{"id":5437,"date":"2026-07-29T19:25:58","date_gmt":"2026-07-29T11:25:58","guid":{"rendered":"https:\/\/www.sj-gauge.com\/?p=5437"},"modified":"2026-07-29T21:16:53","modified_gmt":"2026-07-29T13:16:53","slug":"pressure-gauge-npt-pt-g-thread","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-npt-pt-g-thread\/","title":{"rendered":"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"},"content":{"rendered":"<p>\u0110\u1ea7u n\u1ed1i qu\u00e1 tr\u00ecnh c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t th\u01b0\u1eddng s\u1eed d\u1ee5ng ren NPT, G\/BSPP ho\u1eb7c lo\u1ea1i ren th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi tr\u00ean th\u1ecb tr\u01b0\u1eddng l\u00e0 PT. D\u00f9 c\u00f3 h\u00ecnh th\u1ee9c g\u1ea7n gi\u1ed1ng nhau, c\u00e1c \u0111\u1ea7u n\u1ed1i n\u00e0y v\u1eabn c\u00f3 th\u1ec3 kh\u00e1c v\u1ec1 \u0111\u1ed9 c\u00f4n, bi\u00ean d\u1ea1ng ren, b\u01b0\u1edbc ren v\u00e0 v\u1ecb tr\u00ed l\u00e0m k\u00edn.<\/p>\n\n\n\n<p>Ch\u1ecdn sai lo\u1ea1i ren c\u00f3 th\u1ec3 khi\u1ebfn \u0111\u1ea7u n\u1ed1i kh\u00f4ng si\u1ebft \u0111\u00fang, l\u00e0m h\u1ecfng ren ho\u1eb7c g\u00e2y r\u00f2 r\u1ec9. H\u01b0\u1edbng d\u1eabn n\u00e0y so s\u00e1nh ba nh\u00f3m ren ph\u1ed5 bi\u1ebfn v\u00e0 n\u00eau r\u00f5 nh\u1eefng th\u00f4ng tin c\u1ea7n x\u00e1c nh\u1eadn tr\u01b0\u1edbc khi \u0111\u1eb7t mua \u0111\u1ed3ng h\u1ed3 thay th\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge.webp\" alt=\"SJ pressure gauge with exposed male process connection thread\" class=\"wp-image-5434\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge.webp 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge-300x200.webp 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge-1024x683.webp 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge-768x512.webp 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge-18x12.webp 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-npt-pt-g-thread-comparison-sj-gauge-600x400.webp 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><figcaption class=\"wp-element-caption\">\u0110\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t SJ v\u1edbi \u0111\u1ea7u n\u1ed1i qu\u00e1 tr\u00ecnh ren ngo\u00e0i \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n r\u00f5.<\/figcaption><\/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-gauge-npt-pt-g-thread\/#npt-vs-pt-vs-g-threads-quick-comparison\" >So s\u00e1nh nhanh ren NPT, PT v\u00e0 G<\/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-npt-pt-g-thread\/#what-is-an-npt-pressure-gauge-thread\" >Ren NPT c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t l\u00e0 g\u00ec?<\/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-npt-pt-g-thread\/#why-does-a-gbspp-thread-need-a-washer-or-o-ring\" >V\u00ec sao ren G\/BSPP c\u1ea7n v\u00f2ng \u0111\u1ec7m ho\u1eb7c O-ring?<\/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-npt-pt-g-thread\/#can-a-pt-thread-be-connected-directly-to-npt\" >C\u00f3 th\u1ec3 n\u1ed1i tr\u1ef1c ti\u1ebfp ren PT v\u1edbi NPT kh\u00f4ng?<\/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-npt-pt-g-thread\/#international-standards-reference\" >Tham kh\u1ea3o ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf<\/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-npt-pt-g-thread\/#how-to-identify-the-thread-on-an-existing-pressure-gauge\" >C\u00e1ch x\u00e1c \u0111\u1ecbnh lo\u1ea1i ren tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t hi\u1ec7n c\u00f3<\/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-npt-pt-g-thread\/#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-npt-pt-g-thread\/#conclusion\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-npt-vs-pt-vs-g-threads-quick-comparison\"><span class=\"ez-toc-section\" id=\"npt-vs-pt-vs-g-threads-quick-comparison\"><\/span>So s\u00e1nh nhanh ren NPT, PT v\u00e0 G<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Lo\u1ea1i ren<\/th><th>Bi\u00ean d\u1ea1ng ren<\/th><th>Ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn th\u00f4ng d\u1ee5ng<\/th><th>\u0110i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi l\u1ef1a ch\u1ecdn<\/th><\/tr><\/thead><tbody><tr><td><strong>NPT<\/strong><\/td><td>Ren \u1ed1ng c\u00f4n<\/td><td>D\u00f9ng ch\u1ea5t l\u00e0m k\u00edn ren t\u01b0\u01a1ng th\u00edch ho\u1eb7c b\u0103ng PTFE tr\u00ean ph\u1ea7n ren<\/td><td>Ph\u1ed5 bi\u1ebfn tr\u00ean thi\u1ebft b\u1ecb theo ti\u00eau chu\u1ea9n B\u1eafc M\u1ef9<\/td><\/tr><tr><td><strong>G \/ BSPP<\/strong><\/td><td>Ren \u1ed1ng song song<\/td><td>L\u00e0m k\u00edn b\u1eb1ng v\u00f2ng \u0111\u1ec7m, v\u00f2ng \u0111\u1ec7m li\u00ean k\u1ebft ho\u1eb7c O-ring t\u1ea1i m\u1eb7t ti\u1ebfp x\u00fac<\/td><td>Ph\u1ed5 bi\u1ebfn tr\u00ean thi\u1ebft b\u1ecb t\u1ea1i ch\u00e2u \u00c1 v\u00e0 ch\u00e2u \u00c2u<\/td><\/tr><tr><td><strong>Lo\u1ea1i PT \/ R<\/strong><\/td><td>Th\u01b0\u1eddng l\u00e0 t\u00ean g\u1ecdi th\u01b0\u01a1ng m\u1ea1i c\u1ee7a ren \u1ed1ng c\u00f4n<\/td><td>L\u00e0m k\u00edn t\u1ea1i ph\u1ea7n ren<\/td><td>C\u1ea7n x\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n th\u1ef1c t\u1ebf v\u00e0 ren \u0111\u1ef1c\/ren c\u00e1i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-background\" style=\"background-color:#eef4f7;padding-top:18px;padding-right:20px;padding-bottom:18px;padding-left:20px\"><strong>L\u01b0u \u00fd quan tr\u1ecdng:<\/strong> K\u00edch th\u01b0\u1edbc danh ngh\u0129a nh\u01b0 \u201c1\/4 inch\u201d kh\u00f4ng x\u00e1c \u0111\u1ecbnh ti\u00eau chu\u1ea9n ren. \u0110\u1ea7u n\u1ed1i 1\/4 NPT kh\u00f4ng m\u1eb7c nhi\u00ean t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u1ea7u n\u1ed1i G 1\/4 ho\u1eb7c PT.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back.webp\" alt=\"SJ pressure gauges shown from front and back with exposed threaded process connections\" class=\"wp-image-5435\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back.webp 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back-300x200.webp 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back-1024x683.webp 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back-768x512.webp 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back-18x12.webp 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/sj-pressure-gauge-process-connection-threads-front-back-600x400.webp 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><figcaption class=\"wp-element-caption\">M\u1eb7t tr\u01b0\u1edbc v\u00e0 m\u1eb7t sau c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t SJ v\u1edbi ph\u1ea7n ren k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n r\u00f5.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-an-npt-pressure-gauge-thread\"><span class=\"ez-toc-section\" id=\"what-is-an-npt-pressure-gauge-thread\"><\/span>Ren NPT c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>NPT l\u00e0 ren \u1ed1ng c\u00f4n. Ren \u0111\u1ef1c v\u00e0 ren c\u00e1i si\u1ebft d\u1ea7n khi l\u1eafp, \u0111\u1ed3ng th\u1eddi th\u01b0\u1eddng c\u1ea7n ch\u1ea5t l\u00e0m k\u00edn ren t\u01b0\u01a1ng th\u00edch ho\u1eb7c b\u0103ng PTFE \u0111\u1ec3 b\u1ecbt \u0111\u01b0\u1eddng r\u00f2 theo xo\u1eafn ren.<\/p>\n\n\n\n<p>Sau khi l\u1eafp v\u1eabn nh\u00ecn th\u1ea5y v\u00e0i v\u00f2ng ren kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ea7u n\u1ed1i b\u1ecb l\u1ecfng. M\u1ee9c \u0103n ren \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc, dung sai v\u00e0 y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t. Si\u1ebft qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 l\u00e0m n\u1ee9t ph\u1ee5 ki\u1ec7n, bi\u1ebfn d\u1ea1ng \u0111\u1ea7u n\u1ed1i c\u1ee7a \u0111\u1ed3ng h\u1ed3 ho\u1eb7c h\u1ecfng ren.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-does-a-g-bspp-thread-need-a-washer-or-o-ring\"><span class=\"ez-toc-section\" id=\"why-does-a-gbspp-thread-need-a-washer-or-o-ring\"><\/span>V\u00ec sao ren G\/BSPP c\u1ea7n v\u00f2ng \u0111\u1ec7m ho\u1eb7c O-ring?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ren G, c\u00f2n g\u1ecdi l\u00e0 BSPP, l\u00e0 ren song song ch\u1ee9 kh\u00f4ng ph\u1ea3i ren c\u00f4n. Lo\u1ea1i ren n\u00e0y th\u01b0\u1eddng kh\u00f4ng l\u00e0m k\u00edn b\u1eb1ng c\u00e1ch \u00e9p ch\u1eb7t ren \u0111\u1ef1c v\u00e0 ren c\u00e1i, m\u00e0 t\u1ea1o k\u00edn \u00e1p su\u1ea5t t\u1ea1i m\u1eb7t ti\u1ebfp x\u00fac b\u1eb1ng v\u00f2ng \u0111\u1ec7m, bonded seal ho\u1eb7c O-ring.<\/p>\n\n\n\n<p>N\u1ebfu b\u1ed9 ph\u1eadn l\u00e0m k\u00edn b\u1ecb thi\u1ebfu, h\u01b0 h\u1ecfng ho\u1eb7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi m\u00f4i ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9, \u0111\u1ea7u n\u1ed1i v\u1eabn c\u00f3 th\u1ec3 r\u00f2 r\u1ec9 d\u00f9 qu\u1ea5n th\u00eam b\u0103ng PTFE. V\u1edbi ren G, c\u1ea7n ki\u1ec3m tra m\u1eb7t l\u00e0m k\u00edn v\u00e0 ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u gio\u0103ng thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o ph\u1ea7n ren.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection.webp\" alt=\"Stainless steel threaded adapter for a pressure gauge process connection\" class=\"wp-image-5436\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection.webp 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection-300x200.webp 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection-1024x683.webp 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection-768x512.webp 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection-18x12.webp 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/07\/pressure-gauge-thread-adapter-npt-pt-g-connection-600x400.webp 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><figcaption class=\"wp-element-caption\">\u0110\u1ea7u chuy\u1ec3n ren b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 d\u00f9ng cho \u0111\u1ea7u n\u1ed1i \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-can-a-pt-thread-be-connected-directly-to-npt\"><span class=\"ez-toc-section\" id=\"can-a-pt-thread-be-connected-directly-to-npt\"><\/span>C\u00f3 th\u1ec3 n\u1ed1i tr\u1ef1c ti\u1ebfp ren PT v\u1edbi NPT kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Kh\u00f4ng n\u00ean gh\u00e9p tr\u1ef1c ti\u1ebfp ren PT\/R v\u1edbi NPT. Hai lo\u1ea1i c\u00f3 th\u1ec3 \u0103n v\u00e0o v\u00e0i v\u00f2ng \u0111\u1ea7u nh\u01b0ng bi\u00ean d\u1ea1ng, b\u01b0\u1edbc ren v\u00e0 ti\u00eau chu\u1ea9n k\u00edch th\u01b0\u1edbc kh\u00f4ng nh\u1ea5t thi\u1ebft t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ch\u00e9o ren ho\u1eb7c h\u01b0 h\u1ecfng s\u01b0\u1eddn ren<\/li>\n\n\n\n<li>X\u01b0\u1edbc d\u00ednh ho\u1eb7c k\u1eb9t ren khi l\u1eafp \u0111\u1eb7t<\/li>\n\n\n\n<li>\u0102n ren kh\u00f4ng \u0111\u1ee7 v\u00e0 gi\u1ea3m \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc<\/li>\n\n\n\n<li>V\u1eabn c\u00f2n \u0111\u01b0\u1eddng r\u00f2 d\u00f9 \u0111\u00e3 d\u00f9ng ch\u1ea5t l\u00e0m k\u00edn<\/li>\n<\/ul>\n\n\n\n<p>Khi c\u1ea7n \u0111\u1ea7u chuy\u1ec3n, ph\u1ea3i ch\u1ec9 \u0111\u1ecbnh ri\u00eang hai \u0111\u1ea7u, v\u00ed d\u1ee5: ren ngo\u00e0i 1\/4 NPT sang ren trong G 1\/4, \u0111\u1ed3ng th\u1eddi x\u00e1c nh\u1eadn c\u1ea5p \u00e1p su\u1ea5t, v\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-international-standards-reference\"><span class=\"ez-toc-section\" id=\"international-standards-reference\"><\/span>Tham kh\u1ea3o ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf<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\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ASME B1.20.1-2013 (R2018)<\/strong><\/a>: quy \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 y\u00eau c\u1ea7u ki\u1ec3m tra b\u1eb1ng d\u01b0\u1ee1ng \u0111\u1ed1i v\u1edbi NPT v\u00e0 c\u00e1c lo\u1ea1i ren \u1ed1ng h\u1ec7 inch li\u00ean quan.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/20819.html\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ISO 7-1:1994<\/strong><\/a>, c\u00f9ng v\u1edbi <a href=\"https:\/\/www.iso.org\/standard\/46479.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u0110\u00ednh ch\u00ednh k\u1ef9 thu\u1eadt 1:2007<\/a>: \u00e1p d\u1ee5ng cho ren \u1ed1ng R, Rc v\u00e0 Rp, trong \u0111\u00f3 m\u1ed1i n\u1ed1i k\u00edn \u00e1p su\u1ea5t \u0111\u01b0\u1ee3c t\u1ea1o t\u1ea1i ph\u1ea7n ren.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/33777.html\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ISO 228-1:2000<\/strong><\/a>: quy \u0111\u1ecbnh ren \u1ed1ng song song k\u00fd hi\u1ec7u G; m\u1ed1i n\u1ed1i k\u00edn \u00e1p su\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ea1o ch\u1ec9 b\u1eb1ng ph\u1ea7n ren.<\/li>\n\n\n\n<li><a href=\"https:\/\/webdesk.jsa.or.jp\/books\/W11M0090\/?bunsyo_id=JIS+B+0203%3A1999\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>JIS B 0203:1999<\/strong><\/a>: ren \u1ed1ng c\u00f4n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong th\u1ef1c h\u00e0nh c\u00f4ng nghi\u1ec7p Nh\u1eadt B\u1ea3n.<\/li>\n<\/ul>\n\n\n\n<p><em>C\u1ea7n x\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng, t\u00ecnh tr\u1ea1ng phi\u00ean b\u1ea3n v\u00e0 y\u00eau c\u1ea7u ch\u1ee9ng nh\u1eadn cho t\u1eebng d\u1ef1 \u00e1n. Vi\u1ec7c vi\u1ec7n d\u1eabn ti\u00eau chu\u1ea9n kh\u00f4ng \u0111\u1ed3ng ngh\u0129a \u0111\u1ed3ng h\u1ed3 ho\u1eb7c \u0111\u1ea7u n\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-identify-the-thread-on-an-existing-pressure-gauge\"><span class=\"ez-toc-section\" id=\"how-to-identify-the-thread-on-an-existing-pressure-gauge\"><\/span>C\u00e1ch x\u00e1c \u0111\u1ecbnh lo\u1ea1i ren tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t hi\u1ec7n c\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ki\u1ec3m tra model, t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt, h\u1ed3 s\u01a1 mua h\u00e0ng ho\u1eb7c k\u00fd hi\u1ec7u tr\u00ean \u0111\u1ea7u n\u1ed1i \u0111\u1ed3ng h\u1ed3.<\/li>\n\n\n\n<li>\u0110o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren b\u1eb1ng th\u01b0\u1edbc c\u1eb7p ph\u00f9 h\u1ee3p.<\/li>\n\n\n\n<li>\u0110o b\u01b0\u1edbc ren b\u1eb1ng d\u01b0\u1ee1ng \u0111o b\u01b0\u1edbc ren thay v\u00ec \u01b0\u1edbc l\u01b0\u1ee3ng t\u1eeb \u1ea3nh.<\/li>\n\n\n\n<li>Ki\u1ec3m tra ren l\u00e0 lo\u1ea1i song song hay c\u00f4n.<\/li>\n\n\n\n<li>X\u00e1c nh\u1eadn \u0111\u1ea7u n\u1ed1i ren \u0111\u1ef1c\/ren c\u00e1i v\u00e0 v\u1ecb tr\u00ed c\u1ee7a b\u1ed9 ph\u1eadn l\u00e0m k\u00edn.<\/li>\n<\/ol>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb quan tr\u1ecdng v\u1ec1 an to\u00e0n, h\u00e3y x\u00e1c nh\u1eadn \u0111\u1ea7u n\u1ed1i b\u1eb1ng d\u01b0\u1ee1ng ren, b\u1ea3n v\u1ebd \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ho\u1eb7c th\u00f4ng s\u1ed1 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\"><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\" id=\"h-can-i-identify-a-pressure-gauge-thread-from-a-photo\">C\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh ren \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t ch\u1ec9 t\u1eeb \u1ea3nh kh\u00f4ng?<\/h3>\n\n\n\n<p>\u1ea2nh c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 s\u00e0ng l\u1ecdc ban \u0111\u1ea7u, nh\u1ea5t l\u00e0 khi th\u1ec3 hi\u1ec7n \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1eb7t l\u00e0m k\u00edn. Tuy nhi\u00ean, \u1ea3nh kh\u00f4ng th\u1ec3 x\u00e1c nh\u1eadn \u0111\u00e1ng tin c\u1eady b\u01b0\u1edbc ren, \u0111\u1ed9 c\u00f4n ho\u1eb7c ti\u00eau chu\u1ea9n ren. Khi h\u1ecfi mua s\u1ea3n ph\u1ea9m thay th\u1ebf, h\u00e3y cung c\u1ea5p model c\u0169 v\u00e0 k\u00edch th\u01b0\u1edbc \u0111o th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-is-1-4-npt-the-same-size-as-g-1-4\">1\/4 NPT c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u1edbi G 1\/4 kh\u00f4ng?<\/h3>\n\n\n\n<p>Kh\u00f4ng. C\u1ea3 hai \u0111\u1ec1u d\u00f9ng k\u00edch th\u01b0\u1edbc danh ngh\u0129a 1\/4 inch nh\u01b0ng tu\u00e2n theo ti\u00eau chu\u1ea9n ren v\u00e0 nguy\u00ean l\u00fd l\u00e0m k\u00edn kh\u00e1c nhau. Kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 d\u1ef1a v\u00e0o k\u00edch th\u01b0\u1edbc danh ngh\u0129a \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-should-ptfe-tape-be-used-on-a-g-thread\">C\u00f3 n\u00ean d\u00f9ng b\u0103ng PTFE tr\u00ean ren G kh\u00f4ng?<\/h3>\n\n\n\n<p>\u0110\u1ea7u n\u1ed1i G\/BSPP th\u01b0\u1eddng l\u00e0m k\u00edn b\u1eb1ng v\u00f2ng \u0111\u1ec7m, bonded seal ho\u1eb7c O-ring t\u1ea1i m\u1eb7t ti\u1ebfp x\u00fac. B\u0103ng PTFE tr\u00ean ren kh\u00f4ng th\u1ec3 thay th\u1ebf b\u1ed9 ph\u1eadn l\u00e0m k\u00edn \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ren NPT, PT\/R v\u00e0 G\/BSPP tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t kh\u00e1c nhau v\u1ec1 h\u00ecnh h\u1ecdc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn. Tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng, h\u00e3y x\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n ren, k\u00edch th\u01b0\u1edbc danh ngh\u0129a, c\u1ea5u h\u00ecnh \u0111\u1ef1c\/c\u00e1i v\u00e0 v\u1ecb tr\u00ed l\u00e0m k\u00edn \u0111\u1ec3 tr\u00e1nh r\u00f2 r\u1ec9, ch\u00e9o ren v\u00e0 thay th\u1ebf kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-8400acc9 wp-block-group-is-layout-constrained\" style=\"background-color:#f3f7f9;padding-top:24px;padding-right:28px;padding-bottom:24px;padding-left:28px\">\n<h3 class=\"wp-block-heading\" id=\"h-need-help-confirming-an-existing-connection\">C\u1ea7n h\u1ed7 tr\u1ee3 x\u00e1c nh\u1eadn \u0111\u1ea7u n\u1ed1i hi\u1ec7n c\u00f3?<\/h3>\n\n\n\n<p>H\u00e3y g\u1eedi cho SJ Gauge model \u0111\u1ed3ng h\u1ed3 c\u0169, \u1ea3nh r\u00f5 \u0111\u1ea7u n\u1ed1i v\u00e0 k\u00edch th\u01b0\u1edbc ren \u0111\u00e3 \u0111o. \u0110\u1ed9i ng\u0169 c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 x\u00e1c \u0111\u1ecbnh \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u1ea5u h\u00ecnh \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.sj-gauge.com\/vi\/contact\/\">Li\u00ean h\u1ec7 SJ Gauge<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<p><strong>B\u00e0i vi\u1ebft li\u00ean quan:<\/strong> <a href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/\">Ti\u00eau chu\u1ea9n ren cho thi\u1ebft b\u1ecb \u0111o c\u00f4ng nghi\u1ec7p: C\u00e1ch x\u00e1c \u0111\u1ecbnh \u0111\u00fang \u0111\u1ea7u n\u1ed1i<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Ren NPT, PT\/R v\u00e0 G\/BSPP tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng nhau nh\u01b0ng kh\u00e1c v\u1ec1 \u0111\u1ed9 c\u00f4n, b\u01b0\u1edbc ren v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn. B\u00e0i vi\u1ebft n\u00e0y so s\u00e1nh c\u00e1c ti\u00eau chu\u1ea9n v\u00e0 h\u01b0\u1edbng d\u1eabn c\u00e1ch tr\u00e1nh r\u00f2 r\u1ec9, ch\u00e9o ren v\u00e0 h\u01b0 h\u1ecfng \u0111\u1ea7u n\u1ed1i.<\/p>","protected":false},"author":2,"featured_media":5434,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[73],"class_list":["post-5437","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-knowledge"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pressure Gauge NPT vs PT vs G Threads | SJ Gauge<\/title>\n<meta name=\"description\" content=\"Compare NPT, PT\/R and G\/BSPP pressure gauge threads by taper, thread standard and sealing method to avoid leaks and damaged connections.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-npt-pt-g-thread\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pressure Gauge NPT vs PT vs G Threads: Differences and Sealing Methods\" \/>\n<meta property=\"og:description\" content=\"Compare NPT, PT\/R and G\/BSPP pressure gauge threads by taper, thread standard and sealing method to avoid leaks and damaged connections.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sj-gauge.com\/vi\/pressure-gauge-npt-pt-g-thread\/\" \/>\n<meta property=\"og:site_name\" content=\"SJ Gauge | Pressure Gauges, Thermometers &amp; 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