{"id":47549,"date":"2026-08-06T12:39:15","date_gmt":"2026-08-06T09:39:15","guid":{"rendered":"https:\/\/steeling.net\/genel\/steel-grades-for-hvac-systems-specifications-tolerances-and-supplier-checklist\/"},"modified":"2026-08-06T17:42:03","modified_gmt":"2026-08-06T14:42:03","slug":"steel-grades-for-hvac-systems-specifications-tolerances-and-supplier-checklist","status":"publish","type":"post","link":"https:\/\/steeling.net\/cs\/uncategorized-cs\/steel-grades-for-hvac-systems-specifications-tolerances-and-supplier-checklist\/","title":{"rendered":"Ocelov\u00e9 jakosti pro syst\u00e9my HVAC: Specifikace, tolerance a kontroln\u00ed seznam dodavatel\u016f"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"47549\" class=\"elementor elementor-47549 elementor-47522\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-15cd8a29 e-flex e-con-boxed e-con e-parent\" data-id=\"15cd8a29\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-17621faa elementor-widget elementor-widget-text-editor\" data-id=\"17621faa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1 class=\"wp-block-heading\">Ocelov\u00e9 jakosti pro syst\u00e9my HVAC: Specifikace, tolerance a kontroln\u00ed seznam pro dodavatele<\/h1><p><style>\n  @import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@400;600&display=swap');<br \/>\n  .sn-blog { font-family: 'Roboto', sans-serif; color: #54595F; line-height: 1.75; max-width: 820px; }<br \/>\n  .sn-blog h2 { font-size: 22px; font-weight: 600; color: #000; margin: 44px 0 14px; border-left: 4px solid #61CE70; padding-left: 14px; }<br \/>\n  .sn-blog h3 { font-size: 17px; font-weight: 600; color: #000; margin: 26px 0 10px; }<br \/>\n  .sn-blog p  { font-size: 15px; margin: 0 0 16px; }<br \/>\n  .sn-blog .lead { font-size: 17px; color: #54595F; margin-bottom: 28px; }<br \/>\n  .sn-blog .meta-line { font-size: 13px; color: #7A7A7A; margin: 0 0 32px; }<br \/>\n  .sn-blog .stat-box { background: #f4fef6; border-left: 4px solid #61CE70; padding: 14px 18px; margin: 22px 0 28px; border-radius: 4px; font-size: 14px; line-height: 1.6; }<br \/>\n  .sn-blog .stat-box strong { color: #000; }<br \/>\n  .sn-blog .note-box { background: #f5f5f5; border-left: 4px solid #54595F; padding: 14px 18px; margin: 22px 0 28px; border-radius: 4px; font-size: 14px; line-height: 1.6; }<br \/>\n  .sn-blog .note-box strong { color: #000; }<br \/>\n  .sn-blog table { width: 100%; 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background: #61CE70; color: #000; font-weight: 600; padding: 12px 30px; border-radius: 3px; text-decoration: none; font-size: 14px; }<br \/>\n  .sn-blog a { color: #0020FF; }<br \/>\n<\/style><\/p><div class=\"sn-blog\"><p class=\"meta-line\">Publikov\u00e1no srpen 2026 \u00b7 9 min \u010dten\u00ed \u00b7 Pr\u016fvodce materi\u00e1ly \u00b7 HVAC<\/p><p class=\"lead\">Ocel je specifikov\u00e1na v t\u00e9m\u011b\u0159 ka\u017ed\u00e9m syst\u00e9mu HVAC, kter\u00fd se dnes vyr\u00e1b\u00ed \u2013 od potrub\u00ed vedouc\u00edho klimatizovan\u00fd vzduch a\u017e po konstruk\u010dn\u00ed r\u00e1m dr\u017e\u00edc\u00ed vzduchotechnickou jednotku na m\u00edst\u011b. Specifikace \u201eoceli\u201c bez definov\u00e1n\u00ed jakosti, tlou\u0161\u0165ky, povrchov\u00e9 \u00fapravy a tolerance v\u0161ak otev\u00edr\u00e1 prostor pro n\u00e1kladn\u00e9 z\u00e1m\u011bny, ne\u00fasp\u011b\u0161n\u00e9 kontroly a nedostate\u010dn\u00fd v\u00fdkon v praxi. Tento pr\u016fvodce pokr\u00fdv\u00e1 jakosti, tolerance a krit\u00e9ria pro dodavatele, kter\u00e1 in\u017een\u00fd\u0159i HVAC a n\u00e1kupn\u00ed t\u00fdmy pot\u0159ebuj\u00ed spr\u00e1vn\u011b nastavit ji\u017e od prvn\u00ed objedn\u00e1vky.<\/p><p><\/p><p>Ocel pro aplikace HVAC zahrnuje \u0161est hlavn\u00edch kategori\u00ed materi\u00e1l\u016f: \u017e\u00e1rov\u011b pozinkovan\u00fd plech (pro potrub\u00ed a opl\u00e1\u0161t\u011bn\u00ed), p\u0159edlakovan\u00fd pozinkovan\u00fd plech (pro hotov\u00e9 panely), plech z nerezov\u00e9 oceli (pro hygienick\u00e9 a korozivn\u00ed prost\u0159ed\u00ed), hlin\u00edkov\u00fd plech a svitky (pro v\u00fdm\u011bn\u00edky tepla a lehk\u00e9 potrub\u00ed), konstruk\u010dn\u00ed profily z uhl\u00edkov\u00e9 oceli (pro r\u00e1my a podp\u011bry za\u0159\u00edzen\u00ed) a trubky z uhl\u00edkov\u00e9 oceli (pro chladic\u00ed potrub\u00ed a konstruk\u010dn\u00ed spoje). Ka\u017ed\u00e1 aplikace m\u00e1 odli\u0161n\u00e9 po\u017eadavky na jakost, tlou\u0161\u0165ku, hmotnost povlaku a tolerance, kter\u00e9 mus\u00ed b\u00fdt p\u0159ed objedn\u00e1n\u00edm potvrzeny.<\/p><div class=\"stat-box\"><strong>Kontext odv\u011btv\u00ed:<\/strong> Glob\u00e1ln\u00ed trh HVAC by m\u011bl podle odhad\u016f vzr\u016fst z 240 miliard USD v roce 2024 na 367 miliard USD do roku 2030, a to d\u00edky legislativ\u011b v oblasti energetick\u00e9 \u00fa\u010dinnosti, urbanizaci a rostouc\u00ed popt\u00e1vce po chlazen\u00ed v Asii a na Bl\u00edzk\u00e9m v\u00fdchod\u011b (Grand View Research, 2024). Ocel a hlin\u00edk tvo\u0159\u00ed nejv\u011bt\u0161\u00ed pod\u00edl materi\u00e1lov\u00fdch n\u00e1klad\u016f HVAC u v\u011bt\u0161iny vyr\u00e1b\u011bn\u00fdch syst\u00e9m\u016f, co\u017e \u010din\u00ed specifikaci jakosti a efektivitu n\u00e1kupu p\u0159\u00edmou p\u00e1kou na mar\u017ei produktu a v\u00fdkonnost dod\u00e1vek.<\/div><p><\/p><h2>Aplikace HVAC a ocel, kterou vy\u017eaduj\u00ed<\/h2><p><\/p><p>R\u016fzn\u00e9 komponenty HVAC kladou na ocel r\u016fzn\u00e9 n\u00e1roky \u2013 potrub\u00ed vy\u017eaduje tv\u00e1rnost a odolnost proti korozi v tenk\u00fdch tlou\u0161\u0165k\u00e1ch; konstruk\u010dn\u00ed r\u00e1my pot\u0159ebuj\u00ed mez kluzu a sva\u0159itelnost u siln\u011bj\u0161\u00edch profil\u016f; lamely v\u00fdm\u011bn\u00edk\u016f tepla vy\u017eaduj\u00ed tepelnou vodivost a konzistenci tenk\u00fdch tlou\u0161t\u011bk; hygienick\u00e9 a farmaceutick\u00e9 syst\u00e9my HVAC vy\u017eaduj\u00ed hladk\u00e9, \u010distiteln\u00e9 nerezov\u00e9 povrchy. Specifikace jedin\u00e9 \u201estandardn\u00ed\u201c oceli pro v\u0161echny aplikace vede k p\u0159edimenzov\u00e1n\u00ed v n\u011bkter\u00fdch oblastech a nedostate\u010dn\u00e9mu v\u00fdkonu v jin\u00fdch.<\/p><div class=\"app-grid\"><div class=\"app-card\"><h4>Potrub\u00ed a rozvod vzduchu<\/h4><p>\u017d\u00e1rov\u011b pozinkovan\u00fd plech DX51D nebo DX52D, 0,5\u20131,2 mm. EN 10346. T\u0159\u00edda povlaku minim\u00e1ln\u011b Z275 pro standardn\u00ed instalace; Z350 pro prost\u0159ed\u00ed s vysokou vlhkost\u00ed nebo pob\u0159e\u017en\u00ed oblasti.<\/p><\/div><div class=\"app-card\"><h4>Opl\u00e1\u0161t\u011bn\u00ed a panely VZT jednotek<\/h4><p>P\u0159edlakovan\u00fd pozinkovan\u00fd plech (PPGI) 0,6\u20131,0 mm pro vn\u011bj\u0161\u00ed panely. Nelakovan\u00fd pozinkovan\u00fd nebo nerezov\u00fd plech pro vnit\u0159n\u00ed povrchy. Tolerance rovinnosti je kritick\u00e1 pro integritu t\u011bsn\u011bn\u00ed.<\/p><\/div><div class=\"app-card\"><h4>Hygienick\u00e9 a \u010dist\u00e9 prostory HVAC<\/h4><p>Nerezov\u00fd plech AISI 304 (1.4301) nebo AISI 316 (1.4401), 1,0\u20132,0 mm. Povrchov\u00e1 \u00faprava 2B nebo BA. Svarov\u00e9 \u0161vy vybrou\u0161en\u00e9 dohladka. Vy\u017eadov\u00e1no pro farmaceutick\u00e9, potravin\u00e1\u0159sk\u00e9 a chirurgick\u00e9 prost\u0159ed\u00ed.<\/p><\/div><div class=\"app-card\"><h4>V\u00fdm\u011bn\u00edky tepla<\/h4><p>Hlin\u00edkov\u00fd svitek slitina 1050 nebo 3003, 0,08\u20130,15 mm pro lamely. M\u011bd\u011bn\u00e1 nebo hlin\u00edkov\u00e1 trubka. Konzistentn\u00ed tolerance tlou\u0161\u0165ky (\u00b10,005 mm) je kritick\u00e1 pro v\u00fdt\u011b\u017enost p\u0159i lisov\u00e1n\u00ed lamel.<\/p><\/div><div class=\"app-card\"><h4>R\u00e1my a podp\u011bry za\u0159\u00edzen\u00ed<\/h4><p>Konstruk\u010dn\u00ed ocel S235 nebo S275 v\u00e1lcovan\u00e1 za tepla, \u00faheln\u00edky a ploch\u00e1 ocel. Po v\u00fdrob\u011b \u017e\u00e1rov\u011b pozinkov\u00e1no pro venkovn\u00ed nebo st\u0159e\u0161n\u00ed instalace. EN 10025.<\/p><\/div><div class=\"app-card\"><h4>Chladic\u00ed a potrubn\u00ed rozvody<\/h4><p>Beze\u0161v\u00e9 nebo sva\u0159ovan\u00e9 trubky z uhl\u00edkov\u00e9 oceli EN 10216 \/ EN 10210. M\u011bd\u011bn\u00e9 trubky EN 12735 pro chladic\u00ed okruhy. Jmenovit\u00fd tlak mus\u00ed odpov\u00eddat n\u00e1vrhov\u00e9mu provozn\u00edmu tlaku syst\u00e9mu.<\/p><\/div><div class=\"app-card\"><h4>Kabelov\u00e9 \u017elaby a sk\u0159\u00edn\u011b<\/h4><p>Pozinkovan\u00fd ocelov\u00fd plech 1,0\u20132,0 mm, \u0159ezan\u00fd laserem a oh\u00fdban\u00fd na CNC. Elektrick\u00e9 sk\u0159\u00edn\u011b z pr\u00e1\u0161kov\u011b lakovan\u00e9 uhl\u00edkov\u00e9 oceli nebo nerezov\u00e9 oceli pro venkovn\u00ed\/korozivn\u00ed instalace.<\/p><\/div><div class=\"app-card\"><h4>V\u011btrac\u00ed m\u0159\u00ed\u017eky a \u017ealuzie<\/h4><p>Pozinkovan\u00fd nebo hlin\u00edkov\u00fd plech 0,8\u20131,5 mm, d\u011brovan\u00fd nebo lisovan\u00fd. Hlin\u00edk je preferov\u00e1n pro architektonick\u00e9 aplikace vy\u017eaduj\u00edc\u00ed eloxovan\u00fd nebo pr\u00e1\u0161kov\u011b lakovan\u00fd povrch.<\/p><\/div><\/div><p><\/p><h2>Ocelov\u00e9 jakosti pro HVAC: Referen\u010dn\u00ed specifikace<\/h2><p><\/p><p>Nej\u010dast\u011bji specifikovan\u00fdmi jakostmi oceli ve v\u00fdrob\u011b HVAC jsou pozinkovan\u00fd plech DX51D a DX52D pro potrub\u00ed, nerezov\u00e1 ocel AISI 304 a 316 pro hygienick\u00e9 aplikace, uhl\u00edkov\u00e1 ocel S235 a S275 pro konstruk\u010dn\u00ed prvky a trubky z uhl\u00edkov\u00e9 oceli EN 10216 pro tlakov\u00e9 potrub\u00ed. Ka\u017ed\u00e1 jakost je definov\u00e1na specifickou normou, minim\u00e1ln\u00edmi mechanick\u00fdmi vlastnostmi a \u2013 v p\u0159\u00edpad\u011b povrstven\u00fdch produkt\u016f \u2013 ozna\u010den\u00edm hmotnosti povlaku, kter\u00e9 ur\u010duje \u017eivotnost proti korozi v provozu.<\/p><table><thead><tr><th>Jakost<\/th><th>Norma<\/th><th>Pevnost v tahu<\/th><th>Rozsah tlou\u0161\u0165ky<\/th><th>Hlavn\u00ed pou\u017eit\u00ed v HVAC<\/th><\/tr><\/thead><tbody><tr><td>DX51D+Z<\/td><td>EN 10346<\/td><td>270\u2013500 MPa<\/td><td>0,4\u20133,0 mm<\/td><td>B\u011b\u017en\u00e9 potrub\u00ed, opl\u00e1\u0161t\u011bn\u00ed, panely<\/td><\/tr><tr><td>DX52D+Z<\/td><td>EN 10346<\/td><td>270\u2013420 MPa<\/td><td>0,4\u20132,0 mm<\/td><td>Tvarovky potrub\u00ed, hlubokota\u017en\u00e9 d\u00edly<\/td><\/tr><tr><td>DX53D+Z<\/td><td>EN 10346<\/td><td>270\u2013380 MPa<\/td><td>0,4\u20131,5 mm<\/td><td>Slo\u017eit\u00e9 v\u00fdlisky, panely s vysokou tv\u00e1rnost\u00ed<\/td><\/tr><tr><td>PPGI \/ DX51D+AZ<\/td><td>EN 10346 \/ EN 10169<\/td><td>270\u2013500 MPa<\/td><td>0,4\u20131,5 mm<\/td><td>P\u0159edlakovan\u00e9 vn\u011bj\u0161\u00ed panely a kryty VZT<\/td><\/tr><tr><td>AISI 304 (1.4301)<\/td><td>EN 10088-2<\/td><td>515\u2013720 MPa<\/td><td>0,5\u20136,0 mm<\/td><td>Hygienick\u00e9 potrub\u00ed, \u010dist\u00e9 prostory, potravin\u00e1\u0159stv\u00ed<\/td><\/tr><tr><td>AISI 316 (1.4401)<\/td><td>EN 10088-2<\/td><td>515\u2013690 MPa<\/td><td>0,5\u20136,0 mm<\/td><td>Farmaceutick\u00e9, pob\u0159e\u017en\u00ed, chemick\u00e9 provozy<\/td><\/tr><tr><td>S235JR<\/td><td>EN 10025-2<\/td><td>360\u2013510 MPa<\/td><td>3\u201380 mm<\/td><td>Lehk\u00e9 konstruk\u010dn\u00ed r\u00e1my, konzoly, podp\u011bry<\/td><\/tr><tr><td>S275JR<\/td><td>EN 10025-2<\/td><td>410\u2013560 MPa<\/td><td>3\u201380 mm<\/td><td>Konstruk\u010dn\u00ed r\u00e1my, z\u00e1kladny st\u0159e\u0161n\u00edch jednotek<\/td><\/tr><tr><td>S355JR<\/td><td>EN 10025-2<\/td><td>470\u2013630 MPa<\/td><td>3\u201380 mm<\/td><td>R\u00e1my t\u011b\u017ek\u00fdch za\u0159\u00edzen\u00ed, vysoce zat\u00ed\u017een\u00e9 konstrukce<\/td><\/tr><tr><td>P235GH \/ P265GH<\/td><td>EN 10216-2<\/td><td>360\u2013500 MPa<\/td><td>Vn\u011bj\u0161\u00ed pr\u016fm\u011br trubky se li\u0161\u00ed<\/td><td>Tlakov\u00e9 potrub\u00ed, p\u0159ipojen\u00ed kotl\u016f<\/td><\/tr><tr><td>Al 1050 \/ 3003<\/td><td>EN 573 \/ ASTM B209<\/td><td>75\u2013145 MPa<\/td><td>0,08\u20130,15 mm (lamela)<\/td><td>Lamely v\u00fdm\u011bn\u00edk\u016f tepla, lehk\u00e9 potrub\u00ed<\/td><\/tr><\/tbody><\/table><p><\/p><h2>T\u0159\u00eddy pozinkovan\u00e9ho povlaku: Kterou specifikovat?<\/h2><p><\/p><p>U pozinkovan\u00e9 oceli v aplikac\u00edch HVAC ur\u010duje t\u0159\u00edda hmotnosti povlaku \u017eivotnost proti korozi a mus\u00ed odpov\u00eddat prost\u0159ed\u00ed instalace. Ozna\u010den\u00ed \u201eZ275\u201c znamen\u00e1 275 gram\u016f zinku na metr \u010dtvere\u010dn\u00ed povrchu plechu (ob\u011b strany dohromady). Vy\u0161\u0161\u00ed hmotnost povlaku poskytuje del\u0161\u00ed \u017eivotnost proti korozi, ale sni\u017euje tv\u00e1rnost a zvy\u0161uje n\u00e1klady. Specifikace vy\u0161\u0161\u00ed t\u0159\u00eddy povlaku, ne\u017e vy\u017eaduje prost\u0159ed\u00ed instalace, p\u0159edstavuje zbyte\u010dn\u00e9 n\u00e1klady; poddimenzov\u00e1n\u00ed vede k p\u0159ed\u010dasn\u00e9 korozi a reklama\u010dn\u00edm n\u00e1rok\u016fm.<\/p><table><thead><tr><th>T\u0159\u00edda povlaku<\/th><th>Hmotnost zinku (g\/m\u00b2)<\/th><th>P\u0159ibl. venkovn\u00ed \u017eivotnost<\/th><th>Doporu\u010den\u00e9 prost\u0159ed\u00ed<\/th><\/tr><\/thead><tbody><tr><td>Z100<\/td><td>100 g\/m\u00b2<\/td><td>5\u201310 let<\/td><td>Pouze such\u00e9 vnit\u0159n\u00ed prostory \u2014 ne pro potrub\u00ed ve vlhk\u00fdch prostor\u00e1ch<\/td><\/tr><tr><td>Z200<\/td><td>200 g\/m\u00b2<\/td><td>10\u201320 let<\/td><td>Standardn\u00ed vnit\u0159n\u00ed HVAC, n\u00edzk\u00e1 vlhkost<\/td><\/tr><tr><td>Z275<\/td><td>275 g\/m\u00b2<\/td><td>15\u201325 let<\/td><td>Standardn\u00ed specifikace \u2014 v\u011bt\u0161ina aplikac\u00ed potrub\u00ed HVAC<\/td><\/tr><tr><td>Z350<\/td><td>350 g\/m\u00b2<\/td><td>20\u201330 let<\/td><td>Vysok\u00e1 vlhkost, pob\u0159e\u017en\u00ed nebo polovenkovn\u00ed instalace<\/td><\/tr><tr><td>Z450<\/td><td>450 g\/m\u00b2<\/td><td>25\u201340 let<\/td><td>Agresivn\u00ed prost\u0159ed\u00ed, offshore, pr\u016fmysl<\/td><\/tr><tr><td>AZ150 (Aluzinek)<\/td><td>150 g\/m\u00b2 slitina Al-Zn<\/td><td>Ekvivalentn\u00ed Z350+<\/td><td>Vysokoteplotn\u00ed aplikace, st\u0159e\u0161n\u00ed jednotky<\/td><\/tr><\/tbody><\/table><div class=\"note-box\"><strong>Praktick\u00e1 pozn\u00e1mka:<\/strong> Norma EN 10346 rovn\u011b\u017e umo\u017e\u0148uje ozna\u010den\u00ed povlak\u016f \u201eZF\u201c (slitina zinek-\u017eelezo) a \u201eZA\u201c (zinek-hlin\u00edk) pro specifick\u00e9 aplikace. Pro standardn\u00ed potrub\u00ed HVAC je Z275 nej\u010dast\u011bji uzn\u00e1vanou specifikac\u00ed mezi evropsk\u00fdmi dodavateli a je kompatibiln\u00ed se standardn\u00edmi syst\u00e9my spojov\u00e1n\u00ed, p\u0159\u00edrub a konektor\u016f. P\u0159ed objedn\u00e1n\u00edm v\u017edy potvr\u010fte t\u0159\u00eddu povlaku s projektantem syst\u00e9mu; nahrazen\u00ed ni\u017e\u0161\u00ed hmotnost\u00ed povlaku za \u00fa\u010delem sn\u00ed\u017een\u00ed n\u00e1klad\u016f je \u010dast\u00fdm zdrojem z\u00e1ru\u010dn\u00edch spor\u016f.<\/div><p><\/p><h2>Tolerance tlou\u0161\u0165ky a rovinnosti pro ocel HVAC<\/h2><p><\/p><p>Tolerance tlou\u0161\u0165ky a rovinnosti p\u0159\u00edmo ovliv\u0148uj\u00ed v\u00fdkon automatizovan\u00fdch linek na v\u00fdrobu potrub\u00ed HVAC. Svitky a plechy pod\u00e1van\u00e9 do plazmov\u00fdch stroj\u016f na tvarov\u00e1n\u00ed potrub\u00ed, stroj\u016f na v\u00fdrobu p\u0159\u00edrub TDC nebo CNC ohra\u0148ovac\u00edch lis\u016f mus\u00ed b\u00fdt v r\u00e1mci t\u011bsn\u00e9 tolerance tlou\u0161\u0165ky, aby byla zachov\u00e1na konzistentn\u00ed geometrie \u0161v\u016f a klasifikace vzduchot\u011bsnosti. Norma EN 10143 definuje standardn\u00ed tolerance tlou\u0161\u0165ky pro kontinu\u00e1ln\u011b \u017e\u00e1rov\u011b pozinkovan\u00fd ocelov\u00fd plech; v\u00fdrobci HVAC \u010dasto vy\u017eaduj\u00ed u velkoobjemov\u00fdch v\u00fdrobn\u00edch svitk\u016f p\u0159\u00edsn\u011bj\u0161\u00ed tolerance, ne\u017e jsou standardn\u00ed, aby se sn\u00ed\u017eily prostoje linek a m\u00edra zmetkovitosti.<\/p><table><thead><tr><th>Jmenovit\u00e1 tlou\u0161\u0165ka<\/th><th>Standardn\u00ed tolerance EN 10143<\/th><th>P\u0159\u00edsn\u00e1 tolerance (na vy\u017e\u00e1d\u00e1n\u00ed)<\/th><th>V\u00fdznam pro HVAC<\/th><\/tr><\/thead><tbody><tr><td>0,40\u20130,60 mm<\/td><td>\u00b10,05 mm<\/td><td>\u00b10,03 mm<\/td><td>Spir\u00e1lov\u00e9 potrub\u00ed, mal\u00e9 obd\u00e9ln\u00edkov\u00e9 potrub\u00ed<\/td><\/tr><tr><td>0,60\u20130,80 mm<\/td><td>\u00b10,06 mm<\/td><td>\u00b10,04 mm<\/td><td>Standardn\u00ed obd\u00e9ln\u00edkov\u00e9 potrub\u00ed<\/td><\/tr><tr><td>0,80\u20131,00 mm<\/td><td>\u00b10,07 mm<\/td><td>\u00b10,05 mm<\/td><td>T\u011b\u017ek\u00e9 potrub\u00ed, panely opl\u00e1\u0161t\u011bn\u00ed VZT<\/td><\/tr><tr><td>1,00\u20131,50 mm<\/td><td>\u00b10,09 mm<\/td><td>\u00b10,06 mm<\/td><td>Konstruk\u010dn\u00ed panely, kabelov\u00e9 \u017elaby, sk\u0159\u00edn\u011b<\/td><\/tr><tr><td>1,50\u20132,00 mm<\/td><td>\u00b10,11 mm<\/td><td>\u00b10,08 mm<\/td><td>R\u00e1mov\u00e9 komponenty, t\u011b\u017ek\u00e9 sk\u0159\u00edn\u011b<\/td><\/tr><tr><td>2,00\u20133,00 mm<\/td><td>\u00b10,13 mm<\/td><td>\u00b10,10 mm<\/td><td>Konstruk\u010dn\u00ed z\u00e1kladn\u00ed r\u00e1my, t\u011b\u017ek\u00e9 podp\u011bry<\/td><\/tr><\/tbody><\/table><p>Rovinnost (hodnota I-jednotky) je d\u016fle\u017eit\u00e1 pro laserem \u0159ezan\u00e9 polotovary panel\u016f a d\u00edly oh\u00fdban\u00e9 na ohra\u0148ovac\u00edm lisu. Pro materi\u00e1l pod\u00e1van\u00fd do automatizovan\u00fdch linek po\u017eadujte I \u2264 10 jednotek (rovinnost EN 10131 t\u0159\u00edda A). Standardn\u00ed rovinnost z v\u00e1lcovny (\u201ekomer\u010dn\u011b rovn\u00fd\u201c) je dosta\u010duj\u00edc\u00ed pro ru\u010dn\u011b manipulovan\u00fd plech, ale zp\u016fsob\u00ed probl\u00e9my s pod\u00e1v\u00e1n\u00edm na vysokorychlostn\u00edch link\u00e1ch.<\/p><p><\/p><h2>Certifikace a dokumentace k vy\u017e\u00e1d\u00e1n\u00ed<\/h2><p><\/p><p>Pro ocel pou\u017e\u00edvanou p\u0159i v\u00fdrob\u011b HVAC je minim\u00e1ln\u00edm po\u017eadavkem na dokumentaci atest 3.1 podle EN 10204 pokr\u00fdvaj\u00edc\u00ed chemick\u00e9 slo\u017een\u00ed a mechanick\u00e9 vlastnosti, vystaven\u00fd v\u00fdrobcem. U konstruk\u010dn\u00edch prvk\u016f ve stavebnictv\u00ed m\u016f\u017ee b\u00fdt v z\u00e1vislosti na aplikaci a jurisdikci vy\u017eadov\u00e1no ozna\u010den\u00ed CE podle EN 1090 (prov\u00e1d\u011bn\u00ed ocelov\u00fdch konstrukc\u00ed). Pro hygienick\u00e9 syst\u00e9my HVAC v potravin\u00e1\u0159sk\u00e9m, farmaceutick\u00e9m nebo l\u00e9ka\u0159sk\u00e9m prost\u0159ed\u00ed je pro \u00fa\u010dely auditu obvykle vy\u017eadov\u00e1na sledovatelnost materi\u00e1lu a\u017e ke konkr\u00e9tn\u00ed tavb\u011b nebo \u0161ar\u017ei.<\/p><table><thead><tr><th>Dokument<\/th><th>Co potvrzuje<\/th><th>Kdy je vy\u017eadov\u00e1n<\/th><\/tr><\/thead><tbody><tr><td>EN 10204 2.1<\/td><td>Shoda se specifikac\u00ed objedn\u00e1vky (bez zku\u0161ebn\u00edch dat)<\/td><td>Pouze n\u00edzkorizikov\u00e9, nekonstruk\u010dn\u00ed aplikace<\/td><\/tr><tr><td>EN 10204 3.1<\/td><td>Chemick\u00e9 slo\u017een\u00ed + v\u00fdsledky mechanick\u00fdch zkou\u0161ek od v\u00fdrobce<\/td><td>Standardn\u00ed po\u017eadavek pro ve\u0161ker\u00e9 dod\u00e1vky oceli HVAC<\/td><\/tr><tr><td>EN 10204 3.2<\/td><td>Jako 3.1, ale potvrzeno nez\u00e1visl\u00fdm inspektorem<\/td><td>Kritick\u00e9 tlakov\u00e9 komponenty, dod\u00e1vky ov\u011b\u0159en\u00e9 t\u0159et\u00ed stranou<\/td><\/tr><tr><td>EN 1090-1 CE zna\u010dka<\/td><td>Shoda konstruk\u010dn\u00edho ocelov\u00e9ho prvku pro stavby<\/td><td>Konstruk\u010dn\u00ed ocel pou\u017e\u00edvan\u00e1 ve stavb\u00e1ch podle EU CPR<\/td><\/tr><tr><td>Certifik\u00e1t ISO 9001<\/td><td>Syst\u00e9m managementu kvality u v\u00fdrobce<\/td><td>Kvalifikace dodavatele; v\u017edy vy\u017eadujte u nov\u00fdch dodavatel\u016f<\/td><\/tr><tr><td>Prohl\u00e1\u0161en\u00ed REACH<\/td><td>\u017d\u00e1dn\u00e9 omezen\u00e9 l\u00e1tky (SVHC) nad limit<\/td><td>Povrstven\u00e9 materi\u00e1ly, povrchov\u011b upraven\u00e9 produkty, dod\u00e1vky z EU<\/td><\/tr><tr><td>Z\u00e1znam o sledovatelnosti tavby \/ \u0161ar\u017ee<\/td><td>Propojuje hotov\u00fd materi\u00e1l s konkr\u00e9tn\u00ed v\u00fdrobn\u00ed \u0161ar\u017e\u00ed<\/td><td>Hygienick\u00e9 HVAC, farmacie, potravin\u00e1\u0159stv\u00ed<\/td><\/tr><\/tbody><\/table><p><\/p><h2>Kontroln\u00ed seznam pro hodnocen\u00ed dodavatele oceli HVAC<\/h2><p><\/p><p>Hodnocen\u00ed nov\u00e9ho dodavatele oceli pro v\u00fdrobu HVAC vy\u017eaduje kontrolu sedmi oblast\u00ed: certifikace kvality, schopnost dokumentace, rozsah jakost\u00ed, schopnost zpracov\u00e1n\u00ed, exportn\u00ed zku\u0161enosti, spolehlivost dodac\u00edch lh\u016ft a minim\u00e1ln\u00ed objednac\u00ed podm\u00ednky. Dodavatel, kter\u00fd sel\u017ee v kter\u00e9koli z prvn\u00edch t\u0159\u00ed oblast\u00ed, by nem\u011bl b\u00fdt kvalifikov\u00e1n bez ohledu na cenovou v\u00fdhodu, proto\u017ee neshodn\u00fd materi\u00e1l, kter\u00fd se dostane na v\u00fdrobn\u00ed linku, stoj\u00ed n\u00e1sobky cenov\u00e9ho rozd\u00edlu materi\u00e1lu.<\/p><h3>1. Kvalita a certifikace<\/h3><ul class=\"checklist\"><li><strong>Certifik\u00e1t ISO 9001 platn\u00fd a od uzn\u00e1van\u00e9ho org\u00e1nu<\/strong> (T\u00dcV, Bureau Veritas, SGS, Lloyd&#8217;s)<\/li><li><strong>Atesty 3.1 podle EN 10204 dostupn\u00e9<\/strong> pro v\u0161echny kategorie materi\u00e1lu, kter\u00e9 po\u017eadujete<\/li><li><strong>Hmotnost povlaku ov\u011b\u0159en\u00e1 XRF nebo mokrou chemickou zkou\u0161kou<\/strong> \u2013 nikoli pouze deklarovan\u00e1 v certifik\u00e1tu<\/li><li><strong>Sledovatelnost \u0161ar\u017ee a tavby<\/strong> udr\u017eovan\u00e1 od svitku z v\u00e1lcovny a\u017e po hotov\u00fd plech nebo p\u00e1s<\/li><li><strong>Schopnost prov\u00e1d\u011bn\u00ed podle EN 1090<\/strong>, pokud jsou v rozsahu konstruk\u010dn\u00ed ocelov\u00e9 prvky<\/li><\/ul><h3>2. Jakost a sortiment produkt\u016f<\/h3><ul class=\"checklist\"><li><strong>DX51D+Z275 a DX52D+Z275<\/strong> ve standardn\u00edch tlou\u0161\u0165k\u00e1ch HVAC (0,5\u20131,2 mm) potvrzeny jako dostupn\u00e9<\/li><li><strong>Nerezov\u00fd plech AISI 304 \/ 316<\/strong> s povrchovou \u00fapravou 2B dostupn\u00fd, pokud je v rozsahu hygienick\u00e9 potrub\u00ed<\/li><li><strong>Hlin\u00edkov\u00fd svitek 1050 \/ 3003<\/strong>, pokud jsou lamely v\u00fdm\u011bn\u00edk\u016f tepla odeb\u00edr\u00e1ny od stejn\u00e9ho dodavatele<\/li><li><strong>Konstruk\u010dn\u00ed profily S235 \/ S275<\/strong>, pokud jsou v rozsahu r\u00e1my a podp\u011bry<\/li><li><strong>Tlakov\u00e9 trubky EN 10216<\/strong>, pokud jsou v rozsahu chladic\u00ed nebo tlakov\u00e9 potrub\u00ed<\/li><\/ul><h3>3. Schopnost zpracov\u00e1n\u00ed (pokud objedn\u00e1v\u00e1te d\u00edly, nejen materi\u00e1l)<\/h3><ul class=\"checklist\"><li><strong>Potvrzena schopnost \u0159ez\u00e1n\u00ed laserem<\/strong>: minim\u00e1ln\u011b 4 kW vl\u00e1knov\u00fd laser, max. tlou\u0161\u0165ka pro po\u017eadovan\u00fd materi\u00e1l<\/li><li><strong>Kapacita CNC ohra\u0148ovac\u00edho lisu<\/strong> dostate\u010dn\u00e1 pro po\u017eadovanou d\u00e9lku ohybu a tlou\u0161\u0165ku materi\u00e1lu<\/li><li><strong>Z\u00e1vazky ohledn\u011b tolerance rovinnosti a tlou\u0161\u0165ky<\/strong> zdokumentovan\u00e9 v potvrzen\u00ed objedn\u00e1vky<\/li><li><strong>Vzorky d\u00edl\u016f nebo referen\u010dn\u00ed v\u00fdroba<\/strong> p\u0159ezkoum\u00e1ny p\u0159ed prvn\u00ed v\u00fdrobn\u00ed objedn\u00e1vkou<\/li><\/ul><h3>4. Obchodn\u00ed a logistick\u00e9 podm\u00ednky<\/h3><ul class=\"checklist\"><li><strong>Potvrzen\u00e9 Incoterms<\/strong> (FOB, CIF nebo DDP) s uveden\u00fdm p\u0159\u00edstavem nebo m\u00edstem dod\u00e1n\u00ed<\/li><li><strong>Dodac\u00ed lh\u016fta potvrzena p\u00edsemn\u011b<\/strong> v\u010detn\u011b doby v\u00fdroby a p\u0159epravy<\/li><li><strong>Minim\u00e1ln\u00ed objednac\u00ed mno\u017estv\u00ed<\/strong> p\u0159ijateln\u00e9 pro va\u0161i frekvenci objedn\u00e1vek a skladovac\u00ed kapacitu<\/li><li><strong>Platebn\u00ed podm\u00ednky<\/strong> zdokumentovan\u00e9 a odsouhlasen\u00e9 p\u0159ed prvn\u00ed objedn\u00e1vkou<\/li><li><strong>Schopnost exportn\u00ed dokumentace<\/strong>: EUR.1, balic\u00ed list, CMR\/n\u00e1kladn\u00ed list, prohl\u00e1\u0161en\u00ed REACH<\/li><\/ul><p><\/p><h2>Z\u00edsk\u00e1v\u00e1n\u00ed oceli pro HVAC z Turecka p\u0159es Steeling.net<\/h2><p><\/p><p>Ture\u010dt\u00ed v\u00fdrobci dod\u00e1vaj\u00ed pozinkovan\u00fd plech, nerezovou ocel, hlin\u00edkov\u00e9 svitky, konstruk\u010dn\u00ed profily a zpracovan\u00e9 komponenty HVAC \u2013 v\u010detn\u011b laserem \u0159ezan\u00fdch panel\u016f, CNC oh\u00fdban\u00fdch sk\u0159\u00edn\u00ed, v\u011btrac\u00edch m\u0159\u00ed\u017eek, kabelov\u00fdch \u017elab\u016f a potrubn\u00edch tvarovek \u2013 podle norem EN s kompletn\u00ed dokumentac\u00ed EN 10204 3.1. <a href=\"https:\/\/steeling.net\">Steeling.net<\/a> poskytuje p\u0159\u00edm\u00fd p\u0159\u00edstup k certifikovan\u00fdm tureck\u00fdm v\u00fdrobc\u016fm oceli pro kupuj\u00edc\u00ed v oboru HVAC, p\u0159i\u010dem\u017e slad\u00ed po\u017eadavky na materi\u00e1l a zpracov\u00e1n\u00ed se spr\u00e1vn\u00fdm dodavatelem a koordinuje cenov\u00e9 nab\u00eddky, dokumentaci a logistiku. Pro kupuj\u00edc\u00ed nejsou \u00fa\u010dtov\u00e1ny \u017e\u00e1dn\u00e9 poplatky. Kompletn\u00ed specifikaci materi\u00e1lu \u2013 jakost, t\u0159\u00eddu povlaku, toleranci tlou\u0161\u0165ky, povrchovou \u00fapravu a po\u017eadavky na certifikaci \u2013 lze zaslat na <a href=\"\/contact-us\/\">steeling.net\/contact-us\/<\/a>.<\/p><p><\/p><h2>\u010casto kladen\u00e9 ot\u00e1zky<\/h2><div class=\"faq-item\"><p class=\"faq-q\">Jak\u00e1 jakost oceli se pou\u017e\u00edv\u00e1 pro potrub\u00ed HVAC?<\/p><p class=\"faq-a\">Standardn\u00ed jakost\u00ed oceli pro potrub\u00ed HVAC je DX51D+Z275 podle EN 10346 \u2013 \u017e\u00e1rov\u011b pozinkovan\u00fd n\u00edzkouhl\u00edkov\u00fd ocelov\u00fd plech s hmotnost\u00ed zinkov\u00e9ho povlaku 275 g\/m\u00b2. Tlou\u0161\u0165ka se pohybuje od 0,5 mm pro mal\u00e9 spir\u00e1lov\u00e9 potrub\u00ed a\u017e po 1,2 mm pro velk\u00e9 obd\u00e9ln\u00edkov\u00e9 potrub\u00ed a opl\u00e1\u0161t\u011bn\u00ed VZT jednotek. DX52D+Z275 je specifikov\u00e1na pro slo\u017eit\u011bj\u0161\u00ed tvarovan\u00e9 d\u00edly vy\u017eaduj\u00edc\u00ed vy\u0161\u0161\u00ed tv\u00e1rnost. Nerezov\u00e1 ocel (AISI 304 nebo 316) nahrazuje pozinkovan\u00fd plech v hygienick\u00fdch, farmaceutick\u00fdch nebo korozivn\u00edch instalac\u00edch.<\/p><\/div><div class=\"faq-item\"><p class=\"faq-q\">Co znamen\u00e1 ozna\u010den\u00ed povlaku Z275 u pozinkovan\u00e9 oceli?<\/p><p class=\"faq-a\">Z275 ozna\u010duje hmotnost zinkov\u00e9ho povlaku 275 gram\u016f na metr \u010dtvere\u010dn\u00ed celkov\u00e9ho povrchu plechu (ob\u011b strany dohromady), jak je definov\u00e1no v EN 10346. Toto je nej\u010dast\u011bji specifikovan\u00e1 t\u0159\u00edda povlaku pro potrub\u00ed HVAC, kter\u00e1 poskytuje \u017eivotnost 15\u201325 let ve standardn\u00edch vnit\u0159n\u00edch prostor\u00e1ch. Pob\u0159e\u017en\u00ed, vysoce vlhk\u00e9 nebo polovenkovn\u00ed instalace obvykle vy\u017eaduj\u00ed Z350 nebo vy\u0161\u0161\u00ed. Z100 a Z200 jsou vhodn\u00e9 pouze pro such\u00e9 vnit\u0159n\u00ed aplikace.<\/p><\/div><div class=\"faq-item\"><p class=\"faq-q\">Jak\u00fd je rozd\u00edl mezi pozinkovan\u00fdm plechem DX51D a DX52D?<\/p><p class=\"faq-a\">DX51D je \u017e\u00e1rov\u011b pozinkovan\u00e1 ocel pro v\u0161eobecn\u00e9 pou\u017eit\u00ed vhodn\u00e1 pro v\u00e1lcov\u00e1n\u00ed, profilov\u00e1n\u00ed a lehk\u00e9 oh\u00fdb\u00e1n\u00ed. DX52D m\u00e1 ni\u017e\u0161\u00ed mez kluzu a vy\u0161\u0161\u00ed ta\u017enost, co\u017e poskytuje v\u011bt\u0161\u00ed tv\u00e1rnost pro hlub\u0161\u00ed ohyby, lemov\u00e1n\u00ed a lisovan\u00e9 komponenty. Pro standardn\u00ed obd\u00e9ln\u00edkov\u00e9 a spir\u00e1lov\u00e9 potrub\u00ed je DX51D dosta\u010duj\u00edc\u00ed. U slo\u017eit\u00fdch tvarovek, ohyb\u016f a p\u0159esazen\u00ed vy\u017eaduj\u00edc\u00edch tvarov\u00e1n\u00ed s mal\u00fdm polom\u011brem sni\u017euje DX52D riziko prask\u00e1n\u00ed a zlep\u0161uje rozm\u011brovou p\u0159esnost.<\/p><\/div><div class=\"faq-item\"><p class=\"faq-q\">Kdy by se m\u011bla v HVAC pou\u017e\u00edt nerezov\u00e1 ocel m\u00edsto pozinkovan\u00e9?<\/p><p class=\"faq-a\">Nerezov\u00e1 ocel (AISI 304 nebo 316) nahrazuje pozinkovan\u00fd plech ve \u010dty\u0159ech hlavn\u00edch sc\u00e9n\u00e1\u0159\u00edch HVAC: (1) hygienick\u00e9 aplikace, kde jsou vy\u017eadov\u00e1ny hladk\u00e9, \u010distiteln\u00e9 povrchy \u2013 farmacie, potravin\u00e1\u0159stv\u00ed, chirurgie; (2) korozivn\u00ed prost\u0159ed\u00ed, kde by byl zinkov\u00fd povlak chemicky napaden; (3) pob\u0159e\u017en\u00ed nebo n\u00e1mo\u0159n\u00ed instalace, kde expozice soli urychluje galvanickou korozi; a (4) vysokoteplotn\u00ed odtahy nebo kuchy\u0148sk\u00e9 v\u011btr\u00e1n\u00ed, kde by se zinkov\u00fd povlak degradoval. AISI 316 je preferov\u00e1na p\u0159ed 304 tam, kde je v\u00fdznamn\u00e1 expozice chlorid\u016fm.<\/p><\/div><div class=\"faq-item\"><p class=\"faq-q\">Jak\u00fd atest z v\u00e1lcovny m\u00e1m po\u017eadovat pro ocel HVAC?<\/p><p class=\"faq-a\">Standardn\u00edm po\u017eadavkem pro dod\u00e1vky oceli HVAC je atest 3.1 podle EN 10204, vystaven\u00fd v\u00fdrobcem, potvrzuj\u00edc\u00ed chemick\u00e9 slo\u017een\u00ed a mechanick\u00e9 vlastnosti pro konkr\u00e9tn\u00ed dodanou tavbu nebo \u0161ar\u017ei. U konstruk\u010dn\u00edch ocelov\u00fdch prvk\u016f ve stavb\u00e1ch m\u016f\u017ee b\u00fdt vy\u017eadov\u00e1no dodate\u010dn\u00e9 ozna\u010den\u00ed CE podle EN 1090-1. Pro hygienick\u00e9 syst\u00e9my HVAC v regulovan\u00e9m prost\u0159ed\u00ed by m\u011bl b\u00fdt spolu s atestem 3.1 vy\u017eadov\u00e1n kompletn\u00ed z\u00e1znam o sledovatelnosti \u0161ar\u017ee propojuj\u00edc\u00ed materi\u00e1l s konkr\u00e9tn\u00ed v\u00fdrobn\u00ed tavbou.<\/p><\/div><div class=\"faq-item\"><p class=\"faq-q\">Jakou toleranci tlou\u0161\u0165ky m\u00e1m specifikovat pro svitky pod\u00e1van\u00e9 do automatizovan\u00fdch linek?<\/p><p class=\"faq-a\">Pro svitky pod\u00e1van\u00e9 do automatizovan\u00fdch stroj\u016f na spir\u00e1lov\u00e9 potrub\u00ed nebo stroj\u016f na p\u0159\u00edruby TDC specifikujte toleranci tlou\u0161\u0165ky p\u0159\u00edsn\u011bj\u0161\u00ed, ne\u017e je norma EN 10143 \u2013 obvykle \u00b10,03 a\u017e \u00b10,05 mm pro tlou\u0161\u0165ky pod 1,0 mm. Standardn\u00ed tolerance EN 10143 (\u00b10,05\u20130,09 mm v z\u00e1vislosti na tlou\u0161\u0165ce) jsou p\u0159ijateln\u00e9 pro ru\u010dn\u011b manipulovan\u00fd plech, ale zp\u016fsobuj\u00ed nekonzistence v pod\u00e1v\u00e1n\u00ed a probl\u00e9my s kvalitou \u0161v\u016f na vysokorychlostn\u00edch automatizovan\u00fdch link\u00e1ch. Pro svitky ur\u010den\u00e9 k automatizovan\u00e9mu zpracov\u00e1n\u00ed rovn\u011b\u017e specifikujte rovinnost na I \u2264 10 jednotek (EN 10131 t\u0159\u00edda A).<\/p><\/div><p><\/p><div class=\"cta-inline\"><strong>Pot\u0159ebujete ocel pro HVAC od certifikovan\u00fdch tureck\u00fdch v\u00fdrobc\u016f?<\/strong><p>Pozinkovan\u00fd plech, nerez, hlin\u00edk, konstruk\u010dn\u00ed profily \u2013 nebo zpracovan\u00e9 komponenty podle v\u00fdkresu. Po\u0161lete svou specifikaci a Steeling.net v\u00e1m vr\u00e1t\u00ed konkurenceschopnou nab\u00eddku s kompletn\u00ed dokumentac\u00ed EN. \u017d\u00e1dn\u00e9 poplatky pro kupuj\u00edc\u00ed.<\/p><p><a class=\"cta-btn\" href=\"\/contact-us\/\">Z\u00edskat cenovou nab\u00eddku zdarma \u2192<\/a><\/p><\/div><\/div><p><script type=\"application\/ld+json\"><br \/>\n{<br \/>\n  \"@context\": \"https:\/\/schema.org\",<br \/>\n  \"@type\": \"BlogPosting\",<br \/>\n  \"headline\": \"Steel Grades for HVAC Systems: Specifications, Tolerances and Supplier Checklist\",<br \/>\n  \"description\": \"A complete technical reference for HVAC engineers and procurement teams: steel grades, galvanized coating classes, thickness tolerances, certification requirements, and a supplier evaluation checklist.\",<br \/>\n  \"datePublished\": \"2026-08-06\",<br \/>\n  \"dateModified\": \"2026-08-06\",<br \/>\n  \"author\": { \"@type\": \"Organization\", \"name\": \"Steeling.net\", \"url\": \"https:\/\/steeling.net\" },<br \/>\n  \"publisher\": { \"@type\": \"Organization\", \"name\": \"Steeling.net\", \"url\": \"https:\/\/steeling.net\" },<br \/>\n  \"mainEntityOfPage\": { \"@type\": \"WebPage\", \"@id\": \"https:\/\/steeling.net\/blog\/steel-grades-hvac-systems\/\" },<br \/>\n  \"keywords\": [\"steel grades HVAC\", \"galvanized steel HVAC\", \"DX51D HVAC\", \"HVAC steel specification\", \"steel supplier HVAC\"]<br \/>\n}<br \/>\n<\/script><\/p><p><script type=\"application\/ld+json\"><br \/>\n{<br \/>\n  \"@context\": \"https:\/\/schema.org\",<br \/>\n  \"@type\": \"FAQPage\",<br \/>\n  \"mainEntity\": [<br \/>\n    { \"@type\": \"Question\", \"name\": \"What steel grade is used for HVAC ductwork?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"The standard grade is DX51D+Z275 to EN 10346 \u2014 hot-dip galvanized sheet with 275 g\/m\u00b2 zinc coating. Thickness 0.5\u20131.2 mm depending on duct size. DX52D+Z275 is used for complex formed fittings. Stainless steel (AISI 304 or 316) replaces galvanized in hygienic or corrosive installations.\" } },<br \/>\n    { \"@type\": \"Question\", \"name\": \"What does the Z275 coating designation mean on galvanized steel?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Z275 means 275 grams of zinc per square metre of total sheet surface (both sides) per EN 10346. It provides 15\u201325 years service life in standard indoor environments and is the most commonly specified coating class for HVAC ductwork.\" } },<br \/>\n    { \"@type\": \"Question\", \"name\": \"What is the difference between DX51D and DX52D galvanized sheet?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"DX51D is general-purpose galvanized steel for roll forming and light bending. DX52D has higher formability (lower yield, higher elongation) for complex fittings, deep bends, and flanging. DX51D suits standard duct; DX52D suits formed fittings and offsets.\" } },<br \/>\n    { \"@type\": \"Question\", \"name\": \"When should stainless steel be used instead of galvanized steel in HVAC?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Use stainless (AISI 304 or 316) for hygienic HVAC (pharmaceutical, food, surgical), corrosive environments, coastal\/marine installations, and high-temperature kitchen or exhaust ventilation where zinc coating would degrade.\" } },<br \/>\n    { \"@type\": \"Question\", \"name\": \"What mill certificate should I request for HVAC steel?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Request EN 10204 3.1 mill test certificate as the minimum standard for all HVAC steel supply. For structural components in buildings, CE marking under EN 1090-1 may also be required. For hygienic HVAC, add batch traceability records.\" } },<br \/>\n    { \"@type\": \"Question\", \"name\": \"What thickness tolerance should I specify for coil fed into automated duct lines?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Specify \u00b10.03\u20130.05 mm for gauges under 1.0 mm \u2014 tighter than EN 10143 standard tolerance. Also specify flatness I \u2264 10 units (EN 10131 Class A). Standard mill tolerances cause feed inconsistencies on high-speed automated duct forming lines.\" } }<br \/>\n  ]<br \/>\n}<br \/>\n<\/script><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Kompletn\u00ed technick\u00e1 p\u0159\u00edru\u010dka pro in\u017een\u00fdry v oboru HVAC a n\u00e1kupn\u00ed t\u00fdmy: t\u0159\u00eddy oceli (DX51D, DX52D, AISI 304), t\u0159\u00eddy pozinkov\u00e1n\u00ed, tolerance tlou\u0161\u0165ky, po\u017eadavky na certifikaci a kontroln\u00ed seznam pro hodnocen\u00ed dodavatel\u016f.<\/p>\n","protected":false},"author":1,"featured_media":47077,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47549","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-genel"],"_links":{"self":[{"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/posts\/47549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/comments?post=47549"}],"version-history":[{"count":3,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/posts\/47549\/revisions"}],"predecessor-version":[{"id":47562,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/posts\/47549\/revisions\/47562"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/media\/47077"}],"wp:attachment":[{"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/media?parent=47549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/categories?post=47549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steeling.net\/cs\/wp-json\/wp\/v2\/tags?post=47549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}