{"id":2661,"date":"2025-03-29T10:51:00","date_gmt":"2025-03-29T02:51:00","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2661"},"modified":"2026-04-13T14:04:58","modified_gmt":"2026-04-13T06:04:58","slug":"pressure-equipment-failure-reasons","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/pressure-equipment-failure-reasons\/","title":{"rendered":"Top Six Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a thi\u1ebft b\u1ecb ch\u1ecbu \u00e1p l\u1ef1c"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>SJ Gauge c\u00f3 nhi\u1ec1u n\u0103m kinh nghi\u1ec7m chuy\u00ean nghi\u1ec7p trong l\u0129nh v\u1ef1c \u0111o l\u01b0\u1eddng \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd chia s\u1ebb v\u1edbi b\u1ea1n c\u00e1ch \u0111\u1ecdc v\u00e0 gi\u1ea3i th\u00edch c\u00e1c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t. Ch\u00fang t\u00f4i c\u0169ng s\u1ebd cung c\u1ea5p h\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00e1ch x\u1eed l\u00fd c\u00e1c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t b\u1ecb h\u01b0 h\u1ecfng. Ngo\u00e0i ra, ch\u00fang t\u00f4i s\u1ebd th\u1ea3o lu\u1eadn v\u1ec1 s\u00e1u nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y h\u1ecfng h\u00f3c \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t, gi\u00fap b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c hi\u1ec3u bi\u1ebft to\u00e0n di\u1ec7n th\u00f4ng qua b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n\n<p>N\u1ebfu b\u1ea1n quan t\u00e2m \u0111\u1ebfn ch\u1ee7 \u0111\u1ec1 c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, vui l\u00f2ng ti\u1ebfp t\u1ee5c \u0111\u1ecdc. H\u00e3y tho\u1ea3i m\u00e1i \u0111\u1eb7t c\u00e2u h\u1ecfi ho\u1eb7c li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi ch\u00fang t\u00f4i. SJ Gauge cam k\u1ebft cung c\u1ea5p cho b\u1ea1n nh\u1eefng c\u00e2u tr\u1ea3 l\u1eddi v\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1t nh\u1ea5t.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges-1024x768.png\" alt=\"\" class=\"wp-image-2663\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges-1024x768.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges-300x225.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges-768x576.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges-600x450.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_pressure_gauges.png 1478w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter 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=\"B\u1eadt\/t\u1eaft M\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">B\u1eadt\/T\u1eaft<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" 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: #7b1e1c;color:#7b1e1c\" 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.sj-gauge.com\/vi\/pressure-equipment-failure-reasons\/#1what-causes-pressure-gauges-to-fail\" >1. Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra s\u1ef1 c\u1ed1 c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-equipment-failure-reasons\/#2the-six-main-reasons-for-pressure-equipment-failure\" >2. S\u00e1u nguy\u00ean nh\u00e2n ch\u00ednh d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a thi\u1ebft b\u1ecb ch\u1ecbu \u00e1p l\u1ef1c.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-equipment-failure-reasons\/#3regular-maintenance-and-servicing-of-pressure-gauges\" >3. B\u1ea3o d\u01b0\u1ee1ng v\u00e0 b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 c\u00e1c \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-77ebf338e0f8735b07742acf4fd6d536\"><span class=\"ez-toc-section\" id=\"1what-causes-pressure-gauges-to-fail\"><\/span>1. Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra s\u1ef1 c\u1ed1 c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00f3 nhi\u1ec1u nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t, ph\u1ea7n l\u1edbn trong s\u1ed1 \u0111\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c v\u1eadn h\u00e0nh kh\u00f4ng \u0111\u00fang c\u00e1ch v\u00e0 l\u1ed7i c\u1ee7a con ng\u01b0\u1eddi. Mi\u1ec5n l\u00e0 ch\u00fang ta hi\u1ec3u r\u00f5 v\u1ec1 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t v\u00e0 s\u1eed d\u1ee5ng ch\u00fang c\u1ea9n th\u1eadn, ch\u00fang ta c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c y\u1ebfu t\u1ed1 ph\u1ed5 bi\u1ebfn d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t v\u00e0 c\u00e1ch tr\u00e1nh nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y. \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 ti\u00eau chu\u1ea9n \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t, vui l\u00f2ng tham kh\u1ea3o ASME B40.100-2013 v\u00e0 EN837-1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-43380d57d66c9628888c5906a0b522eb\"><span class=\"ez-toc-section\" id=\"2the-six-main-reasons-for-pressure-equipment-failure\"><\/span>2. S\u00e1u nguy\u00ean nh\u00e2n ch\u00ednh d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a thi\u1ebft b\u1ecb ch\u1ecbu \u00e1p l\u1ef1c.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">(a) Dao \u0111\u1ed9ng\/rung \u0111\u1ed9ng qu\u00e1 m\u1ee9c<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"302\" height=\"434\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_Pulsation_causes_pointer_flutter_and_poor_gauge_readability-1.png\" alt=\"\" class=\"wp-image-2664\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_Pulsation_causes_pointer_flutter_and_poor_gauge_readability-1.png 302w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_Pulsation_causes_pointer_flutter_and_poor_gauge_readability-1-209x300.png 209w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_Pulsation_causes_pointer_flutter_and_poor_gauge_readability-1-300x431.png 300w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><figcaption class=\"wp-element-caption\">Dao \u0111\u1ed9ng g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng rung kim v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>Dao \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb qu\u00e1 tr\u00ecnh s\u1ebd g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng dao \u0111\u1ed9ng kim ch\u1ec9 v\u00e0 t\u0103ng \u00e1p l\u1ef1c l\u00ean \u1ed1ng Bourdon. \u0110i\u1ec1u n\u00e0y c\u0169ng c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng cho c\u00e1c b\u00e1nh r\u0103ng v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c trong th\u1eddi gian d\u00e0i.<br>S\u1ef1 t\u0103ng \u0111\u1ed9t ng\u1ed9t \u00e1p su\u1ea5t trong qu\u00e1 tr\u00ecnh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn dao \u0111\u1ed9ng, g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng kim \u0111\u1ed3ng h\u1ed3 rung l\u1eafc v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o. S\u1ef1 suy gi\u1ea3m v\u1ec1 \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn \u0111\u1ed3ng h\u1ed3 \u0111o c\u0169ng c\u00f3 th\u1ec3 x\u1ea3y ra.<br>S\u1ef1 t\u0103ng \u0111\u1ed9t ng\u1ed9t \u00e1p su\u1ea5t trong h\u1ec7 th\u1ed1ng th\u01b0\u1eddng x\u1ea3y ra khi m\u1edf\/\u0111\u00f3ng van li\u00ean t\u1ee5c ho\u1eb7c khi \u00e1p su\u1ea5t t\u0103ng \u0111\u1ed9t ng\u1ed9t v\u00e0 gi\u1ea3m m\u1ea1nh, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m cong kim ch\u1ec9 th\u1ecb v\u00e0 l\u00e0m g\u00e3y ch\u1ed1t d\u1eebng.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>S\u1eed d\u1ee5ng \u1ed1ng mao d\u1eabn PRA-CL cho \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t \u0111\u1ec3 l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb xa h\u01a1n so v\u1edbi ngu\u1ed3n c\u00f3 th\u1ec3 gi\u1ea3m rung \u0111\u1ed9ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<br>C\u00e1c \u0111\u1ed3ng h\u1ed3 \u0111o ch\u1ee9a ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m t\u00e1c \u0111\u1ed9ng c\u1ee7a dao \u0111\u1ed9ng. N\u1ebfu c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ee9a ch\u1ea5t l\u1ecfng, b\u1ea1n c\u00f3 th\u1ec3 xem x\u00e9t l\u1eafp \u0111\u1eb7t b\u1ed9 gi\u1ea3m dao \u0111\u1ed9ng \u00e1p su\u1ea5t PRA-SB \u0111\u1ec3 l\u00e0m gi\u1ea3m dao \u0111\u1ed9ng c\u1ee7a d\u00f2ng v\u1eadt li\u1ec7u qu\u00e1 tr\u00ecnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(b) Nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao\/c\u1ef1c th\u1ea5p<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"428\" height=\"582\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/03_SJ_pressure_gauge_with_extreme_high_process_media_temperature.png\" alt=\"\" class=\"wp-image-2665\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/03_SJ_pressure_gauge_with_extreme_high_process_media_temperature.png 428w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/03_SJ_pressure_gauge_with_extreme_high_process_media_temperature-221x300.png 221w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/03_SJ_pressure_gauge_with_extreme_high_process_media_temperature-300x408.png 300w\" sizes=\"(max-width: 428px) 100vw, 428px\" \/><figcaption class=\"wp-element-caption\">Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u1ef1c \u0111oan c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng v\u1ee1 \u1ed1ng Bourdon v\u00e0 h\u01a1i n\u01b0\u1edbc phun ra t\u1eeb l\u1ed7 th\u00f4ng h\u01a1i.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>Khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c x\u1eed l\u00fd cao h\u01a1n gi\u1edbi h\u1ea1n cho ph\u00e9p c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t, m\u1eb7t \u0111\u1ed3ng h\u1ed3, c\u1eeda s\u1ed5 v\u00e0 ch\u1ea5t l\u1ecfng b\u00ean trong d\u1ec5 b\u1ecb bi\u1ebfn m\u00e0u. Ph\u1edbt cao su s\u1ebd c\u1ee9ng l\u1ea1i v\u00e0 n\u1ee9t, g\u00e2y r\u00f2 r\u1ec9 t\u1eeb n\u00fat th\u00f4ng h\u01a1i b\u1eb1ng cao su ho\u1eb7c c\u00e1c khu v\u1ef1c kh\u00e1c.<br>\u1ed0ng Bourdon c\u00f3 th\u1ec3 b\u1ecb v\u1ee1. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7t ng\u01b0\u1eddi v\u1eadn h\u00e0nh v\u00e0o t\u00ecnh tr\u1ea1ng nguy hi\u1ec3m c\u00f3 th\u1ec3 g\u00e2y th\u01b0\u01a1ng t\u00edch. Khi nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n gi\u1edbi h\u1ea1n ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb, ch\u1ea5t l\u1ecfng b\u00ean trong s\u1ebd \u0111\u00f4ng \u0111\u1eb7c, d\u1eabn \u0111\u1ebfn th\u1eddi gian ph\u1ea3n \u1ee9ng ch\u1eadm ho\u1eb7c cho k\u1ebft qu\u1ea3 \u0111o kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>H\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, l\u00f2 s\u01b0\u1edfi v\u00e0 h\u1ec7 th\u1ed1ng phun n\u01b0\u1edbc c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u1ed5n \u0111\u1ecbnh.<br>\u1ed0ng siphon th\u00e9p kh\u00f4ng g\u1ec9 PRA-SP, b\u1ed9 gia nhi\u1ec7t v\u00e0\/ho\u1eb7c h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c x\u1eed l\u00fd. B\u1ed9 l\u00e0m m\u00e1t PRA-C cho \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1t n\u1ebfu kh\u00f4ng gian l\u1eafp \u0111\u1eb7t h\u1ea1n ch\u1ebf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(c) \u0110\u1ec9nh \u00e1p su\u1ea5t\/\u00e1p su\u1ea5t qu\u00e1 m\u1ee9c<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-576x1024.png\" alt=\"\" class=\"wp-image-2666\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-576x1024.png 576w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-169x300.png 169w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-768x1365.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-864x1536.png 864w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-300x533.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition-600x1066.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_pressure_transmitter_with_overpressure_condition.png 960w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><figcaption class=\"wp-element-caption\">\u00c1p su\u1ea5t qu\u00e1 cao khi\u1ebfn \u1ed1ng Bourdon b\u1ecb bi\u1ebfn d\u1ea1ng.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>C\u00f3 nhi\u1ec1u nguy\u00ean nh\u00e2n g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng t\u0103ng \u00e1p \u0111\u1ed9t ng\u1ed9t v\u00e0 \u00e1p su\u1ea5t qu\u00e1 cao, bao g\u1ed3m s\u1ef1 c\u1ed1 m\u00e1y m\u00f3c, \u0111\u00f3ng b\u0103ng ch\u1ea5t l\u1ecfng truy\u1ec1n \u0111\u1ed9ng v\u00e0 ho\u1ea1t \u0111\u1ed9ng van qu\u00e1 nhanh.,<br>T\u1ea5t c\u1ea3 nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ec1u khi\u1ebfn gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi to\u00e0n thang \u0111o.<br>T\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec1u ki\u1ec7n n\u00e0y s\u1ebd g\u00e2y ra bi\u1ebfn d\u1ea1ng ho\u1eb7c v\u1ee1 \u1ed1ng Bourdon, m\u1eb7t s\u1ed1 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c, kim ch\u1ec9 b\u1ecb cong, v\u00e0 d\u1eabn \u0111\u1ebfn suy gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>Khi c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng th\u01b0\u1eddng xuy\u00ean h\u1ecfng h\u00f3c v\u00e0 g\u00e2y ra ngu\u1ed3n \u00e1p su\u1ea5t kh\u00f4ng \u1ed5n \u0111\u1ecbnh, ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb l\u1eafp \u0111\u1eb7t b\u1ed9 b\u1ea3o v\u1ec7 qu\u00e1 \u00e1p b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9. Thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u1ec3 ng\u1eaft k\u1ebft n\u1ed1i \u1edf ph\u1ea1m vi to\u00e0n thang \u0111o nh\u1eb1m tr\u00e1nh g\u00e2y h\u01b0 h\u1ecfng cho c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng.<br>Khi ngu\u1ed3n \u00e1p su\u1ea5t \u1ed5n \u0111\u1ecbnh nh\u01b0ng gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t v\u1eabn v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi to\u00e0n thang \u0111o, t\u1ed1t nh\u1ea5t n\u00ean ch\u1ecdn m\u1ed9t \u0111\u1ed3ng h\u1ed3 \u0111o m\u1edbi c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(d) T\u1eafc ngh\u1ebdn d\u1ee5ng c\u1ee5<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"922\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-922x1024.jpg\" alt=\"\" class=\"wp-image-2667\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-922x1024.jpg 922w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-270x300.jpg 270w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-768x853.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-1383x1536.jpg 1383w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-300x333.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals-600x666.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/05_SJ_pressure_transducer_with_diaphragm_seals.jpg 1773w\" sizes=\"(max-width: 922px) 100vw, 922px\" \/><figcaption class=\"wp-element-caption\">Vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch ly m\u00e0ng ng\u0103n gi\u00fap ng\u0103n ch\u1eb7n b\u1ea5t k\u1ef3 ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp n\u00e0o gi\u1eefa ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u00e0 \u1ed1ng Bourdon, t\u1eeb \u0111\u00f3 ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>Khi ch\u1ea5t l\u1ecfng \u0111\u00e3 qua x\u1eed l\u00fd c\u00f3 t\u00ednh k\u1ebft tinh cao (nh\u01b0 n\u01b0\u1edbc mu\u1ed1i), kh\u00f4ng tinh khi\u1ebft (nh\u01b0 n\u01b0\u1edbc th\u1ea3i v\u00e0 n\u01b0\u1edbc c\u1ed1ng) ho\u1eb7c qu\u00e1 \u0111\u1eb7c (nh\u01b0 latex v\u00e0 nh\u1ef1a \u0111\u01b0\u1eddng), \u1ed1ng Bourdon s\u1ebd b\u1ecb k\u1eb9t v\u00e0 c\u1ea3n tr\u1edf ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn b\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p b\u1ed9 l\u1ecdc ho\u1eb7c b\u1ed9 sealing m\u00e0ng \u0111\u1ec3 ch\u1eb7n c\u00e1c t\u1ea1p ch\u1ea5t. B\u1ed9 sealing m\u00e0ng c\u00f3 th\u1ec3 c\u00e1ch ly m\u00f4i tr\u01b0\u1eddng v\u1edbi \u1ed1ng Bourdon \u0111\u1ed3ng th\u1eddi duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c.<br>\u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a van m\u00e0ng, h\u00e3y xem b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i: \"Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0o n\u00ean t\u00edch h\u1ee3p van m\u00e0ng v\u00e0o \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u1ee7a b\u1ea1n.\".<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(e) S\u1ef1 \u0103n m\u00f2n c\u1ee7a thi\u1ebft b\u1ecb<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded-768x1024.png\" alt=\"\" class=\"wp-image-2668\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded-768x1024.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded-225x300.png 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded-300x400.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded-600x800.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/06_SJ_pressure_gauge_case_corroded.png 1108w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">V\u1ecf kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 pH cao ho\u1eb7c axit.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>Khi \u0111o c\u00e1c ch\u1ea5t l\u1ecfng c\u00f3 t\u00ednh \u0103n m\u00f2n cao (nh\u01b0 axit clohydric, axit nitric, amoniac v\u00e0 axit sunfuric), \u1ed1ng Bourdon c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n v\u00e0 c\u00f3 th\u1ec3 x\u1ea3y ra r\u00f2 r\u1ec9. \u0110i\u1ec1u n\u00e0y c\u0169ng c\u00f3 th\u1ec3 g\u00e2y nguy hi\u1ec3m cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>L\u1eafp \u0111\u1eb7t b\u1ed9 ph\u1eadn c\u00e1ch ly m\u00e0ng ho\u1eb7c ch\u1ecdn b\u1ed9 ph\u1eadn ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n t\u01b0\u01a1ng th\u00edch \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(f) L\u1ea1m d\u1ee5ng ho\u1eb7c s\u1eed d\u1ee5ng sai c\u00e1ch thi\u1ebft b\u1ecb<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-768x1024.png\" alt=\"\" class=\"wp-image-2669\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-768x1024.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-225x300.png 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-1152x1536.png 1152w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-1536x2048.png 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-300x400.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size-600x800.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_measuring_thread_size.png 1773w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">S\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1eb9p \u0111\u1ec3 \u0111o k\u00edch th\u01b0\u1edbc ren.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">L\u00fd do:<\/h4>\n\n\n\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t kh\u00f4ng \u0111\u00fang c\u00e1ch v\u00e0 s\u1eed d\u1ee5ng ren c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 g\u00e2y r\u00f2 r\u1ec9 ch\u1ea5t l\u1ecfng, l\u00e0m m\u1ea5t \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 g\u00e2y m\u00e0i m\u00f2n ren do si\u1ebft qu\u00e1 ch\u1eb7t.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p:<\/h4>\n\n\n\n<p>C\u1ea7n l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc, lo\u1ea1i v\u00e0 h\u00ecnh d\u1ea1ng ren ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t c\u00e1c thi\u1ebft b\u1ecb. H\u00e3y nh\u1edb s\u1eed d\u1ee5ng c\u1edd l\u00ea thay v\u00ec gi\u1eef v\u1ecf thi\u1ebft b\u1ecb khi l\u1eafp \u0111\u1eb7t v\u00e0 si\u1ebft ch\u1eb7t c\u00e1c thi\u1ebft b\u1ecb. Kh\u00f4ng \u0111\u01b0\u1ee3c leo l\u00ean \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t nh\u01b0 m\u1ed9t c\u00e1i thang sau khi l\u1eafp \u0111\u1eb7t \u0111\u1ec3 tr\u00e1nh g\u00e2y h\u01b0 h\u1ecfng kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c cho c\u00e1c thi\u1ebft b\u1ecb.<br>Ki\u1ec3m tra c\u00e1c \u0111i\u1ec3m an to\u00e0n quan tr\u1ecdng khi l\u1eafp \u0111\u1eb7t \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t \u0111\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-3cdf30fc140975318b230af30a184537\"><span class=\"ez-toc-section\" id=\"3regular-maintenance-and-servicing-of-pressure-gauges\"><\/span>3. B\u1ea3o d\u01b0\u1ee1ng v\u00e0 b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 c\u00e1c \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Hi\u1ec3u r\u00f5 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u1ec1 l\u1eafp \u0111\u1eb7t th\u00f4ng qua b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 gi\u1edbi thi\u1ec7u v\u00e0 l\u1ef1a ch\u1ecdn ren. Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 c\u00e1c thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c b\u1ed9 ph\u1eadn ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>SJ Gauge has many years of professional experience in measuring pressure and temperature. In this article, we will share with you how to interpret pressure gauges. We will also provide guidance on how to handle damaged pressure gauges. 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