AS 1579 steel yeeb nkabyog lub pob tw welded arc welded steel yeeb nkab tsuas yog siv rau kev thauj mus los ntawm cov dej thiab cov dej khib nyiab nrog rau sab nraud txoj kab uas hla ntawm ≥ 114 mm thiab rau cov yeeb nkab pawg nrog lub ntsuas siab tsis tshaj 6.8 MPa.
Cov yeeb nkab yeeb nkab yog cov tswv cuab ntawm cov txheej txheem ncig uas tau tsav mus rau hauv cov av thiab tsis siv rau kev tswj hwm sab hauv.
Qhov tsawg kawg nkaus sab nraud txoj kab uas hla yog 114 hli, txawm hais tias tsis muaj kev txwv tshwj xeeb ntawm qhov loj ntawm cov yeeb nkab, tab sis qhov ntau thiab tsawg yog muab.
Yuav tsum tau tsim los ntawm kev txheeb xyuas lossis cov qauv ntawm cov hlau kub kub ua raws li AS / NZS 1594 lossis AS / NZS 3678.
Nyob ntawm qhov kawg siv nws tseem categorized raws li hauv qab no:
Hydrostatically kuaj cov kav dejyuav tsum tau tsim los ntawm kev soj ntsuam lossis cov qauv ntawm cov hlau kub kub ua raws li AS / NZS 1594 lossis AS / NZS 3678.
Piles thiab tsis-hydrostatically kuaj cov yeeb nkabyuav tsum tau tsim los ntawm cov qauv qib steel ua raws li AS / NZS 1594 lossis AS / NZS 3678.
Xwb,pawgtej zaum yuav raug tsim los ntawm kev soj ntsuam qib ua raws li AS / NZS 1594., nyob rau hauv cov ntaub ntawv no cov hlau yuav tsum tau mechanically kuaj raws li AS 1391 kom pom tau hais tias nws ua tau raws li tensile yuav tsum tau teev los ntawm buyer.
AS 1579 steel yeeb nkab yog tsim los sivarc vuam.
Tag nrho cov welds yuav tsum tau nkag mus rau hauv lub pob tw welds.
Arc vuam siv lub tshav kub ntawm ib qho hluav taws xob arc los yaj cov ntaub ntawv hlau thiab tsim ib qho kev sib koom ua ke ntawm cov hlau los tsim cov qauv hlau txuas txuas ntxiv.
Cov txheej txheem kev siv arc vuam feem ntau yog SAW (Submerged Arc Vuam), tseem hu uaDSAW, uas tuaj yeem categorized rau hauvLSAW(SAWL) thiab SSAW (HSAW) raws li cov kev taw qhia ntawm lub pob tw weld.
Ntxiv rau SAW, muaj lwm hom arc vuam xws li GMAW, GTAW, FCAW, thiab SMAW.Ntau yam arc vuam cov tswv yim muaj lawv tus kheej cov yam ntxwv thiab daim ntawv thov scenarios, thiab kev xaiv ntawm qhov tsim nyog vuam txoj kev nyob ntawm cov specifications ntawm cov yeeb nkab steel yuav tsum tau tsim, cov peev nyiaj, thiab cov kev cai zoo.
Cov qauv lawv tus kheej tsis ncaj qha qhia cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab, vim qhov no feem ntau yog nyob ntawm cov qauv hlau tshwj xeeb xws li AS / NZS 1594 lossis AS / NZS 3678, uas qhia meej txog cov khoom siv tshuaj thiab khoom siv ntawm cov hlau siv los ua cov no. cov raj.
AS 1579 qhia tsuas yog cov pa roj carbon sib npaug.
Cov pa roj carbon sib npaug (CE) ntawm cov hlau yuav tsum tsis pub tshaj 0.40.
CE=Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
CE yog ib qho tseem ceeb parameter siv los ntsuas qhov weldability ntawm steel.Nws pab kwv yees qhov hardening uas yuav tshwm sim hauv cov hlau tom qab vuam thiab yog li ntsuas nws cov weldability.
Kev ntsuas hydrostatic siab yuav tsum tau siv rau txhua qhov dej lossis cov dej khib nyiab steel siv rau kev thauj mus los.
Cov kab yeeb nkab feem ntau tsis tas yuav tsum tau kuaj hydrostatically vim tias lawv feem ntau yog siv los nqa cov khoom thauj ntau dua li cov kev kub ntxhov sab hauv.
Kev sim cov ntsiab lus
Cov yeeb nkab yog kaw ntawm txhua qhov kawg thiab yog pressurized hydrostatically.
Nws raug tshuaj xyuas rau lub zog ntawm lub siab uas sawv cev rau qhov tsim lub siab ntawm cov yeeb nkab.Nws raug soj ntsuam rau cov xau nruj ntawm qhov ntsuas siab ntawm cov yeeb nkab.
Kev sim siab
Qhov siab tshaj plaws ntsuas siab ntawm cov yeeb nkab steel yog 6.8 MPa.Qhov siab tshaj plaws no tau hais los ntawm cov cuab yeej ntsuas siab ntawm 8.5 MPa.
Pr= 0.72 × (2 × SMYS × t) / OD los yog Pr= 0.72 × (2 × NMYS × t) / OD
Pr: Rated siab, hauv MPa;
SMYS: Qhia tawm yam tsawg kawg nkaus lub zog, hauv MPa;
NMYS: Nominal yam tsawg kawg nkaus tawm lub zog, hauv MPa;
t: Phab ntsa thickness, hauv mm;
OD: Sab nraud txoj kab uas hla, mm.
Thaum muaj xwm txheej ceev, kev ntxhov siab nyob ib puag ncig yuav ua rau muaj kev ntxhov siab hauv cov yeeb nkab.Raws li cov xwm txheej no, qhov siab tshaj plaws tso cai ua ke yuav tsum txiav txim siab los ntawm tus tsim qauv, tab sis yuav tsum tsis pub tshaj 0.90 x SMYS.
Pt= 1.25 TZSr
Tom qab kuaj lub zog, yuav tsum tsis muaj qhov tawg lossis tawg hauv cov yeeb nkab kuaj.
90% ntawm qhov tsawg kawg nkaus yield zog (SMYS) los yog nominal yam tsawg yield zog (NMYS) los yog 8.5 MPa, qhov twg yog tsawg dua.
Pl=Pr
Kev ntsuam xyuas dej yuav tsum tau ua rau ntawm cov yeeb nkab.
Thaum kuaj cov dej xau, yuav tsum tsis muaj qhov pom ntawm cov yeeb nkab nto.
Tag nrho cov kav dej uas tsis yog-hydrostatic yuav tsum muaj phab ntsa thickness tsis pub tsawg tshaj 8.0 hli.
Lub cevyuav tsum muaj 100% ntawm nws cov welds uas tsis yog-destructively kuaj los ntawm ultrasonic los yog radiographic txoj kev raws li AS 1554.1 Qeb SP thiab ua raws li cov kev cai txais.
Kev sim tsis muaj kev puas tsuaj ntawm ib feem pawg weldsrau piles.Cov txiaj ntsig kev xeem yuav tsum ua raws li AS / NZS 1554.1 Chav Kawm SP cov cai.Yog tias qhov kev tshuaj xyuas pom tias tsis ua raws li daim ntawv lo, tag nrho cov vuam ntawm cov yeeb nkab yuav raug tshuaj xyuas.
Cov kav dej thiab fittings siv rau kev xa dej thiab cov dej phwj tuaj yuav tsum tau tiv thaiv los ntawm kev xeb los ntawm kev xaiv cov txheej tsim nyog Cov txheej yuav tsum tau siv raws li AS 1281 thiab AS 4321.
Nyob rau hauv cov ntaub ntawv ntawm cov dej haus, lawv yuav tsum ua raws li AS / NZS 4020. Lub hom phiaj yog los xyuas kom meej tias cov khoom no, thaum nyob rau hauv kev sib cuag nrog cov dej system, tsis txhob cuam tshuam rau qhov zoo ntawm cov dej, xws li tshuaj lom neeg, microbiological. kev kis kab mob, los yog hloov qhov saj thiab qhov tsos ntawm cov dej.
Sab nrauv ntawm lub raj, tsis pub ntau tshaj 150 hli los ntawm qhov kawg, yuav tsum tau ua kom pom tseeb thiab ruaj khov nrog cov ntaub ntawv hauv qab no:
a) Tus lej cim tshwj xeeb, piv txwv li tube tooj;
b) Qhov chaw tsim khoom;
c) Sab nraud txoj kab uas hla thiab phab ntsa thickness;
d) Tus lej qauv, piv txwv li AS 1579;
e) Chaw tsim khoom lub npe lossis lub cim lag luam;
f) Hydrostatic test yeeb nkab siab ntsuas (tsuas yog rau cov yeeb nkab steel raug kuaj hydrostatic);
g) Cov cim ntsuas tsis muaj kev puas tsuaj (NDT) (tsuas yog rau cov yeeb nkab steel uas tau dhau los ua qhov tsis muaj kev puas tsuaj).
Cov chaw tsim khoom yuav tsum muab tus neeg yuav khoom nrog daim ntawv pov thawj kos npe uas hais tias cov yeeb nkab tau raug tsim tawm raws li qhov yuav tsum tau ua ntawm Tus Neeg yuav khoom thiab tus qauv no.
ASTM A252, ASTM A252: Tsim los rau cov yeeb nkab steel thiab muaj cov ncauj lus kom ntxaws cov khoom siv thiab cov tshuaj lom neeg muaj pes tsawg leeg rau peb chav kawm ua haujlwm.
TS EN 10219: muaj feem xyuam rau txias-tsim welded structural steel raj rau cov qauv siv nrog rau cov yeeb nkab piles.
TS EN ISO 3183: Steel kab yeeb nkab rau kev lag luam roj thiab roj, nrog rau kev ua tau zoo thiab lub zog uas ua rau nws kuj tsim nyog rau nqa cov yeeb nkab.
API 5L: Feem ntau yog siv rau kev thauj mus los hauv cov kav dej hauv kev lag luam roj thiab roj, cov qauv zoo kuj ua rau nws tsim nyog rau kev ua cov pawg uas muaj cov khoom siv siab.
CSA Z245.1: Qhia tshwj xeeb rau cov kav dej steel thiab fittings rau kev thauj mus los ntawm cov roj thiab cov pa roj, uas kuj tsim nyog rau cov yeeb nkab piles.
ASTM A690 Cov Lus Qhia Tshwj Xeeb: Tsim los rau cov yeeb nkab steel siv nyob rau hauv marine thiab ib puag ncig zoo sib xws, hais txog kev tiv thaiv corrosion.
TIAB SA 5525: Japanese txheem npog steel yeeb nkab rau cov yeeb nkab piles, nrog rau cov khoom siv, fabrication, seem thiab kev ua tau zoo.
GOST 10704-91: Hluav taws xob welded ncaj seam steel yeeb nkab rau siv nyob rau hauv lub tsev thiab engineering lug, nrog rau cov yeeb nkab piles.
GOST 20295-85: Cov ntsiab lus ntawm cov khoom siv hluav taws xob welded steel kav rau kev thauj mus los ntawm cov roj thiab roj, qhia lawv cov kev ua tau zoo nyob rau hauv kev kub siab thiab nyob rau hauv ib puag ncig hnyav, muaj feem xyuam rau cov yeeb nkab piles.
Txij li thaum nws tsim nyob rau hauv 2014, Botop Steel tau dhau los ua tus xa khoom ntawm carbon steel yeeb nkab nyob rau sab qaum teb Tuam Tshoj, paub txog kev pabcuam zoo, cov khoom zoo, thiab cov kev daws teeb meem.
Lub tuam txhab muaj ntau yam carbon steel kav thiab lwm yam khoom, xws li seamless, ERW, LSAW, thiab SSAW steel yeeb nkab, raws li zoo raws li ib tug tag nrho lineup ntawm cov yeeb nkab fittings thiab flanges.
Nws cov khoom tshwj xeeb kuj suav nrog cov qib high-qib alloys thiab austenitic stainless hlau, tsim kom tau raws li qhov xav tau ntawm ntau yam kev siv kav dej.
