Teem caij 40 txhais li cas?
Teem caij 40, sau raws li Sch 40, yog phab ntsa -thickness series designation rau steel yeeb nkab txhais hauv ASME B36.10. Tus lej teem sijhawm tsis yog ntsuas ncaj qha hauv millimeters; nws yog ib tug series index tau los ntawm cov qauv tsim nyob rau hauv uas lub sij hawm tus naj npawb ntawm approximates 1000 lub sij hawm tus tsim siab muab faib los ntawm lub tso cai kev nyuaj siab. Raws li lub sijhawm teem sijhawm nce, phab ntsa thickness nce thiab cov yeeb nkab tuaj yeem nqa siab dua rau tib lub cheeb sab nraud. Teem sijhawm 40 yog cov khoom siv dav tshaj plaws vim nws sib npaug lub zog, qhov hnyav thiab tus nqi rau kev pabcuam kev lag luam.
Sch 40 Phab Ntsa Thickness los ntawm NPS
Rau txhua qhov nominal yeeb nkab loj, Sch 40 muaj cov phab ntsa ruaj khov. Common values yog:
| NPS | Sab nraud txoj kab uas hla (mm) | Sch 40 Phab ntsa (mm) |
|---|---|---|
| 1/2 | 21.3 | 2.77 |
| 3/4 | 26.7 | 2.87 |
| 1 | 33.4 | 3.38 |
| 1-1/2 | 48.3 | 3.68 |
| 2 | 60.3 | 3.91 |
| 3 | 88.9 | 5.49 |
| 4 | 114.3 | 6.02 |
| 6 | 168.3 | 7.11 |
| 8 | 219.1 | 8.18 |
| 10 | 273.0 | 9.27 |
| 12 | 323.8 | 10.31 |
Seamless yeeb nkab nyob rau hauv Sch 40 yog tsim los ntawm kub tho thiab dov, ces qhov luaj li cas rau lub caij nyoog sab nraud txoj kab uas hla thiab phab ntsa thickness ntawm lub rooj no.
Sch 40 vs Sch 40 S
Rau cov yeeb nkab steel hlau, cov phab ntsa series tau txiav txim siab nyob rau hauv ASME B36.19, qhov "S" cov lus qhia qhov txawv ntawm cov sij hawm stainless. Rau ntau qhov ntau thiab tsawg mus txog NPS 12, Sch 40S sib npaug Sch 40 hauv phab ntsa tuab, tab sis ntawm qhov loj dua qhov ob series diverge. Qhov no txhais tau hais tias carbon steel Sch 40 yeeb nkab thiab stainless hlau Sch 40S yeeb nkab ntawm tib NPS tej zaum yuav txawv phab ntsa thicknesses ntawm loj diameters, yog li qhov tseeb series yuav tsum tau teev nyob rau hauv qhov kev txiav txim.
Vim li cas Sch 40 thiaj li siv dav
Lub peev xwm muaj peev xwm: cov phab ntsa tuab ntawm Sch 40 nqa qhov siab sab hauv ntau dua li Sch 10 lossis Sch 20 rau tib txoj kab uas hla.
Mechanical zog: lub phab ntsa hnyav tiv thaiv bending loads, kev co thiab lwm yam cuam tshuam zoo dua nyias - phab ntsa yeeb nkab.
Threading: Sch 40 yog qhov tsawg kawg nkaus phab ntsa feem ntau pom zoo rau kev txiav NPT threads yam tsis muaj zog ntawm cov yeeb nkab kawg.
Muaj: Sch 40 seamless yeeb nkab yog stocked thoob ntiaj teb nyob rau hauv cov pa roj carbon steel thiab stainless qib, uas shortens project lead sij hawm.
Hom Daim Ntawv Thov Scenarios
Cov txheej txheem piping hauv refineries thiab tshuaj nroj tsuag rau dej, chav dej thiab cov kua dej dav dav.
Hluav taws kub-kev tiv thaiv thiab lub tshuab nqus dej, qhov twg phab ntsa yuav tsum muaj sia nyob tuav thiab ntsuas hydrostatic.
Compressed cua thiab cov khoom siv hluav taws xob hauv cov nroj tsuag.
Kev siv cov qauv thiab kev siv tshuab qhov twg cov yeeb nkab kuj nqa cov kua dej.
Xaiv thiab Ordering Points
Paub meej tias phab ntsa thickness tus nqi rau qhov tseeb NPS, vim tib lub sijhawm teem sijhawm muab cov millimeter sib txawv ntawm qhov sib txawv.
Qhia cov qauv khoom (piv txwv li, ASTM A106 lossis A53 rau cov pa roj carbon steel) ua ke nrog lub sijhawm, txij li lub sijhawm ib leeg tsis txhais cov khoom siv.
Rau cov yeeb nkab stainless, qhia 40S ib ASME B36.19 yog li cov koob raug siv ntawm cov kab loj loj.
Xyuas cov chav kawm kam rau ua: tus qauv thiab tshwj xeeb kam rau ua nyob rau sab nraud txoj kab uas hla thiab phab ntsa thickness.
FAQ
Q1: Puas yog Sch 40 txhais tau tias yog 40 hli phab ntsa thickness?
A: Tsis yog. Sch 40 yog cov npe series, thiab qhov tseeb phab ntsa thickness nyob ntawm cov yeeb nkab loj, los ntawm 2.77 hli ntawm NPS 1/2 txog 10.31 hli ntawm NPS 12.
Q2: Qhov txawv ntawm Sch 40 thiab Sch 40S yog dab tsi?
A: Sch 40 yog cov carbon steel series hauv ASME B36.10; Sch 40S yog stainless hlau series hauv ASME B36.19. Lawv sib npaug ntawm ntau qhov ntau thiab tsawg tab sis sib txawv ntawm NPS loj dua.
Q3: Sch 40 yeeb nkab puas tuaj yeem threaded?
A: Yog, Sch 40 yog cov phab ntsa yam tsawg kawg nkaus rau threading; thinner phab ntsa xws li Sch 10 tsis tso cov khoom txaus rau cov xov muaj zog.
Q4: Kuv yuav xaiv li cas ntawm Sch 40 thiab Sch 80?
A: Xaiv Sch 80 thaum tsim lub siab los yog sab nraud load yuav tsum muaj phab ntsa tuab; txwv tsis pub Sch 40 muab qhov hnyav dua thiab tus nqi rau tib txoj kab uas hla.
Q5: Puas yog lub sijhawm 40 muaj nyob rau hauv daim ntawv seamless?
A: Yog, Sch 40 seamless yeeb nkab yog tsim nyob rau hauv carbon steel thiab stainless qib los ntawm NPS 1/8 mus rau NPS 24 los yog loj, nyob ntawm seb lub zeb.
Q6: Tus lej teem caij yuav suav li cas?
A: Lub sijhawm teem sijhawm kwv yees li 1000 npaug ntawm qhov tsim siab muab faib los ntawm kev tso cai rau kev ntxhov siab, uas yog vim li cas cov lej siab dua txhais tau tias cov phab ntsa tuab.