Cia peb pib nrog qhov tseeb:
Austenitic stainless hlau kav yog feem ntau siv nyob rau hauv ntau yam corrosive ib puag ncig. Txawm li cas los xij, yog tias koj ua tib zoo saib, koj yuav pom tias hauv cov ntaub ntawv tsim qauv ntawm qee chav nyob, ntev npaum li DN≤40, txhua yam khoom siv tau txais yuav. Nyob rau hauv cov ntaub ntawv tsim ntawm lwm cov chav nyob, stainless hlau kav, txawm tias me me npaum li cas ntawm lub caliber, lawv kuj siv lub pob tw-welded yeeb nkab fittings es tsis txhob raj fittings.
Raws li cov lus hais mus: txhawm rau txhawm rau ua kom cov vuam zoo ntawm cov kav dej me me thiab tsis txhob vuam nkag thaum lub sij hawm vuam loj tam sim no, lub qhov (socket) txuas feem ntau yog siv los ntawm kev sib txuas ntawm pob tw. Yog li, vim li cas lwm cov chav nyob ntawm stainless hlau me me caliber kav tsis dais intubation daim? Qhov no suav nrog qhov teeb meem: crevice corrosion.
Wb tham txog dab tsi yog crevice corrosion?
Thaum muaj qhov sib txawv (feem ntau 0.025-0.1mm) nyob rau saum npoo ntawm cov khoom siv hlau vim yog lub cev txawv teb chaws lossis cov qauv tsim, nws yog ib qho nyuaj rau kev tsiv mus rau qhov nruab nrab corrosive hauv qhov sib txawv, uas ua rau cov hlau corrosion, hu ua gap corrosion. Crevice corrosion feem ntau dhau los ua qhov inducement ntawm lwm yam corrosion (xws li pitting corrosion, kev nyuaj siab corrosion), yog li qhov project siv zog kom tsis txhob muaj qhov tshwm sim ntawm crevice corrosion. Lub hav zoov ntawm cov kab nrib pleb yuav tsum tau zam nyob rau hauv kev tsim ntawm cov kav raj xa dej rau qhov nruab nrab uas yuav ua rau tawg corrosion.
Stainless hlau 304 flange
Nws yog vim tias muaj qhov sib txawv ntawm qhov sib txuas, yog li qee chav nyob kom tsis txhob muaj qhov sib txawv corrosion, rau lub neej ntawm corrosion ntawm stainless hlau kav, me me caliber pipeline feem ntau siv pob tw vuam txuas, vuam txheej txheem tswj kom zoo, zam. kev siv intubation.
304 yog ib qho universal stainless hlau, nws yog dav siv nyob rau hauv zus tau tej cov khoom thiab qhov chaw uas yuav tsum tau zoo kev ua tau zoo (corrosion kuj thiab formability).
304 stainless hlau yog ib hom ntawm stainless hlau ua raws li ASTM cov qauv hauv Tebchaws Meskas. 304 yog sib npaug rau Tuam Tshoj 0Cr19Ni9 (0Cr18Ni9) stainless hlau. 304 muaj 19% chromium thiab 9% npib tsib xee.
304 yog siv dav siv stainless hlau, kub resistant hlau. Siv rau hauv cov khoom siv khoom noj khoom haus, khoom siv tshuaj lom neeg xitong, nuclear zog, thiab lwm yam.
304 stainless hlau taub qab vuam flangeyog ib tug dav siv chromium - npib tsib xee stainless hlau, nrog zoo corrosion kuj, tshav kub tsis kam, tsis kub kub lub zog thiab txhua yam khoom. Corrosion tsis kam nyob rau hauv cov huab cua, yog tias nws yog ib qho chaw ua lag luam lossis thaj chaw muaj kuab heev, nws yuav tsum tau muab ntxuav kom huv si kom tsis txhob muaj corrosion. Haum rau kev ua zaub mov, khaws cia thiab kev thauj mus los. Nws muaj zoo machinability thiab weldability. Phaj kub exchanger, hauv qab, cov khoom siv hauv tsev, cov khoom siv hauv tsev, tshuaj, khoom noj khoom haus, thiab lwm yam.