To kev nkag siab cov xaim lub sijhawm
Hauv cov piping tshuab, lub sij hawm "sij hawm" yog hais txog phab ntsa tuab ntawm cov yeeb nkab steel. Ib lub sijhawm ua haujlwm siab dua txhais tau tias daim ntawv ntsa uas tuab tuab, uas cuam tshuam rau cov yeeb nkab lub siab- cov kabmob muaj peev xwm thiab qhov hnyav. Ntawm cov feem ntau cov sijhawm sib tham tau yog tus sch 40 thiab sch 40s. Txawm hais tias lawv yuav tshwm sim zoo sib xws, tshwj xeeb yog nyob rau hauv lub npe, lawv sawv cev cov qauv sib txawv thiab cov ntawv thov hauv kev lag luam.
Dab tsi yog sch 40
Sch 40, lossis teem sijhawm 40, yog kev tsim qauv siv hauv ASTM thiab ASME cov qauv. Nws siv rau ntau cov pa roj carbon hlau, tshwj xeeb yog cov kev ua raws li ASME B36.10M. Teem sijhawm 40 kav hlau muaj cov phab ntsa thickness, ua rau lawv xaiv qhov kev xaiv rau ntau yam dej, nrog rau cov roj pipelines. Lawv tau siv dav hauv kev tsim kho, kev lag luam kev lag luam vim lawv qhov sib npaug ntawm lub zog, qhov hnyav, thiab tus nqi.
Dab tsi yog sch 40s
SCH 40s hais txog tshwj xeeb los teem sijhawm 40 stainless hlau kav, feem ntau yog ua raws li Asme B36.19m cov qauv. Qhov "S" hauv 40s qhia tias stainless hlau tsis yog cov hlau hlau, thiab qhov sib txawv yog qhov tseem ceeb. Cov kav hlau stainless hlau nyob rau hauv sch 40s muaj me ntsis sib txawv phab ntsa thickness piv rau tus sch 40 kav hauv tus qauv steel hlau. Lawv tau tsim los ua kom tau raws li cov corrosion tsis kam ua kev lag luam xws li kev ua yeeb yam, thiab chaw ua noj ua haus, qhov twg ruaj khov yog qhov tseem ceeb.
Qhov sib txawv tseem ceeb ntawm Sch 40 thiab Sch 40s
Thawj qhov sib txawv ntawm Sch 40 thiab sch 40s dag hauv cov qauv cov qauv thiab phab ntsa tuab qhov ntev. Sch 40 feem ntau hais txog cov pa roj steel hlau, thaum lub sij hawm tus qauv 40s tshwj xeeb rau cov kav dej stainless hlau. Lwm qhov sib txawv yog tias Sch 40 Qhov ntev ua raws li asme B36.10M, thaum SCH 40S qhov ntev ua raws li Asme B36.19m. Qhov no txhais tau tias ob qho tib si tuaj yeem sib qhia tib lub npe kev tsim, lawv cov phab ntsa tuab yuav tsis zoo ib yam. Nkag siab cov kev sib txawv no yog qhov tseem ceeb rau kev ua kom tau qhov tseeb yog xaiv rau txhua qhov haujlwm.
| Yam | Sch 40 (Cov Hlau Hlau) | SCH 40s (Stainless Hlau) |
|---|---|---|
| Lub hom phiaj | ASME B36.10M | ASME B36.19M |
| Khoom | Cov Hlau Hlau | Stainless hlau |
| Phab Ntsa Thickness | Txhais rau cov pa hlau, sib txawv me ntsis | Txhais rau stainless hlau, tej zaum yuav txawv ntawm sch 40 |
| Corrosion Kuj | Ib nrab, yuav tsum tau txheej lossis hauv ob sab phlu | Siab, xam txog vim muaj stainless hlau |
| Cov Kev Siv Raug Raug | Dej, Roj, Roj Pipelines, Kev Tsim Kho | Tshuaj lom neeg ua yeeb yam, khoom noj, tubrogine, kws tshuaj |
Tag
Thaum Sch 40 thiab sch 40s yuav zoo ib yam li thawj zaug muag, lawv ua lub hom phiaj sib txawv hauv cov tshuab luam ntawv. SCH 40 feem ntau yog cov roj hlau hauv qab Asme B36.10M, thaum sch 40s yog stainless hlau nyob rau hauv ASME B36.19m. Qhov kev xaiv ntawm ob yog nyob ntawm daim ntawv thov cov cai rau lub zog, corrosion tsis kam, thiab ua raws li cov qauv. Rau cov phiaj xwm yuav tsum tau siv tus nqi - lub zog ua tau zoo, thaum ib puag ncig uas tau xav tau ntau dua rau corrosion, sch 40s stainless hlau kav yog cov kev daws teeb meem zoo tshaj plaws.
