Wetin na fɔ it gred stenlɛs stiɛl?
Food gred stenlɛs stiɛl de in layn wit di 'Pipul dɛn Ripɔblik fɔ Chaina Nashɔnal Stɛndad GB9684' stenlɛs stiɛl matirial. Di tin dɛn we de insay di lid kromiɔm smɔl pas di wan we ɔdinari staynl dɛn stɛl gɛt.
Indikɛtɔ dɛn se: Fɔd gred stenlɛs stiɛl de tɔk bɔt di pat we de kɔntakt wit it it mashin, ɛn di it fɔ mit sɔm sefty rikwaymɛnt dɛn. Bikɔs fɔ yuz bɔku fud asid prodakshɔn prɔses , kromiɔm stenlɛs stiɛl , unqualified stenlɛs stiɛl , go sɔlv difrɛn prayz dɛn fɔ kromiɔm , pɔyzin;ɛn rikwaymɛnt fɔ limit di kɔntinyu fɔ lid, kadmiɔm ɛn ɔda alɔy impyuriti ɛlimɛnt dɛn.
Di difrɛns bitwin fud gred stenlɛs stiɛl ɛn 304 stenlɛs stiɛl : di yus fɔ stenlɛs stiɛl prodakt dɛn ebi ebi mɛtal maykreshɔn mɔni pas di standad, kin ambɔg mɔtalman wɛlbɔdi. So, stenlɛs stiɛl kuk we dɛn de mek nid fɔ mek balans bitwin kɔrɛshɔn ɛn sef. When the nickel and chromium content is high, the corrosion resistance is enhanced, but the amount of nickel and chromium precipitates produced will also increase, which increases the safety risk.Because of this, 'Stainless Steel products' (GB9684-2011) national food safety standard , cookers chromium, cadmium, nickel, lead and heavy metal precipitation index has made strict provisions.
Wetin mek di Nashɔnal Stɛndad nɔ spɛsifa di maykreshɔn limit fɔ manganɛs?
Wan rizin na dat, wit di inkris we di manganɛs kɔntinyu fɔ de insay stenlɛs stiɛl , in kɔrɛshɔn rɛsistɛns ɛn rɔst rɛsistɛns sɛf de go ɔp. Wans di manganɛs kɔntinyu fɔ rich wan patikyula lɛvul, dɛn nɔ go ebul fɔ yuz di prɔdak as kuk ɔ stenlɛs stiɛl kuk. Bɔt ivin na dɛn kayn ay levul ya na manganɛs, bɔku tɛm, no wɛlbɔdi nɔ kin apin. So pan ɔl we di nashɔnal fud sefty standad dɛn nɔ de rigul manganɛs lɛvɛl, dɛn de spɛsifa se di men pat pan di fud we dɛn kin yuz fɔ mek tin dɛn fɔ it, dɛn fɔ mek am wit stenlɛs stiɛl we de akɔdin to di nashɔnal standad dɛn.
Spesifi k standad .
Ɔl kayn tin fɔ kip tin fɔ it ɛn mashin fɔ prosɛs it fɔ pik ɔstɛns ɔ fɛritik stenlɛs stiɛl (1CR18Ni9ti,0cr19Ni9, 1CR18Ni9, 1CR17Ni2). Fɔ di prɔsesin pat pan di grindin tul drilin tul kin pik bak Martensianite stenlɛs stiɛl (0CR13, 1CR13, 2CR13, 3CR13).
Speshal fizik ɛn kemikal indikɛtɔ dɛn na dɛn wan ya:
Item austenitic stenles stiel ferrit martensit stenles stiel
Lid (insay PB), Mg/L 4% asɛtik asid imɛshɔn sɔlshɔn ≤ 1.0 1.0.
Kromium (in CR), MG/L 4% asetik asid immersion solushɔn ≤ . 0.5
Nikel (insay Ni), Mg/L 4% asɛtik asid sok sɔlshɔn ≤ 3.0 1.0.
Kadmiɔm (insay CD), Mg/L 4% asɛtik asid sɔlshɔn ≤ 0.02 0.02.
Asɛnik (AS), Mg/L 4% asɛtik asid sɔlshɔn ≤ 0.04 0.04.
Notis: Ɔl di soak kɔndishɔn dɛn de bɔyl fɔ 30min ɛn afta dat rum tɛmpracha fɔ 24h.
Fɔd gred stenlɛs stiɛl . Welded pipe gɛt bɔku bɔku aplikeshɔn dɛn, insay ɛn ausayd di dimand. stenles stiel welded pipe welding tritment na rili ki, 0.5mm kin achy di effekt f internal casting tu.
If na fud gred stenlɛs stiɛl wɛld paip ɔnda nɔmal tin dɛn nid fɔ trowe insay ɛn na do, di sem tɛm nid fɔ . Weld grindin ɛn . Brayt Anilin . Di nid fɔ intanɛnt ɛn ɛksternal polish nɔ gɛt natin fɔ du wit di tik we de na di wɔl, na di aplikeshɔn sityueshɔn nɔmɔ. Di tik we di wɔl tik tu tin fɔ di intanɛnt kastin nɔto tu big prɔblɛm, bikɔs di ɛksternal kastin kin bi lɔw pas rɛt.
If na welded pipe , i nɔ impɔtant insay ɛn na do. Luk bak di dayamita fɔ yu tiub. Seamless tiub nɔ kin trowe insay. Yu nɔ go se di wɔl tik we na 0.5 tu tin. Bikɔs if yu gɛt 0.5 wɔl tik we na wan mita in dayamita, dɛn nɔ go disayd am, nɔto fɔ pres am flat. So i dipen pan di dayamita fɔ yu tiub.
Sɔntɛm yu paip tu lɔng, di tik tik tu tin, bikɔs insay ɛn ɔda polish na fɔ si di yus fɔ di sɛt, yu nɔ gɛt so ay rikwaymɛnt, nid nɔ de fɔ inkrisayz di kɔst dɛn we nɔ nid.
