{"id":1281,"date":"2026-01-30T08:51:32","date_gmt":"2026-01-30T08:51:32","guid":{"rendered":"https:\/\/www.ykyvalve.com\/?p=1281"},"modified":"2026-02-04T09:01:12","modified_gmt":"2026-02-04T09:01:12","slug":"pipeline-valves-vs-general-valves","status":"publish","type":"post","link":"https:\/\/www.ykyvalve.com\/vi\/blog\/pipeline-valves\/pipeline-valves-vs-general-valves\/","title":{"rendered":"Van Trung Qu\u1ed1c | Van \u0111\u01b0\u1eddng \u1ed1ng so v\u1edbi van th\u00f4ng th\u01b0\u1eddng"},"content":{"rendered":"
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\"\"<\/a><\/figure>\n<\/div>\n\n\n

Van \u0111\u01b0\u1eddng \u1ed1ng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o cho c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng d\u00e0i, n\u01a1i vi\u1ec7c ti\u1ebfp c\u1eadn b\u1ecb h\u1ea1n ch\u1ebf v\u00e0 c\u00e1c quy \u0111\u1ecbnh an to\u00e0n r\u1ea5t nghi\u00eam ng\u1eb7t. Van th\u00f4ng d\u1ee5ng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o cho c\u00e1c nh\u00e0 m\u00e1y, n\u01a1i ng\u01b0\u1eddi lao \u0111\u1ed9ng c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn thi\u1ebft b\u1ecb v\u00e0 b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3. <\/p>\n\n\n\n

Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm hi\u1ec3u n\u0103m \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh, \u00fd ngh\u0129a c\u1ee7a ch\u00fang trong c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf v\u00e0 c\u00e1ch ch\u00fang gi\u00fap b\u1ea1n tr\u00e1nh r\u00f2 r\u1ec9, th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 chi ph\u00ed thay th\u1ebf t\u1ed1n k\u00e9m.<\/p>\n\n\n\n

V\u00ec sao \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 h\u1ec7 th\u1ed1ng nh\u00e0 m\u00e1y l\u1ea1i kh\u00e1c nhau?<\/h2>\n\n\n\n

\u0110\u01b0\u1eddng \u1ed1ng d\u1eabn c\u00f3 th\u1ec3 d\u00e0i h\u00e0ng tr\u0103m ki-l\u00f4-m\u00e9t. Ng\u01b0\u1eddi v\u1eadn h\u00e0nh c\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n n\u00f3 t\u1eeb m\u1ed9t tr\u1ea1m \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa ho\u1eb7c ph\u00f2ng \u0111i\u1ec1u khi\u1ec3n trung t\u00e2m. Vi\u1ec7c tu\u1ea7n tra v\u00e0 ki\u1ec3m tra \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n, nh\u01b0ng kh\u00f4ng ph\u1ea3i m\u1ed7i gi\u1edd. <\/p>\n\n\n\n

H\u1ec7 th\u1ed1ng van trong nh\u00e0 m\u00e1y th\u01b0\u1eddng n\u1eb1m b\u00ean trong m\u1ed9t c\u01a1 s\u1edf. Nh\u00e2n vi\u00ean c\u00f3 th\u1ec3 ki\u1ec3m tra van th\u01b0\u1eddng xuy\u00ean. Vi\u1ec7c l\u00ean k\u1ebf ho\u1ea1ch s\u1eeda ch\u1eefa c\u0169ng d\u1ec5 d\u00e0ng h\u01a1n. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao d\u1ef1 \u00e1n \u0111\u01b0\u1eddng \u1ed1ng van th\u01b0\u1eddng c\u1ea7n thi\u1ebft k\u1ebf kh\u00e1c v\u1edbi van \u0111\u00f3ng ng\u1eaft nh\u00e0 m\u00e1y. N\u1ebfu b\u1ea1n l\u00e0 ng\u01b0\u1eddi m\u1edbi, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm ki\u1ebfm trong c\u1ea9m nang v\u1ec1 van, \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c thu\u1eadt ng\u1eef c\u01a1 b\u1ea3n. \u0110i\u1ec1u n\u00e0y h\u1eefu \u00edch cho vi\u1ec7c h\u1ecdc t\u1eadp, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c khi mua h\u00e0ng.<\/p>\n\n\n\n

N\u0103m \u0111i\u1ec3m kh\u00e1c bi\u1ec7t quan tr\u1ecdng nh\u1ea5t<\/h2>\n\n\n\n

1) T\u1ed1c \u0111\u1ed9 t\u1eaft m\u00e1y v\u00e0 logic an to\u00e0n<\/h3>\n\n\n\n

Trong \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn, van c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u0111\u00f3ng l\u1ea1i trong tr\u01b0\u1eddng h\u1ee3p v\u1ee1 \u0111\u01b0\u1eddng \u1ed1ng ho\u1eb7c s\u1ef1 c\u1ed1 l\u1edbn. Van ng\u1eaft kh\u1ea9n c\u1ea5p \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 lu\u00f4n m\u1edf trong \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng. <\/p>\n\n\n\n

Sau \u0111\u00f3, n\u00f3 ph\u1ea3i \u0111\u00f3ng nhanh khi c\u1ea7n thi\u1ebft. Vi\u1ec7c hi\u1ec3n th\u1ecb v\u1ecb tr\u00ed c\u0169ng r\u1ea5t quan tr\u1ecdng. Ng\u01b0\u1eddi v\u1eadn h\u00e0nh ph\u1ea3i bi\u1ebft n\u00f3 \u0111ang m\u1edf hay \u0111\u00f3ng. T\u1ed1c \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi k\u1ebf ho\u1ea1ch an to\u00e0n c\u1ee7a \u0111\u1ecba \u0111i\u1ec3m.<\/p>\n\n\n\n

Trong nh\u00e0 m\u00e1y, nhi\u1ec1u van \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e1ch ly c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ecbnh k\u1ef3. Ng\u01b0\u1eddi v\u1eadn h\u00e0nh c\u00f3 th\u1ec3 \u0111\u00f3ng ch\u00fang t\u1ea1i ch\u1ed7. H\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a kh\u1ea9n c\u1ea5p \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n trong c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n c\u01a1 b\u1ea3n.<\/p>\n\n\n\n

2) M\u00f4-men xo\u1eafn t\u00e1c \u0111\u1ed9ng v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng nguy hi\u1ec3m<\/h3>\n\n\n
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\"\"<\/figure>\n<\/div>\n\n\n

\u0110\u01b0\u1eddng k\u00ednh l\u1edbn v\u00e0 \u00e1p su\u1ea5t cao l\u00e0m t\u0103ng nhu c\u1ea7u m\u00f4-men xo\u1eafn. V\u1eadn h\u00e0nh b\u1eb1ng tay c\u00f3 th\u1ec3 ch\u1eadm. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao b\u1ed9 truy\u1ec1n \u0111\u1ed9ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean c\u00e1c van ch\u1eb7n \u0111\u01b0\u1eddng \u1ed1ng. <\/p>\n\n\n\n

B\u1ed9 truy\u1ec1n \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0 \u0111i\u1ec7n, kh\u00ed n\u00e9n ho\u1eb7c th\u1ee7y l\u1ef1c. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u0169ng s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng kh\u00ed-d\u1ea7u. Ph\u01b0\u01a1ng ph\u00e1p l\u1ef1a ch\u1ecdn ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u v\u1ec1 c\u00f4ng su\u1ea5t v\u00e0 th\u1eddi gian \u0111\u00f3ng van.<\/p>\n\n\n\n

Trong c\u00e1c khu v\u1ef1c nguy hi\u1ec3m, vi\u1ec7c ch\u1ed1ng ch\u00e1y n\u1ed5 v\u00e0 l\u00e0m k\u00edn v\u1ecf thi\u1ebft b\u1ecb l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh c\u00e1c kh\u00e1i ni\u1ec7m b\u1ea3o v\u1ec7 ATEX\/IECEx v\u00e0 x\u1ebfp h\u1ea1ng IP v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng n\u01b0\u1edbc v\u00e0 b\u1ee5i x\u00e2m nh\u1eadp.<\/p>\n\n\n\n

3) Ki\u1ec3m so\u00e1t r\u00f2 r\u1ec9 v\u00e0 c\u00e1c \u0111i\u1ec3m ni\u00eam phong b\u00ean ngo\u00e0i<\/h3>\n\n\n\n

Nhi\u1ec1u \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn kh\u00ed ch\u1ea1y g\u1ea7n r\u00eca th\u00e0nh ph\u1ed1. M\u1ed9t r\u00f2 r\u1ec9 nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh r\u1ee7i ro l\u1edbn. Thi\u1ebft k\u1ebf \u0111\u01b0\u1eddng \u1ed1ng th\u01b0\u1eddng nh\u1eb1m m\u1ee5c \u0111\u00edch gi\u1ea3m thi\u1ec3u \u0111\u01b0\u1eddng r\u00f2 r\u1ec9 v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c gi\u1edbi h\u1ea1n ng\u1eaft nghi\u00eam ng\u1eb7t. <\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ch\u00f4n ng\u1ea7m ho\u1eb7c quan tr\u1ecdng, m\u1ed9t s\u1ed1 thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng th\u00e2n m\u00e1y h\u00e0n k\u00edn ho\u00e0n to\u00e0n. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng m\u1ed1i n\u1ed1i m\u1eb7t b\u00edch v\u00e0 \u0111i\u1ec3m gio\u0103ng b\u00ean ngo\u00e0i. Tuy nhi\u00ean, n\u00f3 c\u0169ng l\u00e0m cho vi\u1ec7c b\u1ea3o tr\u00ec t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng kh\u00f3 kh\u0103n h\u01a1n, v\u00ec v\u1eady vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch r\u1ea5t quan tr\u1ecdng. <\/p>\n\n\n\n

V\u1eadt li\u1ec7u l\u00e0m k\u00edn v\u00e0 gio\u0103ng ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9. C\u00e1c lo\u1ea1i polymer ph\u1ed5 bi\u1ebfn bao g\u1ed3m PTFE, nylon, NBR v\u00e0 FKM (th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Viton).<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

4) R\u1ee7i ro \u0103n m\u00f2n v\u00e0 ti\u1ebfp x\u00fac v\u1edbi kh\u00ed chua (H\u2082S)<\/h3>\n\n\n\n

Kh\u00ed t\u1ef1 nhi\u00ean c\u00f3 th\u1ec3 ch\u1ee9a hydro sunfua (H\u2082S). H\u2082S \u0111\u1ed9c h\u1ea1i v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n v\u00e0 n\u1ee9t v\u1ee1. Ngay c\u1ea3 sau khi x\u1eed l\u00fd, d\u1ea5u v\u1ebft c\u1ee7a n\u00f3 v\u1eabn c\u00f3 th\u1ec3 c\u00f2n s\u00f3t l\u1ea1i trong m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng. <\/p>\n\n\n\n

Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u tr\u1edf th\u00e0nh m\u1ed9t b\u01b0\u1edbc thi\u1ebft k\u1ebf quan tr\u1ecdng. Ng\u01b0\u1eddi mua th\u01b0\u1eddng s\u1eed d\u1ee5ng h\u01b0\u1edbng d\u1eabn NACE MR0175 \/ ISO 15156 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh gi\u1edbi h\u1ea1n v\u1eadt li\u1ec7u cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n. <\/p>\n\n\n\n

Trong nhi\u1ec1u nh\u00e0 m\u00e1y, \u0103n m\u00f2n v\u1eabn l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng. S\u1ef1 kh\u00e1c bi\u1ec7t n\u1eb1m \u1edf kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn. C\u00e1c \u0111\u01b0\u1eddng \u1ed1ng th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng l\u00e2u h\u01a1n m\u00e0 kh\u00f4ng d\u1ec5 d\u00e0ng thay th\u1ebf.<\/p>\n\n\n\n

5) Tu\u1ed5i th\u1ecd v\u00e0 th\u1ef1c t\u1ebf b\u1ea3o tr\u00ec<\/h3>\n\n\n\n

\u0110\u01b0\u1eddng \u1ed1ng d\u1eabn d\u1ea7u d\u1ef1 ki\u1ebfn s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u n\u0103m m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ng\u1eebng ho\u1ea1t \u0111\u1ed9ng th\u01b0\u1eddng xuy\u00ean. Nhi\u1ec1u nh\u00e0 \u0111i\u1ec1u h\u00e0nh \u0111\u1eb7t m\u1ee5c ti\u00eau v\u1eadn h\u00e0nh c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng ch\u00ednh trong nhi\u1ec1u th\u1eadp k\u1ef7. C\u00e1c b\u1ed9 ph\u1eadn ch\u1ecbu m\u00e0i m\u00f2n v\u00e0 b\u1ec1 m\u1eb7t l\u00e0m k\u00edn ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau \u0111\u00f3. <\/p>\n\n\n\n

C\u00e1c h\u1ec7 th\u1ed1ng nh\u00e0 m\u00e1y c\u00f3 th\u1ec3 c\u00f3 th\u1eddi gian b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3. Vi\u1ec7c thay th\u1ebf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00ean k\u1ebf ho\u1ea1ch. C\u00e1c \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn d\u1ea7u c\u1ed1 g\u1eafng tr\u00e1nh t\u00ecnh tr\u1ea1ng gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9t xu\u1ea5t v\u00ec nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng ph\u1ee5 thu\u1ed9c v\u00e0o ngu\u1ed3n cung \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n

B\u1ea3ng so s\u00e1nh \u0111\u01a1n gi\u1ea3n d\u00e0nh cho ng\u01b0\u1eddi mua nh\u00e0 l\u1ea7n \u0111\u1ea7u<\/h2>\n\n\n\n
\u0110\u1ec1 t\u00e0i<\/strong><\/td>D\u1ecbch v\u1ee5 \u0111\u01b0\u1eddng \u1ed1ng<\/strong><\/td>D\u1ecbch v\u1ee5 chung\/Nh\u00e0 m\u00e1y<\/strong><\/td><\/tr><\/thead>
Truy c\u1eadp<\/strong><\/td>L\u00e0m vi\u1ec7c t\u1eeb xa, s\u1ed1 l\u1ea7n th\u0103m h\u1ea1n ch\u1ebf<\/td>D\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn c\u01a1 s\u1edf v\u1eadt ch\u1ea5t<\/td><\/tr>
Vai tr\u00f2 t\u1eaft m\u00e1y<\/strong><\/td>C\u00f3 th\u1ec3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a bi\u1ec7n ph\u00e1p c\u00e1ch ly kh\u1ea9n c\u1ea5p.<\/td>Th\u01b0\u1eddng l\u00e0 c\u00e1ch ly theo quy tr\u00ecnh<\/td><\/tr>
Ho\u1ea1t \u0111\u1ed9ng<\/strong><\/td>K\u00edch ho\u1ea1t chung<\/td>H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng<\/td><\/tr>
T\u1eadp trung v\u00e0o r\u00f2 r\u1ec9<\/strong><\/td>R\u1ea5t nghi\u00eam ng\u1eb7t v\u1ec1 vi\u1ec7c \u0111\u00f3ng ng\u1eaft v\u00e0 r\u00f2 r\u1ec9 b\u00ean ngo\u00e0i.<\/td>C\u1ea7n \u0111\u1ed9 si\u1ebft ch\u1eb7t, d\u1ec5 s\u1eeda ch\u1eefa h\u01a1n<\/td><\/tr>
Nguy\u00ean v\u1eadt li\u1ec7u<\/strong><\/td>Th\u01b0\u1eddng th\u00ec, s\u1ef1 \u0103n m\u00f2n v\u00e0 gi\u1edbi h\u1ea1n chua<\/td>T\u00f9y thu\u1ed9c v\u00e0o ch\u1ea5t l\u1ecfng trong quy tr\u00ecnh.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Nh\u1eefng g\u00ec m\u00e0 thi\u1ebft k\u1ebf \u201c\u0111\u1ea1t ti\u00eau chu\u1ea9n \u0111\u01b0\u1eddng \u1ed1ng\u201d th\u01b0\u1eddng bao g\u1ed3m<\/h2>\n\n\n
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\"\"<\/figure>\n<\/div>\n\n\n

L\u01b0u l\u01b0\u1ee3ng t\u1ed1i \u0111a cho qu\u00e1 tr\u00ecnh l\u00e0m s\u1ea1ch \u0111\u01b0\u1eddng \u1ed1ng<\/h3>\n\n\n\n

Nhi\u1ec1u \u0111\u01b0\u1eddng \u1ed1ng s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb l\u00e0m s\u1ea1ch ho\u1eb7c ki\u1ec3m tra d\u1ea1ng "pig". C\u00e1c van c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn gi\u1eef cho l\u1ed7 van g\u1ea7n b\u1eb1ng k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1eddng \u1ed1ng, nh\u1edd \u0111\u00f3 c\u00e1c thi\u1ebft b\u1ecb pig c\u00f3 th\u1ec3 \u0111i qua m\u1ed9t c\u00e1ch tr\u01a1n tru. Van bi<\/a> Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch n\u00e0y, nh\u01b0ng k\u00edch th\u01b0\u1edbc l\u1ed7 khoan l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t.<\/p>\n\n\n\n

C\u00e1c l\u1ef1a ch\u1ecdn l\u1eafp \u0111\u1eb7t v\u00e0 k\u1ebft n\u1ed1i ng\u1ea7m<\/h3>\n\n\n\n

Van ch\u00f4n ng\u1ea7m gi\u00fap gi\u1ea3m nguy c\u01a1 h\u01b0 h\u1ecfng nh\u01b0ng kh\u00f3 ti\u1ebfp c\u1eadn h\u01a1n. C\u00e1c chi ti\u1ebft thi\u1ebft k\u1ebf ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n