{"id":514,"date":"2025-05-13T07:10:01","date_gmt":"2025-05-13T07:10:01","guid":{"rendered":"https:\/\/lzbmetal.com\/?p=514"},"modified":"2025-06-06T06:39:50","modified_gmt":"2025-06-06T06:39:50","slug":"nap-ho-ga-tron-tieu-chuan-bang-gang-deo","status":"publish","type":"post","link":"https:\/\/lzbmetal.com\/vi\/nap-ho-ga-tron-tieu-chuan-bang-gang-deo\/","title":{"rendered":"N\u1eafp h\u1ed1 ga tr\u00f2n ti\u00eau chu\u1ea9n b\u1eb1ng gang d\u1ebbo \u00a0"},"content":{"rendered":"<p><strong>N\u1eafp h\u1ed1 ga tr\u00f2n ti\u00eau chu\u1ea9n b\u1eb1ng gang d\u1ebbo - Thi\u1ebft k\u1ebf b\u1ec1n ch\u1eafc, ch\u1eafc ch\u1eafn v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p><strong>\u00a0I. Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C\u1ea5u tr\u00fac h\u00ecnh tr\u00f2n:<\/strong> \u0110\u1ea3m b\u1ea3o ph\u00e2n b\u1ed5 \u1ee9ng su\u1ea5t \u0111\u1ed3ng \u0111\u1ec1u, gi\u1ea3m thi\u1ec3u nguy c\u01a1 bi\u1ebfn d\u1ea1ng ho\u1eb7c g\u00e3y x\u01b0\u01a1ng do t\u1ea3i tr\u1ecdng xe g\u00e2y ra. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thi\u1ebft k\u1ebf ch\u1ed1ng d\u1ecbch chuy\u1ec3n:<\/strong> S\u1eed d\u1ee5ng c\u00e1c k\u1ebft n\u1ed1i b\u1ea3n l\u1ec1 ho\u1eb7c c\u01a1 ch\u1ebf kh\u00f3a ba \u0111i\u1ec3m (v\u00ed d\u1ee5: kh\u00f3a l\u00f2 xo, bu l\u00f4ng ch\u1ed1ng tr\u1ed9m) \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c n\u1eafp b\u1ecb d\u1ecbch chuy\u1ec3n ho\u1eb7c tr\u1ed9m c\u1eafp. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>X\u1eed l\u00fd ch\u1ed1ng tr\u01b0\u1ee3t: <\/strong>B\u1ec1 m\u1eb7t c\u00f3 c\u00e1c r\u00e3nh ch\u00e9o, h\u1ecda ti\u1ebft v\u1ea3y c\u00e1 ho\u1eb7c c\u00e1c ch\u1ea5m n\u1ed5i, \u0111\u1ea1t h\u1ec7 s\u1ed1 ma s\u00e1t \u22650,6 gi\u00fap ch\u1ed1ng tr\u01b0\u1ee3t v\u01b0\u1ee3t tr\u1ed9i khi tr\u1eddi m\u01b0a ho\u1eb7c tuy\u1ebft. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0110\u00e1nh d\u1ea5u t\u00f9y ch\u1ec9nh:<\/strong> C\u00e1c m\u00e3 \u0111\u1ecbnh danh n\u1ed5i (v\u00ed d\u1ee5: m\u00e3 v\u00f9ng, nh\u00e3n s\u1edf h\u1eefu nh\u01b0 &quot;\u0110i\u1ec7n&quot; ho\u1eb7c &quot;N\u01b0\u1edbc th\u1ea3i&quot; v\u00e0 \u0111\u1ecbnh m\u1ee9c t\u1ea3i tr\u1ecdng) gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o tr\u00ec. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u1ea3m ti\u1ebfng \u1ed3n: Gio\u0103ng cao su ho\u1eb7c \u1ed1ng l\u00f3t nylon gi\u00fap gi\u1ea3m ti\u1ebfng \u1ed3n va ch\u1ea1m gi\u1eefa khung n\u1eafp v\u00e0 khung m\u00e1y t\u1eeb 10\u201315 dB. \u00a0<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p><strong>\u00a0II. \u01afu \u0111i\u1ec3m c\u1ed1t l\u00f5i \u00a0<\/strong><\/p>\n\n\n\n<p><strong>1. Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ef1c cao \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n 400\u2013600 MPa, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c xe t\u1ea3i h\u1ea1ng n\u1eb7ng v\u00e0 xe c\u1ee9u h\u1ecfa (v\u00ed d\u1ee5: c\u1ea5p D400: t\u1ea3i tr\u1ecdng 40 t\u1ea5n), l\u00fd t\u01b0\u1edfng cho \u0111\u01b0\u1eddng cao t\u1ed1c, c\u1ea3ng v\u00e0 khu v\u1ef1c c\u00f3 l\u01b0u l\u01b0\u1ee3ng giao th\u00f4ng cao. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp v\u01b0\u1ee3t tr\u1ed9i, v\u01b0\u1ee3t qua th\u1eed nghi\u1ec7m th\u1ea3 r\u01a1i EN 124 m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y, v\u01b0\u1ee3t tr\u1ed9i h\u01a1n v\u1eadt li\u1ec7u composite v\u1ec1 \u0111\u1ed9 an to\u00e0n. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>2. \u0110\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u qu\u1ea3 chi ph\u00ed \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n cao h\u01a1n th\u00e9p ti\u00eau chu\u1ea9n g\u1ea5p 3 l\u1ea7n, tu\u1ed5i th\u1ecd v\u01b0\u1ee3t qu\u00e1 30 n\u0103m. Chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p h\u01a1n v\u1eadt li\u1ec7u composite (kh\u00f4ng c\u1ea7n thay th\u1ebf th\u01b0\u1eddng xuy\u00ean). \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0B\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u: Ch\u1ec9 c\u1ea7n ph\u1ee7 l\u1edbp ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ecbnh k\u1ef3 l\u00e0 \u0111\u1ee7; kh\u00f4ng c\u1ea7n v\u1ec7 sinh chuy\u00ean d\u1ee5ng hay ch\u1ed1ng g\u1ec9. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Ch\u1ed1ng tr\u1ed9m v\u00e0 an to\u00e0n \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0Kh\u00f3a ho\u1eb7c b\u1ea3n l\u1ec1 ba \u0111i\u1ec3m ng\u0103n ch\u1eb7n tr\u1ed9m c\u1eafp, \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 m\u1edf, gi\u1ea3m t\u1ef7 l\u1ec7 tr\u1ed9m c\u1eafp 80% so v\u1edbi kh\u00f3a s\u1eaft x\u00e1m truy\u1ec1n th\u1ed1ng. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0V\u1eadt li\u1ec7u c\u00f3 m\u1eadt \u0111\u1ed9 cao (7,3 g\/cm\u00b3) kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb ph\u1ebf li\u1ec7u, lo\u1ea1i b\u1ecf \u0111\u1ed9ng c\u01a1 tr\u1ed9m c\u1eafp. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>4. Kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0Ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t (-40\u00b0C \u0111\u1ebfn 350\u00b0C), ch\u1ecbu \u0111\u01b0\u1ee3c chu k\u1ef3 \u0111\u00f3ng b\u0103ng-tan b\u0103ng, ph\u00f9 h\u1ee3p v\u1edbi kh\u00ed h\u1eadu v\u00f9ng c\u1ef1c, nhi\u1ec7t \u0111\u1edbi v\u00e0 \u1ea9m \u01b0\u1edbt. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0L\u1edbp ph\u1ee7 ch\u1ed1ng \u0103n m\u00f2n (v\u00ed d\u1ee5, phun k\u1ebdm + nh\u1ef1a \u0111\u01b0\u1eddng) ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ef1 \u0103n m\u00f2n c\u1ee7a \u0111\u1ea5t v\u00e0 n\u01b0\u1edbc ng\u1ea7m (pH 5\u20139), k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>5. Chu\u1ea9n h\u00f3a v\u00e0 t\u01b0\u01a1ng th\u00edch \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0K\u00edch th\u01b0\u1edbc \u0111\u1ed3ng nh\u1ea5t (k\u00edch th\u01b0\u1edbc th\u00f4ng d\u1ee5ng: \u03c6600 mm, \u03c6700 mm) \u0111\u1ea3m b\u1ea3o t\u01b0\u01a1ng th\u00edch v\u1edbi khung hi\u1ec7n c\u00f3, gi\u1ea3m thi\u1ec3u chi ph\u00ed c\u1ea3i t\u1ea1o. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0K\u1ebft c\u1ea5u b\u1ec1 m\u1eb7t ho\u1eb7c d\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh \u0111\u00e1p \u1ee9ng nhu c\u1ea7u qu\u1ea3n l\u00fd \u0111\u00f4 th\u1ecb. \u00a0<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p><strong>\u00a0III. C\u00e1c t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng \u00a0<\/strong><\/p>\n\n\n\n<p><strong>1. \u0110\u01b0\u1eddng \u0111\u00f4 th\u1ecb \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0N\u1eafp c\u1ed1ng\/n\u01b0\u1edbc m\u01b0a (c\u1ea5p D400) cho c\u00e1c tuy\u1ebfn \u0111\u01b0\u1eddng \u0111\u00f4 th\u1ecb v\u00e0 \u0111\u01b0\u1eddng cao t\u1ed1c, ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng xe n\u1eb7ng nhi\u1ec1u l\u1ea7n. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0N\u1eafp khe co gi\u00e3n c\u1ea7u, ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng \u0111\u1ed9ng v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c m\u1ecfi. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>2. Trung t\u00e2m c\u00f4ng nghi\u1ec7p v\u00e0 giao th\u00f4ng \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0C\u00e1c khu v\u1ef1c ch\u1ecbu t\u00e1c \u0111\u1ed9ng cao t\u1ea1i c\u00e1c c\u1ea3ng, khu h\u1eadu c\u1ea7n v\u00e0 h\u1ed1 ki\u1ec3m tra \u0111\u01b0\u1eddng ray xe l\u1eeda, b\u1ea3o v\u1ec7 c\u00e1c ti\u1ec7n \u00edch ng\u1ea7m. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Ti\u1ec7n \u00edch c\u00f4ng c\u1ed9ng \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0Che ch\u1eafn kh\u1ea9n c\u1ea5p cho l\u00e0n \u0111\u01b0\u1eddng c\u1ee9u h\u1ecfa v\u00e0 \u0111\u01b0\u1eddng b\u0103ng s\u00e2n bay, \u0111\u1ea3m b\u1ea3o ti\u1ebfp c\u1eadn nhanh ch\u00f3ng trong tr\u01b0\u1eddng h\u1ee3p kh\u1ea9n c\u1ea5p. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0N\u00e2ng c\u1ea5p c\u00e1c c\u1ed9ng \u0111\u1ed3ng c\u0169 b\u1eb1ng c\u00e1ch thay th\u1ebf l\u1edbp ph\u1ee7 b\u1eb1ng s\u1eaft x\u00e1m ho\u1eb7c b\u00ea t\u00f4ng d\u1ec5 v\u1ee1. \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>4. M\u00f4i tr\u01b0\u1eddng \u0111\u1eb7c bi\u1ec7t \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0H\u1ed1 ki\u1ec3m tra cho \u0111\u01b0\u1eddng \u1ed1ng h\u01a1i n\u01b0\u1edbc nhi\u1ec7t \u0111\u1ed9 cao, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n v\u1eadt li\u1ec7u composite. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0\u00a0L\u1edbp ph\u1ee7 ch\u1ed1ng \u0103n m\u00f2n l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh r\u1ec9 s\u00e9t \u1edf nh\u1eefng v\u00f9ng c\u00f3 nhi\u1ec1u m\u01b0a ho\u1eb7c \u1ea9m \u01b0\u1edbt. \u00a0<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p><strong>\u00a0IV. Ch\u1ee9ng nh\u1eadn v\u00e0 Ti\u00eau chu\u1ea9n \u00a0<\/strong><\/p>\n\n\n\n<p><strong>Ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf: \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0EN 124 (Ph\u00e2n lo\u1ea1i t\u1ea3i tr\u1ecdng Ch\u00e2u \u00c2u), ASTM A536 (ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u Hoa K\u1ef3). \u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>Ti\u00eau chu\u1ea9n Trung Qu\u1ed1c: \u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0GB\/T 23858-2009 N\u1eafp h\u1ed1 ga<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0N\u1eafp h\u1ed1 ga b\u1eb1ng gang d\u1ebbo CJ\/T 511-2017<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0GB\/T 19426-2018 *N\u1eafp h\u1ed1 ga b\u1eb1ng gang d\u1ebbo cho \u0111\u01b0\u1eddng b\u1ed9 v\u00e0 c\u1ea7u (ti\u00eau chu\u1ea9n qu\u1ed1c gia ch\u00ednh, ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u m\u00e1y, k\u00edch th\u01b0\u1edbc, h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t, kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i, hi\u1ec7u su\u1ea5t ch\u1ed1ng tr\u01b0\u1ee3t\/ch\u1ed1ng n\u1ed5, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, v.v.). \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0\u00a0CJJ\/T 122-2016 *Quy chu\u1ea9n thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt tho\u00e1t n\u01b0\u1edbc \u0111\u01b0\u1eddng \u0111\u00f4 th\u1ecb. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ch\u1ee9ng nh\u1eadn: CE Marking (EU), Qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng ISO 9001, B\u00e1o c\u00e1o kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a SGS. \u00a0<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p><strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt s\u1ea3n ph\u1ea9m:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ph\u1ea1m vi k\u00edch th\u01b0\u1edbc: \u03c6300\u2013\u03c61000 \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u00e1c l\u1edbp t\u1ea3i: C250\u2013E600 \u00a0<\/li>\n<\/ul>\n<\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>N\u1eafp h\u1ed1 ga tr\u00f2n ti\u00eau chu\u1ea9n b\u1eb1ng gang d\u1ebbo - Thi\u1ebft k\u1ebf b\u1ec1n ch\u1eafc, \u0111\u1ed9 b\u1ec1n v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng I. Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u II. \u01afu \u0111i\u1ec3m c\u1ed1t l\u00f5i 1. Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ef1c cao 2. \u0110\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed 3. Ch\u1ed1ng tr\u1ed9m v\u00e0 an to\u00e0n 4. Kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng 5. Ti\u00eau chu\u1ea9n h\u00f3a v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch III. C\u00e1c t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng 1. \u0110\u01b0\u1eddng \u0111\u00f4 th\u1ecb 2. [\u2026]<\/p>","protected":false},"author":1,"featured_media":517,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,2,8],"tags":[64,63,62],"class_list":["post-514","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ductile-cast-iron-products","category-products","category-round-manhole-cover","tag-ductile-iron-manhole-cover","tag-manhole-cover","tag-round-manhole-cover"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ductile Cast Iron Standard Round Manhole Cover \u00a0 Ductile Cast Iron Products - LZBMetal Products Co., Ltd<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lzbmetal.com\/vi\/nap-ho-ga-tron-tieu-chuan-bang-gang-deo\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ductile Cast Iron Standard Round Manhole Cover \u00a0 Ductile Cast Iron Products - LZBMetal Products Co., Ltd\" \/>\n<meta property=\"og:description\" content=\"Ductile Iron Standard Round Manhole Cover \u00a0 - Strength, Durability, and Eco-Friendly Design \u00a0I. 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