{"id":3699,"date":"2025-12-08T09:16:12","date_gmt":"2025-12-08T09:16:12","guid":{"rendered":"https:\/\/hfittings.com\/understanding-3-inch-sch20-elbow-long-vs-short-radius\/"},"modified":"2025-12-08T09:16:12","modified_gmt":"2025-12-08T09:16:12","slug":"understanding-3-inch-sch20-elbow-long-vs-short-radius","status":"publish","type":"post","link":"https:\/\/hfittings.com\/vi\/understanding-3-inch-sch20-elbow-long-vs-short-radius\/","title":{"rendered":"C\u00fat 3 inch Sch20: So s\u00e1nh gi\u1eefa c\u00fat b\u00e1n k\u00ednh d\u00e0i v\u00e0 c\u00fat b\u00e1n k\u00ednh ng\u1eafn"},"content":{"rendered":"<p><figure loading=\"lazy\" class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/hfittings.com\/wp-content\/uploads\/2025\/12\/b5e2930c-0b37-4d6a-91ea-de82a34ab26b.png\" alt=\"C\u00fat \u1ed1ng th\u00e9p SCH20 \u0111\u01b0\u1eddng k\u00ednh 3 inch - Ngh\u1ec7 thu\u1eadt s\u1ed1\" style=\"display: block; margin-block: 10px;\"><\/figure>\n<\/p>\n<h2>\u0110i\u1ec3m nh\u1ea5n ch\u00ednh<\/h2>\n<ul>\n<li>C\u00fat 3 inch SCH20 l\u00e0 m\u1ed9t ph\u1ee5 ki\u1ec7n \u1ed1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thay \u0111\u1ed5i h\u01b0\u1edbng trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn \u00e1p su\u1ea5t th\u1ea5p. C\u00e1c lo\u1ea1i ch\u00ednh bao g\u1ed3m c\u00fat b\u00e1n k\u00ednh d\u00e0i cho d\u00f2ng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 c\u00fat b\u00e1n k\u00ednh ng\u1eafn cho c\u00e1c \u1ee9ng d\u1ee5ng trong kh\u00f4ng gian h\u1eb9p. C\u00e1c g\u00f3c cong SCH20 kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t cao, v\u00ec ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn \u00e1p su\u1ea5t th\u1ea5p, v\u00e0 \u00e1p su\u1ea5t cao h\u01a1n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng l\u1edbn h\u01a1n v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n ph\u1ee5 ki\u1ec7n \u1ed1ng kh\u00e1c. Do \u0111\u00f3, c\u00e1c g\u00f3c cong SCH20 b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 3 inch kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t cao; thi\u1ebft k\u1ebf th\u00e0nh \u1ed1ng m\u1ecfng c\u1ee7a ch\u00fang kh\u00f4ng cung c\u1ea5p \u0111\u1ed9 b\u1ec1n c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u1eed l\u00fd an to\u00e0n c\u00e1c m\u1ee9c \u00e1p su\u1ea5t cao.<\/li>\n<li>C\u00e1c lo\u1ea1i ch\u00ednh bao g\u1ed3m lo\u1ea1i b\u00e1n k\u00ednh d\u00e0i cho d\u00f2ng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 lo\u1ea1i b\u00e1n k\u00ednh ng\u1eafn cho c\u00e1c \u1ee9ng d\u1ee5ng trong kh\u00f4ng gian h\u1eb9p.<\/li>\n<li>C\u00e1c v\u1eadt li\u1ec7u th\u00f4ng d\u1ee5ng bao g\u1ed3m th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n v\u00e0 th\u00e9p carbon \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 s\u1eed d\u1ee5ng chung.<\/li>\n<li>Ph\u1ee5 l\u1ee5c 20 (SCH20) quy \u0111\u1ecbnh \u0111\u1ed9 d\u00e0y t\u01b0\u1eddng c\u1ee5 th\u1ec3 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t th\u1ea5p.<\/li>\n<li>Vi\u1ec7c l\u1ef1a ch\u1ecdn kh\u1edbp n\u1ed1i ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o \u00e1p su\u1ea5t h\u1ec7 th\u1ed1ng, kh\u00f4ng gian v\u00e0 ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c v\u1eadn chuy\u1ec3n.<\/li>\n<li>Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ASME v\u00e0 ASTM \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a ph\u1ee5 ki\u1ec7n \u1ed1ng.<\/li>\n<\/ul>\n<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>Ch\u00e0o m\u1eebng \u0111\u1ebfn v\u1edbi h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 c\u00fat 3 inch SCH20. N\u1ebfu b\u1ea1n tham gia v\u00e0o b\u1ea5t k\u1ef3 d\u1ef1 \u00e1n \u1ed1ng d\u1eabn n\u00e0o, b\u1ea1n \u0111\u1ec1u bi\u1ebft r\u1eb1ng m\u1ed7i ph\u1ee5 ki\u1ec7n \u1ed1ng \u0111\u1ec1u quan tr\u1ecdng. C\u00fat g\u00f3c 3 inch SCH20 n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 thay \u0111\u1ed5i h\u01b0\u1edbng d\u00f2ng ch\u1ea3y trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn. Tuy nhi\u00ean, s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00fat g\u00f3c b\u00e1n k\u00ednh d\u00e0i v\u00e0 c\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn l\u00e0 g\u00ec? Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng \u0111\u1ec3 thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i th\u00edch m\u1ecdi \u0111i\u1ec1u b\u1ea1n c\u1ea7n bi\u1ebft v\u1ec1 th\u00e0nh ph\u1ea7n th\u00e9p kh\u00f4ng g\u1ec9 quan tr\u1ecdng n\u00e0y.<\/p>\n<h2>T\u1ed5ng quan v\u1ec1 \u1ed1ng cong 3 inch SCH20 v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang<\/h2>\n<p>C\u00fat g\u00f3c 3 inch SCH20 l\u00e0 m\u1ed9t lo\u1ea1i ph\u1ee5 ki\u1ec7n \u1ed1ng th\u00e9p c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng d\u00f2ng ch\u1ea3y c\u1ee7a \u1ed1ng d\u1eabn. Lo\u1ea1i c\u00fat g\u00f3c n\u00e0y cho ph\u00e9p t\u1ea1o c\u00e1c kh\u00fac cua, v\u01b0\u1ee3t qua ch\u01b0\u1edbng ng\u1ea1i v\u1eadt v\u00e0 x\u00e2y d\u1ef1ng c\u00e1c b\u1ed1 tr\u00ed ph\u1ee9c t\u1ea1p h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n \u0111\u01b0\u1eddng \u0111i c\u1ee7a ch\u1ea5t l\u1ecfng. Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 k\u1ebft n\u1ed1i c\u00e1c \u1ed1ng th\u1eb3ng \u1edf g\u00f3c nghi\u00eang, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh th\u00e0nh ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn n\u00e0o.<\/p>\n<p>Ph\u1ea7n \u201cSCH20\u201d trong t\u00ean g\u1ecdi c\u1ee7a n\u00f3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111\u1ed9 d\u00e0y c\u1ee7a th\u00e0nh \u1ed1ng, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u00f4i tr\u01b0\u1eddng \u00e1p su\u1ea5t th\u1ea5p. Do \u0111\u00f3, \u1ed1ng cong 3 inch SCH20 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 c\u1ea5p n\u01b0\u1edbc, tho\u00e1t n\u01b0\u1edbc v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c n\u01a1i \u00e1p su\u1ea5t cao kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/p>\n<h3>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn d\u00e2n d\u1ee5ng, th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p<\/h3>\n<p>S\u1ef1 \u0111a n\u0103ng c\u1ee7a \u1ed1ng g\u00f3c 3 inch SCH20 khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong c\u00e1c l\u0129nh v\u1ef1c d\u00e2n d\u1ee5ng, th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p. Trong h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc d\u00e2n d\u1ee5ng, c\u00e1c \u1ed1ng g\u00f3c n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho h\u1ec7 th\u1ed1ng tho\u00e1t n\u01b0\u1edbc v\u00e0 th\u00f4ng gi\u00f3, n\u01a1i \u00e1p su\u1ea5t th\u1ea5p l\u00e0 ti\u00eau chu\u1ea9n. \u0110\u1ed9 tin c\u1eady c\u1ee7a ch\u00fang \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i b\u1ec1n b\u1ec9 v\u00e0 an to\u00e0n cho h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc quan tr\u1ecdng trong nh\u00e0.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c t\u00f2a nh\u00e0 th\u01b0\u01a1ng m\u1ea1i, c\u00e1c ph\u1ee5 ki\u1ec7n n\u00e0y l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y v\u00e0 h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc chung. Kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng v\u1eeba ph\u1ea3i \u0111\u1ed3ng th\u1eddi ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u b\u1ed1 tr\u00ed ki\u1ebfn tr\u00fac kh\u00e1c nhau khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf. Trong l\u0129nh v\u1ef1c c\u00f4ng nghi\u1ec7p, c\u00e1c g\u00f3c n\u1ed1i n\u00e0y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong m\u1ed9t ph\u1ea1m vi r\u1ed9ng h\u01a1n nh\u1edd \u0111\u1ed9 b\u1ec1n cao v\u00e0 \u0111a d\u1ea1ng v\u1ec1 v\u1eadt li\u1ec7u.<\/p>\n<p>B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y ch\u00fang trong nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>D\u1ea7u kh\u00ed:<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng \u00e1p su\u1ea5t th\u1ea5p \u0111\u1ec3 v\u1eadn chuy\u1ec3n c\u00e1c ch\u1ea5t nh\u01b0 kh\u00ed \u0111\u1ed1t t\u1ef1 nhi\u00ean.<\/li>\n<li><strong>Ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m:<\/strong> Phi\u00ean b\u1ea3n th\u00e9p kh\u00f4ng g\u1ec9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn v\u1ec7 sinh trong ng\u00e0nh th\u1ef1c ph\u1ea9m v\u00e0 \u0111\u1ed3 u\u1ed1ng.<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng trong l\u0129nh v\u1ef1c h\u00e0ng h\u1ea3i:<\/strong> Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a ch\u00fang l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a t\u00e0u thuy\u1ec1n ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc m\u1eb7n.<\/li>\n<li><strong>X\u00e2y d\u1ef1ng:<\/strong> \u0110\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o c\u00e1c khung k\u1ebft c\u1ea5u v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn kh\u00e1c nhau.<\/li>\n<\/ul>\n<h3>C\u00e1c v\u1eadt li\u1ec7u th\u00f4ng d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u1ed1ng cong 3 inch SCH20<\/h3>\n<p>Khi l\u1ef1a ch\u1ecdn \u1ed1ng cong 3 inch SCH20, v\u1eadt li\u1ec7u l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t c\u1ea7n xem x\u00e9t. V\u1eadt li\u1ec7u c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh ph\u00f9 h\u1ee3p c\u1ee7a \u1ed1ng cong trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 trong nhi\u1ec1u n\u0103m t\u1edbi.<\/p>\n<p>C\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 th\u00e9p carbon, m\u1ed7i lo\u1ea1i \u0111\u1ec1u c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m ri\u00eang bi\u1ec7t. Th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng v\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng c\u1ee7a h\u00f3a ch\u1ea5t, trong khi th\u00e9p carbon n\u1ed5i ti\u1ebfng v\u1edbi \u0111\u1ed9 b\u1ec1n cao v\u00e0 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t th\u1eadm ch\u00ed c\u00f2n s\u1eed d\u1ee5ng th\u00e9p h\u1ee3p kim \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t \u0111\u1eb7c bi\u1ec7t.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh nhanh c\u00e1c t\u00f9y ch\u1ecdn v\u1eadt li\u1ec7u ch\u00ednh:<\/p>\n<ul>\n<li><strong>Th\u00e9p kh\u00f4ng g\u1ec9:<\/strong> Cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 \u1ea9m cao ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t. \u0110\u00e2y c\u0169ng l\u00e0 l\u1ef1a ch\u1ecdn v\u1ec7 sinh an to\u00e0n cho ng\u00e0nh th\u1ef1c ph\u1ea9m v\u00e0 d\u01b0\u1ee3c ph\u1ea9m.<\/li>\n<li><strong>Th\u00e9p carbon:<\/strong> \u0110\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c t\u1ed1t, v\u1eadt li\u1ec7u n\u00e0y l\u00e0 gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t th\u1ea5p, s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch chung, n\u01a1i \u0103n m\u00f2n kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 ch\u00ednh.<\/li>\n<li><strong>PVC:<\/strong> M\u1eb7c d\u00f9 \u00edt ph\u1ed5 bi\u1ebfn trong c\u00e1c ti\u00eau chu\u1ea9n SCH20 cho \u1ed1ng kim lo\u1ea1i c\u00f4ng nghi\u1ec7p, \u1ed1ng cong PVC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc d\u00e2n d\u1ee5ng \u00e1p su\u1ea5t th\u1ea5p nh\u1edd tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9 v\u00e0 d\u1ec5 l\u1eafp \u0111\u1eb7t.<\/li>\n<\/ul>\n<h2>Hi\u1ec3u v\u1ec1 c\u00e1c ti\u00eau chu\u1ea9n \u1ed1ng: Gi\u1ea3i th\u00edch v\u1ec1 SCH20<\/h2>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c ti\u00eau chu\u1ea9n \u1ed1ng (pipe schedules) l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 l\u1ef1a ch\u1ecdn ph\u1ee5 ki\u1ec7n ph\u00f9 h\u1ee3p, nh\u01b0 c\u00fat 3 inch sch20. L\u1ecbch tr\u00ecnh 20 (th\u01b0\u1eddng \u0111\u01b0\u1ee3c vi\u1ebft t\u1eaft l\u00e0 sch20) quy \u0111\u1ecbnh \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 m\u1ee9c \u00e1p su\u1ea5t c\u1ee7a \u1ed1ng v\u00e0 ph\u1ee5 ki\u1ec7n, \u0111\u1ea3m b\u1ea3o ch\u00fang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c l\u01b0u l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng y\u00eau c\u1ea7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. V\u00ed d\u1ee5, \u0111\u01b0\u1eddng k\u00ednh trong v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u00f3 th\u1ec3 thay \u0111\u1ed5i, nh\u01b0ng \u0111\u1ed9 b\u1ec1n k\u00e9o v\u1eabn gi\u1eef nguy\u00ean. Ti\u00eau chu\u1ea9n n\u00e0y cho ph\u00e9p t\u00edch h\u1ee3p d\u1ec5 d\u00e0ng v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn kh\u00e1c nhau, d\u00f9 l\u00e0 cho c\u1ea5p n\u01b0\u1edbc, kh\u00ed \u0111\u1ed1t t\u1ef1 nhi\u00ean hay \u1ee9ng d\u1ee5ng trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m.<\/p>\n<h3>SCH20 c\u00f3 \u00fd ngh\u0129a g\u00ec \u0111\u1ed1i v\u1edbi \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 m\u1ee9c \u00e1p su\u1ea5t \u0111\u1ecbnh m\u1ee9c?<\/h3>\n<p>M\u00e3 SCH20 li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng c\u1ee7a \u1ed1ng g\u00f3c v\u00e0 do \u0111\u00f3, m\u1ee9c \u00e1p su\u1ea5t cho ph\u00e9p c\u1ee7a n\u00f3. V\u00ec \u1ed1ng SCH20 c\u00f3 th\u00e0nh m\u1ecfng h\u01a1n, ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u00e1p su\u1ea5t th\u1ea5p v\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. M\u1ee9c \u00e1p su\u1ea5t cho ph\u00e9p ch\u00ednh x\u00e1c c\u1ee7a \u1ed1ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea3 l\u1ecbch tr\u00ecnh v\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a \u1ed1ng; m\u1ed9t \u1ed1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n th\u01b0\u1eddng c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t cao h\u01a1n so v\u1edbi m\u1ed9t \u1ed1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n c\u00f9ng l\u1ecbch tr\u00ecnh.<\/p>\n<p>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0y l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u1ee7a b\u1ea1n. Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u1ed9t g\u00f3c n\u1ed1i c\u00f3 m\u1ee9c \u00e1p su\u1ea5t kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng, do \u0111\u00f3 vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u1ee5 ki\u1ec7n ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u v\u1eadn h\u00e0nh l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Trong khi SCH20 ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng vi\u1ec7c c\u00f3 y\u00eau c\u1ea7u th\u1ea5p, c\u00e1c h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t cao \u0111\u00f2i h\u1ecfi ph\u1ee5 ki\u1ec7n c\u00f3 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng l\u1edbn h\u01a1n.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh \u0111\u01a1n gi\u1ea3n v\u1ec1 c\u00e1c l\u1ecbch tr\u00ecnh th\u00f4ng d\u1ee5ng cho \u1ed1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 3 inch:<\/p>\n<div style=\"max-width: 85vw; overflow: auto;\">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>L\u1ecbch tr\u00ecnh \u1ed1ng<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u0110\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng danh ngh\u0129a (inch)<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u0110\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a \u00e1p su\u1ea5t<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>SCH20<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>0.120<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u00c1p su\u1ea5t th\u1ea5p<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>SCH40<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>0.216<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u00c1p su\u1ea5t trung b\u00ecnh<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>SCH80<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>0.300<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u00c1p su\u1ea5t cao<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>Ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng cho \u1ed1ng cong SCH20 (ASME B16.9, ASTM A403)<\/h3>\n<p>Ti\u00eau chu\u1ea9n ASME B16.9 v\u00e0 ASTM A403 l\u00e0 nh\u1eefng h\u01b0\u1edbng d\u1eabn quan tr\u1ecdng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c g\u00f3c cong sch20 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau. C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh thi\u1ebft k\u1ebf, k\u00edch th\u01b0\u1edbc v\u00e0 dung sai cho c\u00e1c ph\u1ee5 ki\u1ec7n \u1ed1ng th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 th\u00e9p carbon, bao g\u1ed3m c\u1ea3 g\u00f3c cong b\u00e1n k\u00ednh d\u00e0i v\u00e0 ng\u1eafn. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u00e1p su\u1ea5t t\u1ed1i \u01b0u v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, g\u00f3p ph\u1ea7n v\u00e0o l\u01b0u l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng hi\u1ec7u qu\u1ea3 trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn, d\u00f9 l\u00e0 cho kh\u00ed \u0111\u1ed1t t\u1ef1 nhi\u00ean, c\u1ea5p n\u01b0\u1edbc hay ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m.<\/p>\n<h2>B\u00e1n k\u00ednh d\u00e0i so v\u1edbi b\u00e1n k\u00ednh ng\u1eafn: S\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u1ecdn kh\u1edbp khu\u1ef7u ph\u00f9 h\u1ee3p<\/h2>\n<p>Khi l\u1ef1a ch\u1ecdn \u1ed1ng g\u00f3c 3 inch SCH20, m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u ti\u00ean b\u1ea1n c\u1ea7n \u0111\u01b0a ra l\u00e0 s\u1eed d\u1ee5ng phi\u00ean b\u1ea3n b\u00e1n k\u00ednh d\u00e0i (LR) hay b\u00e1n k\u00ednh ng\u1eafn (SR). C\u1ea3 hai lo\u1ea1i ph\u1ee5 ki\u1ec7n \u1ed1ng n\u00e0y \u0111\u1ec1u gi\u00fap thay \u0111\u1ed5i h\u01b0\u1edbng d\u00f2ng ch\u1ea3y, nh\u01b0ng ch\u00fang l\u00e0m \u0111i\u1ec1u \u0111\u00f3 v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng cong ho\u1eb7c b\u00e1n k\u00ednh kh\u00e1c nhau. S\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecf n\u00e0y c\u00f3 t\u00e1c \u0111\u1ed9ng l\u1edbn \u0111\u1ebfn l\u01b0u l\u01b0\u1ee3ng v\u00e0 b\u1ed1 tr\u00ed h\u1ec7 th\u1ed1ng.<\/p>\n<p>L\u1ef1a ch\u1ecdn gi\u1eefa c\u00fat g\u00f3c b\u00e1n k\u00ednh d\u00e0i v\u00e0 c\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n, bao g\u1ed3m kh\u00f4ng gian c\u00f3 s\u1eb5n v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c duy tr\u00ec \u00e1p su\u1ea5t d\u00f2ng ch\u1ea3y. Hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang bi\u1ec7t c\u1ee7a ch\u00fang s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u00fang \u0111\u1eafn cho d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang.<\/p>\n<h3>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1eb7c t\u00ednh d\u00f2ng ch\u1ea3y<\/h3>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n gi\u1eefa c\u00fat g\u00f3c b\u00e1n k\u00ednh d\u00e0i v\u00e0 c\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn n\u1eb1m \u1edf k\u00edch th\u01b0\u1edbc c\u1ee7a ch\u00fang. C\u00fat g\u00f3c b\u00e1n k\u00ednh d\u00e0i c\u00f3 kho\u1ea3ng c\u00e1ch t\u1eeb t\u00e2m \u0111\u1ebfn \u0111\u1ea7u b\u1eb1ng 1,5 l\u1ea7n k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a (NPS). Ng\u01b0\u1ee3c l\u1ea1i, kho\u1ea3ng c\u00e1ch t\u1eeb t\u00e2m \u0111\u1ebfn \u0111\u1ea7u c\u1ee7a c\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn b\u1eb1ng v\u1edbi NPS. \u0110\u1ed1i v\u1edbi \u1ed1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 3 inch, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00fat g\u00f3c b\u00e1n k\u00ednh d\u00e0i c\u00f3 b\u00e1n k\u00ednh 4,5 inch, trong khi c\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn c\u00f3 b\u00e1n k\u00ednh 3 inch.<\/p>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 b\u00e1n k\u00ednh n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9ng l\u1ef1c h\u1ecdc ch\u1ea5t l\u1ecfng b\u00ean trong \u1ed1ng. M\u1ed9t g\u00f3c cong c\u00f3 b\u00e1n k\u00ednh d\u00e0i t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng cong nh\u1eb9 nh\u00e0ng v\u00e0 t\u1eeb t\u1eeb h\u01a1n. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn \u00edt kh\u00e1ng l\u1ef1c d\u00f2ng ch\u1ea3y h\u01a1n, gi\u1ea3m \u00e1p su\u1ea5t t\u1ed1i thi\u1ec3u v\u00e0 d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng hi\u1ec7u qu\u1ea3 h\u01a1n. M\u1ed9t g\u00f3c cong c\u00f3 b\u00e1n k\u00ednh ng\u1eafn t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng cong s\u1eafc n\u00e9t h\u01a1n, l\u00e0m t\u0103ng \u0111\u1ed9 nhi\u1ec5u lo\u1ea1n v\u00e0 gi\u1ea3m \u00e1p su\u1ea5t.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch so s\u00e1nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ch\u00fang:<\/p>\n<ul>\n<li><strong>C\u1ed5 tay c\u00f3 b\u00e1n k\u00ednh d\u00e0i (LR):<\/strong> Cung c\u1ea5p d\u00f2ng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t ma s\u00e1t, l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c h\u1ec7 th\u1ed1ng n\u01a1i vi\u1ec7c duy tr\u00ec \u00e1p su\u1ea5t l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/li>\n<li><strong>C\u00fat g\u00f3c b\u00e1n k\u00ednh ng\u1eafn (SR):<\/strong> T\u1ea1o ra m\u1ed9t kh\u00fac cua g\u1ecdn g\u00e0ng, l\u00fd t\u01b0\u1edfng cho nh\u1eefng kh\u00f4ng gian h\u1eb9p n\u01a1i kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n kh\u00fac cua t\u1eeb t\u1eeb.<\/li>\n<li><strong>Hi\u1ec7u su\u1ea5t d\u00f2ng ch\u1ea3y:<\/strong> C\u00e1c g\u00f3c cong LR c\u00f3 \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o l\u01b0u l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng hi\u1ec7u qu\u1ea3, trong khi c\u00e1c g\u00f3c cong SR c\u00f3 th\u1ec3 g\u00e2y ra s\u1ee9c c\u1ea3n l\u01b0u l\u01b0\u1ee3ng cao h\u01a1n, khi\u1ebfn ch\u00fang kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y cao.<\/li>\n<\/ul>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t khi l\u1ef1a ch\u1ecdn h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn<\/h3>\n<p>L\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i \u1ed1ng cong cho h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u1ee7a b\u1ea1n \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00e2n nh\u1eafc nhi\u1ec1u y\u1ebfu t\u1ed1 quan tr\u1ecdng. B\u1ea1n c\u1ea7n xem x\u00e9t c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 kh\u00f4ng gian l\u1eafp \u0111\u1eb7t c\u0169ng nh\u01b0 c\u00e1c y\u00eau c\u1ea7u v\u1eadn h\u00e0nh c\u1ee7a h\u1ec7 th\u1ed1ng. Tr\u1ea3 l\u1eddi m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn \u0111\u01b0\u1ee3c lo\u1ea1i \u1ed1ng cong ph\u00f9 h\u1ee3p.<\/p>\n<p>B\u1ea1n \u0111ang l\u00e0m vi\u1ec7c trong m\u1ed9t kh\u00f4ng gian ch\u1eadt h\u1eb9p? Vi\u1ec7c duy tr\u00ec \u00e1p su\u1ea5t d\u00f2ng ch\u1ea3y c\u00f3 ph\u1ea3i l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u c\u1ee7a b\u1ea1n? Lo\u1ea1i ch\u1ea5t l\u1ecfng n\u00e0o s\u1ebd \u0111i qua \u1ed1ng? C\u00e2u tr\u1ea3 l\u1eddi s\u1ebd gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn gi\u1eefa \u1ed1ng cong b\u00e1n k\u00ednh d\u00e0i ho\u1eb7c ng\u1eafn. C\u1ea3 hai \u0111\u1ec1u c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 t\u00ednh linh ho\u1ea1t tuy\u1ec7t v\u1eddi, nh\u01b0ng hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang s\u1ebd thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<p>H\u00e3y xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 sau \u0111\u00e2y khi \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh l\u1ef1a ch\u1ecdn:<\/p>\n<ul>\n<li><strong>Di\u1ec7n t\u00edch tr\u1ed1ng:<\/strong> N\u1ebfu kh\u00f4ng gian h\u1ea1n ch\u1ebf, \u1ed1ng cong g\u00f3c ng\u1eafn l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t kh\u00fac cua g\u1eaft.<\/li>\n<li><strong>L\u01b0u l\u01b0\u1ee3ng v\u00e0 \u00c1p su\u1ea5t:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng y\u00eau c\u1ea7u d\u00f2ng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 v\u00e0 gi\u1ea3m \u00e1p su\u1ea5t t\u1ed1i thi\u1ec3u, ch\u1eb3ng h\u1ea1n nh\u01b0 trong c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng c\u1ea5p n\u01b0\u1edbc, \u1ed1ng cong b\u00e1n k\u00ednh d\u00e0i l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n.<\/li>\n<li><strong>Lo\u1ea1i ch\u1ea5t l\u1ecfng:<\/strong> Ch\u1ea5t l\u1ecfng m\u00e0i m\u00f2n ho\u1eb7c c\u00f3 t\u1ed1c \u0111\u1ed9 cao s\u1ebd \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb g\u00f3c u\u1ed1n nh\u1eb9 nh\u00e0ng c\u1ee7a \u1ed1ng cong LR \u0111\u1ec3 gi\u1ea3m m\u00e0i m\u00f2n v\u00e0 nhi\u1ec5u lo\u1ea1n.<\/li>\n<li><strong>Chi ph\u00ed:<\/strong> C\u00e1c g\u00f3c cong b\u00e1n k\u00ednh ng\u1eafn th\u01b0\u1eddng c\u00f3 gi\u00e1 th\u00e0nh th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat v\u00e0 s\u1eed d\u1ee5ng \u00edt v\u1eadt li\u1ec7u h\u01a1n, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn.<\/li>\n<\/ul>\n<h2>H\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t \u1ed1ng cong 3 inch SCH20<\/h2>\n<p>L\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn an to\u00e0n v\u00e0 kh\u00f4ng r\u00f2 r\u1ec9. Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u l\u1eafp \u0111\u1eb7t \u1ed1ng cong 3 inch SCH20, vi\u1ec7c \u0111o \u0111\u1ea1c ch\u00ednh x\u00e1c v\u00e0 chu\u1ea9n b\u1ecb \u0111\u1ea7u \u1ed1ng \u0111\u00fang c\u00e1ch l\u00e0 r\u1ea5t quan tr\u1ecdng. Vi\u1ec7c l\u1eafp \u0111\u1eb7t th\u00e0nh c\u00f4ng \u0111\u1ea3m b\u1ea3o \u1ed1ng n\u1ed1i ho\u1ea1t \u0111\u1ed9ng nh\u01b0 mong \u0111\u1ee3i v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/p>\n<p>Quy tr\u00ecnh bao g\u1ed3m c\u00e1c b\u01b0\u1edbc \u0111o \u0111\u1ea1c c\u1ea9n th\u1eadn, l\u00e0m s\u1ea1ch, c\u0103n ch\u1ec9nh v\u00e0 h\u00e0n. Tu\u00e2n th\u1ee7 quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc s\u1ebd gi\u00fap b\u1ea1n \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u c\u00e1c k\u1ef9 thu\u1eadt c\u01a1 b\u1ea3n \u0111\u1ec3 \u0111o \u0111\u1ea1c v\u00e0 l\u1eafp \u0111\u1eb7t c\u00e1c g\u00f3c cong n\u00e0y m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n<h3>C\u00e1c k\u1ef9 thu\u1eadt \u0111o \u0111\u1ea1c ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t<\/h3>\n<p>Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t m\u1ed9t kh\u1edbp n\u1ed1i m\u1edbi ho\u1eb7c thay th\u1ebf kh\u1edbp n\u1ed1i c\u0169, vi\u1ec7c \u0111o \u0111\u1ea1c ch\u00ednh x\u00e1c l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c. C\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng kh\u1edbp nhau c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn r\u00f2 r\u1ec9 ho\u1eb7c h\u1ecfng h\u00f3c h\u1ec7 th\u1ed1ng, v\u00ec v\u1eady vi\u1ec7c d\u00e0nh th\u1eddi gian \u0111\u1ec3 ki\u1ec3m tra k\u00edch th\u01b0\u1edbc l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ea7u ti\u00ean. B\u1ea1n c\u1ea7n \u0111\u1ea3m b\u1ea3o kh\u1edbp n\u1ed1i kh\u1edbp ho\u00e0n h\u1ea3o v\u1edbi \u1ed1ng m\u00e0 n\u00f3 s\u1ebd k\u1ebft n\u1ed1i.<\/p>\n<p>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh c\u1ea7n ki\u1ec3m tra bao g\u1ed3m k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a (NPS), \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng (schedule). \u0110\u1ed1i v\u1edbi m\u1ed9t g\u00f3c \u1ed1ng 3 inch SCH20, k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a (NPS) l\u00e0 3 inch v\u00e0 schedule l\u00e0 20. X\u00e1c nh\u1eadn c\u00e1c chi ti\u1ebft n\u00e0y \u0111\u1ea3m b\u1ea3o s\u1ef1 kh\u1edbp n\u1ed1i ho\u00e0n h\u1ea3o v\u00e0 m\u1ed1i n\u1ed1i an to\u00e0n, kh\u00f4ng r\u00f2 r\u1ec9.<\/p>\n<p>Th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n sau \u0111\u1ec3 \u0111o l\u01b0\u1eddng:<\/p>\n<ul>\n<li><strong>X\u00e1c nh\u1eadn k\u00edch th\u01b0\u1edbc \u1ed1ng:<\/strong> Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc danh ngh\u0129a v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a \u1ed1ng m\u00e0 b\u1ea1n \u0111ang k\u1ebft n\u1ed1i. \u0110\u1ed1i v\u1edbi \u1ed1ng c\u00f3 k\u00edch th\u01b0\u1edbc 3 inch, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i l\u00e0 3,5 inch.<\/li>\n<li><strong>Ki\u1ec3m tra \u0111\u1ed9 d\u00e0y t\u01b0\u1eddng (THK):<\/strong> \u0110\u1ea3m b\u1ea3o l\u1ecbch tr\u00ecnh c\u1ee7a \u1ed1ng khu\u1ef7u kh\u1edbp v\u1edbi l\u1ecbch tr\u00ecnh c\u1ee7a \u1ed1ng. S\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1eb9p \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 x\u00e1c nh\u1eadn n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n SCH20 (kho\u1ea3ng 0,120 inch).<\/li>\n<li><strong>\u0110o chi\u1ec1u d\u00e0i t\u1eeb t\u00e2m \u0111\u1ebfn \u0111\u1ea7u:<\/strong> \u0110\u1ec3 thay th\u1ebf, h\u00e3y \u0111o chi\u1ec1u d\u00e0i t\u1eeb t\u00e2m \u0111\u1ebfn \u0111\u1ea7u c\u1ee7a \u1ed1ng cong hi\u1ec7n c\u00f3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem \u0111\u00f3 l\u00e0 lo\u1ea1i b\u00e1n k\u00ednh d\u00e0i hay ng\u1eafn.<\/li>\n<\/ul>\n<h3>Quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 l\u1eafp \u0111\u1eb7t an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3<\/h3>\n<p>Sau khi c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn, b\u1ea1n c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh l\u1eafp \u0111\u1eb7t. M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t c\u1ea9n th\u1eadn v\u00e0 c\u00f3 h\u1ec7 th\u1ed1ng \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn, b\u1ec1n b\u1ec9 v\u00e0 an to\u00e0n. Ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t \u1ed1ng cong th\u00e9p nh\u01b0 th\u1ebf n\u00e0y ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 h\u00e0n \u0111\u1ed1i \u0111\u1ea7u, t\u1ea1o ra m\u1ed9t m\u1ed1i n\u1ed1i v\u0129nh vi\u1ec5n v\u00e0 ch\u1eafc ch\u1eafn.<\/p>\n<p>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t. B\u1ea5t k\u1ef3 b\u1ee5i b\u1ea9n, r\u1ec9 s\u00e9t ho\u1eb7c d\u1ea7u m\u1ee1 n\u00e0o tr\u00ean \u0111\u1ea7u \u1ed1ng ho\u1eb7c kh\u1edbp n\u1ed1i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n. B\u1ec1 m\u1eb7t s\u1ea1ch s\u1ebd v\u00e0 c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c l\u1eafp \u0111\u1eb7t th\u00e0nh c\u00f4ng. Lu\u00f4n \u0111eo trang b\u1ecb b\u1ea3o h\u1ed9 ph\u00f9 h\u1ee3p, bao g\u1ed3m g\u0103ng tay v\u00e0 k\u00ednh b\u1ea3o h\u1ed9, trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 l\u1eafp \u0111\u1eb7t an to\u00e0n:<\/p>\n<ul>\n<li><strong>Chu\u1ea9n b\u1ecb c\u00e1c \u0111\u1ea7u:<\/strong> V\u1ec7 sinh c\u00e1c \u0111\u1ea7u \u1ed1ng v\u00e0 kh\u1edbp n\u1ed1i, \u0111\u1ea3m b\u1ea3o ch\u00fang kh\u00f4ng c\u00f3 c\u1eb7n b\u1ea9n v\u00e0 \u0111\u01b0\u1ee3c m\u00e0i v\u00e1t \u0111\u00fang c\u00e1ch \u0111\u1ec3 h\u00e0n.<\/li>\n<li><strong>C\u0103n ch\u1ec9nh c\u00e1c th\u00e0nh ph\u1ea7n:<\/strong> \u0110\u1eb7t ph\u1ee5 ki\u1ec7n \u1ed1ng v\u00e0o \u0111\u1ea7u \u1ed1ng, \u0111\u1ea3m b\u1ea3o n\u00f3 \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c v\u00e0 t\u1ea1o ra s\u1ef1 thay \u0111\u1ed5i h\u01b0\u1edbng mong mu\u1ed1n.<\/li>\n<li><strong>H\u00e0n t\u1ea1m:<\/strong> \u00c1p d\u1ee5ng c\u00e1c m\u1ed1i h\u00e0n t\u1ea1m nh\u1ecf xung quanh m\u1ed1i n\u1ed1i \u0111\u1ec3 gi\u1eef \u1ed1ng cong c\u1ed1 \u0111\u1ecbnh t\u1ea1i v\u1ecb tr\u00ed tr\u01b0\u1edbc khi ho\u00e0n th\u00e0nh m\u1ed1i h\u00e0n ch\u00ednh.<\/li>\n<li><strong>Ho\u00e0n th\u00e0nh m\u1ed1i h\u00e0n:<\/strong> Th\u1ef1c hi\u1ec7n m\u1ed1i h\u00e0n cu\u1ed1i c\u00f9ng quanh to\u00e0n b\u1ed9 chu vi c\u1ee7a m\u1ed1i n\u1ed1i, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 th\u00e2m nh\u1eadp \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u1ed1i n\u1ed1i ch\u1eafc ch\u1eafn, kh\u00f4ng r\u00f2 r\u1ec9.<\/li>\n<\/ul>\n<h2>C\u00e1c t\u00f9y ch\u1ecdn v\u1eadt li\u1ec7u cho \u1ed1ng cong 3 inch SCH20<\/h2>\n<p>Ch\u1ea5t li\u1ec7u c\u1ee7a \u1ed1ng cong 3 inch SCH20 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a n\u00f3. C\u00e1c ch\u1ea5t li\u1ec7u kh\u00e1c nhau mang l\u1ea1i nh\u1eefng l\u1ee3i \u00edch kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u1ed9 b\u1ec1n cao h\u01a1n, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n ho\u1eb7c gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd. Hai l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn nh\u1ea5t cho c\u00e1c ph\u1ee5 ki\u1ec7n n\u00e0y l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 th\u00e9p carbon.<\/p>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p ho\u00e0n to\u00e0n ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m ho\u1eb7c h\u00f3a ch\u1ea5t, th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng d\u1ee5ng n\u01a1i \u0111\u1ed9 b\u1ec1n l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng, th\u00e9p carbon cung c\u1ea5p gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed. H\u00e3y so s\u00e1nh chi ti\u1ebft h\u01a1n v\u1ec1 c\u00e1c v\u1eadt li\u1ec7u n\u00e0y.<\/p>\n<h3>Th\u00e9p kh\u00f4ng g\u1ec9 so v\u1edbi th\u00e9p carbon: Hi\u1ec7u su\u1ea5t v\u00e0 t\u00ednh ph\u00f9 h\u1ee3p<\/h3>\n<p>Cu\u1ed9c tranh lu\u1eadn gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 th\u00e9p carbon xoay quanh s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i gi\u1eefa kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 chi ph\u00ed. C\u1ea3 hai v\u1eadt li\u1ec7u \u0111\u1ec1u cung c\u1ea5p \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t xu\u1ea5t s\u1eafc cho c\u00e1c \u1ee9ng d\u1ee5ng SCH20, nh\u01b0ng ch\u00fang ph\u00e1t huy \u01b0u \u0111i\u1ec3m trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau.<\/p>\n<p>Th\u00e9p kh\u00f4ng g\u1ec9, \u0111\u1eb7c bi\u1ec7t l\u00e0 lo\u1ea1i 304, n\u1ed5i ti\u1ebfng v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c ph\u1ea9m v\u00e0 \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i, n\u01a1i v\u1ec7 sinh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i c\u00e1c y\u1ebfu t\u1ed1 kh\u1eafc nghi\u1ec7t l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng h\u00e0ng \u0111\u1ea7u. M\u1eb7c d\u00f9 c\u00f3 gi\u00e1 th\u00e0nh cao h\u01a1n, hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i c\u1ee7a n\u00f3 trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n th\u01b0\u1eddng x\u1ee9ng \u0111\u00e1ng v\u1edbi chi ph\u00ed. Th\u00e9p carbon \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng v\u00ec \u0111\u1ed9 b\u1ec1n cao v\u00e0 gi\u00e1 th\u00e0nh th\u1ea5p, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho x\u00e2y d\u1ef1ng chung v\u00e0 h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u00f4ng nghi\u1ec7p, n\u01a1i \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng kh\u00f4ng qu\u00e1 kh\u1eafc nghi\u1ec7t.<\/p>\n<p>C\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n:<\/strong> Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 \u0103n m\u00f2n h\u00f3a h\u1ecdc r\u1ea5t cao. Th\u00e9p carbon s\u1ebd b\u1ecb g\u1ec9 n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng l\u1edbp ph\u1ee7.<\/li>\n<li><strong>Chi ph\u00ed:<\/strong> Th\u00e9p carbon th\u01b0\u1eddng c\u00f3 gi\u00e1 th\u00e0nh r\u1ebb h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn.<\/li>\n<li><strong>\u0110\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a \u00e1p su\u1ea5t:<\/strong> C\u1ea3 hai v\u1eadt li\u1ec7u \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi m\u1ee9c \u00e1p su\u1ea5t th\u1ea5p c\u1ee7a SCH20. \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t cao, c\u1ea7n s\u1eed d\u1ee5ng l\u1ecbch tr\u00ecnh cao h\u01a1n (v\u00ed d\u1ee5: SCH40, SCH80) b\u1ea5t k\u1ec3 v\u1eadt li\u1ec7u l\u00e0 g\u00ec.<\/li>\n<\/ul>\n<h3>\u1ee8ng d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn n\u01b0\u1edbc v\u00e0 kh\u00ed \u0111\u1ed1t<\/h3>\n<p>\u0110\u00fang v\u1eady, \u1ed1ng cong 3 inch SCH20 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u1ea3 h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn n\u01b0\u1edbc v\u00e0 kh\u00ed \u0111\u1ed1t, mi\u1ec5n l\u00e0 h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1edf \u00e1p su\u1ea5t th\u1ea5p. Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u1edf \u0111\u00e2y r\u1ea5t quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng h\u1ec7 th\u1ed1ng v\u1eadn chuy\u1ec3n n\u01b0\u1edbc u\u1ed1ng, th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng nh\u1edd kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n xu\u1ea5t s\u1eafc v\u00e0 t\u00ednh v\u1ec7 sinh cao.<\/p>\n<p>Trong h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i kh\u00ed \u0111\u1ed1t t\u1ef1 nhi\u00ean, c\u1ea3 \u1ed1ng cong th\u00e9p carbon v\u00e0 \u1ed1ng cong th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Th\u00e9p carbon l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn v\u00e0 kinh t\u1ebf cho c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng kh\u00ed \u00e1p su\u1ea5t th\u1ea5p. K\u1ebft n\u1ed1i h\u00e0n c\u1ee7a c\u00e1c ph\u1ee5 ki\u1ec7n n\u00e0y t\u1ea1o ra m\u1ed9t m\u1ed1i n\u1ed1i an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady, ng\u0103n ng\u1eeba r\u00f2 r\u1ec9, \u0111i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi v\u1eadn chuy\u1ec3n c\u00e1c ch\u1ea5t d\u1ec5 ch\u00e1y.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c l\u0129nh v\u1ef1c n\u00e0y:<\/p>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng n\u01b0\u1edbc:<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc, tho\u00e1t n\u01b0\u1edbc, c\u1ed1ng r\u00e3nh v\u00e0 h\u1ec7 th\u1ed1ng ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y cho c\u1ea3 m\u1ee5c \u0111\u00edch d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i. Th\u00e9p kh\u00f4ng g\u1ec9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 ng\u0103n ng\u1eeba g\u1ec9 s\u00e9t.<\/li>\n<li><strong>\u0110\u01b0\u1eddng \u1ed1ng d\u1eabn kh\u00ed:<\/strong> Ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i kh\u00ed \u0111\u1ed1t t\u1ef1 nhi\u00ean \u00e1p su\u1ea5t th\u1ea5p, n\u01a1i c\u00e1c k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady c\u1ee7a ch\u00fang \u0111\u1ea3m b\u1ea3o an to\u00e0n.<\/li>\n<li><strong>L\u00e0m m\u00e1t c\u00f4ng nghi\u1ec7p:<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ch d\u1eabn n\u01b0\u1edbc l\u00e0m m\u00e1t \u00e1p su\u1ea5t th\u1ea5p trong c\u00e1c c\u01a1 s\u1edf c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n<h2>So s\u00e1nh c\u00e1c lo\u1ea1i c\u00fat g\u00f3c: 90 \u0111\u1ed9 so v\u1edbi 45 \u0111\u1ed9 SCH20<\/h2>\n<p>Ngo\u00e0i b\u00e1n k\u00ednh, g\u00f3c c\u1ee7a c\u00fat \u1ed1ng c\u0169ng l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng kh\u00e1c. C\u00e1c g\u00f3c ph\u1ed5 bi\u1ebfn nh\u1ea5t m\u00e0 b\u1ea1n s\u1ebd g\u1eb7p l\u00e0 c\u00fat \u1ed1ng 90 \u0111\u1ed9 v\u00e0 45 \u0111\u1ed9. Nh\u01b0 t\u00ean g\u1ecdi cho th\u1ea5y, c\u00fat \u1ed1ng 90 \u0111\u1ed9 t\u1ea1o ra m\u1ed9t g\u00f3c quay g\u00f3c vu\u00f4ng s\u1eafc n\u00e9t, trong khi c\u00fat \u1ed1ng 45 \u0111\u1ed9 cung c\u1ea5p m\u1ed9t g\u00f3c quay nh\u1eb9 nh\u00e0ng, b\u00e1n ph\u1ea7n trong h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn.<\/p>\n<p>G\u00f3c m\u00e0 b\u1ea1n ch\u1ecdn c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn b\u1ed1 c\u1ee5c h\u1ec7 th\u1ed1ng v\u00e0 \u0111\u1eb7c t\u00ednh d\u00f2ng ch\u1ea3y. G\u00f3c cong 90 \u0111\u1ed9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 v\u01b0\u1ee3t qua c\u00e1c g\u00f3c cua s\u1eafc nh\u1ecdn, trong khi g\u00f3c cong 45 \u0111\u1ed9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c thay \u0111\u1ed5i h\u01b0\u1edbng nh\u1eb9. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u c\u00e1ch thi\u1ebft k\u1ebf c\u1ee7a ch\u00fang \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng.<\/p>\n<h3>T\u00e1c \u0111\u1ed9ng th\u1ee7y \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u00e0 y\u00eau c\u1ea7u v\u1ec1 kh\u00f4ng gian<\/h3>\n<p>G\u00f3c c\u1ee7a m\u1ed9t g\u00f3c cong tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9ng h\u1ecdc ch\u1ea5t l\u1ecfng khi ch\u1ea5t l\u1ecfng \u0111i qua n\u00f3. M\u1ed9t g\u00f3c cong 90 \u0111\u1ed9 bu\u1ed9c ch\u1ea5t l\u1ecfng ph\u1ea3i thay \u0111\u1ed5i h\u01b0\u1edbng \u0111\u1ed9t ng\u1ed9t, t\u1ea1o ra nhi\u1ec1u nhi\u1ec5u lo\u1ea1n h\u01a1n v\u00e0 gi\u1ea3m \u00e1p su\u1ea5t l\u1edbn h\u01a1n so v\u1edbi m\u1ed9t g\u00f3c cong 45 \u0111\u1ed9 nh\u1eb9 nh\u00e0ng h\u01a1n. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng m\u00e0 l\u01b0u l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng hi\u1ec7u qu\u1ea3 l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u, vi\u1ec7c s\u1eed d\u1ee5ng hai g\u00f3c cong 45 \u0111\u1ed9 \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c cong 90 \u0111\u1ed9 c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t g\u00f3c cong 90 \u0111\u1ed9 duy nh\u1ea5t.<\/p>\n<p>T\u1eeb g\u00f3c \u0111\u1ed9 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng kh\u00f4ng gian, \u1ed1ng g\u00f3c 90 \u0111\u1ed9 l\u00e0 gi\u1ea3i ph\u00e1p g\u1ecdn nh\u1eb9 nh\u1ea5t \u0111\u1ec3 th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng g\u00f3c vu\u00f4ng. N\u00f3 y\u00eau c\u1ea7u \u00edt \u1ed1ng h\u01a1n v\u00e0 chi\u1ebfm \u00edt di\u1ec7n t\u00edch h\u01a1n. \u1ed0ng g\u00f3c 45 \u0111\u1ed9, m\u1eb7c d\u00f9 t\u1ed1t h\u01a1n cho l\u01b0u l\u01b0\u1ee3ng, nh\u01b0ng y\u00eau c\u1ea7u nhi\u1ec1u kh\u00f4ng gian v\u1eadt l\u00fd h\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i h\u01b0\u1edbng \u0111\u00e1ng k\u1ec3.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng t\u00e1c \u0111\u1ed9ng ch\u00ednh:<\/p>\n<ul>\n<li><strong>L\u01b0u l\u01b0\u1ee3ng v\u00e0 \u00c1p su\u1ea5t:<\/strong> C\u00e1c g\u00f3c cong 45 \u0111\u1ed9 t\u1ea1o ra \u00edt nhi\u1ec5u lo\u1ea1n v\u00e0 m\u1ea5t \u00e1p su\u1ea5t h\u01a1n, gi\u00fap d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng hi\u1ec7u qu\u1ea3 h\u01a1n. C\u00e1c g\u00f3c cong 90 \u0111\u1ed9 g\u00e2y ra s\u1ef1 s\u1ee5t \u00e1p \u0111\u00e1ng k\u1ec3 h\u01a1n.<\/li>\n<li><strong>Kh\u00f4ng gian:<\/strong> C\u00fat 90 \u0111\u1ed9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c g\u00f3c h\u1eb9p v\u00e0 b\u1ed1 tr\u00ed kh\u00f4ng gian nh\u1ecf g\u1ecdn. C\u00fat 45 \u0111\u1ed9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c kh\u00fac cua t\u1eeb t\u1eeb, n\u01a1i kh\u00f4ng gian kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng.<\/li>\n<li><strong>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng:<\/strong> S\u1ef1 l\u1ef1a ch\u1ecdn gi\u1eefa ch\u00fang \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 ph\u1ee9c t\u1ea1p t\u1ed5ng th\u1ec3 v\u00e0 b\u1ed1 tr\u00ed c\u1ee7a h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed5ng chi\u1ec1u d\u00e0i \u1ed1ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n<h3>C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t cho t\u1eebng g\u00f3c khu\u1ef7u tay<\/h3>\n<p>\u1ee8ng d\u1ee5ng l\u00fd t\u01b0\u1edfng cho m\u1ed7i g\u00f3c khu\u1ef7u ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn. L\u1ef1a ch\u1ecdn c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn b\u1edfi nhu c\u1ea7u c\u00e2n b\u1eb1ng gi\u1eefa hi\u1ec7u su\u1ea5t l\u01b0u l\u01b0\u1ee3ng v\u00e0 c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 kh\u00f4ng gian. C\u1ea3 hai lo\u1ea1i ph\u1ee5 ki\u1ec7n \u0111\u1ec1u l\u00e0 c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu cho th\u1ee3 l\u1eafp \u1ed1ng.<\/p>\n<p>C\u00fat g\u00f3c 90 \u0111\u1ed9 l\u00e0 ti\u00eau chu\u1ea9n \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c kh\u00fac cua g\u1ea5p quanh g\u00f3c ho\u1eb7c ch\u01b0\u1edbng ng\u1ea1i v\u1eadt. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc, h\u1ec7 th\u1ed1ng HVAC v\u00e0 \u1ed1ng d\u1eabn c\u00f4ng nghi\u1ec7p n\u01a1i c\u1ea7n c\u00f3 kh\u00fac cua g\u00f3c vu\u00f4ng. M\u1eb7t kh\u00e1c, c\u00fat g\u00f3c 45 \u0111\u1ed9 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 t\u1ea1o kho\u1ea3ng c\u00e1ch ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh nh\u1eb9 trong \u0111\u01b0\u1eddng \u1ed1ng, gi\u00fap c\u0103n ch\u1ec9nh c\u00e1c \u1ed1ng kh\u00f4ng ho\u00e0n to\u00e0n song song.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t cho t\u1eebng tr\u01b0\u1eddng h\u1ee3p:<\/p>\n<ul>\n<li><strong>C\u00fat g\u00f3c 90 \u0111\u1ed9:<\/strong> Ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ec3 k\u1ebft n\u1ed1i \u1ed1ng t\u1ea1i c\u00e1c giao \u0111i\u1ec3m vu\u00f4ng g\u00f3c, ch\u1eb3ng h\u1ea1n nh\u01b0 trong h\u1ec7 th\u1ed1ng sprinkler ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y, khung k\u1ebft c\u1ea5u v\u00e0 x\u1eed l\u00fd g\u00f3c t\u01b0\u1eddng.<\/li>\n<li><strong>C\u00fat g\u00f3c 45 \u0111\u1ed9:<\/strong> Ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o ra nh\u1eefng thay \u0111\u1ed5i h\u01b0\u1edbng d\u1ea7n d\u1ea7n trong h\u1ec7 th\u1ed1ng tho\u00e1t n\u01b0\u1edbc, gi\u00fap d\u00f2ng ch\u1ea3y di\u1ec5n ra m\u01b0\u1ee3t m\u00e0, \u0111i\u1ec1u ch\u1ec9nh nh\u1eb9 nh\u00e0ng h\u01b0\u1edbng d\u1eabn v\u00e0 d\u1eabn \u1ed1ng quanh c\u00e1c ch\u01b0\u1edbng ng\u1ea1i v\u1eadt nh\u1ecf.<\/li>\n<li><strong>S\u1eed d\u1ee5ng k\u1ebft h\u1ee3p:<\/strong> Trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p nh\u01b0 trong c\u00e1c nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, c\u1ea3 hai lo\u1ea1i ph\u1ee5 ki\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p \u0111\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<h2>Mua s\u1eafm v\u00e0 cung \u1ee9ng \u1ed1ng cong 3 inch SCH20 tr\u1ef1c tuy\u1ebfn<\/h2>\n<p>Mua \u1ed1ng cong 3 inch SCH20 tr\u1ef1c tuy\u1ebfn c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t c\u00e1ch ti\u1ec7n l\u1ee3i v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c b\u1ed9 ph\u1eadn b\u1ea1n c\u1ea7n. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p cung c\u1ea5p \u0111a d\u1ea1ng c\u00e1c lo\u1ea1i ph\u1ee5 ki\u1ec7n, v\u1eadt li\u1ec7u v\u00e0 k\u00edch th\u01b0\u1edbc. Tuy nhi\u00ean, khi mua h\u00e0ng tr\u1ef1c tuy\u1ebfn, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i l\u00e0 m\u1ed9t ng\u01b0\u1eddi mua h\u00e0ng th\u00f4ng minh v\u00e0 x\u00e1c minh r\u1eb1ng b\u1ea1n \u0111ang mua t\u1eeb m\u1ed9t ngu\u1ed3n \u0111\u00e1ng tin c\u1eady.<\/p>\n<p>Tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh mua h\u00e0ng, b\u1ea1n n\u00ean xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ea3n ph\u1ea9m v\u00e0 ki\u1ec3m tra \u0111\u1ed9 tin c\u1eady c\u1ee7a nh\u00e0 cung c\u1ea5p. Vi\u1ec7c ch\u00fa \u00fd \u0111\u1ebfn c\u00e1c chi ti\u1ebft nh\u01b0 ch\u1ee9ng nh\u1eadn, bao b\u00ec v\u00e0 ch\u00ednh s\u00e1ch v\u1eadn chuy\u1ec3n s\u1ebd gi\u00fap \u0111\u1ea3m b\u1ea3o b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n.<\/p>\n<h3>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng c\u1ea7n xem x\u00e9t tr\u01b0\u1edbc khi mua<\/h3>\n<p>Khi b\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng mua h\u00e0ng, vi\u1ec7c ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng t\u1ea5t c\u1ea3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng l\u00e0 \u0111i\u1ec1u v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u1ea1n ch\u1ecdn \u0111\u00fang linh ki\u1ec7n. M\u1ed9t sai s\u00f3t nh\u1ecf trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c linh ki\u1ec7n kh\u00f4ng t\u01b0\u01a1ng th\u00edch, g\u00e2y tr\u00ec ho\u00e3n d\u1ef1 \u00e1n v\u00e0 ph\u00e1t sinh chi ph\u00ed th\u00eam. Lu\u00f4n ki\u1ec3m tra k\u1ef9 th\u00f4ng tin s\u1ea3n ph\u1ea9m do nh\u00e0 cung c\u1ea5p tr\u1ef1c tuy\u1ebfn cung c\u1ea5p.<\/p>\n<p>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c nh\u1eadn c\u00e1c k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n: k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a (NPS), \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng (schedule). \u0110\u1ea3m b\u1ea3o v\u1eadt li\u1ec7u\u2014cho d\u00f9 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 hay th\u00e9p carbon\u2014ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. Cu\u1ed1i c\u00f9ng, ki\u1ec3m tra xem s\u1ea3n ph\u1ea9m c\u00f3 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh nh\u01b0 ANSI, ASME ho\u1eb7c ISO hay kh\u00f4ng.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch c\u00e1c ti\u00eau ch\u00ed c\u1ea7n ki\u1ec3m tra tr\u01b0\u1edbc khi mua:<\/p>\n<ul>\n<li><strong>K\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a (NPS):<\/strong> Ph\u1ea3i l\u00e0 3 inch.<\/li>\n<li><strong>L\u1ecbch tr\u00ecnh (\u0110\u1ed9 d\u00e0y th\u00e0nh):<\/strong> Ph\u1ea3i l\u00e0 SCH20.<\/li>\n<li><strong>Ch\u1ea5t li\u1ec7u:<\/strong> X\u00e1c nh\u1eadn xem \u0111\u00f3 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 (v\u00ed d\u1ee5: 304, 316) hay th\u00e9p carbon.<\/li>\n<li><strong>Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n:<\/strong> Ki\u1ec3m tra c\u00e1c ch\u1ee9ng nh\u1eadn nh\u01b0 ASME B16.9 ho\u1eb7c ASTM A403 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/li>\n<li><strong>Lo\u1ea1i v\u00e0 G\u00f3c:<\/strong> Ch\u1ec9 \u0111\u1ecbnh xem b\u1ea1n c\u1ea7n g\u00f3c cong c\u00f3 b\u00e1n k\u00ednh d\u00e0i hay ng\u1eafn v\u00e0 g\u00f3c \u0111\u1ed9 ch\u00ednh x\u00e1c (90 \u0111\u1ed9 ho\u1eb7c 45 \u0111\u1ed9).<\/li>\n<\/ul>\n<h3>M\u1eb9o ch\u1ecdn nh\u00e0 cung c\u1ea5p uy t\u00edn<\/h3>\n<p>T\u00ecm ki\u1ebfm nh\u00e0 cung c\u1ea5p uy t\u00edn quan tr\u1ecdng kh\u00f4ng k\u00e9m vi\u1ec7c l\u1ef1a ch\u1ecdn kh\u1edbp g\u1ed1i ph\u00f9 h\u1ee3p. M\u1ed9t nh\u00e0 cung c\u1ea5p \u0111\u00e1ng tin c\u1eady s\u1ebd cung c\u1ea5p s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng cao, \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn v\u00e0 cam k\u1ebft b\u1ea3o h\u00e0nh. Khi \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e0 cung c\u1ea5p tr\u1ef1c tuy\u1ebfn, h\u00e3y t\u00ecm ki\u1ebfm c\u00e1c d\u1ea5u hi\u1ec7u c\u1ee7a s\u1ef1 chuy\u00ean nghi\u1ec7p v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n<p>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra m\u00f4 t\u1ea3 s\u1ea3n ph\u1ea9m r\u00f5 r\u00e0ng v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt chi ti\u1ebft. M\u1ed9t nh\u00e0 b\u00e1n h\u00e0ng uy t\u00edn s\u1ebd cung c\u1ea5p t\u1ea5t c\u1ea3 th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh mua h\u00e0ng m\u1ed9t c\u00e1ch th\u00f4ng minh. H\u00e3y t\u00ecm ki\u1ebfm \u0111\u00e1nh gi\u00e1 c\u1ee7a kh\u00e1ch h\u00e0ng, th\u00f4ng tin li\u00ean h\u1ec7 r\u00f5 r\u00e0ng v\u00e0 ch\u00ednh s\u00e1ch v\u1eadn chuy\u1ec3n v\u00e0 \u0111\u1ed5i tr\u1ea3 minh b\u1ea1ch. Quan tr\u1ecdng nh\u1ea5t, h\u00e3y x\u00e1c minh r\u1eb1ng s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd \u0111i k\u00e8m v\u1edbi c\u00e1c ch\u1ee9ng nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 g\u1ee3i \u00fd \u0111\u1ec3 ch\u1ecdn nh\u00e0 cung c\u1ea5p uy t\u00edn:<\/p>\n<ul>\n<li><strong>Ki\u1ec3m tra ch\u1ee9ng nh\u1eadn:<\/strong> \u0110\u1ea3m b\u1ea3o nh\u00e0 cung c\u1ea5p cung c\u1ea5p c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n ng\u00e0nh (ASTM, ASME, ANSI). Y\u00eau c\u1ea7u t\u00e0i li\u1ec7u n\u1ebfu kh\u00f4ng c\u00f3 s\u1eb5n.<\/li>\n<li><strong>\u0110\u1ecdc \u0111\u00e1nh gi\u00e1 c\u1ee7a kh\u00e1ch h\u00e0ng:<\/strong> T\u00ecm ki\u1ebfm ph\u1ea3n h\u1ed3i t\u1eeb c\u00e1c kh\u00e1ch h\u00e0ng kh\u00e1c v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m, bao b\u00ec v\u00e0 th\u1eddi gian giao h\u00e0ng.<\/li>\n<li><strong>\u0110\u00e1nh gi\u00e1 giao ti\u1ebfp:<\/strong> M\u1ed9t nh\u00e0 cung c\u1ea5p uy t\u00edn s\u1ebd ph\u1ea3n h\u1ed3i nhanh ch\u00f3ng c\u00e1c c\u00e2u h\u1ecfi v\u00e0 cung c\u1ea5p nh\u1eefng c\u00e2u tr\u1ea3 l\u1eddi r\u00f5 r\u00e0ng, h\u1eefu \u00edch.<\/li>\n<li><strong>Ch\u00ednh s\u00e1ch \u0111\u00e1nh gi\u00e1:<\/strong> H\u00e3y t\u00ecm hi\u1ec3u k\u1ef9 ch\u00ednh s\u00e1ch v\u1eadn chuy\u1ec3n, \u0111\u00f3ng g\u00f3i v\u00e0 \u0111\u1ed5i tr\u1ea3 c\u1ee7a h\u1ecd tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng \u0111\u1ec3 tr\u00e1nh nh\u1eefng b\u1ea5t ng\u1edd kh\u00f4ng mong mu\u1ed1n.<\/li>\n<\/ul>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c g\u00f3c cong 3 inch SCH20 c\u00f3 b\u00e1n k\u00ednh d\u00e0i v\u00e0 b\u00e1n k\u00ednh ng\u1eafn l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u cho h\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u1ee7a b\u1ea1n. M\u1ed7i lo\u1ea1i g\u00f3c cong ph\u1ee5c v\u1ee5 cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, v\u00e0 vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn \u0111\u1eb7c t\u00ednh d\u00f2ng ch\u1ea3y v\u00e0 hi\u1ec7u qu\u1ea3 l\u1eafp \u0111\u1eb7t. B\u1eb1ng c\u00e1ch xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt k\u00edch th\u01b0\u1edbc, l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c d\u1ef1 \u00e1n \u1ed1ng n\u01b0\u1edbc c\u1ee7a m\u00ecnh. Khi l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u, h\u00e3y nh\u1edb ki\u1ec3m tra c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng v\u00e0 ch\u1ecdn nh\u00e0 cung c\u1ea5p uy t\u00edn \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t. N\u1ebfu b\u1ea1n c\u00f3 b\u1ea5t k\u1ef3 c\u00e2u h\u1ecfi n\u00e0o ho\u1eb7c c\u1ea7n h\u1ed7 tr\u1ee3 trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t, h\u00e3y li\u00ean h\u1ec7 \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n!<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>C\u00e1c g\u00f3c cong th\u00e9p kh\u00f4ng g\u1ec9 3 inch SCH20 c\u00f3 ph\u00f9 h\u1ee3p cho \u00e1p su\u1ea5t cao kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, m\u1ed9t c\u00fat 3 inch SCH20, d\u00f9 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t th\u1ea5p. M\u00e3 SCH20 cho bi\u1ebft \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng m\u1ecfng. M\u1eb7c d\u00f9 th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n xu\u1ea5t s\u1eafc, nh\u01b0ng \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u00e1p su\u1ea5t cao, b\u1ea1n c\u1ea7n s\u1eed d\u1ee5ng ph\u1ee5 ki\u1ec7n \u1ed1ng th\u00e9p c\u00f3 m\u00e3 s\u1ed1 l\u1ecbch tr\u00ecnh cao h\u01a1n, nh\u01b0 SCH40 ho\u1eb7c SCH80.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u1ed1ng g\u00f3c 3 inch SCH20 cho c\u1ea3 h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc v\u00e0 \u1ed1ng gas kh\u00f4ng?<\/h3>\n<p>\u0110\u00fang, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u1ed1ng cong 3 inch SCH20 cho c\u1ea3 h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng kh\u00ed \u00e1p su\u1ea5t th\u1ea5p. \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng c\u1ea5p n\u01b0\u1edbc, th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng \u0111\u1ec3 ng\u0103n ng\u1eeba \u0103n m\u00f2n. \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng kh\u00ed, th\u00e9p carbon l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn v\u00e0 kinh t\u1ebf. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 \u0111\u1ea3m b\u1ea3o \u00e1p su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng n\u1eb1m trong gi\u1edbi h\u1ea1n \u00e1p su\u1ea5t c\u1ee7a SCH20.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111o k\u00edch th\u01b0\u1edbc c\u1ee7a m\u1ed9t \u1ed1ng cong SCH20 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 3 inch cho vi\u1ec7c thay th\u1ebf ho\u1eb7c l\u1eafp \u0111\u1eb7t m\u1edbi?<\/h3>\n<p>\u0110\u1ec3 \u0111o m\u1ed9t g\u00f3c cong 3 inch SCH20, b\u1ea1n c\u1ea7n x\u00e1c nh\u1eadn ba th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh. \u0110\u1ea7u ti\u00ean, x\u00e1c minh k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a l\u00e0 3 inch. Ti\u1ebfp theo, ki\u1ec3m tra xem \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng c\u00f3 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n SCH20 hay kh\u00f4ng. Cu\u1ed1i c\u00f9ng, \u0111o kho\u1ea3ng c\u00e1ch t\u1eeb t\u00e2m \u0111\u1ebfn \u0111\u1ea7u \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem \u0111\u00f3 l\u00e0 g\u00f3c cong b\u00e1n k\u00ednh d\u00e0i hay b\u00e1n k\u00ednh ng\u1eafn.<\/p>\n<h2>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a \u1ed1ng t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u?<\/h2>\n<p>\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a m\u1ed9t c\u00fat 3 inch Sch20 t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u, h\u00e3y t\u00ecm k\u00edch th\u01b0\u1edbc \u1ed1ng danh ngh\u0129a t\u01b0\u01a1ng \u1ee9ng. B\u1ea3ng d\u1eef li\u1ec7u th\u01b0\u1eddng cung c\u1ea5p c\u00e1c k\u00edch th\u01b0\u1edbc cho c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong. \u0110\u1ed1i v\u1edbi c\u00fat 3 inch Sch20, \u0111\u01b0\u1eddng k\u00ednh trong th\u01b0\u1eddng kho\u1ea3ng 3,068 inch, \u0111\u1ea3m b\u1ea3o s\u1ef1 v\u1eeba v\u1eb7n ph\u00f9 h\u1ee3p cho nhu c\u1ea7u l\u1eafp \u0111\u1eb7t \u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n<h2>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a \u1ed1ng t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u?<\/h2>\n<p>\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a m\u1ed9t c\u00fat 3 inch Sch 20 t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u, h\u00e3y t\u00ecm ph\u1ea7n t\u01b0\u01a1ng \u1ee9ng d\u00e0nh cho \u1ed1ng 3 inch. B\u1ea3ng d\u1eef li\u1ec7u th\u01b0\u1eddng cung c\u1ea5p c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng; tr\u1eeb \u0111i hai l\u1ea7n \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng t\u1eeb \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i \u0111\u1ec3 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c \u0111\u01b0\u1eddng k\u00ednh trong.<\/p>","protected":false},"excerpt":{"rendered":"<p>Key Highlights A 3 inch SCH20 elbow is a pipe fitting used to change direction in low-pressure piping systems. The main types are the long radius for smoother flow and the short radius for installations in tight spaces. SCH20 elbows are not suitable for high pressure applications, as they are designed for use in low-pressure [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":3697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[393],"tags":[],"class_list":["post-3699","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-information"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/posts\/3699","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/comments?post=3699"}],"version-history":[{"count":0,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/posts\/3699\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/media\/3697"}],"wp:attachment":[{"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/media?parent=3699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/categories?post=3699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hfittings.com\/vi\/wp-json\/wp\/v2\/tags?post=3699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}