EN S355J2 steel yog tus qauv thiab dav siv siab - lub zog ntawm cov qauv rau kev tsim Longitudinal Submerged Arc Welded (LSAW) kav. Nws feem ntau tau teev tseg rau kev thov cov qauv tsim thiab engineering, tshwj xeeb tshaj yog qhov uas tau lees paub qhov tawv ntawm sub-zero kub mus txog -20℃yuav tsum tau. Cov yeeb nkab tiav lawm feem ntau yog tsim los rauTS EN 10219khoom txheem rau txias- tsim welded structural hollow seem, qhov twg nws raug xaiv raws liS355J2H .
Ntawm no yog cov ncauj lus kom ntxaws specification rau EN S355J2 LSAW yeeb nkab (tsim li S355J2H).
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 qauv no qhia txog cov txheej txheem kev xa khoom rau covhlau phaj . |
| Qib Steel | S355J2: High -lub zog steel qib. Qhov "355" 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 . |
| Khoom Txheem | EN 10219-1 / -2: Txias-ua welded structural hollow seem ntawm tsis yog- alloy thiab nplua nplej hlau. Qhov no yog tus txheej txheem tswj hwm rau cov khoom tiav LSAW yeeb nkab, nrog rau qib hollow seem uas yogS355J2H . |
| 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 JCOE, UOE, lossis RBE thev naus laus zis) thiab vuam cov kav ntev ntev ob sab hauv thiab sab nraud siv cov txheej txheem submerged arc. Cov txheej txheem no yog qhov zoo- haum rau kev tsim cov kav loj - txoj kab uas hla nrog cov phab ntsa tuab . |
| Chemical Composition (Max%) | |
| Cov pa roj carbon (C): 0.22 | |
| Silicon (Si): 0.55 | |
| Manganese (Mn): 1.60 | |
| Phosphorus (P): 0.030 | |
| Sulfur (S): 0.030 | |
| Mechanical Properties (min) | |
| Yield Strength (t Tsawg dua los yog sib npaug rau 16mm):355 MPa rau | |
| Yield Strength (16mm |
|
| Tensile Strength (t Tsawg dua lossis sib npaug li 40mm):470-630 MPa | |
| Elongation: 20% | |
| Impact Properties | Charpy V-notch Impact Energy:27 J yam tsawg kawg nkaus ntawm-20 degree |
| Hom Loj Loj | |
| Sab nraud txoj kab uas hla:219mm txog 2134mm (8 "mus rau 84") | |
| Phab ntsa Thickness:5.0mm txog 80mm | |
| Ntev:3 m txog 18.3 m (txog 75 m muaj rau kev siv tshwj xeeb xws li piling) | |
| Cov kauj ruam tsim khoom | 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 siv | Offshore platforms; marine qauv; siab -load piling foundations; kev tsim kho choj; siab- nce lub tsev txhawb nqa kab; cua zog yees; cov qauv thav duab nyob rau hauv cov huab cua txias; daim ntawv thov yuav tsum tau lav qis -kub toughness. |
| Daim ntawv pov thawj | Mill Test Certificate feem ntau rauEN 10204 / 3.1 . |
Nkag siab txog Qib Qib
Lub npeS355J2HUa raws li cov qauv kev xav tau teev tseg hauv EN 10219 thiab EN 10025:
| Cheebtsam | Lub ntsiab lus |
|---|---|
| S | Cov qauv hlau |
| 355 | Yam tsawg kawg yield zog ntawm355 MPa rau(rau thicknesses Tsawg dua los yog sib npaug rau 16mm) |
| J2 | Impact test xav tau:27 Joules yam tsawg kawg nkaus ntawm -20 degree |
| H | Ntug Hollow(Ua raws li EN 10219) |
Qhov zoo ntawm EN S355J2 LSAW Pipe (S355J2H)
| Qhov zoo | Kev piav qhia |
|---|---|
| Siab zog | Yam tsawg kawg yield zog ntawm355 MPa rau- siab dua S275 qib, tso cai rau cov phab ntsa nyias nyias lossis siab dua cov peev txheej hauv cov qauv tsim. |
| Zoo heev Low-Tsub Toughness | Lub ntsiab lus "J2" lav qhov cuam tshuam tsawg kawg ntawm lub zog ntawm27 Joules ntawm -20 degree, ua kom muaj zog txaus rau qhov xav tau ib puag ncig xws li offshore platforms, huab cua txias, thiab kev tsim kho lub caij ntuj no. |
| Weldability zoo | Tswj chemistry ua kom zoo weldability rau kev sib koom ua ke thiab fabrication, uas yog ib qho tseem ceeb rau kev siv cov qauv. |
| Loj Loj Muaj peev xwm | LSAW txheej txheem tso cai rau kev tsim cov kav loj - txoj kab uas hla (txog 84 "+) zoo tagnrho rau kev tsim kho loj thiab kev tsim kho vaj tse. |
| Phab ntsa tuab | Muaj nrog phab ntsa thicknesses mus txog80 hli, muab qhov tshwj xeeb thauj khoom-cov kabmob muaj peev xwm rau cov ntawv thov xws li kev sib sib zog nqus hauv paus . |
| Dimensional raug | Niaj hnub nimno JCOE thiab UOE tsim cov txheej txheem muab kev tswj xyuas meej ntawm cov yeeb nkab qhov ntev (piv txwv li, OD kam rau ua ± 0.3%), ua kom zoo ib yam thiab yooj yim ntawm installation. |
| Ua pov thawj hauv Cov Haujlwm Loj | Feem ntau siv nyob rau hauv offshore platforms, choj kev tsim kho, thiab loj -scale infrastructure tej yaam num thoob ntiaj teb . |
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 ua tiav thiab kuaj):
TS EN 10025-2yog cov khoom txheem rau kub- dov structural steel. Nws txhais cov tshuaj thiab mechanical zog ntawm lubhlau phajnws tus kheej.
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 khoom .
Yog li ntawd, ib tug ua tiav specification rau cov yeeb nkab no yuav yogTS EN 10219 LSAW yeeb nkab hauv steel qib S355J2H. Cov tuam txhab loj sau npe S355J2H raws li tus qauv muab hauv lawv cov EN 10219 LSAW yeeb nkab ntau lawm.
Cov ntsiab lus
Hauv kev xaus,EN S355J2 LSAW pipe(yog teev raws liS355J2Hrau EN 10219) yog tus nqi zoo, zoo -tsim siab - lub zog steel yeeb nkab. Nws combines qhov tsawg kawg nkaus tawm los lub zog ntawm355 MPa raunrog lav tsawg-kub toughness ntawm27 Joules ntawm -20 degree, ua rau nws qhov kev xaiv zoo tshaj plaws rau cov kev xav tau tshaj plaws ntawm cov qauv siv xws lioffshore platforms, marine structures, choj kev tsim kho, siab-cov tsev nce siab, thiab cov hauv paus tob hauv cov huab cua txias. Cov txheej txheem tsim khoom ntawm LSAW tso cai rau kev tsim cov kab loj loj (txog 84 "+) nrog cov phab ntsa tuab (txog 80 hli), muab qhov tshwj xeeb thauj khoom -cov kabmob muaj peev xwm rau cov haujlwm loj hauv kev tsim kho .Thaum qhia meej, siv ob qho tib si cov qauv khoom thiab qib (xws li,EN 10219 S355J2H LSAW yeeb nkab) kom ntseeg tau tias cov yeeb nkab ua tau raws li txhua qhov kev xav tau rau nws txoj kev siv.
