{"id":4097,"date":"2026-01-13T09:00:00","date_gmt":"2026-01-13T09:00:00","guid":{"rendered":"https:\/\/www.desopipe.com\/?p=4097"},"modified":"2026-02-06T03:44:35","modified_gmt":"2026-02-06T03:44:35","slug":"ppr-pipe-wall-thickness-sdr-vs-pn","status":"publish","type":"post","link":"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/","title":{"rendered":"Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa SDR v\u00e0 PN: L\u1ef1a ch\u1ecdn \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng PPR ph\u00f9 h\u1ee3p cho m\u1ee5c \u0111\u00edch c\u00f4ng nghi\u1ec7p."},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Chuy\u1ec3n \u0111\u1ed5i m\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Why_SDR_and_PN_Are_Not_Interchangeable\" >V\u00ec sao SDR v\u00e0 PN kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Selecting_Based_on_Operating_Conditions\" >L\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Temperature_Derating\" >Gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Surge_Pressure_and_Water_Hammer\" >\u00c1p su\u1ea5t d\u00e2ng v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng b\u00faa n\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Chemical_and_Mechanical_Factors\" >C\u00e1c y\u1ebfu t\u1ed1 h\u00f3a h\u1ecdc v\u00e0 c\u01a1 h\u1ecdc<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Common_Selection_Errors\" >C\u00e1c l\u1ed7i ch\u1ecdn l\u1ef1a th\u01b0\u1eddng g\u1eb7p<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Mismatching_Components_Across_SDR_Classes\" >C\u00e1c th\u00e0nh ph\u1ea7n kh\u00f4ng kh\u1edbp nhau gi\u1eefa c\u00e1c l\u1edbp SDR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Specifying_by_PN_Without_Checking_Temperature\" >Ch\u1ec9 \u0111\u1ecbnh theo PN m\u00e0 kh\u00f4ng c\u1ea7n ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Applying_Standard_Fusion_Parameters_to_Thick-Walled_Pipe\" >\u00c1p d\u1ee5ng c\u00e1c th\u00f4ng s\u1ed1 h\u00e0n ti\u00eau chu\u1ea9n cho \u1ed1ng th\u00e0nh d\u00e0y<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Ignoring_Thermal_Expansion_in_Hot_Systems\" >B\u1ecf qua s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t trong c\u00e1c h\u1ec7 th\u1ed1ng n\u00f3ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#DESOs_Manufacturing_Precision_and_Project_Experience\" >\u0110\u1ed9 ch\u00ednh x\u00e1c trong s\u1ea3n xu\u1ea5t v\u00e0 kinh nghi\u1ec7m d\u1ef1 \u00e1n c\u1ee7a DESO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#What_This_Means_for_Specification\" >\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1eadp \u0111\u1eb7c t\u1ea3 k\u1ef9 thu\u1eadt?<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">SDR \u0111o \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng so v\u1edbi \u0111\u01b0\u1eddng k\u00ednh \u1ed1ng. PN cho bi\u1ebft \u0111\u1ecbnh m\u1ee9c \u00e1p su\u1ea5t \u1edf 20\u00b0C. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng ph\u00f9 h\u1ee3p cho h\u1ec7 th\u1ed1ng PPR c\u00f4ng nghi\u1ec7p ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c kh\u1edbp c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a \u1ed1ng v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh nh\u01b0 nhi\u1ec7t \u0111\u1ed9 ch\u1ea5t l\u1ecfng v\u00e0 \u00e1p su\u1ea5t \u0111\u1ed9t bi\u1ebfn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_SDR_and_PN_Are_Not_Interchangeable\"><\/span><strong>V\u00ec sao SDR v\u00e0 PN kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng coi SDR v\u00e0 PN l\u00e0 c\u00f9ng m\u1ed9t th\u1ee9. Nh\u01b0ng th\u1ef1c t\u1ebf ch\u00fang kh\u00f4ng gi\u1ed1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SDR (T\u1ef7 l\u1ec7 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n)<\/strong> \u0110\u00e2y l\u00e0 th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc. N\u00f3 l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng (SDR = D\/s). Ch\u1ec9 s\u1ed1 SDR c\u00e0ng th\u1ea5p th\u00ec th\u00e0nh \u1ed1ng c\u00e0ng d\u00e0y so v\u1edbi k\u00edch th\u01b0\u1edbc \u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PN (\u00c1p su\u1ea5t danh ngh\u0129a)<\/strong> Th\u00f4ng s\u1ed1 n\u00e0y th\u1ec3 hi\u1ec7n hi\u1ec7u su\u1ea5t \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9 c\u1ee5 th\u1ec3. N\u00f3 cho bi\u1ebft \u00e1p su\u1ea5t t\u1ed1i \u0111a (t\u00ednh b\u1eb1ng bar) m\u00e0 \u1ed1ng c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u1edf 20\u00b0C trong su\u1ed1t 50 n\u0103m s\u1eed d\u1ee5ng. \u1ed0ng PN20 PPR ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 \u1edf m\u1ee9c 20 bar \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"532\" height=\"304\" src=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN.webp\" alt=\"\" class=\"wp-image-4099\" srcset=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN.webp 532w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-500x286.webp 500w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-300x171.webp 300w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-18x10.webp 18w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-131x75.webp 131w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-480x274.webp 480w\" sizes=\"auto, (max-width:767px) 480px, 532px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9 s\u1ed1 SDR th\u1ea5p h\u01a1n c\u00f3 ngh\u0129a l\u00e0 th\u00e0nh \u1ed1ng d\u00e0y h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p su\u1ea5t cao h\u01a1n. \u1ed0ng c\u00f3 ch\u1ec9 s\u1ed1 SDR 6 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t cao h\u01a1n \u1ed1ng c\u00f3 ch\u1ec9 s\u1ed1 SDR 11. Tuy nhi\u00ean, ch\u1ec9 s\u1ed1 PN thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 trong khi ch\u1ec9 s\u1ed1 SDR kh\u00f4ng \u0111\u1ed5i.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>L\u1edbp SDR<\/strong><\/td><td><strong>X\u1ebfp h\u1ea1ng PN<\/strong><\/td><td><strong>\u0110\u1ed9 d\u00e0y c\u1ee7a t\u01b0\u1eddng<\/strong><\/td><td><strong>S\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p ch\u00ednh<\/strong><\/td><\/tr><tr><td>SDR 11<\/td><td>PN10<\/td><td>G\u1ea7y<\/td><td>V\u1eadn chuy\u1ec3n n\u01b0\u1edbc l\u1ea1nh, tho\u00e1t n\u01b0\u1edbc \u00e1p su\u1ea5t th\u1ea5p<\/td><\/tr><tr><td>SDR 7.4<\/td><td>PN16<\/td><td>Trung b\u00ecnh<\/td><td>Kh\u00ed n\u00e9n, n\u01b0\u1edbc n\u00f3ng v\u1eeba ph\u1ea3i<\/td><\/tr><tr><td>SDR 6<\/td><td>PN20<\/td><td>D\u00e0y<\/td><td>N\u01b0\u1edbc n\u00f3ng \u00e1p su\u1ea5t cao, l\u00e0m m\u00e1t c\u00f4ng nghi\u1ec7p<\/td><\/tr><tr><td>SDR 5<\/td><td>PN25<\/td><td>Si\u00eau d\u00e0y<\/td><td>Ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t, c\u1ea5p li\u1ec7u l\u00f2 h\u01a1i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">DESO c\u1ee7a <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-sizes-and-specifications-guide-for-buyer\/\" target=\"_blank\" rel=\"noreferrer noopener\">h\u01b0\u1edbng d\u1eabn v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/a> Li\u1ec7t k\u00ea k\u00edch th\u01b0\u1edbc \u1ed1ng PPR tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i SDR.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Selecting_Based_on_Operating_Conditions\"><\/span><strong>L\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 trong catalog gi\u1ea3 \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 20\u00b0C v\u00e0 l\u01b0u l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh. C\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n v\u00e0 c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng t\u0103ng \u00e1p \u0111\u1ed9t ng\u1ed9t m\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt trong catalog kh\u00f4ng t\u00ednh \u0111\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Temperature_Derating\"><\/span><strong>Gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-flow-rate-reduce-pressure-loss-in-buildings\/\" target=\"_blank\" rel=\"noreferrer noopener\">x\u1ebfp h\u1ea1ng \u00e1p su\u1ea5t \u1ed1ng ppr<\/a> \u00c1p su\u1ea5t gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng. \u1ed0ng PN20 c\u00f3 \u0111\u1ecbnh m\u1ee9c 20 bar \u1edf 20\u00b0C s\u1ebd gi\u1ea3m xu\u1ed1ng c\u00f2n 10,8 bar \u1edf 70\u00b0C. \u1ede 80\u00b0C, n\u00f3 ch\u1ec9 ch\u1ecbu \u0111\u01b0\u1ee3c 8 bar.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Nhi\u1ec7t \u0111\u1ed9<\/strong><\/td><td><strong>Dung t\u00edch th\u1ef1c t\u1ebf PN20<\/strong><\/td><td><strong>Dung t\u00edch th\u1ef1c t\u1ebf PN25<\/strong><\/td><\/tr><tr><td>20\u00b0C<\/td><td>20 bar<\/td><td>25 bar<\/td><\/tr><tr><td>60\u00b0C<\/td><td>12,5 bar<\/td><td>15,6 bar<\/td><\/tr><tr><td>70\u00b0C<\/td><td>10,8 bar<\/td><td>13,5 bar<\/td><\/tr><tr><td>80\u00b0C<\/td><td>8,0 bar<\/td><td>10,0 bar<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Surge_Pressure_and_Water_Hammer\"><\/span><strong>\u00c1p su\u1ea5t d\u00e2ng v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng b\u00faa n\u01b0\u1edbc<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1y b\u01a1m c\u00f4ng nghi\u1ec7p t\u1ea1o ra xung \u00e1p th\u1ee7y l\u1ef1c trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng v\u00e0 \u0111\u00f3ng van. M\u1ed9t h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf \u00e1p su\u1ea5t 12 bar c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng t\u0103ng \u0111\u1ed9t bi\u1ebfn l\u00ean 18 bar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ecb hi\u1ec7n t\u01b0\u1ee3ng b\u00faa n\u01b0\u1edbc, h\u00e3y th\u00eam bi\u00ean \u0111\u1ed9 an to\u00e0n 50% khi ch\u1ecdn SDR. \u1ed0ng nh\u1ef1a ch\u1ecbu \u00e1p l\u1ef1c cao v\u1edbi SDR 6 ho\u1eb7c SDR 5 s\u1ebd h\u1ea5p th\u1ee5 c\u00e1c xung \u0111\u1ed9t bi\u1ebfn t\u1ea1m th\u1eddi m\u00e0 n\u1ebfu th\u00e0nh \u1ed1ng m\u1ecfng h\u01a1n s\u1ebd b\u1ecb v\u1ee1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chemical_and_Mechanical_Factors\"><\/span><strong>C\u00e1c y\u1ebfu t\u1ed1 h\u00f3a h\u1ecdc v\u00e0 c\u01a1 h\u1ecdc<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u00f3a ch\u1ea5t \u0103n m\u00f2n l\u00e0m xu\u1ed1ng c\u1ea5p b\u1ec1 m\u1eb7t b\u00ean trong \u1ed1ng theo th\u1eddi gian. Th\u00e0nh \u1ed1ng d\u00e0y h\u01a1n (SDR th\u1ea5p h\u01a1n) t\u1ea1o ra kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd trong v\u1eadn chuy\u1ec3n h\u00f3a ch\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rung \u0111\u1ed9ng v\u00e0 t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i c\u0169ng g\u00f3p ph\u1ea7n l\u00e0m gi\u1ea3m SDR. \u0110\u1ed9 c\u1ee9ng t\u0103ng th\u00eam gi\u00fap ng\u0103n ng\u1eeba bi\u1ebfn d\u1ea1ng c\u00f3 th\u1ec3 l\u00e0m n\u1ee9t c\u00e1c \u1ed1ng m\u1ecfng h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DESO c\u1ee7a <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/select-ppr-pipe-in-different-conditions\/\">h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn \u1ee9ng d\u1ee5ng<\/a> N\u1ed9i dung n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1ch nhi\u1ec7t \u0111\u1ed9, \u00e1p su\u1ea5t v\u00e0 lo\u1ea1i ch\u1ea5t l\u1ecfng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a \u1ed1ng PPR.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Selection_Errors\"><\/span><strong>C\u00e1c l\u1ed7i ch\u1ecdn l\u1ef1a th\u01b0\u1eddng g\u1eb7p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mismatching_Components_Across_SDR_Classes\"><\/span><strong>C\u00e1c th\u00e0nh ph\u1ea7n kh\u00f4ng kh\u1edbp nhau gi\u1eefa c\u00e1c l\u1edbp SDR<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1c ph\u1ee5 ki\u1ec7n PN10 tr\u00ean \u0111\u01b0\u1eddng \u1ed1ng PN20 t\u1ea1o ra \u0111i\u1ec3m ngh\u1ebdn. To\u00e0n b\u1ed9 \u0111\u01b0\u1eddng \u1ed1ng gi\u1edd \u0111\u00e2y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho PN10 v\u00ec b\u1ed9 ph\u1eadn y\u1ebfu nh\u1ea5t s\u1ebd quy\u1ebft \u0111\u1ecbnh gi\u1edbi h\u1ea1n. C\u00e1c ph\u1ee5 ki\u1ec7n th\u01b0\u1eddng h\u1ecfng tr\u01b0\u1edbc ti\u00ean, th\u01b0\u1eddng b\u1ecb v\u1ee1 d\u01b0\u1edbi \u00e1p su\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Specifying_by_PN_Without_Checking_Temperature\"><\/span><strong>Ch\u1ec9 \u0111\u1ecbnh theo PN m\u00e0 kh\u00f4ng c\u1ea7n ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng SDR 11 (PN10) cho h\u1ec7 th\u1ed1ng n\u01b0\u1edbc n\u00f3ng li\u00ean t\u1ee5c c\u00f3 v\u1ebb ph\u00f9 h\u1ee3p n\u1ebfu \u00e1p su\u1ea5t ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi 10 bar. Nh\u01b0ng \u1edf 70\u00b0C, c\u00f9ng lo\u1ea1i \u1ed1ng \u0111\u00f3 ch\u1ec9 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t 5-6 bar. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t s\u1edbm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applying_Standard_Fusion_Parameters_to_Thick-Walled_Pipe\"><\/span><strong>\u00c1p d\u1ee5ng c\u00e1c th\u00f4ng s\u1ed1 h\u00e0n ti\u00eau chu\u1ea9n cho \u1ed1ng th\u00e0nh d\u00e0y<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00e0nh \u1ed1ng d\u00e0y h\u01a1n \u0111\u00f2i h\u1ecfi th\u1eddi gian gia nhi\u1ec7t l\u00e2u h\u01a1n trong qu\u00e1 tr\u00ecnh h\u00e0n n\u00f3ng ch\u1ea3y. C\u00e1c k\u1ef9 thu\u1eadt vi\u00ean \u00e1p d\u1ee5ng th\u1eddi gian h\u00e0n SDR 11 cho \u1ed1ng SDR 6 ho\u1eb7c SDR 5 s\u1ebd t\u1ea1o ra c\u00e1c &quot;m\u1ed1i h\u00e0n ngu\u1ed9i&quot; n\u01a1i v\u1eadt li\u1ec7u kh\u00f4ng bao gi\u1edd \u0111\u1ea1t \u0111\u1ebfn \u0111\u1ed9 n\u00f3ng ch\u1ea3y ho\u00e0n to\u00e0n. C\u00e1c m\u1ed1i n\u1ed1i n\u00e0y tr\u00f4ng c\u00f3 v\u1ebb ho\u00e0n ch\u1ec9nh nh\u01b0ng l\u1ea1i b\u1ecb r\u00f2 r\u1ec9 d\u01b0\u1edbi \u00e1p su\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_Thermal_Expansion_in_Hot_Systems\"><\/span><strong>B\u1ecf qua s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t trong c\u00e1c h\u1ec7 th\u1ed1ng n\u00f3ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00e0nh \u1ed1ng m\u1ecfng h\u01a1n s\u1ebd gi\u00e3n n\u1edf nhi\u1ec1u h\u01a1n khi ch\u1ecbu nhi\u1ec7t. \u1ed0ng PPR ti\u00eau chu\u1ea9n trong c\u00e1c v\u00f2ng tu\u1ea7n ho\u00e0n n\u00f3ng s\u1ebd b\u1ecb u\u1ed1n l\u01b0\u1ee3n trong r\u00e3nh, g\u00e2y \u1ee9ng su\u1ea5t l\u00ean c\u00e1c m\u1ed1i n\u1ed1i v\u00e0 n\u1ee9t t\u1ea1i c\u00e1c \u0111i\u1ec3m k\u1ebft n\u1ed1i. <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-fiber-composite-pipe-gf-ppr-hot-water-choice\/\" target=\"_blank\" rel=\"noreferrer noopener\">Gia c\u01b0\u1eddng b\u1eb1ng s\u1ee3i<\/a> SDR 7.4 gi\u1ea3m \u0111\u1ed9 m\u1edf r\u1ed9ng xu\u1ed1ng 70% v\u00e0 gi\u1eef nguy\u00ean v\u1ecb tr\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DESOs_Manufacturing_Precision_and_Project_Experience\"><\/span><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c trong s\u1ea3n xu\u1ea5t v\u00e0 kinh nghi\u1ec7m d\u1ef1 \u00e1n c\u1ee7a DESO<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u01a1n hai th\u1eadp k\u1ef7 qua, DESO \u0111\u00e3 cung c\u1ea5p h\u1ec7 th\u1ed1ng PPR cho c\u00e1c nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t, m\u1ea1ng l\u01b0\u1edbi HVAC, h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t c\u00f4ng nghi\u1ec7p v\u00e0 h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc n\u1ed3i h\u01a1i \u00e1p su\u1ea5t cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u1edf c\u00e1c c\u1ea5p th\u1ea5p h\u01a1n t\u1ea1o ra nh\u1eefng &quot;\u0111i\u1ec3m m\u1ecfng&quot; n\u01a1i \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng thay \u0111\u1ed5i trong c\u00f9ng m\u1ed9t \u1ed1ng. Nh\u1eefng \u0111i\u1ec3m m\u1ecfng n\u00e0y s\u1ebd b\u1ecb h\u1ecfng tr\u01b0\u1edbc ti\u00ean v\u00ec th\u00e0nh \u1ed1ng kh\u00f4ng th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t \u0111\u1ecbnh m\u1ee9c t\u1ea1i ph\u1ea7n m\u1ecfng nh\u1ea5t c\u1ee7a n\u00f3. C\u00f4ng ngh\u1ec7 \u00e9p \u0111\u00f9n t\u1ef1 \u0111\u1ed9ng c\u1ee7a DESO s\u1eed d\u1ee5ng nh\u1ef1a nguy\u00ean sinh Borealis RA130E \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng \u0111\u1ea1t ti\u00eau chu\u1ea9n ISO 15874 tr\u00ean t\u1eebng m\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To\u00e0n b\u1ed9 d\u1ea3i SDR t\u1eeb SDR 11 \u0111\u1ebfn SDR 5 \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb m\u1ed9t ngu\u1ed3n duy nh\u1ea5t v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh. <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/manufacturer\/buyers-guide-to-high-quality-ppr-pipe-material\/\" target=\"_blank\" rel=\"noreferrer noopener\">v\u1eadt li\u1ec7u \u1ed1ng ppr<\/a> C\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo t\u1eebng l\u00f4 s\u1ea3n ph\u1ea9m. Nh\u00f3m k\u1ef9 thu\u1eadt c\u1ee7a DESO xem x\u00e9t c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a d\u1ef1 \u00e1n v\u00e0 \u0111\u1ec1 xu\u1ea5t ph\u00e2n lo\u1ea1i SDR d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng, \u00e1p su\u1ea5t v\u00e0 lo\u1ea1i ch\u1ea5t l\u1ecfng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_This_Means_for_Specification\"><\/span><strong>\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1eadp \u0111\u1eb7c t\u1ea3 k\u1ef9 thu\u1eadt?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SDR l\u00e0 th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc. PN l\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p su\u1ea5t \u1edf 20\u00b0C. Nhi\u1ec7t \u0111\u1ed9 l\u00e0m gi\u1ea3m c\u1ea3 hai th\u00f4ng s\u1ed1 n\u00e0y. \u0110\u1ed1i v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn \u1ed1ng PPR c\u00f4ng nghi\u1ec7p, c\u1ea7n ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi c\u1ea5p SDR d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng, c\u00e1c xung \u00e1p su\u1ea5t d\u1ef1 ki\u1ebfn v\u00e0 kh\u1ea3 n\u0103ng ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t. Th\u00e0nh ph\u1ea7n y\u1ebfu nh\u1ea5t trong h\u1ec7 th\u1ed1ng s\u1ebd gi\u1edbi h\u1ea1n kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p su\u1ea5t c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi n\u00f3.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.desopipe.com\/vi\/contact\/\" style=\"background-color:#0588a7\" target=\"_blank\" rel=\"noreferrer noopener\">Nh\u1eadn b\u00e1o gi\u00e1 mi\u1ec5n ph\u00ed<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>SDR measures wall thickness relative to pipe diameter. PN tells you the pressure rating at 20\u00b0C. Choosing the right plumbing wall thickness for industrial PPR systems<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":4100,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[],"class_list":["post-4097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ppr-pipe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PPR Pipe: Choosing the Right Wall Thickness (SDR vs PN) | DESO Group<\/title>\n<meta name=\"description\" content=\"Learn the difference between SDR and PN ratings for PPR pipes. Avoid common selection errors and match wall thickness to industrial conditions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PPR Pipe: Choosing the Right Wall Thickness (SDR vs PN) | DESO Group\" \/>\n<meta property=\"og:description\" content=\"Learn the difference between SDR and PN ratings for PPR pipes. 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