |
| Txheej txheem | LSAW (Longitudinal Submerged Arc Vuam): Cov kav dej yog tsim los ntawm kev tsim cov hlau phaj rau hauv lub tog raj kheej (siv UOE, JCOE, lossis RBE thev naus laus zis) thiab vuam cov kav ntev ob sab hauv thiab sab nraud siv cov txheej txheem submerged arc [citation: 2, citation: 6, citation: 10]. |
| Tshuaj muaj pes tsawg leeg (max %) [citation:1, citation:7] | |
| Cov pa roj carbon (C): 0.20 | |
| Manganese (Mn): 1.50 | |
| Phosphorus (P): 0.030 | |
| Sulfur (S): 0.030 | |
| Silicon (Si):Tsis xav tau / 0.035 | |
| Mechanical Properties (min) [citation: 1, citation: 7] | |
| Yield Strength (t Tsawg dua los yog sib npaug rau 16mm):275 MPa rau | |
| Yield Strength (16mm |
|
| Tensile zog:410-560 MPa | |
| Elongation: 20% | |
| Impact Properties [citation: 1, citation: 4, citation: 7] | Charpy V-notch Impact Energy:27 J yam tsawg kawg nkaus ntawm-20 degree |
| Hom Loj Ntau Yam [citation: 3, citation: 6, citation: 7, citation: 9] | |
| Sab nraud txoj kab uas hla:168mm txog 1820mm (6 "mus rau 72") | |
| Phab ntsa Thickness:5.0mm txog 60mm | |
| Ntev:3 m txog 18 m (txog 70 m muaj rau kev siv tshwj xeeb xws li piling) | |
| Cov kauj ruam ntawm kev tsim khoom [citation: 2, citation: 10] | 1. steel phaj xaiv thiab ntug milling. 2. Ntug crimping. 3. Kev tsim siv JCOE lossis UOE cov txheej txheem. 4. Sab hauv thiab sab nraud submerged arc vuam. 5. Mechanical expansion (rau UOE/JCOE). 6. Tsis yog- kuaj kev puas tsuaj (Ultrasonic, X-ray). 7. Kev ntsuam xyuas hydrostatic. 8. Xaus ntsej muag thiab beveling. |
| Cov ntawv thov sib xws [citation: 2, citation: 3, citation: 5, citation: 7, citation: 8, citation: 9] | General structural engineering; kev tsim kho vaj tse; txuas txuas; piling foundations; tej yaam num offshore; yeeb nkab pawg rau civil engineering thiab architecture; low-kev sib kis ntawm cov kua (dej, roj, roj); mechanical thiab cog engineering. |
| Daim ntawv pov thawj | Mill Test Certificate feem ntau rauEN 10204 / 3.1[siv: 2, citation: 3]. |
Nkag siab txog European Standards Framework
European system cais covkhoom txheem(dab tsi steel yog ua los ntawm) los ntawmkhoom txheem(yuav ua li cas cov yeeb nkab tiav yog tsim thiab sim).
TS EN 10025-2yog cov khoom txheem rau kub- dov structural steel. Nws txhais cov tshuaj thiab mechanical zog ntawm lubhlau phajnws tus kheej, xws li S275J2 [citation:2, citation:5, citation:8].
TS EN 10219yog tus qauv khoom rautxias- ua welded structural hollow seem. Nws qhia meej txog cov txheej txheem tsim khoom (xws li LSAW), qhov ntev ntev, thiab kev sim ntsuas rau qhov kawgcev khoomUa los ntawm EN 10025 steel phaj [citation: 1, citation: 3, citation: 4, citation: 7, citation: 9].
Yog li ntawd, ib tug ua tiav specification rau cov yeeb nkab no yuav yogTS EN 10219 LSAW yeeb nkab hauv steel qib S275J2H[qhia: 1, citation: 7]. Qhov 'H' hauv qib kev xaiv (piv txwv li, S275J2H) tshwj xeeb qhia tias nws yog ntu ntu uas ua raws li EN 10219 [citation: 1, citation: 4].
Qhov zoo ntawm EN S275J2 LSAW Pipe
| Qhov zoo | Kev piav qhia |
|---|---|
| Kev ntseeg tau muaj zog | Yam tsawg kawg yield zog ntawm275 MPa rau, haum rau ntau yam qauv thiab engineering daim ntaub ntawv [citation: 1, citation: 7]. |
| Zoo heev Low-Tsub Toughness | Lub ntsiab lus "J2" lav qhov cuam tshuam tsawg kawg ntawm lub zog ntawm27 Joules ntawm -20 degree, kom ntseeg tau tias muaj zog txaus rau qhov xav tau ib puag ncig xws li offshore platforms lossis huab cua txias [citation: 1, citation: 2, citation: 4, citation: 7, citation: 8]. |
| Weldability zoo | Tswj chemistry (tsawg carbon sib npaug) ua kom zoo weldability rau kev sib koom ua ke thiab fabrication. |
| Loj Loj Muaj peev xwm | LSAW txheej txheem tso cai rau kev tsim cov kav dej loj - txoj kab uas hla (txog 72 "+) zoo tagnrho rau kev tsim kho thiab kev tsim kho vaj tse loj [citation: 3, citation: 6, citation: 9]. |
| Phab ntsa tuab | Muaj nrog phab ntsa thicknesses mus txog60 mm, muab siab load-cov kabmob muaj peev xwm rau kev thov xws li piling [citation:3, citation:6, citation:7]. |
| Dimensional raug | Niaj hnub no JCOE thiab UOE tsim cov txheej txheem muab kev tswj xyuas meej ntawm cov yeeb nkab qhov ntev [citation: 4, citation: 9]. |
Cov ntsiab lus
Hauv kev xaus,EN S275J2 LSAW pipeyog ib qho zoo- tsim cov khoom lag luam uas sib txuas cov khoom txhim khu kev qha ntawm S275J2 cov qauv hlau nrog cov txheej txheem tsim khoom LSAW. Nws yog feem ntau manufactured rau lubTS EN 10219cov khoom txheem thiab yog dav siv nyob rau hauv kev tsim kho, civil engineering, piling, thiab structural daim ntaub ntawv uas ib tug muaj zog, weldable, thiab loj - txoj kab uas hla steel yeeb nkab yuav tsum tau, tshwj xeeb tshaj yog thaumguaranteed qis-kub toughness mus rau -20 degreeyog tsim nyog [citation:1, citation:3, citation:7, citation:8]. Thaum qhia meej, nws yog qhov zoo tshaj plaws los siv ob qho khoom siv qib (EN 10025-2 S275J2) thiab cov qauv khoom siv (piv txwv li, EN 10219-2 S275J2H) kom ntseeg tau tias cov yeeb nkab ua tau raws li txhua qhov kev xav tau rau nws txoj kev siv.
