{"id":532,"date":"2025-05-21T06:31:27","date_gmt":"2025-05-21T06:31:27","guid":{"rendered":"https:\/\/lzbmetal.com\/?p=532"},"modified":"2025-06-06T06:39:43","modified_gmt":"2025-06-06T06:39:43","slug":"nap-ho-ga-vuong-tieu-chuan-bang-gang-deo","status":"publish","type":"post","link":"https:\/\/lzbmetal.com\/vi\/nap-ho-ga-vuong-tieu-chuan-bang-gang-deo\/","title":{"rendered":"N\u1eafp h\u1ed1 ga vu\u00f4ng ti\u00eau chu\u1ea9n b\u1eb1ng gang d\u1ebbo"},"content":{"rendered":"

N\u1eafp h\u1ed1 ga vu\u00f4ng 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><\/h3>\n\n\n\n

Quy tr\u00ecnh s\u1ea3n xu\u1ea5t & Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u<\/strong><\/p>\n\n\n\n

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V\u1eadt li\u1ec7u & Quy tr\u00ecnh<\/strong><\/p>\n\n\n\n

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  • T\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u: Gang d\u1ebbo tr\u1ea3i qua qu\u00e1 tr\u00ecnh k\u1ebft h\u1ea1t magie\/\u0111\u1ea5t hi\u1ebfm, t\u1ea1o ra s\u1ef1 ph\u00e2n b\u1ed1 graphite h\u00ecnh c\u1ea7u \u0111\u1ec3 c\u00f3 \u0111\u1ed9 b\u1ec1n \u0111\u1eb7c bi\u1ec7t (\u0111\u1ed9 b\u1ec1n k\u00e9o \u2265 420MPa) v\u00e0 \u0111\u1ed9 dai (\u0111\u1ed9 gi\u00e3n d\u00e0i \u2265 10%), v\u01b0\u1ee3t tr\u1ed9i h\u01a1n gang x\u00e1m.<\/li>\n<\/ul>\n\n\n\n
      \n
    • Quy tr\u00ecnh \u0111\u00fac: S\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fac nh\u1ef1a ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o b\u1ecdt, c\u00f3 x\u1eed l\u00fd ch\u1ed1ng \u0103n m\u00f2n b\u1ec1 m\u1eb7t (phun k\u1ebdm, epoxy, ho\u1eb7c nh\u1ef1a \u0111\u01b0\u1eddng) \u0111\u1ec3 tr\u00ec ho\u00e3n qu\u00e1 tr\u00ecnh g\u1ec9 (tu\u1ed5i th\u1ecd \u226530 n\u0103m).<\/li>\n<\/ul>\n\n\n\n
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      • Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n: \u0110\u00e1p \u1ee9ng EN124, GB\/T23858 v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf\/qu\u1ed1c gia kh\u00e1c, v\u1edbi c\u00e1c c\u1ea5p t\u1ea3i tr\u1ecdng t\u1eeb C250 (25 t\u1ea5n) \u0111\u1ebfn E600 (60 t\u1ea5n).<\/li>\n<\/ul>\n<\/blockquote>\n<\/blockquote>\n<\/blockquote>\n<\/blockquote>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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        Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u<\/h2>\n\n\n\n
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        • H\u00ecnh h\u1ecdc vu\u00f4ng: C\u00e1c lo\u1ea1i kh\u1edbp m\u1edf h\u00ecnh vu\u00f4ng, t\u00edch h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng tho\u00e1t n\u01b0\u1edbc tuy\u1ebfn t\u00ednh, gi\u1ea3m thi\u1ec3u kho\u1ea3ng c\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 gi\u1ea3m nguy c\u01a1 m\u1eafc k\u1eb9t m\u1ea3nh v\u1ee1.<\/li>\n<\/ul>\n\n\n\n
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          • Thi\u1ebft k\u1ebf ch\u1ed1ng d\u1ecbch chuy\u1ec3n: Kh\u00f3a \u0111a \u0111i\u1ec3m (v\u00ed d\u1ee5: bu l\u00f4ng g\u00f3c) ho\u1eb7c k\u1ebft n\u1ed1i b\u1ea3n l\u1ec1 gi\u00fap ng\u0103n ng\u1eeba d\u1ecbch chuy\u1ec3n ho\u1eb7c tr\u1ed9m c\u1eafp.<\/li>\n<\/ul>\n\n\n\n
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            • B\u1ec1 m\u1eb7t ch\u1ed1ng tr\u01b0\u1ee3t: K\u1ebft c\u1ea5u r\u00e3nh ho\u1eb7c hoa v\u0103n kim c\u01b0\u01a1ng \u0111\u1ea3m b\u1ea3o h\u1ec7 s\u1ed1 ma s\u00e1t \u22650,6, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong \u0111i\u1ec1u ki\u1ec7n \u1ea9m \u01b0\u1edbt\/c\u00f3 tuy\u1ebft.<\/li>\n<\/ul>\n\n\n\n
                \n
              • ModularSplicing: H\u1ed7 tr\u1ee3 c\u1ea5u h\u00ecnh nhi\u1ec1u t\u1ea5m cho c\u00e1c r\u00e3nh c\u00f3 chi\u1ec1u r\u1ed9ng l\u1edbn (v\u00ed d\u1ee5: k\u1ebft h\u1ee3p 2m\u00d71m).<\/li>\n<\/ul>\n<\/blockquote>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n
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                3. T\u00f9y ch\u1ec9nh ch\u1ee9c n\u0103ng<\/strong><\/p>\n\n\n\n

                  \n
                • D\u1ea5u hi\u1ec7u: Kh\u1eafc t\u00f9y ch\u1ec9nh (v\u00ed d\u1ee5: "Kh\u00ed \u0111\u1ed1t", "Vi\u1ec5n th\u00f4ng"), m\u00e3 v\u00f9ng v\u00e0 \u0111\u1ecbnh m\u1ee9c t\u1ea3i \u0111\u1ec3 qu\u1ea3n l\u00fd b\u1ea3o tr\u00ec.<\/li>\n<\/ul>\n\n\n\n
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                  • Gi\u1ea3m ti\u1ebfng \u1ed3n: Gio\u0103ng cao su ho\u1eb7c \u0111\u1ec7m nylon gi\u00fap gi\u1ea3m ti\u1ebfng \u1ed3n c\u1ee7a xe t\u1eeb 10-15dB.<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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                    \u01afu \u0111i\u1ec3m c\u1ed1t l\u00f5i<\/strong><\/h3>\n\n\n\n
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                    1. Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i v\u00e0 va \u0111\u1eadp c\u1ef1c cao<\/p>\n\n\n\n

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                    • C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n 400-600MPa h\u1ed7 tr\u1ee3 xe t\u1ea3i v\u00e0 m\u00e1y m\u00f3c h\u1ea1ng n\u1eb7ng (v\u00ed d\u1ee5: t\u1ea3i tr\u1ecdng 60 t\u1ea5n c\u1ea5p E600), l\u00fd t\u01b0\u1edfng cho c\u00e1c c\u1ea3ng v\u00e0 trung t\u00e2m h\u1eadu c\u1ea7n.<\/li>\n<\/ul>\n\n\n\n
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                      • \u0110\u1ea1t ti\u00eau chu\u1ea9n th\u1eed nghi\u1ec7m th\u1ea3 r\u01a1i EN124 m\u00e0 kh\u00f4ng b\u1ecb n\u1ee9t v\u1ee1; kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp v\u01b0\u1ee3t tr\u1ed9i h\u01a1n v\u1eadt li\u1ec7u composite g\u1ea5p 3 l\u1ea7n.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n
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                        2. \u0110\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/strong><\/p>\n\n\n\n

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                        • Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n cao g\u1ea5p 3 l\u1ea7n th\u00e9p nh\u1eb9; tu\u1ed5i th\u1ecd tr\u00ean 30 n\u0103m v\u1edbi chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p h\u01a1n so v\u1edbi v\u1eadt li\u1ec7u composite (kh\u00f4ng c\u1ea7n thay th\u1ebf th\u01b0\u1eddng xuy\u00ean).<\/li>\n<\/ul>\n\n\n\n
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                          • B\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u (ch\u1ec9 c\u1ea7n ph\u1ee7 l\u1edbp ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ecbnh k\u1ef3).<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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                            3. Ch\u1ed1ng tr\u1ed9m & An to\u00e0n<\/strong><\/p>\n\n\n\n

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                            • - C\u1ea7n c\u00f3 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 kh\u00f3a g\u00f3c\/b\u1ea3n l\u1ec1, gi\u1ea3m tr\u1ed9m c\u1eafp b\u1eb1ng 85%vs.grayiron.<\/li>\n\n\n\n
                            • - V\u1eadt li\u1ec7u c\u00f3 m\u1eadt \u0111\u1ed9 cao (7,3g\/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.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

                              4. Kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/strong><\/p>\n\n\n\n

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                              • Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9: -40\u00b0C \u0111\u1ebfn 350\u00b0C; ch\u1ecbu \u0111\u01b0\u1ee3c chu k\u1ef3 \u0111\u00f3ng b\u0103ng-tan b\u0103ng v\u00e0 kh\u00ed h\u1eadu kh\u1eafc nghi\u1ec7t.<\/li>\n\n\n\n
                              • L\u1edbp ph\u1ee7 ch\u1ed1ng \u0103n m\u00f2n (v\u00ed d\u1ee5, h\u1ee3p kim k\u1ebdm + polyurethane) ch\u1ecbu \u0111\u01b0\u1ee3c \u0111\u1ed9 pH c\u1ee7a \u0111\u1ea5t t\u1eeb 5-10.<\/li>\n<\/ul>\n\n\n\n

                                5. Linh ho\u1ea1t trong l\u1eafp \u0111\u1eb7t<\/strong><\/p>\n\n\n\n

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                                • Squaredesignfits r\u00e3nh\/\u1ed1ng c\u00e1p tuy\u1ebfn t\u00ednh, lo\u1ea1i b\u1ecf nhu c\u1ea7u c\u1ea3i t\u1ea1o.<\/li>\n\n\n\n
                                • K\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n (v\u00ed d\u1ee5: 500\u00d7500mm, 600\u00d7600mm) t\u01b0\u01a1ng th\u00edch v\u1edbi khung vu\u00f4ng hi\u1ec7n c\u00f3.<\/li>\n<\/ul>\n\n\n\n
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                                  \u1ee8ng d\u1ee5ng<\/h3>\n\n\n\n

                                  1. \u0110\u00f4 th\u1ecb & Giao th\u00f4ng v\u1eadn t\u1ea3i<\/strong><\/p>\n\n\n\n

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                                  • N\u1eafp tho\u00e1t n\u01b0\u1edbc h\u00ecnh vu\u00f4ng (c\u1ea5p C250) cho v\u1ec9a h\u00e8\/l\u00e0n \u0111\u01b0\u1eddng kh\u00f4ng c\u00f3 \u0111\u1ed9ng c\u01a1.<\/li>\n\n\n\n
                                  • Khu v\u1ef1c d\u1ecbch v\u1ee5 \u0111\u01b0\u1eddng cao t\u1ed1c\/\u0111i\u1ec3m ti\u1ebfp c\u1eadn \u0111\u01b0\u1eddng h\u1ea7m c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i \u0111\u1ed9ng ch\u1ed1ng m\u1ecfi.<\/li>\n<\/ul>\n\n\n\n

                                    2. C\u00f4ng nghi\u1ec7p & N\u0103ng l\u01b0\u1ee3ng<\/strong><\/p>\n\n\n\n

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                                    • Khu v\u1ef1c ch\u1ecbu t\u1ea3i n\u1eb7ng (c\u1ea5p E600) trong nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t\/th\u00e9p \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng \u1ed1ng ng\u1ea7m.<\/li>\n\n\n\n
                                    • Squareinspectioncovers d\u00e0nh cho r\u00e3nh c\u00e1p \u0111i\u1ec7n\/vi\u1ec5n th\u00f4ng.<\/li>\n<\/ul>\n\n\n\n

                                      3. Kh\u00f4ng gian th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng c\u1ed9ng<\/strong><\/p>\n\n\n\n

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                                      • N\u1eafp tho\u00e1t n\u01b0\u1edbc \u00e2m t\u01b0\u1eddng c\u00f3 k\u1ebft c\u1ea5u gi\u1ed1ng \u0111\u00e1 d\u00e0nh cho qu\u1ea3ng tr\u01b0\u1eddng\/tr\u1ea1m t\u00e0u \u0111i\u1ec7n ng\u1ea7m.<\/li>\n\n\n\n
                                      • Gi\u1ea3i ph\u00e1p c\u1ea3i t\u1ea1o kh\u00f4ng gian m\u1edf cho c\u1ed9ng \u0111\u1ed3ng, thay th\u1ebf l\u1edbp ph\u1ee7 b\u00ea t\u00f4ng m\u1ecfng manh.<\/li>\n<\/ul>\n\n\n\n

                                        4.M\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<\/strong><\/p>\n\n\n\n

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                                        • V\u1ecf ch\u1ecbu nhi\u1ec7t d\u00f9ng cho h\u1ed1 ki\u1ec3m tra \u0111\u01b0\u1eddng \u1ed1ng h\u01a1i trong c\u00e1c nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p.<\/li>\n\n\n\n
                                        • C\u00e1c khu v\u1ef1c ven bi\u1ec3n c\u00f3 c\u1eeda h\u00e0ng m\u1ea1 k\u1ebdm s\u1ebd ch\u1ed1ng l\u1ea1i s\u1ef1 \u0103n m\u00f2n c\u1ee7a clo.<\/li>\n<\/ul>\n\n\n\n
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                                          IV.Ch\u1ee9ng nh\u1eadn & Ti\u00eau chu\u1ea9n<\/strong><\/h3>\n\n\n\n
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                                          • Qu\u1ed1c t\u1ebf: EN124 (EUloadclasses), ASTMA536 (USmaterialstandard).<\/li>\n\n\n\n
                                          • Ti\u00eau chu\u1ea9n Trung Qu\u1ed1c:<\/li>\n\n\n\n
                                          • GB\/T23858-2009"N\u1eafp c\u1ed1ng"<\/li>\n\n\n\n
                                          • CJ\/T511-2017"N\u1eafp c\u1ed1ng b\u1eb1ng gang d\u1ebbo"<\/li>\n\n\n\n
                                          • GB\/T19426-2018 "N\u1eafp c\u1ed1ng b\u1eb1ng gang d\u1ebbo cho \u0111\u01b0\u1eddng b\u1ed9 v\u00e0 c\u1ea7u" (th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u1ecbu t\u1ea3i, ch\u1ed1ng \u0103n m\u00f2n, ch\u1ed1ng tr\u01b0\u1ee3t).<\/li>\n\n\n\n
                                          • Ch\u1ee9ng ch\u1ec9: CEMarking(EU), ISO9001, SGSSaltSprayTest(ASTMB117).<\/li>\n<\/ul>\n\n\n\n
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                                            C\u1ea5p ch\u1ecbu t\u1ea3i v\u00e0 v\u00f9ng \u00e1p d\u1ee5ng:<\/strong><\/h3>\n\n\n\n

                                            Ch\u1ecdn c\u1ea5p ch\u1ecbu t\u1ea3i ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n:<\/p>\n\n\n\n

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                                            • Nh\u00f3m 1 (\u0110i\u1ec3m t\u1ed1i thi\u1ec3u: A15)<\/strong>: V\u00e0nh \u0111ai xanh, v\u1ec9a h\u00e8, khu v\u1ef1c d\u00e0nh cho ng\u01b0\u1eddi \u0111i b\u1ed9 v\u00e0 khu v\u1ef1c c\u1ea5m ph\u01b0\u01a1ng ti\u1ec7n c\u01a1 gi\u1edbi.<\/li>\n\n\n\n
                                            • Nh\u00f3m 2 (\u0110i\u1ec3m t\u1ed1i thi\u1ec3u: B125)<\/strong>: V\u1ec9a h\u00e8, l\u00e0n \u0111\u01b0\u1eddng d\u00e0nh cho xe kh\u00f4ng c\u00f3 \u0111\u1ed9ng c\u01a1, b\u00e3i \u0111\u1ed7 xe, b\u00e3i \u0111\u1ed7 xe ng\u1ea7m.<\/li>\n\n\n\n
                                            • Nh\u00f3m 3 (M\u1ee9c t\u1ed1i thi\u1ec3u: C250)<\/strong>: Khu d\u00e2n c\u01b0, ng\u00f5 h\u1ebbm, khu v\u1ef1c d\u00e0nh cho xe nh\u1eb9 v\u00e0 khu v\u1ef1c g\u1ea7n l\u1ec1 \u0111\u01b0\u1eddng.<\/li>\n\n\n\n
                                            • Nh\u00f3m 4 (\u0110i\u1ec3m t\u1ed1i thi\u1ec3u: D400)<\/strong>: \u0110\u01b0\u1eddng ch\u00ednh \u0111\u00f4 th\u1ecb, \u0111\u01b0\u1eddng cao t\u1ed1c v\u00e0 \u0111\u01b0\u1eddng cao t\u1ed1c.<\/li>\n\n\n\n
                                            • Nh\u00f3m 5 (C\u1ea5p \u0111\u1ed9 t\u1ed1i thi\u1ec3u: E600)<\/strong>: Nh\u00e0 ga h\u00e0ng h\u00f3a, c\u1ea3ng v\u00e0 s\u00e2n bay.<\/li>\n\n\n\n
                                            • Nh\u00f3m 6 (\u0110i\u1ec3m t\u1ed1i thi\u1ec3u: F900)<\/strong>: \u0110\u01b0\u1eddng b\u0103ng s\u00e2n bay v\u00e0 c\u00e1c khu v\u1ef1c c\u00f3 t\u1ea3i tr\u1ecdng cao kh\u00e1c.<\/li>\n<\/ul>\n\n\n\n
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                                              Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt s\u1ea3n ph\u1ea9m:<\/strong><\/p>\n\n\n\n

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                                              • K\u00edch th\u01b0\u1edbc: 300\u00d7300mm\u20131000\u00d71000mm<\/li>\n\n\n\n
                                              • T\u1ea3i l\u1edbp: B125\u2013E600<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

                                                N\u1eafp h\u1ed1 ga vu\u00f4ng 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 Quy tr\u00ecnh s\u1ea3n xu\u1ea5t & Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u V\u1eadt li\u1ec7u & Quy tr\u00ecnh Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u 3. \u01afu \u0111i\u1ec3m c\u1ed1t l\u00f5i t\u00f9y ch\u1ec9nh ch\u1ee9c n\u0103ng 1. Ch\u1ecbu t\u1ea3i c\u1ef1c cao & ch\u1ed1ng va \u0111\u1eadp 2. \u0110\u1ed9 b\u1ec1n & Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed 3. Ch\u1ed1ng tr\u1ed9m & An to\u00e0n 4. Th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng 5. Linh ho\u1ea1t khi l\u1eafp \u0111\u1eb7t \u1ee8ng d\u1ee5ng 1. \u0110\u00f4 th\u1ecb & Giao th\u00f4ng v\u1eadn t\u1ea3i 2. C\u00f4ng nghi\u1ec7p & N\u0103ng l\u01b0\u1ee3ng 3. Kh\u00f4ng gian th\u01b0\u01a1ng m\u1ea1i & c\u00f4ng c\u1ed9ng 4. M\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t IV. Ch\u1ee9ng nh\u1eadn & Ti\u00eau chu\u1ea9n C\u1ea5p ch\u1ecbu t\u1ea3i & Khu v\u1ef1c \u00e1p d\u1ee5ng: Ch\u1ecdn c\u1ea5p ch\u1ecbu t\u1ea3i ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n: Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt s\u1ea3n ph\u1ea9m:<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,2,43],"tags":[66,65,67],"class_list":["post-532","post","type-post","status-publish","format-standard","hentry","category-ductile-cast-iron-products","category-products","category-square-manhole-cover","tag-ductile-iron-standard","tag-manhole-covers","tag-square-manhole-covers"],"yoast_head":"\nDuctile Cast Iron Standard Square Manhole Covers 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-vuong-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 Square Manhole Covers Ductile Cast Iron Products - 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