{"id":41,"date":"2026-10-10T16:40:29","date_gmt":"2026-10-10T08:40:29","guid":{"rendered":"http:\/\/yuannaitube.com\/en_us\/tubing-id-od-wall-thickness\/"},"modified":"2026-11-05T14:53:27","modified_gmt":"2026-11-05T06:53:27","slug":"duong-kinh-trong-duong-kinh-ngoai-do-day-thanh-ong","status":"publish","type":"post","link":"https:\/\/yuannaitube.com\/vi\/tubing-id-od-wall-thickness\/","title":{"rendered":"K\u00edch th\u01b0\u1edbc \u1ed1ng: \u0111\u01b0\u1eddng k\u00ednh trong (ID), \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng<\/strong>"},"content":{"rendered":"
\n

K\u00edch th\u01b0\u1edbc \u1ed1ng: \u0111\u01b0\u1eddng k\u00ednh trong (ID), \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng<\/strong><\/h2>\n

M\u1ed9t \u1ed1ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ba k\u00edch th\u01b0\u1edbc \u1ed1ng<\/strong>: \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) quy\u1ebft \u0111\u1ecbnh c\u00e1ch n\u00f3 k\u1ebft n\u1ed1i v\u1edbi kh\u1edbp n\u1ed1i c\u1eafm, \u0111\u01b0\u1eddng k\u00ednh trong (ID) quy\u1ebft \u0111\u1ecbnh l\u01b0u l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 s\u1ee5t \u00e1p, v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng<\/strong> quy \u0111\u1ecbnh m\u1ee9c \u00e1p su\u1ea5t \u0111\u1ecbnh m\u1ee9c. \u0110\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng danh ngh\u0129a \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: (\u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i \u2212 \u0110\u01b0\u1eddng k\u00ednh trong) \u00f7 2. \u0110\u1ec3 ki\u1ec3m tra Dung sai c\u1ee7a \u1ed1ng kh\u00ed n\u00e9n<\/strong>, \u0111o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong (ID) b\u1eb1ng c\u00e1c thi\u1ebft b\u1ecb quang h\u1ecdc ho\u1eb7c ti\u1ebfp x\u00fac \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n (C\u00e1ch \u0111o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong (ID) c\u1ee7a \u1ed1ng<\/strong> (s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf ph\u1ea7n d\u01b0\u1edbi \u0111\u00e2y).<\/p>\n<\/div>\n

M\u1ed9t ph\u1ea7n c\u1ee7a H\u01b0\u1edbng d\u1eabn v\u1ec1 \u1ed1ng d\u1eabn kh\u00ed n\u00e9n<\/a>.<\/small><\/p>\n

M\u1ecdi k\u00edch th\u01b0\u1edbc m\u00e0 ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t, bao g\u1ed3m \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD), \u0111\u01b0\u1eddng k\u00ednh trong (ID), \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 \u00e1p su\u1ea5t l\u00e0m vi\u1ec7c, \u0111\u1ec1u n\u1eb1m trong B\u1ea3ng k\u00edch th\u01b0\u1edbc \u1ed1ng<\/a>.<\/small><\/p>\n

\u0110\u01b0\u1eddng k\u00ednh trong v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i<\/h2>\n

\u0110\u01b0\u1eddng k\u00ednh trong (ID) ch\u1ec9 k\u00edch th\u01b0\u1edbc b\u00ean trong \u1ed1ng. \u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) ch\u1ec9 k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i \u1ed1ng. Lu\u00f4n x\u00e1c \u0111\u1ecbnh r\u00f5 b\u1ea3n v\u1ebd ho\u1eb7c y\u00eau c\u1ea7u mua h\u00e0ng quy \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc n\u00e0o.<\/p>\n

T\u00ednh to\u00e1n \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p l\u1ef1c<\/h2>\n

\u0110\u1ed1i v\u1edbi \u1ed1ng tr\u00f2n c\u00f3 th\u00e0nh \u0111\u1ed3ng nh\u1ea5t, \u0111\u1ed9 d\u00e0y th\u00e0nh danh ngh\u0129a \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng (\u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i \u2212 \u0111\u01b0\u1eddng k\u00ednh trong) \u00f7 2. C\u00e1c k\u00edch th\u01b0\u1edbc ph\u1ea3i s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t \u0111\u01a1n v\u1ecb. Gi\u00e1 tr\u1ecb danh ngh\u0129a kh\u00f4ng x\u00e1c \u0111\u1ecbnh dung sai gia c\u00f4ng.<\/p>\n

X\u00e1c nh\u1eadn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7<\/h2>\n

C\u1ea7n n\u00eau r\u00f5 dung sai k\u00edch th\u01b0\u1edbc, v\u1eadt li\u1ec7u, \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 k\u1ebft n\u1ed1i. \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng \u00e1p su\u1ea5t cao<\/a> v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng chuy\u1ec3n h\u00f3a ch\u1ea5t<\/a>, \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng v\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn h\u01a1n so v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc \u1ed1ng kh\u00ed n\u00e9n ti\u00eau chu\u1ea9n., v\u1eadt li\u1ec7u, \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh v\u00e0 y\u00eau c\u1ea7u k\u1ebft n\u1ed1i. Ch\u1ec9 ri\u00eang c\u00e1c k\u00edch th\u01b0\u1edbc kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u00e1p su\u1ea5t \u0111\u1ecbnh m\u1ee9c hay t\u00ednh t\u01b0\u01a1ng th\u00edch h\u00f3a h\u1ecdc.<\/p>\n

B\u1ea3ng k\u00edch th\u01b0\u1edbc \u1ed1ng kh\u00ed n\u00e9n: h\u00e3y xem c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh trong (ID) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD)<\/h2>\n

K\u00edch th\u01b0\u1edbc \u1ed1ng kh\u00ed n\u00e9n<\/strong> c\u1ea7n n\u00eau r\u00f5 ID, OD v\u00e0 \u0111\u01a1n v\u1ecb \u0111o. Trong b\u1ea3ng k\u00edch th\u01b0\u1edbc s\u1ea3n ph\u1ea9m, h\u00e3y ghi r\u00f5 m\u00e3 s\u1ea3n ph\u1ea9m k\u00e8m theo c\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 ki\u1ec3m tra \u0111\u01b0\u1eddng k\u00ednh m\u00e0 \u0111\u1ea7u n\u1ed1i y\u00eau c\u1ea7u. Ch\u1ec9 m\u1ed9t \u0111\u01b0\u1eddng k\u00ednh duy nh\u1ea5t kh\u00f4ng th\u1ec3 m\u00f4 t\u1ea3 \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng s\u1ed1 c\u1ee7a \u1ed1ng.<\/p>\n

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  1. X\u00e1c \u0111\u1ecbnh v\u1eadt li\u1ec7u v\u00e0 m\u00e3 s\u1ea3n ph\u1ea9m c\u1ea7n d\u00f9ng.<\/li>\n
  2. Ghi l\u1ea1i \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong (ID) b\u1eb1ng c\u00f9ng m\u1ed9t \u0111\u01a1n v\u1ecb \u0111o.<\/li>\n
  3. H\u00e3y ki\u1ec3m tra th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a \u0111\u1ea7u n\u1ed1i v\u00e0 dung sai k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/li>\n
  4. H\u00e3y xem x\u00e9t ri\u00eang bi\u1ec7t c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u00e1p su\u1ea5t, nhi\u1ec7t \u0111\u1ed9 v\u00e0 l\u1eafp \u0111\u1eb7t.<\/li>\n<\/ol>\n

    S\u1eed d\u1ee5ng c\u00e1c b\u1ea3ng m\u00f4 h\u00ecnh th\u1ef1c t\u1ebf cho \u1ed0ng kh\u00ed n\u00e9n PU<\/a>, PA6<\/a>, PA12<\/a> ho\u1eb7c \u1ed0ng kh\u00ed n\u00e9n PE (polyethylene)<\/a>. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc \u1ed1ng kh\u00ed n\u00e9n; h\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00f4ng thay th\u1ebf cho vi\u1ec7c t\u00ednh to\u00e1n l\u01b0u l\u01b0\u1ee3ng c\u0169ng nh\u01b0 kh\u00f4ng kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng c\u00f3 s\u1eb5n k\u00edch th\u01b0\u1edbc n\u00e0o \u0111\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea trong danh m\u1ee5c.<\/p>\n

    V\u00ed d\u1ee5 minh h\u1ecda c\u00f3 k\u00edch th\u01b0\u1edbc c\u1ee5 th\u1ec3<\/h2>\n

    \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) 8 mm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong (ID) 5 mm, \u0111\u1ed9 d\u00e0y th\u00e0nh danh ngh\u0129a l\u00e0 (8 \u2212 5) \u00f7 2 = 1,5 mm. \u0110\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t v\u00ed d\u1ee5 t\u00ednh to\u00e1n, kh\u00f4ng ph\u1ea3i l\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ea3n ph\u1ea9m hay gi\u1edbi h\u1ea1n ch\u1ea5p nh\u1eadn.<\/p>\n

    Chu\u1ea9n b\u1ecb y\u00eau c\u1ea7u b\u00e1o gi\u00e1 k\u00e8m th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc \u2192<\/a><\/p>\n

    C\u00e1ch \u0111o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong (ID) c\u1ee7a \u1ed1ng: Ti\u00eau chu\u1ea9n \u0111o l\u01b0\u1eddng v\u00e0 dung sai<\/h2>\n

    ASTM International c\u00f4ng b\u1ed1 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0111\u1ec3 \u0111o k\u00edch th\u01b0\u1edbc \u1ed1ng. Ph\u1ea1m vi \u00e1p d\u1ee5ng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y nh\u01b0 sau:<\/p>\n

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    \u201cThis test method covers the determination of diameter, wall thickness, and length dimensions of thermoplastic pipe.\u201d<\/p>\n