DIN EN 25817Arc-welded pob qij txha hauv cov hlau; kev taw qhia txog theem zoo rau kev ua tsis tiav (ISO 5817: 1992), Los ntawm cov qib ntsuas rau cov txheej txheem rau cov neeg sab nraud thiab sab hauv peb qib theem zoo rau fusion welded pob qij txha thiab cov pob txha sib xyaw hauv cov hlau tau muab tso cia. Theem ua tau zoo siv rau cov haujlwm workpiece tuab ntawm 3 txog 63 hli thiab nrog qhov ntawd rau kev cob qhia ua haujlwm thiab txais kev lees paub tus txheej txheem yog nqa tawm xa mus rau qib ntawm zoo tag nrho lossis tsis tiav.
ThisISO 5817International Standard muab cov qib tsis zoo ntawm kev tsis sib haum hauv fusion-welded pob qij txha (tshwj tsis yog nqaj hlau vuam) rau txhua hom hlau, nickel, titanium thiab lawv cov alloys. Nws siv rau cov khoom tuab ≥ 0,5 hli. Nws npog tag nrho nkag taub qab welds thiab tag nrho cov fillet welds. Nws lub hauv paus ntsiab lus tseem tuaj yeem thov rau ib nrab-nkag mus rau lub pob tw hlau txuas.
(Theem qib zoo rau nqaj welded pob qij txha hauv cov hlau tau nthuav tawm hauv ISO 13919-1.)
Qeb peb qib tau muab rau hauv kom tso cai rau siv rau ntau qhov ntawm welded fabrication. Lawv tau tsim los ntawm cov cim B, C thiab D. Kev ua tau zoo qib B ua tau raws li qhov xav tau siab tshaj plaws ntawm kev ua tiav txuas.
Ob peb hom kev thauj khoom yog txiav txim siab, piv txwv li lub nra zoo li qub thauj khoom, thauj khoom cua sov, tiv thaiv corrosion, siab siab ntsaws. Cov lus qhia ntxiv txog cov nra hnyav tau muab rau hauv Annex C.
Cov theem zoo tau hais txog kev tsim khoom thiab kev ua haujlwm zoo.
Tus qauv International no siv tau rau
a) non-alloy thiab alloy hlau,
b) npib tsib xee thiab nyiaj npib tsib xee alloys,
c) titanium thiab titanium alloys,
d) phau ntawv, siv tshuab thiab tsis siv neeg vuam,
e) txhua txoj haujlwm vuam,
f) txhua hom welds, piv txwv li taub qab welds, fillet welds thiab ceg sib txuas, thiabg) cov txheej txheem vuam txuas mus ntxiv thiab lawv cov txheej txheem ncua, raws li txhais hauv ISO 4063:
- 11 hlau-arc vuam tsis muaj kev tiv thaiv roj;
- 12 qhov dej hauv qab-arc vuam;
- 13 daim hlau thaiv cov roj-arc vuam;
- 14 roj av tiv thaiv arc vuam nrog qhov tsis siv hluav taws xob tungsten electrodes;
- 15 ntshav arc vuam;
- 31 tshuab siv roj ua hluav taws xob-roj pa (rau cov hlau xwb).
Nws yog xim hlau ntxaws ntxaws, piv txwv li qhov loj me, qhov nyuaj, tsis duav los ntawm International Standard.
