{"id":860,"date":"2025-07-09T06:29:38","date_gmt":"2025-07-09T06:29:38","guid":{"rendered":"https:\/\/lzbmetal.com\/?p=860"},"modified":"2025-07-09T06:29:43","modified_gmt":"2025-07-09T06:29:43","slug":"nap-ho-ga-vuong-hai-la-bang-gang-deo","status":"publish","type":"post","link":"https:\/\/lzbmetal.com\/vi\/nap-ho-ga-vuong-hai-la-bang-gang-deo\/","title":{"rendered":"N\u1eafp h\u1ed1 ga vu\u00f4ng hai l\u00e1 b\u1eb1ng gang d\u1ebbo 500\u00d71000\u00d750"},"content":{"rendered":"<h3 class=\"wp-block-heading\">I. Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u<\/h3>\n\n\n\n<p>1. K\u00edch th\u01b0\u1edbc &amp; V\u1eadt li\u1ec7u<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u00ecnh ch\u1eef nh\u1eadt 500\u00d71000mm ph\u00f9 h\u1ee3p v\u1edbi h\u1ed1 ti\u1ebfp c\u1eadn \u0111\u01b0\u1eddng \u1ed1ng, bu\u1ed3ng \u0111o v\u00e0 h\u1ea7m vi\u1ec5n th\u00f4ng\u2014l\u00fd t\u01b0\u1edfng cho thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh theo chi\u1ec1u ngang.<\/li>\n\n\n\n<li>\u0110\u1ed9 d\u00e0y 50mm \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i trong khi v\u1eabn gi\u1eef tr\u1ecdng l\u01b0\u1ee3ng \u224860kg (c\u00f3 th\u1ec3 v\u1eadn h\u00e0nh b\u1edfi hai c\u00f4ng nh\u00e2n).<\/li>\n\n\n\n<li>V\u1eadt li\u1ec7u: Gang d\u1ebbo (QT500-7) c\u00f3 than ch\u00ec h\u00ecnh c\u1ea7u; \u0111\u1ed9 b\u1ec1n k\u00e9o \u2265420MPa, \u0111\u1ed9 gi\u00e3n d\u00e0i \u22657%.<\/li>\n\n\n\n<li>30% nh\u1eb9 h\u01a1n gang x\u00e1m nh\u01b0ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i.<\/li>\n<\/ul>\n\n\n\n<p>2. Hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n c\u1ee7a l\u00e1 k\u00e9p<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u1ea5u tr\u00fac l\u00e1 chia b\u1ea3n l\u1ec1: M\u1edf d\u1ecdc theo \u0111i\u1ec3m gi\u1eefa tr\u1ee5c d\u00e0i; ho\u1ea1t \u0111\u1ed9ng m\u1ed9t l\u00e1 (\u224830kg) cho ph\u00e9p ti\u1ebfp c\u1eadn m\u1ed9t ph\u1ea7n trong khi c\u1ed1 \u0111\u1ecbnh n\u1eeda c\u00f2n l\u1ea1i.<\/li>\n\n\n\n<li>Ch\u1ed1t ch\u1ed1ng tr\u1ed9m \u1ea9n: Kh\u00f3a l\u00f2 xo \u0111\u00f2i h\u1ecfi nh\u1eefng c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng, ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng b\u1eb1ng x\u00e0 beng.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"644\" src=\"https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-1024x644.jpg\" alt=\"\" class=\"wp-image-862\" srcset=\"https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-1024x644.jpg 1024w, https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-300x189.jpg 300w, https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-768x483.jpg 768w, https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-1536x965.jpg 1536w, https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-2048x1287.jpg 2048w, https:\/\/lzbmetal.com\/wp-content\/uploads\/2025\/07\/\u94f8\u94c1\u65b9\u4e95500x1000x50\u53cc\u5f00-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">II. V\u1eadt li\u1ec7u &amp; Hi\u1ec7u su\u1ea5t<\/h3>\n\n\n\n<p>1. Gang d\u1ebbo c\u01b0\u1eddng \u0111\u1ed9 cao (QT500-7)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed9 b\u1ec1n k\u00e9o \u2265500MPa, \u0111\u1ed9 gi\u00e3n d\u00e0i \u22657%; t\u1ea3i tr\u1ecdng \u0111\u1ecbnh m\u1ee9c D400 (40 t\u1ea5n).<\/li>\n\n\n\n<li>Bi\u1ebfn d\u1ea1ng d\u1ebbo (kh\u00f4ng ph\u1ea3i g\u00e3y gi\u00f2n) khi qu\u00e1 t\u1ea3i.<\/li>\n\n\n\n<li>Bi\u1ebfn d\u1ea1ng &lt;0,2mm sau 200 ngh\u00ecn l\u1ea7n th\u1eed t\u1ea3i tr\u1ecdng tu\u1ea7n ho\u00e0n\u2014th\u00edch h\u1ee3p cho \u0111\u01b0\u1eddng d\u00e2n d\u1ee5ng v\u00e0 khu c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n\n\n\n<p>2. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n l\u00e2u d\u00e0i<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L\u1edbp ph\u1ee7 epoxy-k\u1ebdm ch\u1ecbu \u0111\u01b0\u1ee3c 300 gi\u1edd phun mu\u1ed1i, m\u01b0a axit, ch\u1ea5t ph\u00e1 b\u0103ng v\u00e0 H\u2082S.<\/li>\n\n\n\n<li>Tu\u1ed5i th\u1ecd &gt;30 n\u0103m; \u1ed5n \u0111\u1ecbnh t\u1eeb 50\u00b0C \u0111\u1ebfn 150\u00b0C (kh\u00f4ng gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p\/r\u00e3 \u0111\u00f4ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao).<\/li>\n<\/ul>\n\n\n\n<p>3. An to\u00e0n v\u1ed1n c\u00f3<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>G\u1edd ch\u1ed1ng tr\u01b0\u1ee3t (cao 3mm; h\u1ec7 s\u1ed1 ma s\u00e1t 0,85)\u201430% v\u01b0\u1ee3t ti\u00eau chu\u1ea9n qu\u1ed1c gia.<\/li>\n\n\n\n<li>An to\u00e0n ch\u1ed1ng r\u01a1i k\u00e9p: Kh\u00f3a li\u00ean \u0111\u1ed9ng c\u01a1 h\u1ecdc ng\u0103n ch\u1eb7n vi\u1ec7c th\u00e1o r\u1eddi ho\u00e0n to\u00e0n ngay c\u1ea3 khi \u0111\u00e3 m\u1edf kh\u00f3a.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">III. L\u1eafp \u0111\u1eb7t &amp; B\u1ea3o tr\u00ec<\/h3>\n\n\n\n<p>1.C\u00e0i \u0111\u1eb7t quan tr\u1ecdng<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Neo ch\u1ed1ng d\u1ecbch chuy\u1ec3n: Bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao M16 c\u1ed1 \u0111\u1ecbnh c\u00e1c g\u00f3c khung v\u00e0o n\u1ec1n b\u00ea t\u00f4ng.<\/li>\n\n\n\n<li>\u0110\u1ed9 k\u00edn n\u01b0\u1edbc: Gio\u0103ng cao su EPDM ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a n\u01b0\u1edbc m\u01b0a.<\/li>\n<\/ul>\n\n\n\n<p>2. Giao th\u1ee9c b\u1ea3o tr\u00ec<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u1ec7 sinh r\u00e3nh b\u1ea3n l\u1ec1 hai l\u1ea7n m\u1ed9t n\u0103m (ng\u0103n ng\u1eeba k\u1eb9t).<\/li>\n\n\n\n<li>Ki\u1ec3m tra gio\u0103ng cao su \u1edf n\u01a1i c\u00f3 kh\u00ed h\u1eadu \u0111\u00f3ng b\u0103ng; thay th\u1ebf n\u1ebfu b\u1ecb c\u1ee9ng.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">IV. C\u00e1c \u1ee9ng d\u1ee5ng ch\u00ednh<\/h3>\n\n\n\n<p>T\u1ee7 \u0111\u1ef1ng \u0111\u1ed3 d\u00f9ng: C\u00f3 hai c\u00e1nh \u0111\u1ec3 ti\u1ebfp c\u1eadn c\u00e1c m\u1ed1i n\u1ed1i c\u00e1p; c\u00e1ch \u0111i\u1ec7n.<\/p>\n\n\n\n<p>\u0110\u01b0\u1eddng d\u00e2n d\u1ee5ng\/c\u00f4ng nghi\u1ec7p: C\u1ea5p D400 d\u00e0nh cho xe c\u1ee9u h\u1ecfa v\u00e0 xe ch\u1edf r\u00e1c.<\/p>\n\n\n\n<p>M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n: Nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ven bi\u1ec3n.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ea7n k\u1ebft lu\u1eadn<\/h3>\n\n\n\n<p>V\u1ecf b\u1ecdc gang d\u1ebbo 500\u00d71000\u00d750 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o m\u1eadt ch\u1ed1ng tr\u1ed9m ba l\u1edbp, t\u1eadn d\u1ee5ng \u0111\u1ed9 b\u1ec1n v\u00e0 thi\u1ebft k\u1ebf ch\u1ed1ng l\u00fan c\u1ee7a QT500-7 \u0111\u1ec3 c\u00f3 hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i. H\u1ec7 th\u1ed1ng l\u00e1 k\u00e9p c\u1ee7a n\u00f3 gi\u00fap t\u0103ng hi\u1ec7u qu\u1ea3 b\u1ea3o tr\u00ec, trong khi k\u1ebft c\u1ea5u gia c\u1ed1 50mm v\u00e0 l\u1edbp ph\u1ee7 epoxy \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n ch\u1ecbu t\u1ea3i n\u1eb7ng\u2014l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho l\u01b0\u1edbi \u0111i\u1ec7n th\u00e0nh ph\u1ed1, \u0111\u01b0\u1eddng \u1ed1ng d\u00e2n d\u1ee5ng v\u00e0 c\u00e1c khu v\u1ef1c c\u00f3 l\u01b0u l\u01b0\u1ee3ng giao th\u00f4ng trung b\u00ecnh, n\u01a1i an to\u00e0n, ti\u1ebft ki\u1ec7m v\u00e0 b\u1ea3o tr\u00ec th\u00f4ng minh h\u1ed9i t\u1ee5.<\/p>","protected":false},"excerpt":{"rendered":"<p>I. Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u 1. K\u00edch th\u01b0\u1edbc &amp; V\u1eadt li\u1ec7u 2. Hi\u1ec7u qu\u1ea3 &amp; An to\u00e0n c\u1ee7a c\u1ea7u thang \u0111\u00f4i II. V\u1eadt li\u1ec7u &amp; Hi\u1ec7u su\u1ea5t 1. Gang d\u1ebbo c\u01b0\u1eddng \u0111\u1ed9 cao (QT500-7) 2. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n l\u00e2u d\u00e0i 3. An to\u00e0n v\u1ed1n c\u00f3 III. L\u1eafp \u0111\u1eb7t &amp; B\u1ea3o tr\u00ec 1. L\u1eafp \u0111\u1eb7t quan tr\u1ecdng 2. Quy tr\u00ecnh b\u1ea3o tr\u00ec IV. \u1ee8ng d\u1ee5ng ch\u00ednh H\u1ea7m ti\u1ec7n \u00edch: L\u1ed1i v\u00e0o c\u1ea7u thang \u0111\u00f4i cho c\u00e1c m\u1ed1i n\u1ed1i c\u00e1p; c\u00e1ch \u0111i\u1ec7n. \u0110\u01b0\u1eddng d\u00e2n d\u1ee5ng\/c\u00f4ng nghi\u1ec7p: C\u1ea5p D400 ph\u00f9 h\u1ee3p cho xe c\u1ee9u h\u1ecfa v\u00e0 xe ch\u1edf r\u00e1c. M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n: [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,44,2,43],"tags":[126,63],"class_list":["post-860","post","type-post","status-publish","format-standard","hentry","category-ductile-cast-iron-products","category-multi-opening-sqaure-manhole-cover","category-products","category-square-manhole-cover","tag-ductile-cast-iron","tag-manhole-cover"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>500\u00d71000\u00d750 Ductile Cast Iron\u00a0Double-Leaf Square Manhole Cover Ductile Cast Iron - LZBMetal Products Co., Ltd<\/title>\n<meta name=\"description\" content=\"500\u00d71000\u00d750 Ductile Cast Iron\u00a0Double-Leaf Square Cover exemplifies the balance between efficiency and safety. 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Leveraging Ductile Cast Iron\u2019s resilience and a dual-access design, it solves frequent maintenance challenges while its 30-year maintenance-free operation reduces municipal burdens. 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