{"id":6024,"date":"2026-10-02T02:04:43","date_gmt":"2026-10-01T18:04:43","guid":{"rendered":"https:\/\/www.sj-gauge.com\/?p=6024"},"modified":"2026-10-02T05:53:14","modified_gmt":"2026-10-01T21:53:14","slug":"pressure-gauge-thread-connection-leak","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/","title":{"rendered":"\u0110\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t b\u1ecb r\u00f2 r\u1ec9 sau khi l\u1eafp \u0111\u1eb7t? 5 b\u01b0\u1edbc ki\u1ec3m tra k\u1ebft n\u1ed1i"},"content":{"rendered":"<p>\u0110\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t b\u1ecb r\u00f2 r\u1ec9 kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng sau khi l\u1eafp \u0111\u1eb7t kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0 do b\u1ed9 ph\u1eadn \u0111o b\u1ecb l\u1ed7i. Ren kh\u00f4ng t\u01b0\u01a1ng th\u00edch, ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn kh\u00f4ng ch\u00ednh x\u00e1c, gio\u0103ng b\u1ecb h\u1ecfng ho\u1eb7c si\u1ebft ch\u1eb7t kh\u00f4ng \u0111\u00fang c\u00e1ch \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y r\u00f2 r\u1ec9 t\u1ea1i \u0111i\u1ec3m k\u1ebft n\u1ed1i. Th\u00eam b\u0103ng keo l\u00e0m k\u00edn ho\u1eb7c si\u1ebft ch\u1eb7t h\u01a1n c\u00f3 th\u1ec3 che gi\u1ea5u v\u1ea5n \u0111\u1ec1 m\u00e0 kh\u00f4ng kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c n\u00f3.<\/p>\n\n\n\n<p>Tr\u01b0\u1edbc khi ch\u1ea1m v\u00e0o ho\u1eb7c n\u1edbi l\u1ecfng m\u1ed1i n\u1ed1i, h\u00e3y ng\u1eebng t\u1ea1o \u00e1p su\u1ea5t, c\u00e1ch ly ngu\u1ed3n \u00e1p su\u1ea5t v\u00e0 l\u00e0m theo quy tr\u00ecnh c\u1ee7a thi\u1ebft b\u1ecb \u0111\u1ec3 gi\u1ea3m \u00e1p su\u1ea5t, x\u1ea3 v\u00e0 l\u00e0m m\u00e1t an to\u00e0n. Kh\u00f4ng si\u1ebft ch\u1eb7t m\u1ed1i n\u1ed1i b\u1ecb r\u00f2 r\u1ec9 khi \u0111ang c\u00f3 \u00e1p su\u1ea5t. Vi\u1ec7c \u0111\u00f3ng van c\u00e1ch ly c\u00f3 th\u1ec3 khi\u1ebfn \u00e1p su\u1ea5t b\u1ecb gi\u1eef l\u1ea1i \u1edf \u0111\u1ed3ng h\u1ed3 \u0111o; ch\u1ec9 s\u1ed1 kim ch\u1ec9 v\u1ec1 0 kh\u00f4ng ph\u1ea3i l\u00e0 b\u1eb1ng ch\u1ee9ng cho th\u1ea5y m\u1ed1i n\u1ed1i an to\u00e0n \u0111\u1ec3 m\u1edf.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\" style=\"width:640px;max-width:100%;margin:32px auto\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1448\" height=\"1086\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field.png\" alt=\"Pressure gauge and valve manifold connections on an industrial installation\" class=\"wp-image-6022\" sizes=\"(max-width: 640px) 100vw, 640px\" loading=\"eager\" style=\"display:block;width:100%;height:auto;aspect-ratio:3\/2;object-fit:cover;object-position:center 80%\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field.png 1448w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-300x225.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-1024x768.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-768x576.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-16x12.png 16w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-600x450.png 600w\" \/><figcaption class=\"wp-element-caption\" style=\"text-align:center\">H\u00ecnh 1 | H\u00ecnh \u1ea3nh l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf cho th\u1ea5y k\u1ebft n\u1ed1i \u0111\u1ed3ng h\u1ed3 \u0111o v\u00e0 c\u00e1c kh\u1edbp van li\u1ec1n k\u1ec1. H\u00ecnh \u1ea3nh minh h\u1ecda c\u00e1ch b\u1ed1 tr\u00ed, kh\u00f4ng ph\u1ea3i l\u00e0 h\u00ecnh \u1ea3nh r\u00f2 r\u1ec9 \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn.<\/figcaption><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 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-gauge-thread-connection-leak\/#1-confirm-that-the-thread-standards-match\" >1. X\u00e1c nh\u1eadn r\u1eb1ng ti\u00eau chu\u1ea9n ren kh\u1edbp nhau<\/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-gauge-thread-connection-leak\/#2-identify-where-the-connection-should-seal\" >2. X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ea7n b\u1ecbt k\u00edn m\u1ed1i n\u1ed1i.<\/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-gauge-thread-connection-leak\/#3-inspect-the-gasket-and-sealing-faces\" >3. Ki\u1ec3m tra gio\u0103ng v\u00e0 c\u00e1c b\u1ec1 m\u1eb7t l\u00e0m k\u00edn.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/#4-check-the-tape-or-thread-sealant\" >4. Ki\u1ec3m tra b\u0103ng keo ho\u1eb7c ch\u1ea5t l\u00e0m k\u00edn ren<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/#5-check-tightening-and-recommissioning\" >5. Ki\u1ec3m tra \u0111\u1ed9 si\u1ebft ch\u1eb7t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/#international-standards-to-check\" >Ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf c\u1ea7n ki\u1ec3m tra<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/#frequently-asked-questions\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-thread-connection-leak\/#correct-the-cause-before-returning-to-service\" >Kh\u1eafc ph\u1ee5c nguy\u00ean nh\u00e2n tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng tr\u1edf l\u1ea1i.<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"check-thread-standard\"><span class=\"ez-toc-section\" id=\"1-confirm-that-the-thread-standards-match\"><\/span>1. X\u00e1c nh\u1eadn r\u1eb1ng ti\u00eau chu\u1ea9n ren kh\u1edbp nhau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ki\u1ec3m tra k\u1ef9 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt k\u1ebft n\u1ed1i \u0111\u1ea7y \u0111\u1ee7 tr\u00ean c\u1ea3 \u0111\u1ed3ng h\u1ed3 \u0111o v\u00e0 kh\u1edbp n\u1ed1i: ti\u00eau chu\u1ea9n ren, k\u00edch th\u01b0\u1edbc danh ngh\u0129a v\u00e0 d\u1ea1ng ren ngo\u00e0i (\u0111\u1ea7u \u0111\u1ef1c ho\u1eb7c \u0111\u1ea7u c\u00e1i). C\u00e1c lo\u1ea1i ren NPT, R\/Rc\/Rp v\u00e0 G\/BSPP kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau ch\u1ec9 v\u00ec k\u00edch th\u01b0\u1edbc inch danh ngh\u0129a c\u1ee7a ch\u00fang tr\u00f4ng gi\u1ed1ng nhau. Ch\u1ec9 c\u1ea7n v\u1eb7n v\u00e0i v\u00f2ng kh\u00f4ng t\u1ea1o ra \u0111\u01b0\u1ee3c m\u1ed1i n\u1ed1i t\u01b0\u01a1ng th\u00edch ho\u1eb7c k\u00edn \u00e1p su\u1ea5t.<\/p>\n\n\n\n<p>Sau khi \u0111\u00e3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng an to\u00e0n, h\u00e3y ki\u1ec3m tra xem c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng v\u1eb7n l\u1ec7ch ren, \u0111\u1ec9nh ren b\u1ecb b\u1eb9p v\u00e0 c\u00e1c h\u01b0 h\u1ecfng kh\u00e1c hay kh\u00f4ng. Thay th\u1ebf c\u00e1c b\u1ed9 ph\u1eadn b\u1ecb h\u01b0 h\u1ecfng thay v\u00ec c\u1ed1 g\u1eafng v\u00e1 c\u00e1c khuy\u1ebft \u0111i\u1ec3m b\u1eb1ng b\u0103ng keo th\u1eeba. \u0110\u1ed1i v\u1edbi d\u1ee5ng c\u1ee5 thay th\u1ebf nh\u01b0... <a href=\"https:\/\/www.sj-gauge.com\/vi\/product\/prss\/\">\u0110\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 PRSS<\/a>, H\u00e3y x\u00e1c nh\u1eadn t\u00f9y ch\u1ecdn k\u1ebft n\u1ed1i \u0111\u00e3 \u0111\u1eb7t h\u00e0ng so v\u1edbi ph\u1ee5 ki\u1ec7n hi\u1ec7n c\u00f3 thay v\u00ec ch\u1ec9 ch\u1ecdn theo k\u00edch th\u01b0\u1edbc n\u00fam v\u1eb7n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-sealing-location\"><span class=\"ez-toc-section\" id=\"2-identify-where-the-connection-should-seal\"><\/span>2. X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ea7n b\u1ecbt k\u00edn m\u1ed1i n\u1ed1i.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00e1c m\u1ed1i n\u1ed1i c\u00f4n NPT th\u01b0\u1eddng s\u1eed d\u1ee5ng ch\u1ea5t l\u00e0m k\u00edn ren ho\u1eb7c b\u0103ng keo ph\u00f9 h\u1ee3p theo quy \u0111\u1ecbnh c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. C\u00e1c m\u1ed1i n\u1ed1i ISO 7-1 s\u1eed d\u1ee5ng ren c\u00f4n ngo\u00e0i R v\u1edbi ren c\u00f4n trong Rc ho\u1eb7c ren song song trong Rp, v\u1edbi \u0111\u1ed9 k\u00edn \u00e1p su\u1ea5t \u0111\u01b0\u1ee3c t\u1ea1o ra tr\u00ean ren. S\u1eed d\u1ee5ng s\u1ef1 k\u1ebft h\u1ee3p gh\u00e9p n\u1ed1i v\u00e0 v\u1eadt li\u1ec7u l\u00e0m k\u00edn \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/p>\n\n\n\n<p>C\u00e1c ren song song G\/BSPP theo ti\u00eau chu\u1ea9n ISO 228-1 kh\u00f4ng t\u1ea1o ra l\u1edbp \u0111\u1ec7m k\u00edn \u00e1p su\u1ea5t tr\u00ean ren. L\u1edbp \u0111\u1ec7m \u0111\u01b0\u1ee3c t\u1ea1o ra \u1edf n\u01a1i kh\u00e1c, v\u00ed d\u1ee5 nh\u01b0 b\u1eb1ng gio\u0103ng, v\u00f2ng ch\u1eef O ho\u1eb7c m\u1eb7t l\u00e0m k\u00edn \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf s\u1eb5n trong m\u1ed1i n\u1ed1i. Vi\u1ec7c qu\u1ea5n b\u0103ng keo quanh ren G kh\u00f4ng th\u1ec3 thay th\u1ebf cho l\u1edbp \u0111\u1ec7m k\u00edn \u0111\u1ea7u b\u1ecb thi\u1ebfu. \u0110\u1eb7c bi\u1ec7t, c\u1ea3 Rp v\u00e0 G \u0111\u1ec1u l\u00e0 c\u00e1c d\u1ea1ng ren trong song song, nh\u01b0ng h\u1ec7 th\u1ed1ng l\u00e0m k\u00edn c\u1ee7a ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c coi l\u00e0 gi\u1ed1ng nhau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-gasket-face\"><span class=\"ez-toc-section\" id=\"3-inspect-the-gasket-and-sealing-faces\"><\/span>3. Ki\u1ec3m tra gio\u0103ng v\u00e0 c\u00e1c b\u1ec1 m\u1eb7t l\u00e0m k\u00edn.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ed1i n\u1ed1i \u0111\u01b0\u1ee3c l\u00e0m k\u00edn b\u1eb1ng gio\u0103ng ho\u1eb7c v\u00f2ng ch\u1eef O, h\u00e3y ki\u1ec3m tra xem gio\u0103ng c\u00f3 \u0111\u1ea7y \u0111\u1ee7, \u0111\u00fang k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u0111\u00fang v\u1ecb tr\u00ed nh\u01b0 thi\u1ebft k\u1ebf hay kh\u00f4ng. Gio\u0103ng b\u1ecb thi\u1ebfu, b\u1ecb b\u1eb9p, b\u1ecb c\u1ee9ng ho\u1eb7c b\u1ecb h\u01b0 h\u1ecfng c\u00f3 th\u1ec3 g\u00e2y r\u00f2 r\u1ec9 ngay c\u1ea3 khi ren \u0111\u00e3 \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t ho\u00e0n to\u00e0n. B\u1ee5i b\u1ea9n, g\u1edd v\u00e0 v\u1ebft x\u01b0\u1edbc tr\u00ean b\u1ec1 m\u1eb7t l\u00e0m k\u00edn c\u0169ng c\u00f3 th\u1ec3 ng\u0103n c\u1ea3n s\u1ef1 ti\u1ebfp x\u00fac \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n<p>H\u00e3y ch\u1ecdn v\u1eadt li\u1ec7u l\u00e0m k\u00edn ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i ch\u1ea5t, \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a qu\u00e1 tr\u00ecnh, v\u00e0 thay th\u1ebf theo h\u01b0\u1edbng d\u1eabn b\u1ea3o tr\u00ec. Kh\u00f4ng \u0111\u01b0\u1ee3c x\u1ebfp ch\u1ed3ng c\u00e1c gio\u0103ng th\u1eeba ho\u1eb7c t\u00e1i s\u1eed d\u1ee5ng gio\u0103ng b\u1ecb h\u01b0 h\u1ecfng r\u00f5 r\u00e0ng \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho m\u1ed1i n\u1ed1i kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\" style=\"width:640px;max-width:100%;margin:32px auto\"><img loading=\"lazy\" decoding=\"async\" width=\"1108\" height=\"1477\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail.jpg\" alt=\"Rear pressure gauge connections and hexagonal fittings on a valve assembly\" class=\"wp-image-6023\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" style=\"display:block;width:100%;height:auto;aspect-ratio:3\/2;object-fit:cover;object-position:center 85%\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail.jpg 1108w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-225x300.jpg 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-768x1024.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-9x12.jpg 9w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-300x400.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-600x800.jpg 600w\" \/><figcaption class=\"wp-element-caption\" style=\"text-align:center\">H\u00ecnh 2 | Chi ti\u1ebft k\u1ebft n\u1ed1i t\u1eeb m\u1ed9t c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf. H\u00e3y x\u00e1c nh\u1eadn thi\u1ebft k\u1ebf ren v\u00e0 gio\u0103ng th\u1ef1c t\u1ebf tr\u01b0\u1edbc khi ch\u1ecdn gio\u0103ng ho\u1eb7c si\u1ebft ch\u1eb7t.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-sealing-material\"><span class=\"ez-toc-section\" id=\"4-check-the-tape-or-thread-sealant\"><\/span>4. Ki\u1ec3m tra b\u0103ng keo ho\u1eb7c ch\u1ea5t l\u00e0m k\u00edn ren<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Khi c\u1ea7n b\u1ecbt k\u00edn ren, h\u00e3y l\u00e0m theo h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ee5 ki\u1ec7n v\u00e0 ch\u1ea5t b\u1ecbt k\u00edn. H\u01b0\u1edbng qu\u1ea5n kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c qu\u00e1 \u00edt v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1eddng r\u00f2 r\u1ec9; v\u1eadt li\u1ec7u qu\u00e1 nhi\u1ec1u c\u00f3 th\u1ec3 c\u1ea3n tr\u1edf s\u1ef1 \u0103n kh\u1edbp ho\u1eb7c l\u1ecdt v\u00e0o c\u1ed5ng \u00e1p su\u1ea5t. Kh\u00f4ng c\u00f3 \u0111\u1ed9 d\u00e0y b\u0103ng keo ho\u1eb7c s\u1ed1 v\u00f2ng qu\u1ea5n n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi lo\u1ea1i ren v\u00e0 \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<p>Kh\u00f4ng n\u00ean cho r\u1eb1ng c\u00e1c ch\u1ea5t tr\u00e1m k\u00edn \u0111\u01b0\u1eddng \u1ed1ng th\u00f4ng th\u01b0\u1eddng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 oxy, ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m ho\u1eb7c h\u00f3a ch\u1ea5t. Ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi m\u00f4i tr\u01b0\u1eddng, \u0111\u1ed9 s\u1ea1ch v\u00e0 c\u00e1c ch\u1ee9ng nh\u1eadn c\u1ea7n thi\u1ebft, c\u0169ng nh\u01b0 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t. Lo\u1ea1i b\u1ecf c\u1eb7n tr\u00e1m k\u00edn c\u0169 trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n m\u00e0 kh\u00f4ng \u0111\u1ec3 m\u1ea3nh v\u1ee5n l\u1ecdt v\u00e0o thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-tightening\"><span class=\"ez-toc-section\" id=\"5-check-tightening-and-recommissioning\"><\/span>5. Ki\u1ec3m tra \u0111\u1ed9 si\u1ebft ch\u1eb7t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>S\u1eed d\u1ee5ng c\u00e1c m\u1eb7t ph\u1eb3ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh tr\u00ean kh\u1edbp n\u1ed1i; kh\u00f4ng xoay v\u1ecf \u0111\u1ed3ng h\u1ed3 \u0111o nh\u01b0 m\u1ed9t \u0111\u00f2n b\u1ea9y. Si\u1ebft kh\u00f4ng \u0111\u1ee7 c\u00f3 th\u1ec3 khi\u1ebfn kh\u1edbp n\u1ed1i kh\u00f4ng k\u00edn, trong khi d\u00f9ng l\u1ef1c qu\u00e1 m\u1ea1nh c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng ren, gio\u0103ng ho\u1eb7c \u0111\u1ea7u n\u1ed1i. S\u1eed d\u1ee5ng m\u00f4-men xo\u1eafn ho\u1eb7c quy tr\u00ecnh l\u1eafp r\u00e1p do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh cho v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf kh\u1edbp n\u1ed1i th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p>Sau khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, h\u00e3y ti\u1ebfn h\u00e0nh ki\u1ec3m tra r\u00f2 r\u1ec9 \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 quy tr\u00ecnh v\u1eadn h\u00e0nh tr\u1edf l\u1ea1i c\u00f3 ki\u1ec3m so\u00e1t. N\u1ebfu hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 t\u00e1i di\u1ec5n, h\u00e3y d\u1eebng l\u1ea1i v\u00e0 \u0111\u00e1nh gi\u00e1 l\u1ea1i m\u1ed1i n\u1ed1i thay v\u00ec li\u00ean t\u1ee5c si\u1ebft ch\u1eb7t. Trong tr\u01b0\u1eddng h\u1ee3p c\u1ea7n c\u00e1ch ly \u0111\u1ec3 b\u1ea3o tr\u00ec, h\u00e3y xem x\u00e9t m\u1ed9t ph\u1ee5 ki\u1ec7n ph\u00f9 h\u1ee3p nh\u01b0... <a href=\"https:\/\/www.sj-gauge.com\/vi\/product\/pra-bv\/\">Van \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t PRA-BV<\/a>; c\u00e1c gi\u1edbi h\u1ea1n k\u1ebft n\u1ed1i v\u00e0 d\u1ecbch v\u1ee5 c\u1ee7a n\u00f3 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng, v\u00e0 vi\u1ec7c c\u00e1ch ly v\u1eabn kh\u00f4ng lo\u1ea1i b\u1ecf \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t b\u1ecb gi\u1eef l\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"thread-standards\"><span class=\"ez-toc-section\" id=\"international-standards-to-check\"><\/span>Ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf c\u1ea7n ki\u1ec3m tra<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b1201-pipe-threads-general-purpose-inch\">ASME B1.20.1-2013 (R2018)<\/a>: K\u00edch th\u01b0\u1edbc v\u00e0 d\u1ee5ng c\u1ee5 \u0111o cho ren \u1ed1ng h\u1ec7 inch th\u00f4ng d\u1ee5ng, bao g\u1ed3m c\u1ea3 NPT. H\u1eefu \u00edch khi ki\u1ec3m tra h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc ren \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/20819.html\">ISO 7-1:1994<\/a>, v\u1edbi Cor.1:2007: ren \u1ed1ng d\u00f9ng cho c\u00e1c m\u1ed1i n\u1ed1i \u0111\u01b0\u1ee3c l\u00e0m k\u00edn b\u1eb1ng \u00e1p su\u1ea5t tr\u00ean ren, bao g\u1ed3m h\u1ec7 th\u1ed1ng R, Rc v\u00e0 Rp.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/33777.html\">ISO 228-1:2000<\/a>: ren \u1ed1ng n\u01a1i kh\u00f4ng c\u00f3 m\u1ed1i n\u1ed1i k\u00edn \u00e1p su\u1ea5t tr\u00ean ren. \u0110\u1ed1i v\u1edbi c\u00e1c m\u1ed1i n\u1ed1i G, h\u00e3y ki\u1ec3m tra b\u1ed1 tr\u00ed l\u00e0m k\u00edn ri\u00eang bi\u1ec7t.<\/li>\n<\/ul>\n\n\n\n<p>C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh h\u1ec7 th\u1ed1ng k\u1ebft n\u1ed1i; vi\u1ec7c tr\u00edch d\u1eabn ch\u00fang kh\u00f4ng ch\u1ee9ng nh\u1eadn s\u1ea3n ph\u1ea9m ho\u1eb7c thay th\u1ebf h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t v\u00e0 ki\u1ec3m tra r\u00f2 r\u1ec9 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb. H\u00e3y x\u00e1c nh\u1eadn phi\u00ean b\u1ea3n v\u00e0 y\u00eau c\u1ea7u \u00e1p d\u1ee5ng so v\u1edbi \u0111\u1eb7c t\u1ea3 d\u1ef1 \u00e1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"connection-leak-faq\"><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00f4i c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 r\u00f2 r\u1ec9 b\u1eb1ng c\u00e1ch si\u1ebft ch\u1eb7t th\u00eam n\u1eeda v\u00f2ng n\u1eefa kh\u00f4ng?<\/h3>\n\n\n\n<p>Kh\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t l\u1ea1i khi \u0111ang ch\u1ecbu \u00e1p l\u1ef1c. Tr\u01b0\u1edbc ti\u00ean h\u00e3y \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng an to\u00e0n, sau \u0111\u00f3 ki\u1ec3m tra \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch c\u1ee7a ren, ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn v\u00e0 t\u00ecnh tr\u1ea1ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn. L\u1ef1c si\u1ebft qu\u00e1 m\u1ea1nh c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng m\u1ed1i n\u1ed1i; m\u1ecdi thao t\u00e1c si\u1ebft ch\u1eb7t ti\u1ebfp theo ph\u1ea3i tu\u00e2n theo quy tr\u00ecnh c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gio\u0103ng c\u0169 c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c kh\u00f4ng?<\/h3>\n\n\n\n<p>H\u00e3y tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u b\u1ea3o d\u01b0\u1ee1ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t gio\u0103ng. Kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e1i s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp gio\u0103ng \u0111\u00e3 b\u1ecb n\u00e9n v\u0129nh vi\u1ec5n, c\u1ee9ng l\u1ea1i, n\u1ee9t ho\u1eb7c tr\u1ea7y x\u01b0\u1edbc. Gio\u0103ng thay th\u1ebf ph\u1ea3i c\u00f3 k\u00edch th\u01b0\u1edbc v\u00e0 ch\u1ea5t li\u1ec7u ch\u00ednh x\u00e1c, kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 h\u00ecnh th\u1ee9c t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vi\u1ec7c nh\u00ecn th\u1ea5y d\u1ea7u c\u00f3 ph\u1ea3i lu\u00f4n \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c m\u1ed1i n\u1ed1i trong quy tr\u00ecnh b\u1ecb r\u00f2 r\u1ec9?<\/h3>\n\n\n\n<p>Kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng v\u1eady. \u0110\u1ed1i v\u1edbi \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t ch\u1ee9a ch\u1ea5t l\u1ecfng, ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 \u0111\u1ebfn t\u1eeb v\u1ecf \u0111\u1ed3ng h\u1ed3, trong khi m\u00f4i ch\u1ea5t trong quy tr\u00ecnh c\u00f3 th\u1ec3 r\u00f2 r\u1ec9 t\u1ea1i \u0111i\u1ec3m k\u1ebft n\u1ed1i ho\u1eb7c b\u1ed9 ph\u1eadn b\u1ecb h\u01b0 h\u1ecfng kh\u00e1c. C\u1ea7n x\u00e1c \u0111\u1ecbnh ngu\u1ed3n r\u00f2 r\u1ec9 m\u1ed9t c\u00e1ch an to\u00e0n tr\u01b0\u1edbc khi l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p s\u1eeda ch\u1eefa; ch\u1ec9 d\u1ef1a v\u00e0o h\u00ecnh d\u1ea1ng c\u1ee7a ch\u1ea5t l\u1ecfng kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u1ed7i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"connection-leak-conclusion\"><span class=\"ez-toc-section\" id=\"correct-the-cause-before-returning-to-service\"><\/span>Kh\u1eafc ph\u1ee5c nguy\u00ean nh\u00e2n tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng tr\u1edf l\u1ea1i.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi r\u00f2 r\u1ec9 t\u1ea1i m\u1ed1i n\u1ed1i \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t, h\u00e3y th\u1ef1c hi\u1ec7n n\u0103m b\u01b0\u1edbc ki\u1ec3m tra: kh\u1edbp ren, v\u1ecb tr\u00ed l\u00e0m k\u00edn, t\u00ecnh tr\u1ea1ng gio\u0103ng, v\u1eadt li\u1ec7u l\u00e0m k\u00edn v\u00e0 \u0111\u1ed9 si\u1ebft ch\u1eb7t. Ghi l\u1ea1i ki\u1ec3u \u0111\u1ed3ng h\u1ed3 \u0111o, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt m\u1ed1i n\u1ed1i, m\u00f4i ch\u1ea5t, \u00e1p su\u1ea5t, nhi\u1ec7t \u0111\u1ed9 v\u00e0 ch\u1ee5p \u1ea3nh r\u00f5 n\u00e9t m\u1ed1i n\u1ed1i tr\u01b0\u1edbc khi y\u00eau c\u1ea7u h\u1ed7 tr\u1ee3 l\u1ef1a ch\u1ecdn ho\u1eb7c b\u1ea3o tr\u00ec.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sj-gauge.com\/vi\/contact\/\">Th\u1ea3o lu\u1eadn v\u1ec1 vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ee1 d\u00e2y v\u00e0 ki\u1ec3u k\u1ebft n\u1ed1i.<\/a><\/p>\n\n\n\n<p>B\u00e0i vi\u1ebft li\u00ean quan: <a href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-npt-pt-g-thread\/\">Ph\u00e2n bi\u1ec7t ren NPT, PT v\u00e0 G c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t: Ti\u00eau chu\u1ea9n ren v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>A pressure gauge leaking gas or liquid after installation does not necessarily have a faulty measuring element. Incompatible threads, an incorrect sealing method, a damaged gasket or improper tightening can all cause leakage at the process connection. Adding more sealing tape or tightening harder may hide the problem without correcting it. Before touching or loosening [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6022,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[71],"class_list":["post-6024","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pressure"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pressure Gauge Connection Leaks: 5 Checks | SJ Gauge<\/title>\n<meta name=\"description\" content=\"Pressure gauge leaking after installation? 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