{"id":2114,"date":"2025-03-01T10:36:01","date_gmt":"2025-03-01T02:36:01","guid":{"rendered":"https:\/\/led.amasly.com\/?p=2114"},"modified":"2025-03-07T21:26:35","modified_gmt":"2025-03-07T13:26:35","slug":"explosion-proof-plugging-parts-related-knowledge","status":"publish","type":"post","link":"https:\/\/led.amasly.com\/vi\/explosion-proof-equipment\/explosion-proof-plugging-parts-related-knowledge\/","title":{"rendered":"Ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn c\u00e1c b\u1ed9 ph\u1eadn ch\u1ed1ng ch\u00e1y n\u1ed5"},"content":{"rendered":"

Ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1c b\u1ed9 ph\u1eadn ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong><\/strong><\/h1>\n\n\n\n

Trong c\u00e1c khu v\u1ef1c c\u00f3 nguy c\u01a1 ch\u00e1y n\u1ed5 c\u1ee7a c\u00e1c doanh nghi\u1ec7p h\u00f3a ch\u1ea5t, vi\u1ec7c s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111i\u1ec7n ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1eb1m ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3 c\u00e1c tia l\u1eeda \u0111i\u1ec7n do thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1ea1o ra., \u0110\u1ec3 tr\u00e1nh r\u00f2 r\u1ec9 kh\u00ed d\u1ec5 ch\u00e1y xung quanh v\u00e0o thi\u1ebft b\u1ecb \u0111i\u1ec7n b\u00ean trong v\u1ee5 n\u1ed5 flash.<\/strong><\/p>\n\n\n\n

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

Y\u00eau c\u1ea7u chung \u0111\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a thi\u1ebft b\u1ecb ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong><\/strong><\/h2>\n\n\n\n

I. <\/strong>Ph\u1ee5 ki\u1ec7n c\u1ed1 \u0111\u1ecbnh<\/strong><\/strong><\/h2>\n\n\n\n

1. C\u00e1c bul\u00f4ng ph\u1ea3i c\u00f3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc \u0111\u1ee7 \u0111\u1ec3 kh\u00f4ng g\u00e2y g\u00e3y bul\u00f4ng khi v\u1ecf n\u1ed5.<\/p>\n\n\n\n

2. C\u00e1c bulong ph\u1ea3i c\u00f3 t\u00ednh n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 ch\u1ed1ng l\u1ecfng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kho\u1ea3ng h\u1edf c\u1ee7a b\u1ec1 m\u1eb7t kh\u1edbp ch\u1ed1ng ch\u00e1y n\u1ed5 lo\u1ea1i ph\u1eb3ng.<\/p>\n\n\n\n

3. Khi si\u1ebft ch\u1eb7t b\u1eb1ng bu l\u00f4ng, n\u1ebfu s\u1eed d\u1ee5ng \u0111\u1ec7m l\u00f2 xo \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c l\u1ecfng l\u1ebbo, ch\u1ec9 c\u1ea7n \u00e9p ph\u1eb3ng \u0111\u1ec7m l\u00f2 xo v\u00e0 kh\u00f4ng n\u00ean si\u1ebft qu\u00e1 ch\u1eb7t.<\/p>\n\n\n\n

4. \u0110\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng c\u1eaft \u0111\u1ee9t c\u00e1c bu l\u00f4ng c\u1ed1 \u0111\u1ecbnh do l\u1ef1c t\u00e1c \u0111\u1ed9ng t\u1eeb b\u00ean ngo\u00e0i, c\u00e1c k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i c\u1ee7a c\u00e1c m\u1ed1i n\u1ed1i gi\u1eefa n\u1eafp v\u00e0 v\u1ecf ph\u1ea3i gi\u1ed1ng nhau.<\/p>\n\n\n\n

5. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u1eafc ch\u1eafn khi l\u1eafp \u0111\u1eb7t, v\u1eadt li\u1ec7u c\u1ee7a bu l\u00f4ng v\u00e0 \u0111ai \u1ed1c kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u1ef1a ho\u1eb7c h\u1ee3p kim nh\u1eb9, v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c khoan l\u1ed7 v\u00edt tr\u1ef1c ti\u1ebfp tr\u00ean v\u1ecf nh\u1ef1a.<\/p>\n\n\n\n

6. \u0110\u1ed9 s\u00e2u c\u1ee7a l\u1ed7 v\u00edt kh\u00f4ng th\u1ea5m n\u01b0\u1edbc ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng sau khi si\u1ebft ch\u1eb7t, kho\u1ea3ng c\u00e1ch gi\u1eefa bulong v\u00e0 l\u1ed7 v\u00edt ph\u1ea3i l\u1edbn h\u01a1n g\u1ea5p 2 l\u1ea7n \u0111\u1ed9 d\u00e0y c\u1ee7a bi\u00ean ren c\u1ee7a \u0111\u1ec7m kh\u00f3a.<\/p>\n\n\n\n

7. \u0110\u1ed9 d\u00e0y xung quanh v\u00e0 \u1edf \u0111\u00e1y l\u1ed7 v\u00edt kh\u00f4ng th\u1ea5m n\u01b0\u1edbc ph\u1ea3i kh\u00f4ng nh\u1ecf h\u01a1n m\u1ed9t ph\u1ea7n ba \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a bul\u00f4ng, nh\u01b0ng ph\u1ea3i c\u00f3 kho\u1ea3ng c\u00e1ch t\u1ed1i thi\u1ec3u 3,0 mm.<\/p>\n\n\n\n

8, qu\u00e1 tr\u00ecnh gia c\u00f4ng l\u1ed7 th\u00f4ng qua ho\u1eb7c c\u1ea5u tr\u00fac ph\u1ea3i xuy\u00ean qua v\u1ecf c\u1ee7a l\u1ed7 v\u00edt, ph\u1ea3i s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac ch\u1ed1ng ch\u00e1y n\u1ed5 d\u1ea1ng tr\u1ee5 tr\u00f2n ho\u1eb7c c\u00f3 ren \u0111\u1ec3 b\u1ecbt k\u00edn, \u0111\u1ea7u l\u1ed9 ra ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u0129nh vi\u1ec5n.<\/p>\n\n\n\n

II. <\/strong>Ph\u00edch c\u1eafm<\/strong><\/strong><\/h2>\n\n\n\n
\"\"<\/a><\/figure><\/div>\n\n\n\n

V\u1edbi vi\u1ec7c ch\u00ednh th\u1ee9c ban h\u00e0nh phi\u00ean b\u1ea3n 2021 c\u1ee7a ti\u00eau chu\u1ea9n GB\/T3836, GB\/T 3836.2-2021 \u0111\u00e3 b\u1ed5 sung c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n Ex, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t so v\u1edbi GB 3836.2-2010 nh\u01b0 sau:<\/p>\n\n\n\n

1. Ti\u00eau chu\u1ea9n GB 3836.2-2010, \u0110i\u1ec1u 11 quy \u0111\u1ecbnh v\u1ec1 \u201cph\u1ee5 ki\u1ec7n, l\u1ed7 li\u00ean quan v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n\u201d, trong ti\u00eau chu\u1ea9n GB\/T 3836.2-2021, \u0110i\u1ec1u 11 \u0111\u00e3 lo\u1ea1i b\u1ecf c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n, \u0110i\u1ec1u 13.8 quy \u0111\u1ecbnh ri\u00eang v\u1ec1 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n, v\u00e0 c\u00e1c y\u00eau c\u1ea7u c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh t\u1ea1i \u0110i\u1ec1u C2.3.1.<\/p>\n\n\n\n

2. GB\/T 3836.2-2021 Ph\u1ee5 l\u1ee5c C.2.3 theo \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac s\u1ebd \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c b\u1ed9 ph\u1eadn b\u1ecbt k\u00edn Ex theo ti\u00eau chu\u1ea9n m\u00e9t, c\u00e1c b\u1ed9 ph\u1eadn b\u1ecbt k\u00edn Ex theo ti\u00eau chu\u1ea9n NPT v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn b\u1ecbt k\u00edn Ex kh\u00f4ng c\u00f3 ren, v\u1edbi c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n

(1) C\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n theo ti\u00eau chu\u1ea9n Metric Ex ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u sau \u0111\u00e2y \u0111\u1ec3 gi\u1ea3i quy\u1ebft vi\u1ec7c xu\u1ea5t hi\u1ec7n l\u1ed7 tr\u00ean v\u1ecf b\u1eb1ng c\u00e1ch gi\u1eef b\u1ec1 m\u1eb7t ngo\u00e0i c\u1ee7a b\u1ed9 ph\u1eadn ch\u1eb7n c\u00e0ng g\u1ea7n v\u1ecf c\u00e0ng t\u1ed1t:<\/p>\n\n\n\n

a. Ph\u1ea3i c\u00f3 c\u00e1c v\u00e0nh ho\u1eb7c dao r\u1ed7ng \u0111\u1ec3 ng\u0103n ch\u1eb7n b\u1ed9 ph\u1eadn ch\u1eb7n Ex \u0111i qua ho\u00e0n to\u00e0n v\u1ecf m\u00e1y, v\u00e0 trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 c\u00e1c v\u00e0nh, ph\u1ea3i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 \u0111\u1ed9 d\u00e0y \u0111\u1ee7 \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c th\u00e1o g\u1ee1 b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n kh\u00e1c ngo\u00e0i nh\u1eefng ph\u01b0\u01a1ng ti\u1ec7n \u0111\u01b0\u1ee3c ph\u00e9p n\u00eau tr\u00ean;<\/p>\n\n\n\n

b. C\u00e1c ren ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng \u1ee9ng trong c\u00e1c m\u1ed1i n\u1ed1i ch\u1ed1ng ch\u00e1y n\u1ed5 (C.2.2).<\/p>\n\n\n\n

(2) C\u00e1c th\u00e0nh vi\u00ean b\u1ecb c\u1ea5m tham gia NPT ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u sau:<\/p>\n\n\n\n

a. Ph\u1ea3i kh\u00f4ng c\u00f3 flange;<\/p>\n\n\n\n

b. C\u00e1c lo\u1ea1i ren \u1ed1ng ph\u1ea3i tu\u00e2n th\u1ee7 Ti\u00eau chu\u1ea9n M\u1ef9 v\u1ec1 Ren \u1ed0ng N\u00f3n (NPT) ANSI\/ASME B1.20.1.;<\/p>\n\n\n\n

c. Ph\u1ea3i c\u00f3 r\u00e3nh \u0111\u1ec3 \u0111\u1eb7t d\u1ee5ng c\u1ee5 (nh\u01b0 trong H\u00ecnh C.2);<\/p>\n\n\n\n

d. Chi\u1ec1u d\u00e0i hi\u1ec7u d\u1ee5ng c\u1ee7a ren kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n k\u00edch th\u01b0\u1edbc \u201cL2\u201d.<\/p>\n\n\n\n

(3) N\u1eafp c\u1eafm kh\u00f4ng ren (Ch\u1ec9 lo\u1ea1i I)<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb lo\u1ea1i I, c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n l\u1ed7 s\u00e1ng (l\u1ed7 kh\u00f4ng ren) ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u c\u1ee7a C.2.2.2 v\u00e0 C.2.3.1 trong ti\u00eau chu\u1ea9n GB\/T3836.2-2021.<\/p>\n\n\n\n

C\u1ea7n \u0111\u1eb7c bi\u1ec7t ch\u00fa \u00fd:<\/p>\n\n\n\n

(1) Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng ph\u00edch c\u1eafm v\u1edbi c\u00e1c ph\u1ee5 ki\u1ec7n c\u00f3 ren.<\/p>\n\n\n\n

(2) C\u00e1c n\u00fat ren NPT kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi c\u1ea5u tr\u00fac c\u00f3 v\u00e0nh.<\/p>\n\n\n\n

Thi\u1ebft b\u1ecb \u0111i\u1ec7n ch\u1ed1ng ch\u00e1y n\u1ed5 th\u00f4ng d\u1ee5ng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u1eafm.<\/strong><\/strong><\/h2>\n\n\n\n

Thi\u1ebft b\u1ecb \u0111i\u1ec7n ch\u1ed1ng ch\u00e1y kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u1ea7n \u0111\u1ea7u v\u00e0o, vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ch\u1eb7n ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac c\u1ee7a ph\u1ea7n \u0111\u1ea7u v\u00e0o. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1eb7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho thi\u1ebft b\u1ecb \u0111i\u1ec7n ch\u1ed1ng ch\u00e1y kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u1ea7n \u0111\u1ea7u v\u00e0o, s\u1ebd \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch v\u00e0 gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn.<\/p>\n\n\n\n

Ti\u00eau chu\u1ea9n qu\u1ed1c gia GB\/T 3836.1-2021 \u0110i\u1ec1u 16.4 \u201cc\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n<\/strong>\u201d\u0110\u01b0\u1ee3c quy \u0111\u1ecbnh nh\u01b0 sau: D\u00f9ng \u0111\u1ec3 b\u1ecbt c\u00e1c l\u1ed7 th\u1eeba tr\u00ean t\u01b0\u1eddng v\u1ecf c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn ch\u1eb7n c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n, ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u c\u1ee7a lo\u1ea1i ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u1eb7c bi\u1ec7t t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n

Th\u00f4ng th\u01b0\u1eddng, c\u1ea5u tr\u00fac c\u1ee7a c\u1ed5ng k\u1ebft n\u1ed1i \u0111\u1ea7u v\u00e0o c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c chia th\u00e0nh hai tr\u01b0\u1eddng h\u1ee3p:<\/p>\n\n\n\n

1. Tr\u00ean v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5 c\u00f3 thi\u1ebft b\u1ecb d\u1eabn c\u00e1p d\u1ea1ng v\u00f2ng \u0111\u1ec7m, s\u1eed d\u1ee5ng v\u00f2ng \u0111\u1ec7m \u0111\u1ec3 k\u1eb9p v\u1ecf c\u00e1p;<\/p>\n\n\n\n

2. C\u1ed5ng k\u1ebft n\u1ed1i tr\u00ean v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 m\u1ed9t l\u1ed7 xuy\u00ean qua c\u00f3 ren ch\u1ed1ng ch\u00e1y n\u1ed5, c\u1ea7n \u0111\u01b0\u1ee3c b\u1ecbt k\u00edn b\u1eb1ng m\u1ed9t n\u00fat b\u1ecbt ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n

Tr\u01b0\u1edbc h\u1ebft, vi\u1ec7c th\u1ef1c hi\u1ec7n tr\u01b0\u1eddng h\u1ee3p \u0111\u1ea7u ti\u00ean, \u201cThi\u1ebft b\u1ecb d\u1eabn c\u00e1p c\u00f3 v\u00f2ng \u0111\u1ec7m k\u00edn tr\u00ean v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong>\u201c, \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh 1 b\u00ean d\u01b0\u1edbi:<\/p>\n\n\n\n

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

C\u1ea5u tr\u00fac c\u1ee7a lo\u1ea1i c\u1ed5ng k\u1ebft n\u1ed1i n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o ra bi\u1ebfn d\u1ea1ng c\u1ee7a v\u00f2ng \u0111\u1ec7m b\u1eb1ng c\u00e1ch \u00e9p v\u00f2ng \u0111\u1ec7m qua y\u1ebfu t\u1ed1 n\u00e9n \u1edf ph\u1ea7n \u0111\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb, nh\u1eb1m \u0111\u1ea3m b\u1ea3o v\u00f2ng \u0111\u1ec7m k\u1eb9p ch\u1eb7t v\u1ecf c\u00e1p m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5, v\u00e0 kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac b\u1ec1 m\u1eb7t ch\u1ed1ng ch\u00e1y n\u1ed5. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, ph\u01b0\u01a1ng ph\u00e1p ch\u1eb7n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng, ph\u1ea7n c\u00e1p th\u1eeba \u1edf b\u00ean ngo\u00e0i v\u00f2ng \u0111\u1ec7m ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t n\u00fat ch\u1eb7n b\u1eb1ng th\u00e9p\/b\u1ea3ng ch\u1eb7n, \u0111\u1ed9 d\u00e0y c\u1ee7a b\u1ea3ng ch\u1eb7n. Kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n 2mm<\/strong>, t\u1ea5m ch\u1eafn th\u00e9p n\u00ean \u0111\u01b0\u1ee3c \u00e9p b\u1edfi b\u1ed9 ph\u1eadn n\u00e9n, nh\u01b0 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 1.<\/p>\n\n\n\n

Trong tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai, \u201cL\u1ed7 xuy\u00ean qua trong v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong>\u201d\u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh 2 b\u00ean d\u01b0\u1edbi:<\/p>\n\n\n\n

Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u1ed5ng k\u1ebft n\u1ed1i tr\u00ean v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 l\u1ed7 xuy\u00ean qua cho ren ch\u1ed1ng ch\u00e1y n\u1ed5, c\u1ea7n \u0111\u01b0\u1ee3c b\u1ecbt k\u00edn b\u1eb1ng n\u00fat b\u1ecbt ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u00f9 h\u1ee3p. C\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c x\u00e1c \u0111\u1ecbnh lo\u1ea1i ren tr\u01b0\u1edbc ti\u00ean, ch\u1eb3ng h\u1ea1n nh\u01b0 ren NPT, ren M ho\u1eb7c c\u00e1c lo\u1ea1i ren kh\u00e1c \u0111\u01b0\u1ee3c ph\u00e9p, sau \u0111\u00f3 d\u1ef1a tr\u00ean lo\u1ea1i ren \u0111\u1ec3 l\u1ef1a ch\u1ecdn n\u00fat b\u1ecbt ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u00f9 h\u1ee3p. Ph\u01b0\u01a1ng ph\u00e1p b\u1ecbt n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua giao di\u1ec7n ren \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5, \u0111\u1ed3ng th\u1eddi ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau:<\/p>\n\n\n\n

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

B\u01b0\u1edbc r\u0103ng \u2265 0,7 mm, th\u00f4ng th\u01b0\u1eddng kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 2 mm;<\/p>\n\n\n\n

S\u1ed1 l\u01b0\u1ee3ng ren \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u2265 5 n\u1ea5c;<\/p>\n\n\n\n

\u0110\u1ed9 s\u00e2u ti\u1ebfp x\u00fac: \u22655mm khi th\u1ec3 t\u00edch c\u1ee7a thi\u1ebft b\u1ecb \u2264100cm\u00b3, ho\u1eb7c, \u22658mm khi th\u1ec3 t\u00edch c\u1ee7a thi\u1ebft b\u1ecb >100cm\u00b3;<\/p>\n\n\n\n

\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a s\u1ef1 ti\u1ebfp x\u00fac: M\u1ee9c \u0111\u1ed9 dung sai trung b\u00ecnh ho\u1eb7c ch\u00ednh x\u00e1c theo ti\u00eau chu\u1ea9n GB\/T 197 v\u00e0 GB\/T 2516, khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng 6H\/6g.<\/p>","protected":false},"excerpt":{"rendered":"

Explosion-proof plugging parts related knowledge In the fire and explosion hazardous areas of chemical enterprises, the use of explosion-proof electrical equipment is a common practice in order to effectively control the sparks generated by electrical equipment, to avoid the surrounding leakage of combustible gases into the electrical equipment inside the flash explosion accident. General requirements […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2114","post","type-post","status-publish","format-standard","hentry","category-explosion-proof-equipment"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Joe","author_link":"https:\/\/led.amasly.com\/vi\/author\/jacklin\/"},"uagb_comment_info":0,"uagb_excerpt":"Explosion-proof plugging parts related knowledge In the fire and explosion hazardous areas of chemical enterprises, the use of explosion-proof electrical equipment is a common practice in order to effectively control the sparks generated by electrical equipment, to avoid the surrounding leakage of combustible gases into the electrical equipment inside the flash explosion accident. General requirements…","_links":{"self":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/posts\/2114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/comments?post=2114"}],"version-history":[{"count":2,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/posts\/2114\/revisions"}],"predecessor-version":[{"id":2335,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/posts\/2114\/revisions\/2335"}],"wp:attachment":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/media?parent=2114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/categories?post=2114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/tags?post=2114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}