- Cov khoom xaiv ntawmpipeline rhaubncaj qha cuam tshuam rau lawv lub neej kev pabcuam, kev ua kom sov, thiab kev nyab xeeb, thiab yuav tsum tau txiav txim siab raws li qhov tseem ceeb xws li cov yam ntxwv ntawm kev ua haujlwm nruab nrab, kub, siab, thiab corrosiveness.
1 、 Cov khoom tseem ceeb cuam tshuam rau kev xaiv cov khoom siv
Cov yam ntxwv ntawm kev ua haujlwm nruab nrab:
Txawm hais tias qhov nruab nrab yog corrosive (xws li cov kua qaub-puag, dej hiav txwv, dej khib nyiab, thiab lwm yam);
Seb qhov nruab nrab muaj impurities (xws li hais, sediment, thiab lwm yam., uas yuav ua rau hnav);
Txawm hais tias qhov nruab nrab yog qib zaub mov lossis qib tshuaj (yuav tsum ua tau raws li qhov xav tau ntawm kev huv thiab tsis muaj nag lossis daus).
Ua haujlwm kub:
Kev kub siab ua haujlwm ntawm cov khoom sib txawv sib txawv ntawm qhov kub thiab txias (≤ 100 ℃), nruab nrab kub (100-600 ℃), thiab kub siab (> 600 ℃).
ua hauj lwm siab:
Tsis tshua muaj siab (≤ 1MPa), nruab nrab siab (1-10MPa), siab siab (> 10MPa), cov khoom yuav tsum ua tau raws li cov neeg kho tshuab lub zog yuav tsum tau nyob rau hauv lub siab sib xws.
2 、 Cov khoom siv dav dav thiab cov xwm txheej siv tau
Stainless hlau (feem ntau yog siv)
Muab faib ua qauv xws li 304, 316, 310S, thiab lwm yam., corrosion kuj thiab kub kub kuj yog kho nyob rau hauv ib theem zuj zus:
304 stainless hlau:resistant rau kev xeb (xws li dej, huab cua, tsis muaj zog acid thiab alkali), tus nqi nruab nrab, haum rau cov cua sov kais dej, dej zoo tib yam, compressed cua, thiab lwm yam., ua hauj lwm kub ≤ 600 ℃, siab ≤ 10MPa.
316 stainless hlau:muaj molybdenum caij, nrog corrosion kuj zoo dua 304, tuaj yeem tiv taus dej hiav txwv, tsis tshua muaj ntsev tov, dilute sulfuric acid, thiab lwm yam., haum rau marine ib puag ncig, tshuaj lom neeg corrosive media, kub ≤ 800 ℃.
310S stainless hlau:Kub kub tsis kam (≤ 1200 ℃), muaj zog oxidation tsis kam, haum rau cua sov xwm txheej xws li kub-kub flue roj thiab molten ntsev, tab sis me ntsis inferior corrosion kuj mus rau 316.
Cov pa roj carbon steel
Tus nqi qis, lub zog muaj zog (tuaj yeem tiv taus siab> 20MPa), tab sis nws tuaj yeem xeb (yuav tsum muaj cov xim pleev xim los yog galvanizing kev tiv thaiv), tsuas yog tsim rau cov tsis muaj corrosive, chav tsev kub / nruab nrab kub (≤ 300 ℃) xov xwm, xws li cua sov cav roj thiab cov roj gases zoo tib yam.
3 、 Xaiv cov kauj ruam thiab cov ntaub ntawv xa mus
1. Qhia meej cov ntsiab lus tseem ceeb:
Ua ntej txiav txim siab qhov nruab nrab (corrosiveness / cleanliness), kub (chav tsev kub / siab kub), siab (siab siab / qis siab?), thiab tom qab ntawd phim cov khoom siv.
2. Cov piv txwv zoo li scenario:
Cua sov kais dej / dej ib txwm muaj: 304 stainless hlau (sib npaug nqi thiab corrosion kuj);
Cua sov dej hiav txwv / dej ntsev tsawg: 316 stainless hlau (resistant chloride ion corrosion);
Cua sov concentrated hydrochloric acid / muaj zog alkali tov: titanium alloy los yog Hastelloy alloy (nrog muaj zog corrosion kuj yuav tsum);
Khoom noj khoom haus qib dej kub cua sov: 316 stainless hlau (huv + corrosion-resistant);
Kub kub flue roj cua sov (800 ℃): 310S stainless hlau (tiv taus kub oxidation)
Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thovtiv tauj peb!
Post lub sij hawm: Aug-18-2025
