Txheej txheem cej luam ntawm Cov Qauv
Ob tus qauv txhais cov kev cai rau carbon steel qauv tubing uas tsim los ntawm txias- kev sib sau thiab vuam, tab sis lawv yog los ntawm cov kev cai sib txawv thiab cov tswv yim tsim.
ASTM A500 (Standard Specification for Cold{1}}Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes)yog tus qauv dav dav hauv North America thiab ntau thaj chaw uas cuam tshuam los ntawm US engineering xyaum. Nws npog puag ncig, square, duab plaub, thiab cov duab tshwj xeeb rau cov txuas hniav, cov tsev, thiab cov hom phiaj dav dav. Tus qauv yog tswj hwm los ntawm ASTM International.
TS EN 10219 (Tshooj 10219 welded structural hollow seem ntawm non-alloy thiab fine grain steels)yog tus qauv kev sib haum xeeb nyob sab Europe. Nws muaj ob qhov tseem ceeb: Ntu 1 suav nrog kev xa khoom (qib hlau, tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab), thaum Ntu 2 meticulously txhaiskam rau ua, qhov ntev, thiab cov khoom seemrau kev suav tsim. Kev ua raws li EN 10219 yog qhov tseem ceeb rau cov haujlwm ua raws li Eurocode tsim qauv.
Qhov tseem ceeb sib piv
Cov lus hauv qab no qhia txog qhov sib txawv tseem ceeb ntawm ob tus qauv, uas qhia kev xaiv cov khoom siv.
| Feature | ASTM A500 1 | TS EN 10219 |
|---|---|---|
| Thawj Scope | Cov hom phiaj dav dav (lub tsev, txuas hniav). | Kev siv cov qauv hauv Eurocode system. Xws li cov kev qhia tshwj xeeb rau qhov xav tau ib puag ncig xws li cov qauv hauv ntug dej hiav txwv los ntawm cov qauv muaj feem xyuam (xws li EN 10225). |
| Qib steel & Lub zog | Qib A, B, C, D raws li qhov tsawg kawg nkaus yield zog (xws li ntawm 39 txog 70 ksi). Qib D xav tau kev kho cua sov. | Qib raws li cov khoom muaj zog (piv txwv li, S235, S355) thiab toughness (piv txwv li, J2, K2, ML). Piv txwv:S355J2Hyog ib qib uas lav qhov tsawg kawg nkaus toughness. |
| Notch Toughness (Impact Resistance) | Tsis tas yuav tsum tau ua.Cov txheej txheem suav nrog cov lus ceeb toom uas cov khoom yuav tsis haum rau cov khoom siv dynamically loaded qhov twg tsawg -kub toughness yog ib qho tseem ceeb. | Qhia meej meej.Qib zoo li S355J2H lav qhov tsawg kawg nkaus Charpy V-Notch (CVN) cuam tshuam lub zog (piv txwv li, 27 Joules ntawm -20℃). |
| Dimensional Tolerances | Tolerances yog txhais, feem ntau raws li ib tug yooj yim feem pua los yog kiag li tus nqi. Piv txwv li, phab ntsa thickness kam rau ua yog feem ntau ± 10%. | Kev kam rau siab yog cov ncauj lus kom ntxaws hauv EN 10219-2, sib txawv nrog qhov loj thiab tuab. Lawv feem ntaustricter rau tej yam tsis, tshwj xeeb tshaj yog rau cov ntu loj thiab cov phab ntsa tuab. |
| Sectional Properties | Feem ntau suav nrog nominal qhov ntev. | EN 10219-2 muab cov qauv tso cai hauv nws cov khoom ntxiv los xam cov khoom seem (xws li lub sijhawm ntawm inertia)raws li cov kev txwv uas tau teev tseg, kom ntseeg tau tias tsim qauv. |
| Yam khoom | Npog cov voj voog thiab cov duab nrog ib puag ncig Tsawg dua lossis sib npaug ntawm 88 hauv. | Npog ntau qhov dav: cov ntu ncig mus txog 2500 mm OD, square mus txog 500x500 mm, duab plaub txog li 500x300 mm, nrog phab ntsa tuab txog 40 mm. |
Ua Kev Xaiv Zoo: Daim Ntawv Thov -Raws Li Kev Qhia
Xaiv ASTM A500 rau:
Static Load Structures:Cov kab ke hauv tsev, cov tsev khaws khoom, thiab cov qauv kev txhawb nqa hauv cov cheeb tsam uas tsis yog - seismic nrog cov khoom zoo li qub.
North American Projects:Qhov twg hauv zos cov cai hauv tsev thiab kev ua haujlwm engineering yog raws li AISC cov lus qhia uas siv ASTM A500.
Tus nqi - Cov Haujlwm Tseem Ceeb:Qhov twg qhov tseeb toughness guarantees ntawm EN 10219 tsis yog ib txoj cai yuav tsum tau, muaj peev xwm muab ib tug ntau economic kev daws teeb meem.
Xaiv EN 10219 rau:
Dynamic lossis Cyclic Loading:Cov qauv yuav ua rau qaug zog, cua, seismic kev ua si, los yog crane khiav. Lub guaranteed toughness yog qhov tseem ceeb ntawm kev nyab xeeb.
Tsawg- Ib puag ncig kub:Offshore platforms (raws li tau hais hauv EN 10225-4), txuas hniav hauv cov huab cua txias, lossis ib qho qauv uas qhov kev pabcuam kub tuaj yeem poob qis.
European thiab International Projects:Qhov twg tsim raws li Eurocodes, ua rau EN 10219 ua raws li kev xaiv thiab kev xaiv.
High -Precision Fabrication:Tej yaam num uas stricter dimension tolerances muaj txiaj ntsim rau complex pob qij txha los yog aesthetic exposed steelwork.
Cov lus nug nquag nug (Q&A)
Q1: Kuv puas tuaj yeem hloov ASTM A500 Qib B raj nrog EN 10219 S355J2H raj?
Thaum lawv qhov tsawg kawg nkaus tawm los muaj zog zoo sib xws (A500 Qib B: 46 ksi / ~ 317 MPa; S355J2H: 355 MPa), lawv tsis tuaj yeem sib npaug. Cov khoom lag luam EN 10219 muaj cov ntaub ntawv pov thawj tsis zoo, uas cov khoom ASTM yuav tsis muaj. Kev hloov pauv tsuas yog ua tau yog tias tus qauv tsim qauv lees paub tias qhov kev cuam tshuam tsis zoo tsis yog qhov tsim nyog rau cov khoom tshwj xeeb. Qhov kev txiav txim siab yuav tsum tsis txhob ua raws li lub zog tawm los ib leeg.
Q2: Tus qauv twg muaj kev tiv thaiv corrosion zoo dua?
Tsis yog tus qauv tshwj xeeb hais txog kev tiv thaiv corrosion los ntawm alloying. Ob leeg npog carbon steel. Kev tiv thaiv corrosion (los ntawm galvanizing, pleev xim, los yog siv cov huab cua steel) yog ib qho kev qhia tshwj xeeb ntawm cov raj tsim qauv.
Q3: Peb tab tom sib tw rau ib qhov project hauv Middle East nrog tus kws pab tswv yim European. Yam qauv twg peb yuav tsum hais?
Koj yuav tsum tau hais tawm cov khoom lag luam ua raws liTS EN 10219, tshwj xeeb nrog rau qib toughness (xws li S355J2H). Cov kws pab tswv yim European yuav tsim qauv raws li Eurocodes, uas tau koom ua ke nrog EN 10219 tus qauv rau cov khoom seem thiab cov khoom siv tshwj xeeb. Kev muab ASTM A500 tuaj yeem ua rau muaj teeb meem kev ua raws cai lossis xav tau kev tsim nyog ntxiv.
Q4: Yuav ua li cas txog qhov loj lossis tuab dua li cov qauv ntawm cov qauv no?
Rau cov ntawv thov uas xav tau cov phab ntsa thickness ntau dua 40 mm lossis diameters siab dua 2500 mm, lwm yam khoom siv yog feem ntau siv. Cov no suav nrogkub-Tiav seem hollow (EN 10210 / ASTM A1085), uas muaj cov khoom sib txawv thiab microstructures, los yog fabricated phaj seem. Kub- cov seem tiav kuj feem ntau lees paub tias muaj qhov zoo ntawm qhov tsis zoo ntawm lub cev.
Xaus
Kev xaiv ntawm ASTM A500 thiab EN 10219 tsis yog qhov kev nyiam rau tus qauv Asmeskas lossis European; nws yog ib qho kev txiav txim siab uas muaj feem cuam tshuam rau kev ua haujlwm ncaj ncees.ASTM A500 1ua hauj lwm raws li ib tug robust, kev ua tau zoo-raws li tus qauv rau ib tug dav array ntawm cov qauv. Piv txwv li,TS EN 10219muab lub moj khaum ntau dua thiab muaj kev qhia dav dav, nrog rau kev tsim- hauv kev tiv thaiv rau qhov hnyav uas ua rau nws yog qhov kev xaiv tiag tiag rau qhov tseem ceeb, muaj zog, lossis hnyav- kev siv ib puag ncig thoob ntiaj teb.
PebLEFIN STEELRaws li cov chaw tsim khoom lag luam muaj peev xwm ua tau zoo hauv ob qho qauv, peb tau muab tso rau coj koj los ntawm txoj kev xaiv no. Los ntawm kev ua raws li koj qhov project thaj chaw, kev tswj hwm, thiab kev ua haujlwm raws li tus qauv tsim nyog, peb xyuas kom koj tau txais cov khoom lag luam uas xa tsis yog ntawm cov lus qhia tshwj xeeb, tab sis ntawm kev nyab xeeb thiab kev ua haujlwm ntev.
