{"id":10703,"date":"2025-03-25T10:04:43","date_gmt":"2025-03-25T10:04:43","guid":{"rendered":"https:\/\/www.ctube-gr.com\/?p=10703"},"modified":"2026-04-24T06:29:09","modified_gmt":"2026-04-24T06:29:09","slug":"nhung-diem-khac-biet-chinh-giua-cac-loai-ong-dan-dien-sch40-so-voi-sch80-so-voi-db60-so-voi-db100-so-voi-db120-so-voi-loai-a-so-voi-loai-eb","status":"publish","type":"post","link":"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html","title":{"rendered":"Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn \u0111i\u1ec7n: SCH40 so v\u1edbi SCH80 so v\u1edbi DB60 so v\u1edbi DB100 so v\u1edbi DB120 so v\u1edbi Lo\u1ea1i A so v\u1edbi Lo\u1ea1i EB"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 ez-toc-custom 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=\"\u1ea8n\/Hi\u1ec7n 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: #444444;color:#444444\" 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: #444444;color:#444444\" 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' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#1_Introduction\" >1. Gi\u1edbi thi\u1ec7u<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#11_Why_Conduit_Specifications_Matter\" >1.1 T\u1ea1i sao th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u1ed1ng d\u1eabn \u0111i\u1ec7n l\u1ea1i quan tr\u1ecdng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#12_Referencing_Key_Standards\" >1.2 Tham chi\u1ebfu c\u00e1c ti\u00eau chu\u1ea9n ch\u00ednh<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#2_Understanding_Different_Conduit_Series_SCH_VS_DB_VS_EB_VS_A\" >2. Hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn kh\u00e1c nhau: SCH VS DB VS EB VS A<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#21_What_Are_Conduit_Schedules\" >2.1 B\u1ea3ng k\u00ea \u1ed1ng d\u1eabn l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#22_SCH_40_VS_80_PVC_Conduit\" >2.2 \u1ed0ng d\u1eabn PVC SCH 40 so v\u1edbi 80<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#23_What_is_Type_DB_Conduit\" >2.3 \u1ed0ng d\u1eabn lo\u1ea1i DB l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#24_What_is_Type_EB_Conduit\" >2.4 \u1ed0ng d\u1eabn lo\u1ea1i EB l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#25_What_is_Type_A_Conduit\" >2.5 \u1ed0ng d\u1eabn lo\u1ea1i A l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#3_Key_Differences_in_Different_Types_of_PVC_Conduit\" >3. Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn PVC kh\u00e1c nhau<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#31_Size_Wall_thickness_of_Different_Types_of_Conduits\" >3.1 K\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh c\u1ee7a c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn kh\u00e1c nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#32_Material_Requirements_ASTM_D1784\" >3.2 Y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u: ASTM D1784<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#33_Usage_Restrictions_and_Temperature_Ratings\" >3.3 H\u1ea1n ch\u1ebf s\u1eed d\u1ee5ng v\u00e0 x\u1ebfp h\u1ea1ng nhi\u1ec7t \u0111\u1ed9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#34_Other_Requirements\" >3.4 C\u00e1c y\u00eau c\u1ea7u kh\u00e1c<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#4_PVC_Conduit_Application_introduce_SCH_40_SCH_80_Type_EB_Type_DB_Type_A\" >4. Gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng \u1ed1ng d\u1eabn PVC: SCH 40, SCH 80, Lo\u1ea1i EB, Lo\u1ea1i DB, Lo\u1ea1i A<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#41_General_Applications_of_PVC_Conduit\" >4.1 C\u00e1c \u1ee9ng d\u1ee5ng chung c\u1ee7a \u1ed1ng d\u1eabn PVC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#42_Differences_in_Specialized_Applications\" >4.2 S\u1ef1 kh\u00e1c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#5_How_to_Choose_Between_SCH_40_SCH_80_Type_DB_Type_EB_and_Type_A\" >5. C\u00e1ch l\u1ef1a ch\u1ecdn gi\u1eefa SCH 40, SCH 80, Lo\u1ea1i DB, Lo\u1ea1i EB v\u00e0 Lo\u1ea1i A<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#51_Mechanical_Strength_and_Durability\" >5.1 \u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 \u0111\u1ed9 ch\u1ecbu l\u1ef1c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#52_Installation_Environment_Underground_vs_Aboveground\" >5.2 M\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t: D\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t so v\u1edbi tr\u00ean m\u1eb7t \u0111\u1ea5t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#53_Cost_and_Budget_Considerations\" >5.3 C\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 chi ph\u00ed v\u00e0 ng\u00e2n s\u00e1ch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#54_Compliance_and_Regulatory_Standards\" >5.4 Ti\u00eau chu\u1ea9n tu\u00e2n th\u1ee7 v\u00e0 quy \u0111\u1ecbnh<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.ctube-gr.com\/vi\/news\/key-differences-in-electrical-conduits-typessch40-vs-sch80-vs-db60-vs-db100-vs-db120-vs-type-a-vs-type-eb.html\/#6_Conclusion\" >6. K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_Introduction\"><\/span>1. Gi\u1edbi thi\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u1ed0ng d\u1eabn \u0111i\u1ec7n b\u1ea3o v\u1ec7 d\u00e2y d\u1eabn kh\u1ecfi h\u01b0 h\u1ea1i do m\u00f4i tr\u01b0\u1eddng, va \u0111\u1eadp v\u1eadt l\u00fd v\u00e0 \u0103n m\u00f2n.<\/p>\n<p>Khi l\u1ef1a ch\u1ecdn \u1ed1ng d\u1eabn \u0111i\u1ec7n, v\u1eadt li\u1ec7u th\u01b0\u1eddng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u1ea7u ti\u00ean ch\u00fang ta xem x\u00e9t. Tuy nhi\u00ean, khi l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1c \u1ed1ng d\u1eabn \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00f9ng m\u1ed9t v\u1eadt li\u1ec7u, tr\u1ecdng t\u00e2m th\u01b0\u1eddng chuy\u1ec3n sang k\u00edch th\u01b0\u1edbc v\u00e0 lo\u1ea1i \u1ed1ng d\u1eabn.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"11_Why_Conduit_Specifications_Matter\"><\/span>1.1 T\u1ea1i sao th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u1ed1ng d\u1eabn \u0111i\u1ec7n l\u1ea1i quan tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt nh\u01b0 SCH40, SCH80, DB60, DB100, DB120, Lo\u1ea1i A v\u00e0 Lo\u1ea1i EB x\u00e1c \u0111\u1ecbnh nh\u1eefng kh\u00e1c bi\u1ec7t quan tr\u1ecdng v\u1ec1 \u0111\u1ed9 d\u00e0y th\u00e0nh, \u0111\u1ed9 b\u1ec1n v\u00e0 t\u00ednh ph\u00f9 h\u1ee3p \u1ee9ng d\u1ee5ng.<\/p>\n<p>C\u00e1c ph\u00e2n lo\u1ea1i n\u00e0y \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh an to\u00e0n (v\u00ed d\u1ee5: Quy chu\u1ea9n \u0111i\u1ec7n qu\u1ed1c gia\u00ae) v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7u su\u1ea5t. C\u00e1c k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3 n\u00e0y \u0111\u01b0\u1ee3c hi\u1ec3u r\u1ed9ng r\u00e3i v\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi \u0111\u1ecdc \u1edf B\u1eafc M\u1ef9 do l\u1ecbch s\u1eed \u00e1p d\u1ee5ng, khung ph\u00e1p l\u00fd v\u00e0 s\u1ef1 s\u1eb5n c\u00f3 c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-10712\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-1024x444.jpg\" alt=\"UL 651 NEMA TC2, 6, 8\" width=\"800\" height=\"347\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-1024x444.jpg 1024w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-300x130.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-768x333.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-1536x666.jpg 1536w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-2048x888.jpg 2048w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-18x8.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/UL-651-NEMA-TC2-6-8-600x260.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"12_Referencing_Key_Standards\"><\/span>1.2 Tham chi\u1ebfu c\u00e1c ti\u00eau chu\u1ea9n ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>B\u00e0i vi\u1ebft n\u00e0y tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh \u0111\u1ec3 l\u00e0m r\u00f5 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u1ed1ng d\u1eabn:<\/p>\n<p><a href=\"https:\/\/www.ul.com\/\" rel=\"nofollow noopener\" target=\"_blank\"><strong>UL 651<\/strong><\/a>Ti\u00eau chu\u1ea9n an to\u00e0n cho \u1ed1ng d\u1eabn v\u00e0 ph\u1ee5 ki\u1ec7n PVC c\u1ee9ng (bao g\u1ed3m SCH40, SCH80, lo\u1ea1i EB v\u00e0 lo\u1ea1i A).<\/p>\n<p><a href=\"https:\/\/www.makeitelectric.org\/\" rel=\"nofollow noopener\" target=\"_blank\"><strong>NEMA<\/strong><\/a><strong> TC 2<\/strong> Ti\u00eau chu\u1ea9n cho \u1ed1ng d\u1eabn \u0111i\u1ec7n b\u1eb1ng polyvinyl clorua (PVC) (tr\u00ean SCH40, SCH80).<\/p>\n<p><strong>NEMA TC 6 &amp; 8<\/strong> Ti\u00eau chu\u1ea9n cho \u1ed1ng d\u1eabn ti\u1ec7n \u00edch b\u1eb1ng nh\u1ef1a Polyvinyl Clorua (PVC) d\u00f9ng cho l\u1eafp \u0111\u1eb7t ng\u1ea7m (\u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i DB60, DB100, DB120, EB20 v\u00e0 EB35).<\/p>\n<p>L\u01b0u \u00fd d\u00e0nh cho ng\u01b0\u1eddi \u0111\u1ecdc: \u0110\u1ec3 bi\u1ebft th\u00f4ng tin chi ti\u1ebft v\u1ec1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, vui l\u00f2ng tham kh\u1ea3o c\u00e1c t\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c:<\/p>\n<p>Mua ch\u1ee9ng ch\u1ec9 UL 651 tr\u1ef1c ti\u1ebfp t\u1eeb UL Solutions.<\/p>\n<p>Truy c\u1eadp NEMA TC 6 &amp; 8-2013 th\u00f4ng qua Hi\u1ec7p h\u1ed9i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb \u0111i\u1ec7n qu\u1ed1c gia (NEMA).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_Understanding_Different_Conduit_Series_SCH_VS_DB_VS_EB_VS_A\"><\/span>2. Hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn kh\u00e1c nhau: SCH VS DB VS EB VS A<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong ph\u00e2n lo\u1ea1i \u1ed1ng d\u1eabn PVC c\u1ee9ng, c\u00e1c lo\u1ea1i SCH, DB, EB v\u00e0 Type A c\u00f3 m\u1ed9t s\u1ed1 \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng nh\u01b0ng c\u0169ng c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang bi\u1ec7t. \u0110\u1ec3 cung c\u1ea5p s\u1ef1 hi\u1ec3u bi\u1ebft r\u00f5 r\u00e0ng, ch\u00fang t\u00f4i s\u1ebd tr\u00ecnh b\u00e0y c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn n\u00e0y m\u1ed9t c\u00e1ch ri\u00eang bi\u1ec7t, n\u00eau b\u1eadt s\u1ef1 kh\u00e1c bi\u1ec7t, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m chung v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a ch\u00fang.<\/p>\n<p>Theo ti\u00eau chu\u1ea9n UL 651, SCH 40, 80, lo\u1ea1i EB (ch\u00f4n trong v\u1ecf b\u1ecdc) v\u00e0 lo\u1ea1i A th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn c\u00f9ng nhau \u0111\u1ec3 so s\u00e1nh, v\u00ec c\u1ea3 hai \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u1eafp \u0111\u1eb7t trong v\u1ecf b\u1ecdc b\u00ea t\u00f4ng nh\u01b0ng kh\u00e1c nhau v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 ph\u1ea1m vi \u1ee9ng d\u1ee5ng. Trong khi \u0111\u00f3, trong ti\u00eau chu\u1ea9n NEMA TC 6 &amp; 8, \u1ed1ng d\u1eabn DB (ch\u00f4n tr\u1ef1c ti\u1ebfp) v\u00e0 EB \u0111\u01b0\u1ee3c so s\u00e1nh, v\u00ec c\u1ea3 hai \u0111\u1ec1u d\u00e0nh cho s\u1eed d\u1ee5ng ng\u1ea7m nh\u01b0ng kh\u00e1c nhau v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p ch\u00f4n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i.<\/p>\n<p>\u0110\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn v\u00e0 gi\u00fap ng\u01b0\u1eddi \u0111\u1ecdc d\u1ec5 theo d\u00f5i h\u01a1n, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch t\u1eebng lo\u1ea1i ri\u00eang bi\u1ec7t trong c\u00e1c ph\u1ea7n ti\u1ebfp theo.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"21_What_Are_Conduit_Schedules\"><\/span>2.1 B\u1ea3ng k\u00ea \u1ed1ng d\u1eabn l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>&quot;Ti\u00eau chu\u1ea9n&quot; (vi\u1ebft t\u1eaft l\u00e0 &quot;Sch&quot;) c\u1ee7a \u1ed1ng d\u1eabn \u0111i\u1ec7n \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng. S\u1ed1 c\u00e0ng l\u1edbn th\u00ec th\u00e0nh \u1ed1ng c\u00e0ng d\u00e0y. V\u00ed d\u1ee5, \u1ed1ng Schedule 80 c\u00f3 th\u00e0nh d\u00e0y h\u01a1n \u1ed1ng Schedule 40, m\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u c\u00f3 c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"22_SCH_40_VS_80_PVC_Conduit\"><\/span>2.2 \u1ed0ng d\u1eabn PVC SCH 40 so v\u1edbi 80<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-pvc-ctube-schedule-40-ong-dien-sch-40-kich-thuoc-12-8-inch-x-10-feet-mau-xam\/\"><strong>\u1ed0ng d\u1eabn \u0111i\u1ec7n SCH 40<\/strong><\/a> \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng th\u01b0\u1eddng tr\u00ean m\u1eb7t \u0111\u1ea5t; c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1eb1ng b\u00ea t\u00f4ng ho\u1eb7c ch\u00f4n tr\u1ef1c ti\u1ebfp. C\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &quot;t\u01b0\u1eddng d\u00e0y&quot;.\u201c<\/p>\n<p><span style=\"color: #003473;\"><strong><a style=\"color: #003473;\" href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-pvc-ctube-schedule-80-ong-dan-sch-80-kich-thuoc-12-8-inch-x-10-feet-mau-xam\/\">\u1ed0ng d\u1eabn \u0111i\u1ec7n SCH 80<\/a><\/strong><\/span> \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i n\u1eb7ng (khu v\u1ef1c ch\u1ecbu t\u00e1c \u0111\u1ed9ng v\u1eadt l\u00fd) tr\u00ean m\u1eb7t \u0111\u1ea5t; c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1eb1ng b\u00ea t\u00f4ng ho\u1eb7c ch\u00f4n tr\u1ef1c ti\u1ebfp. C\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &quot;t\u01b0\u1eddng si\u00eau d\u00e0y&quot;.\u201c<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-10704\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit.jpg\" alt=\"\u1ed1ng d\u1eabn ctube lo\u1ea1i 40 v\u00e0 80\" width=\"800\" height=\"562\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit.jpg 1000w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit-300x211.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit-768x540.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit-18x12.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-schedule-40-and-80-conduit-600x422.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u1ed0ng d\u1eabn PVC c\u1ee9ng Schedule 80 c\u00f3 th\u00e0nh d\u00e0y h\u01a1n Schedule 40, mang l\u1ea1i kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc t\u1ed1t h\u01a1n. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o cho ph\u00e9p s\u1eed d\u1ee5ng Schedule 40, bao g\u1ed3m c\u1ea3 vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u00ean c\u1ed9t theo ti\u00eau chu\u1ea9n NEC (NFPA 70).<\/p>\n<h4><span class=\"ez-toc-section\" id=\"23_What_is_Type_DB_Conduit\"><\/span>2.3 \u1ed0ng d\u1eabn lo\u1ea1i DB l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>H\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn \u0111i\u1ec7n ng\u1ea7m c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111\u00fang c\u00e1ch \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ed9 tin c\u1eady. \u1ed0ng d\u1eabn ch\u00f4n tr\u1ef1c ti\u1ebfp (DB) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u00f4n tr\u1ef1c ti\u1ebfp, lo\u1ea1i b\u1ecf nhu c\u1ea7u b\u1ecdc b\u00ea t\u00f4ng. S\u1ea3n ph\u1ea9m lo\u1ea1i DB c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng b\u1ecdc b\u00ea t\u00f4ng n\u1ebfu c\u00f3 quy \u0111\u1ecbnh.<\/p>\n<p>Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c \u1ed1ng d\u1eabn \u0111i\u1ec7n \u0111\u1ea1t chu\u1ea9n DB \u0111\u1ec1u gi\u1ed1ng nhau\u2014DB60, DB100, v\u00e0 <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-tien-ich-chon-truc-tiep-pvc-cung-ctube-db120\/\"><strong><span style=\"color: #003473;\">DB120<\/span> <\/strong><\/a>Ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean \u0111\u1ed9 d\u00e0y th\u00e0nh, \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111\u1ed9 s\u00e2u ch\u00f4n l\u1ea5p v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ea3i tr\u1ecdng kh\u00e1c nhau.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-10706\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground.jpg\" alt=\"\u1ed0ng d\u1eabn ng\u1ea7m CTUBE-DB2\" width=\"800\" height=\"568\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground.jpg 977w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground-300x213.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground-768x546.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground-18x12.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/CTUBE-DB2-conduit-underground-600x426.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u0110\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 \u0111\u1ed9 b\u1ec1n v\u1eadt li\u1ec7u t\u0103ng l\u00ean khi ch\u1ec9 s\u1ed1 DB t\u0103ng, khi\u1ebfn cho c\u00e1c \u1ed1ng d\u1eabn c\u00f3 ch\u1ec9 s\u1ed1 DB cao h\u01a1n ph\u00f9 h\u1ee3p h\u01a1n cho vi\u1ec7c ch\u00f4n s\u00e2u v\u00e0 ch\u1ecbu t\u1ea3i tr\u1ecdng n\u1eb7ng h\u01a1n.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"24_What_is_Type_EB_Conduit\"><\/span>2.4 \u1ed0ng d\u1eabn lo\u1ea1i EB l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-chon-truc-tiep-kieu-ctube-eb\/\"><span style=\"color: #003473;\"><strong>\u1ed0ng d\u1eabn EB (ch\u00f4n k\u00edn)<\/strong><\/span><\/a> \u0110\u00e2y l\u00e0 lo\u1ea1i \u1ed1ng d\u1eabn PVC \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ch\u00f4n ng\u1ea7m trong b\u00ea t\u00f4ng. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ng\u1ea7m, n\u01a1i c\u1ea7n b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i \u00e1p l\u1ef1c \u0111\u1ea5t v\u00e0 t\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc, \u0111i\u1ec3n h\u00ecnh l\u00e0 lo\u1ea1i EB20 v\u00e0 EB35.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-10707\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit.jpg\" alt=\"\u1ed0ng d\u1eabn ng\u1ea7m Ctube-UL-type EB\" width=\"800\" height=\"527\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit.jpg 1000w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit-300x198.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit-768x506.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit-18x12.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/Ctube-UL-type-EB-underground-conduit-600x395.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"25_What_is_Type_A_Conduit\"><\/span>2.5 \u1ed0ng d\u1eabn lo\u1ea1i A l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-cung-pvc-loai-a\/\"><span style=\"color: #003473;\"><strong>\u1ed0ng d\u1eabn PVC c\u1ee9ng lo\u1ea1i A<\/strong><\/span><\/a> \u0110\u00e2y l\u00e0 lo\u1ea1i \u1ed1ng d\u1eabn \u0111i\u1ec7n c\u00f3 \u0111\u1ed9 b\u1ec1n cao, ch\u1eafc ch\u1eafn, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t kh\u00e1c nhau.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-10705\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit.jpg\" alt=\"\u1ed1ng d\u1eabn PVC lo\u1ea1i A\" width=\"800\" height=\"550\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit.jpg 1000w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit-300x206.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit-768x528.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit-18x12.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/ctube-type-a-pvc-conduit-600x413.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Kh\u00e1c v\u1edbi \u1ed1ng d\u1eabn lo\u1ea1i EB, ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf vi\u1ec7c b\u1ecdc b\u00ea t\u00f4ng trong c\u00e1c r\u00e3nh b\u00ean ngo\u00e0i t\u00f2a nh\u00e0, \u1ed1ng d\u1eabn lo\u1ea1i A c\u00f3 ph\u1ea1m vi \u1ee9ng d\u1ee5ng r\u1ed9ng h\u01a1n, tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c d\u1ef1 \u00e1n c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111i\u1ec7n \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_Key_Differences_in_Different_Types_of_PVC_Conduit\"><\/span>3. Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn PVC kh\u00e1c nhau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h4><span class=\"ez-toc-section\" id=\"31_Size_Wall_thickness_of_Different_Types_of_Conduits\"><\/span>3.1 K\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh c\u1ee7a c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn kh\u00e1c nhau<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<table>\n<tbody>\n<tr>\n<td><strong>K\u00edch th\u01b0\u1edbc \u1ed1ng d\u1eabn th\u01b0\u01a1ng m\u1ea1i<\/strong><\/td>\n<td colspan=\"8\"><strong>\u0110\u1ed9 d\u00e0y th\u00e0nh t\u1ed1i thi\u1ec3u<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td colspan=\"5\"><span style=\"font-weight: 400;\">\u0110\u1ed9 \u0111\u00e0n h\u1ed3i c\u1ef1c nh\u1ecf 400.000 psi<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">inch<\/span><\/td>\n<td><strong>SCH40<\/strong><\/td>\n<td><strong>SCH80<\/strong><\/td>\n<td><strong>DB60<\/strong><\/td>\n<td><strong>DB100<\/strong><\/td>\n<td><strong>DB120<\/strong><\/td>\n<td><strong>EB20<\/strong><\/td>\n<td><strong>EB35<\/strong><\/td>\n<td><strong>Lo\u1ea1i A<\/strong><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">1\/2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.109\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.147\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.080\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">3\/4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.113\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.154\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.080\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.133\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.179\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.060\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.080\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">1-1\/4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.140\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.191\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.090\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">1-1\/2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.145\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.200\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.060\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.065\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.100\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.154\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.218\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.065\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.083\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.060\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.120\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">2-1\/2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.203\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.276\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.130\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>3<\/b><\/td>\n<td><b>0.216\u00a0<\/b><\/td>\n<td><b>0.300\u00a0<\/b><\/td>\n<td><b>0.100\u00a0<\/b><\/td>\n<td><b>0.121\u00a0<\/b><\/td>\n<td><b>0.127\u00a0<\/b><\/td>\n<td><b>0.067\u00a0<\/b><\/td>\n<td><b>0.082\u00a0<\/b><\/td>\n<td><b>0.145\u00a0<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">3-1\/2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.226\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.318\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.115\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.138\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.147\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.078\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.095\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.165\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.237\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.337\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.131\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.155\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.166\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.089\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.109\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.170\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">5<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.258\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.375\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.164\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.192\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.205\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.112\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.136\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">6<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.280\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.432\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.196\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.229\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.244\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.135\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0.164\u00a0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\/<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng c\u00f9ng k\u00edch th\u01b0\u1edbc \u0111\u1ec3 so s\u00e1nh k\u1ebft qu\u1ea3 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng c\u1ee7a c\u00e1c lo\u1ea1i \u1ed1ng kh\u00e1c nhau trong c\u00f9ng m\u1ed9t tr\u01b0\u1eddng h\u1ee3p nh\u01b0 sau: SCH 80 \uff1e SCH 40 \uff1e Lo\u1ea1i A \uff1e DB120 \uff1e DB100\uff1e DB60 \uff1e EB35 \uff1e EB20<\/p>\n<h4><span class=\"ez-toc-section\" id=\"32_Material_Requirements_ASTM_D1784\"><\/span>3.2 Y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u: ASTM D1784<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Ti\u00eau chu\u1ea9n ASTM D1784 thi\u1ebft l\u1eadp h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i cho c\u00e1c h\u1ee3p ch\u1ea5t PVC c\u1ee9ng v\u00e0 CPVC, t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u quan tr\u1ecdng c\u1ea7n thi\u1ebft cho vi\u1ec7c s\u1ea3n xu\u1ea5t \u1ed1ng d\u1eabn.<\/p>\n<p><strong>Lo\u1ea1i nh\u1ef1a c\u01a1 b\u1ea3n<\/strong>\u0110\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc.<\/p>\n<p><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp<\/strong>: \u0110\u1ed9 b\u1ec1n va \u0111\u1eadp t\u1ed1i thi\u1ec3u (v\u00ed d\u1ee5: 12123 bao g\u1ed3m kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp \u22651 ft\u00b7lb\/in).<\/p>\n<p><strong>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/strong>\u00c1p su\u1ea5t t\u1ed1i thi\u1ec3u: 6.500 psi (\u0111\u1ed1i v\u1edbi \u1ed1ng PVC).<\/p>\n<p><strong>M\u00f4\u0111un \u0111\u00e0n h\u1ed3i<\/strong>\u0110\u1ed9 c\u1ee9ng t\u1ed1i thi\u1ec3u: 400.000 psi.<\/p>\n<p><strong>Nhi\u1ec7t \u0111\u1ed9 l\u1ec7ch<\/strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t.<\/p>\n<p><strong>T\u00ednh d\u1ec5 ch\u00e1y<\/strong>Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y.<\/p>\n<p><strong>V\u1eadt li\u1ec7u t\u00e1i ch\u1ebf<\/strong>C\u1ea3 hai ti\u00eau chu\u1ea9n \u0111\u1ec1u cho ph\u00e9p s\u1eed d\u1ee5ng PVC t\u00e1i ch\u1ebf n\u1ebfu ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 c\u01a1 h\u1ecdc v\u00e0 h\u00f3a h\u1ecdc, \u0111\u1ea3m b\u1ea3o t\u00ednh b\u1ec1n v\u1eefng m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"33_Usage_Restrictions_and_Temperature_Ratings\"><\/span>3.3 H\u1ea1n ch\u1ebf s\u1eed d\u1ee5ng v\u00e0 x\u1ebfp h\u1ea1ng nhi\u1ec7t \u0111\u1ed9<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Theo y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c n\u00eau trong ti\u00eau chu\u1ea9n UL 651, ch\u00fang t\u00f4i k\u1ebft lu\u1eadn nh\u01b0 sau.<\/p>\n<p><strong>3.3.1 \u1ed0ng d\u1eabn SCH 40 v\u00e0 80<\/strong><\/p>\n<p>C\u1ea3 \u1ed1ng d\u1eabn Schedule 40 v\u00e0 Schedule 80 \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 xung quanh l\u00ean \u0111\u1ebfn 50\u00b0C (122\u00b0F).<\/p>\n<p>Khi s\u1eed d\u1ee5ng v\u1edbi d\u00e2y d\u1eabn c\u00f3 \u0111i\u1ec7n \u00e1p 75\u00b0C (167\u00b0F), ch\u00fang ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n.<\/p>\n<p>C\u00e1c \u1ed1ng d\u1eabn c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c d\u00e2y d\u1eabn \u1edf nhi\u1ec7t \u0111\u1ed9 90\u00b0C (194\u00b0F) n\u1ebfu ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 c\u1ea5u t\u1ea1o \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n<p><strong>3.3.2 \u1ed0ng d\u1eabn lo\u1ea1i EB v\u00e0 A<\/strong><\/p>\n<p>\u1ed0ng d\u1eabn lo\u1ea1i EB v\u00e0 lo\u1ea1i A th\u00edch h\u1ee3p cho m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 t\u1eeb 50\u00b0C (122\u00b0F) tr\u1edf xu\u1ed1ng.<\/p>\n<p>\u1ed0ng d\u1eabn PVC c\u1ee9ng lo\u1ea1i A h\u1ed7 tr\u1ee3 d\u00e2y d\u1eabn c\u00f3 \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 75\u00b0C (167\u00b0F).<\/p>\n<p>Khi \u0111\u01b0\u1ee3c b\u1ecdc trong b\u00ea t\u00f4ng \u1edf c\u00e1c r\u00e3nh ngo\u00e0i tr\u1eddi, c\u1ea3 lo\u1ea1i A v\u00e0 lo\u1ea1i EB \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi d\u00e2y d\u1eabn c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t l\u00ean \u0111\u1ebfn 90\u00b0C (194\u00b0F).<\/p>\n<p>M\u1eb7c d\u00f9 t\u00e0i li\u1ec7u kh\u00f4ng n\u00eau r\u00f5 ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed1ng d\u1eabn d\u00f2ng DB, nh\u01b0ng gi\u1edbi h\u1ea1n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c suy ra b\u1eb1ng c\u00e1ch so s\u00e1nh v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m t\u01b0\u01a1ng t\u1ef1. Nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t v\u01b0\u1ee3t qu\u00e1 c\u00e1c y\u00eau c\u1ea7u ti\u00eau chu\u1ea9n trong thi\u1ebft k\u1ebf c\u1ee7a h\u1ecd - v\u00ed d\u1ee5, th\u1eed nghi\u1ec7m cho th\u1ea5y \u1ed1ng d\u1eabn PVC c\u1ee7a Ctube c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 th\u1ea5p t\u1edbi -15\u00b0C v\u00e0 cao t\u1edbi 105\u00b0C, ch\u1ee9ng t\u1ecf hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n th\u00f4ng th\u01b0\u1eddng trong ng\u00e0nh.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"34_Other_Requirements\"><\/span>3.4 C\u00e1c y\u00eau c\u1ea7u kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u1ed0ng SCH 40 v\u00e0 80 n\u00ean c\u00f3 m\u00e0u x\u00e1m, v\u00e0 \u1ed1ng d\u1eabn PVC n\u00ean c\u00f3 m\u00e0u x\u00e1m ho\u1eb7c tr\u1eafng. T\u1ea5t c\u1ea3 c\u00e1c \u1ed1ng d\u1eabn kh\u00e1c c\u00f3 th\u1ec3 c\u00f3 m\u00e0u kh\u00e1c v\u00e0 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn n\u1ebfu c\u00e1c b\u00ean li\u00ean quan \u0111\u1ed3ng \u00fd.<\/p>\n<p>\u0110\u1ed9 b\u1ec1n k\u00e9o: 5.000 psi (34,5 MN\/m2)(3,45 kN\/cm2)(3515 gf\/mm2) \u0111\u1ed1i v\u1edbi \u1ed1ng d\u1eabn PVC c\u1ee9ng lo\u1ea1i 40 v\u00e0 80 v\u00e0 4000 lbf\/in2 (27,6 MN\/m2 ho\u1eb7c 2,76 kN\/cm2 ho\u1eb7c 2812 gf\/mm2) \u0111\u1ed1i v\u1edbi \u1ed1ng d\u1eabn PVC c\u1ee9ng lo\u1ea1i A, lo\u1ea1i EB v\u00e0 lo\u1ea1i DB.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_PVC_Conduit_Application_introduce_SCH_40_SCH_80_Type_EB_Type_DB_Type_A\"><\/span>4. Gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng \u1ed1ng d\u1eabn PVC: SCH 40, SCH 80, Lo\u1ea1i EB, Lo\u1ea1i DB, Lo\u1ea1i A<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h4><span class=\"ez-toc-section\" id=\"41_General_Applications_of_PVC_Conduit\"><\/span><strong>4.1 C\u00e1c \u1ee9ng d\u1ee5ng chung c\u1ee7a \u1ed1ng d\u1eabn PVC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>B\u1ea5t k\u1ec3 lo\u1ea1i n\u00e0o, \u1ed1ng d\u1eabn PVC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nh\u00e0 v\u00e0 ngo\u00e0i tr\u1eddi, l\u1eafp \u0111\u1eb7t tr\u00ean m\u1eb7t \u0111\u1ea5t v\u00e0 d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t, c\u0169ng nh\u01b0 c\u00e1c khu v\u1ef1c y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n cao. Vi\u1ec7c l\u1ef1a ch\u1ecdn lo\u1ea1i \u1ed1ng d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp, kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p l\u1ef1c v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-10711\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application.jpg\" alt=\"\u1ee9ng d\u1ee5ng \u1ed1ng d\u1eabn ng\u1ea7m\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application.jpg 1024w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application-300x225.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application-768x576.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application-16x12.jpg 16w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/undergroud-conduit-application-600x450.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>4.1.1 C\u01a1 s\u1edf c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i<\/strong><\/p>\n<p>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n trong nh\u00e0 kho, nh\u00e0 m\u00e1y v\u00e0 c\u00e1c c\u01a1 s\u1edf ch\u1ebf bi\u1ebfn.<\/p>\n<p>Ti\u00eau chu\u1ea9n Schedule 40 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, n\u01a1i c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc \u1edf m\u1ee9c \u0111\u1ed9 v\u1eeba ph\u1ea3i.<\/p>\n<p>Ph\u1ee5 l\u1ee5c 80 \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 r\u1ee7i ro t\u00e1c \u0111\u1ed9ng cao, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t v\u00e0 khu v\u1ef1c th\u01b0\u1eddng xuy\u00ean di chuy\u1ec3n thi\u1ebft b\u1ecb.<\/p>\n<p><strong>4.1.2 Nh\u00e0 \u0111\u1ec3 xe v\u00e0 \u0111\u01b0\u1eddng l\u00e1i xe v\u00e0o nh\u00e0<\/strong><\/p>\n<p>\u0110\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong c\u00e1c b\u00e3i \u0111\u1ed7 xe, \u0111\u01b0\u1eddng h\u1ea7m v\u00e0 \u0111\u01b0\u1eddng d\u1eabn v\u00e0o \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n.<\/p>\n<p>T\u1ea5m Schedule 40 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u1eafp \u0111\u1eb7t tr\u00ean cao ho\u1eb7c g\u1eafn t\u01b0\u1eddng, trong khi<\/p>\n<p>N\u00ean s\u1eed d\u1ee5ng lo\u1ea1i v\u1eadt li\u1ec7u Schedule 80 cho c\u00e1c v\u1ecb tr\u00ed \u0111\u1eb7t \u1edf m\u1eb7t \u0111\u1ea5t ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a xe c\u1ed9.<\/p>\n<p><strong>4.1.3 Khu v\u1ef1c \u0103n m\u00f2n v\u00e0 nguy hi\u1ec3m<\/strong><\/p>\n<p>\u1ed0ng d\u1eabn PVC r\u1ea5t l\u00fd t\u01b0\u1edfng cho c\u00e1c tr\u1ea1m x\u0103ng, nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u v\u00e0 c\u00e1c c\u00f4ng tr\u00ecnh ven bi\u1ec3n, nh\u1edd kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, \u1ea9m \u01b0\u1edbt v\u00e0 h\u00f3a ch\u1ea5t.<br \/>\nTrong c\u00e1c khu v\u1ef1c nguy hi\u1ec3m (nh\u01b0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong \u0110i\u1ec1u 352.10 c\u1ee7a NEC), c\u1ea7n s\u1eed d\u1ee5ng th\u00e9p Schedule 80 \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c va \u0111\u1eadp \u1edf nh\u1eefng khu v\u1ef1c ti\u1ebfp x\u00fac v\u1edbi kh\u00ed v\u00e0 h\u01a1i d\u1ec5 ch\u00e1y.<\/p>\n<p><strong>4.1.4 C\u00e1c c\u00f4ng tr\u00ecnh ng\u1ea7m<\/strong><\/p>\n<p>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng l\u01b0\u1edbi ti\u1ec7n \u00edch, giao l\u1ed9 \u0111\u01b0\u1eddng b\u1ed9 v\u00e0 khu v\u1ef1c giao th\u00f4ng \u0111\u00f4ng \u0111\u00fac \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n ng\u1ea7m.<\/p>\n<p>\u1ed0ng d\u1eabn lo\u1ea1i DB v\u00e0 lo\u1ea1i EB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng ng\u1ea7m, trong \u0111\u00f3 lo\u1ea1i DB th\u00edch h\u1ee3p \u0111\u1ec3 ch\u00f4n tr\u1ef1c ti\u1ebfp v\u00e0 lo\u1ea1i EB c\u1ea7n \u0111\u01b0\u1ee3c b\u1ecdc b\u00ea t\u00f4ng \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n k\u1ebft c\u1ea5u.<\/p>\n<p>T\u1ea1i c\u00e1c khu v\u1ef1c ch\u1ecbu \u00e1p su\u1ea5t cao, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u01b0\u1edbi \u0111\u01b0\u1eddng cao t\u1ed1c ho\u1eb7c \u0111\u01b0\u1eddng b\u0103ng s\u00e2n bay, \u1ed1ng d\u1eabn lo\u1ea1i Schedule 80 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u0103ng th\u00eam \u0111\u1ed9 b\u1ec1n, trong khi \u1ed1ng d\u1eabn lo\u1ea1i A \u0111\u01b0\u1ee3c \u01b0u ti\u00ean khi c\u1ea7n \u0111\u1ed9 b\u1ec1n c\u1ef1c cao trong c\u00e1c c\u1ea5u tr\u00fac b\u00ea t\u00f4ng.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"42_Differences_in_Specialized_Applications\"><\/span>4.2 S\u1ef1 kh\u00e1c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>M\u1eb7c d\u00f9 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i \u1ed1ng d\u1eabn PVC \u0111\u1ec1u c\u00f3 nh\u1eefng \u1ee9ng d\u1ee5ng chung, nh\u01b0ng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf y\u00eau c\u1ea7u v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u00f4n l\u1ea5p:<\/p>\n<p><strong>4.2.1 Ph\u1ee5 l\u1ee5c 40 so v\u1edbi Ph\u1ee5 l\u1ee5c 80<\/strong><\/p>\n<p>C\u1ea3 hai \u0111\u1ec1u ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u1ed1ng d\u1eabn \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>\u1ed0ng Schedule 40 c\u00f3 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t ti\u00eau chu\u1ea9n.<\/p>\n<p>Th\u00e9p Schedule 80 c\u00f3 \u0111\u1ed9 d\u00e0y th\u00e0nh l\u1edbn h\u01a1n v\u00e0 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 r\u1ee7i ro cao v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c va \u0111\u1eadp ho\u1eb7c l\u1ef1c \u00e9p.<\/p>\n<p><strong>4.2.2 So s\u00e1nh lo\u1ea1i DB v\u00e0 lo\u1ea1i EB<\/strong><\/p>\n<p>Lo\u1ea1i DB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u00f4n tr\u1ef1c ti\u1ebfp, lo\u1ea1i b\u1ecf nhu c\u1ea7u b\u1ecdc b\u00ea t\u00f4ng. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u00f4n trong l\u1edbp b\u1ecdc b\u00ea t\u00f4ng.<\/p>\n<p>Lo\u1ea1i EB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng trong c\u00e1c d\u00e3y \u1ed1ng d\u1eabn \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1eb1ng b\u00ea t\u00f4ng trong c\u00e1c d\u1ef1 \u00e1n th\u01b0\u01a1ng m\u1ea1i v\u00e0 \u0111\u00f4 th\u1ecb.<\/p>\n<p><strong>4.2.3 \u1ed0ng d\u1eabn lo\u1ea1i A<\/strong><\/p>\n<p>Cung c\u1ea5p \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi ng\u1ea7m ch\u1ecbu t\u1ea3i tr\u1ecdng cao, bao g\u1ed3m h\u1ed1 ga, h\u1ea7m ti\u1ec7n \u00edch v\u00e0 c\u00e1c t\u1ea5m b\u00ea t\u00f4ng c\u1ed1t th\u00e9p.<br \/>\nTh\u00edch h\u1ee3p cho nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi cao.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_How_to_Choose_Between_SCH_40_SCH_80_Type_DB_Type_EB_and_Type_A\"><\/span>5. C\u00e1ch l\u1ef1a ch\u1ecdn gi\u1eefa SCH 40, SCH 80, Lo\u1ea1i DB, Lo\u1ea1i EB v\u00e0 Lo\u1ea1i A<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi l\u1ef1a ch\u1ecdn \u1ed1ng d\u1eabn PVC ph\u00f9 h\u1ee3p cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n, c\u1ea7n xem x\u00e9t m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 nh\u01b0 chi ph\u00ed, \u0111\u1ed9 b\u1ec1n, m\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t v\u00e0 s\u1ef1 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-10708\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-1024x574.jpeg\" alt=\"C\u00e1ch l\u1ef1a ch\u1ecdn gi\u1eefa SCH 40, SCH 80, Lo\u1ea1i DB, Lo\u1ea1i EB v\u00e0 Lo\u1ea1i A\" width=\"800\" height=\"448\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-1024x574.jpeg 1024w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-300x168.jpeg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-768x431.jpeg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-18x10.jpeg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A-600x337.jpeg 600w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/How-to-Choose-Between-SCH-40-SCH-80-Type-DB-Type-EB-and-Type-A.jpeg 1312w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"51_Mechanical_Strength_and_Durability\"><\/span>5.1 \u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 \u0111\u1ed9 ch\u1ecbu l\u1ef1c<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>SCH 80 l\u00e0 l\u1ef1a ch\u1ecdn b\u1ec1n nh\u1ea5t v\u1edbi th\u00e0nh \u1ed1ng d\u00e0y h\u01a1n, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp v\u01b0\u1ee3t tr\u1ed9i. Lo\u1ea1i \u1ed1ng n\u00e0y \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 r\u1ee7i ro cao, n\u01a1i \u1ed1ng d\u1eabn c\u00f3 th\u1ec3 ph\u1ea3i ch\u1ecbu t\u00e1c \u0111\u1ed9ng v\u1eadt l\u00fd ho\u1eb7c va \u0111\u1eadp m\u1ea1nh.<\/p>\n<p>\u1ed0ng SCH 40, tuy v\u1eabn b\u1ec1n, nh\u01b0ng c\u00f3 th\u00e0nh m\u1ecfng h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp k\u00e9m h\u01a1n so v\u1edbi SCH 80, do \u0111\u00f3 ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng tr\u00ecnh s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng kh\u00f4ng y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc cao.<\/p>\n<p>Lo\u1ea1i A c\u00f3 \u0111\u1ed9 b\u1ec1n v\u1eeba ph\u1ea3i v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1eadt l\u00fd c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1edfi b\u00ea t\u00f4ng, do \u0111\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng tr\u00ecnh ng\u1ea7m c\u1ea7n s\u1ef1 h\u1ed7 tr\u1ee3 b\u1ed5 sung t\u1eeb b\u00ea t\u00f4ng xung quanh.<\/p>\n<p>Lo\u1ea1i DB v\u00e0 lo\u1ea1i EB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng ng\u1ea7m v\u00e0 c\u00f3 \u0111\u1ed9 b\u1ec1n ph\u00f9 h\u1ee3p. Lo\u1ea1i DB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u00f4n tr\u1ef1c ti\u1ebfp, trong khi lo\u1ea1i EB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 \u1ed1ng d\u1eabn \u0111\u01b0\u1ee3c nh\u00fang trong b\u00ea t\u00f4ng, gi\u00fap b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c t\u00e1c \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"52_Installation_Environment_Underground_vs_Aboveground\"><\/span>5.2 M\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t: D\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t so v\u1edbi tr\u00ean m\u1eb7t \u0111\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>L\u1eafp \u0111\u1eb7t tr\u00ean m\u1eb7t \u0111\u1ea5t: C\u1ea3 SCH 40 v\u00e0 SCH 80 \u0111\u1ec1u l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng tr\u00ean m\u1eb7t \u0111\u1ea5t, trong \u0111\u00f3 SCH 80 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean s\u1eed d\u1ee5ng \u1edf nh\u1eefng khu v\u1ef1c ch\u1ecbu \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc cao.<\/p>\n<p>L\u1eafp \u0111\u1eb7t ng\u1ea7m: Lo\u1ea1i DB v\u00e0 lo\u1ea1i EB ph\u00f9 h\u1ee3p h\u01a1n cho vi\u1ec7c s\u1eed d\u1ee5ng ng\u1ea7m. Lo\u1ea1i DB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u00f4n tr\u1ef1c ti\u1ebfp, c\u00f2n lo\u1ea1i EB cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n khi \u0111\u01b0\u1ee3c b\u1ecdc trong b\u00ea t\u00f4ng. Tuy nhi\u00ean, SCH 40 v\u00e0 SCH 80 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ng\u1ea7m \u1edf nh\u1eefng khu v\u1ef1c ch\u1ecbu t\u00e1c \u0111\u1ed9ng m\u1ea1nh, n\u01a1i c\u1ea7n \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc cao h\u01a1n.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"53_Cost_and_Budget_Considerations\"><\/span>5.3 C\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 chi ph\u00ed v\u00e0 ng\u00e2n s\u00e1ch<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u1ed0ng SCH 80 th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u1eaft nh\u1ea5t do th\u00e0nh \u1ed1ng d\u00e0y h\u01a1n v\u00e0 \u0111\u1ed9 b\u1ec1n cao h\u01a1n, n\u00ean l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t cho m\u00f4i tr\u01b0\u1eddng c\u00f3 r\u1ee7i ro cao v\u00e0 t\u00e1c \u0111\u1ed9ng m\u1ea1nh. \u1ed0ng SCH 40 c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n SCH 80, l\u00e0 gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t th\u00f4ng th\u01b0\u1eddng. C\u00e1c lo\u1ea1i DB, EB v\u00e0 A l\u00e0 l\u1ef1a ch\u1ecdn ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c \u1ee9ng d\u1ee5ng ng\u1ea7m.<\/p>\n<p>Gi\u00e1 c\u1ee5 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c tham kh\u1ea3o v\u1edbi nh\u00e0 cung c\u1ea5p. V\u00e0 c\u1ea7n l\u01b0u \u00fd r\u1eb1ng, do tr\u1ecdng l\u01b0\u1ee3ng kh\u00e1c nhau, th\u1eddi gian v\u00e0 chi ph\u00ed v\u1eadn chuy\u1ec3n c\u0169ng nh\u01b0 nh\u00e2n c\u00f4ng l\u1eafp \u0111\u1eb7t c\u00f3 th\u1ec3 thay \u0111\u1ed5i.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"54_Compliance_and_Regulatory_Standards\"><\/span>5.4 Ti\u00eau chu\u1ea9n tu\u00e2n th\u1ee7 v\u00e0 quy \u0111\u1ecbnh<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Khi l\u1ef1a ch\u1ecdn \u1ed1ng d\u1eabn PVC, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan nh\u01b0 NEC (B\u1ed9 lu\u1eadt \u0110i\u1ec7n qu\u1ed1c gia), quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t. Ngo\u00e0i ra, c\u00e1c quy \u0111\u1ecbnh x\u00e2y d\u1ef1ng \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 c\u00e1c quy \u0111\u1ecbnh t\u1eeb c\u00e1c c\u01a1 quan nh\u01b0 OSHA v\u00e0 EPA c\u00f3 th\u1ec3 \u0111\u01b0a ra c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1eafp \u0111\u1eb7t trong m\u00f4i tr\u01b0\u1eddng nguy hi\u1ec3m. Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o an to\u00e0n, hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6_Conclusion\"><\/span>6. K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u00f3m l\u1ea1i, kh\u00f4ng c\u00f3 l\u1ef1a ch\u1ecdn n\u00e0o l\u00e0 \u201ct\u1ed1t nh\u1ea5t\u201d khi ch\u1ecdn \u1ed1ng d\u1eabn \u0111i\u1ec7n. Lo\u1ea1i \u1ed1ng d\u1eabn ph\u00f9 h\u1ee3p nh\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t, ng\u00e2n s\u00e1ch v\u00e0 vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n v\u00e0 quy \u0111\u1ecbnh li\u00ean quan. \u0110i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 ch\u1eafc ch\u1eafn v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed1ng d\u1eabn \u0111\u00e1p \u1ee9ng t\u1ed1i \u0111a y\u00eau c\u1ea7u an to\u00e0n v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-10710\" src=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-1024x606.jpg\" alt=\"S\u1ea3n xu\u1ea5t \u1ed1ng d\u1eabn PVC - Ctube\" width=\"800\" height=\"473\" srcset=\"https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-1024x606.jpg 1024w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-300x178.jpg 300w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-768x454.jpg 768w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-1536x909.jpg 1536w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-18x12.jpg 18w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube-600x355.jpg 600w, https:\/\/www.ctube-gr.com\/wp-content\/uploads\/2025\/03\/pvc-conduit-manufacture-Ctube.jpg 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><span style=\"color: #003473;\"><strong><a style=\"color: #003473;\" href=\"https:\/\/www.ctube-gr.com\/vi\/\">Ctube<\/a><\/strong><\/span> L\u00e0 nh\u00e0 cung c\u1ea5p \u1ed1ng d\u1eabn \u0111i\u1ec7n, ch\u00fang t\u00f4i cung c\u1ea5p nhi\u1ec1u lo\u1ea1i \u1ed1ng d\u1eabn PVC ch\u1ea5t l\u01b0\u1ee3ng cao, bao g\u1ed3m: <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-pvc-ctube-schedule-40-ong-dien-sch-40-kich-thuoc-12-8-inch-x-10-feet-mau-xam\/\"><strong><span style=\"color: #003473;\">Ph\u1ee5 l\u1ee5c 40<\/span><\/strong><\/a>, <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-pvc-ctube-schedule-80-ong-dan-sch-80-kich-thuoc-12-8-inch-x-10-feet-mau-xam\/\"><span style=\"color: #003473;\"><strong>Ph\u1ee5 l\u1ee5c 80<\/strong><\/span><\/a>, <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-pvc-cung-loai-db2-es2-csa\/\"><span style=\"color: #003473;\"><strong>Lo\u1ea1i DB<\/strong><\/span><\/a>, <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-chon-truc-tiep-kieu-ctube-eb\/\"><span style=\"color: #003473;\"><strong>Lo\u1ea1i EB<\/strong><\/span><\/a>, V\u00e0 <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-dien-cung-pvc-loai-a\/\"><span style=\"color: #003473;\"><strong>Lo\u1ea1i A<\/strong><\/span><\/a>, \u0110\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u \u0111a d\u1ea1ng c\u1ee7a c\u00e1c d\u1ef1 \u00e1n. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p chuy\u00ean bi\u1ec7t nh\u01b0:<a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-va-phu-kien-it-khoi-khong-chua-halogen\/\"> <strong><span style=\"color: #003473;\">LSZH (\u00cdt kh\u00f3i, kh\u00f4ng halogen)<\/span><\/strong><\/a> \u1ed1ng d\u1eabn d\u00f9ng cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u an to\u00e0n ch\u00e1y n\u1ed5 v\u00e0 \u0111\u1ed9c t\u00ednh t\u1ed1i thi\u1ec3u trong tr\u01b0\u1eddng h\u1ee3p h\u1ecfa ho\u1ea1n, v\u00e0 <a href=\"https:\/\/www.ctube-gr.com\/vi\/ong-dan-va-phu-kien-pvc-nang-luong-mat-troi\/\"><span style=\"color: #003473;\"><strong>UPVC n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/strong> <\/span><\/a>\u1ed0ng d\u1eabn \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh cho h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng tia UV v\u00e0 \u0111\u1ed9 b\u1ec1n cao h\u01a1n khi s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi.<\/p>\n<p>T\u1ea5t c\u1ea3 s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec1u \u0111\u01b0\u1ee3c ki\u1ec3m tra nghi\u00eam ng\u1eb7t \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau. N\u1ebfu b\u1ea1n quan t\u00e2m \u0111\u1ebfn vi\u1ec7c t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i ho\u1eb7c nh\u1eadn b\u00e1o gi\u00e1, vui l\u00f2ng li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i! C\u1ea3m \u01a1n b\u1ea1n \u0111\u00e3 \u0111\u1ecdc v\u00e0 ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng v\u1edbi c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p>","protected":false},"excerpt":{"rendered":"<p>1. Introduction Electrical conduits protect wiring from environmental damage, physical impact, and corrosion. When selecting an electrical conduit, material is often one of the first factors we consider. However, when we&#8217;re choosing between conduits made from the same material, the focus usually shifts to the size and type of the conduit. 1.1 Why Conduit Specifications [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10781,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","_joinchat":[],"footnotes":""},"categories":[351,18,143],"tags":[149,130,278,279,221],"class_list":["post-10703","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electrical-conduit-systems","category-company-news","category-industry-news","tag-electrical-conduit","tag-pvc-conduit","tag-schedule-40","tag-schedule-80","tag-underground-conduit"],"_links":{"self":[{"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/posts\/10703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/comments?post=10703"}],"version-history":[{"count":1,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/posts\/10703\/revisions"}],"predecessor-version":[{"id":14354,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/posts\/10703\/revisions\/14354"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/media\/10781"}],"wp:attachment":[{"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/media?parent=10703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/categories?post=10703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ctube-gr.com\/vi\/wp-json\/wp\/v2\/tags?post=10703"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}