Txij li thaum nws cov khoom tsim tau ntau xyoo dhau los, stainless hlau tau dhau los ua cov khoom siv dav siv hauv ntiaj teb thiab nrov tshaj plaws. Chromium cov ntsiab lus muab nws cov kev tiv thaiv corrosion. Kev tiv thaiv tuaj yeem pom pom hauv kev txo cov kua qaub thiab tiv thaiv pitting tawm tsam hauv cov tshuaj chloride. Nws muaj qhov xav tau kev saib xyuas tsawg kawg thiab kev paub ci, ua rau nws yog cov khoom siv zoo tshaj plaws thiab zoo tshaj plaws rau cov kav hlau stainless. Stainless hlau yeeb nkab yog muaj nyob rau hauv ntau hom khoom, nrog rau cov kav dej welded thiab seamless kav. Cov muaj pes tsawg leeg tuaj yeem hloov pauv, tso cai rau nws siv rau ntau yam haujlwm. Stainless hlau yeeb nkab yog siv raws li niaj zaus los ntawm ntau lub tuam txhab lag luam. Nyob rau hauv no blog ncej, ntau hom stainless hlau kav nyob rau hauv cov nqe lus ntawm kev tsim thiab cov qauv sib txawv yuav tau hais. Ntxiv rau qhov ntawd, qhov kev tshaj tawm blog no tseem muaj cov ntawv thov sib txawv ntawm cov kav hlau stainless hauv kev lag luam sib txawv.

Txawv hom ntawmStainless hlau kavRaws li txoj kev tsim khoom

Cov txheej txheem ntawm kev tsim cov welded kav los ntawm nruam coil los yog phaj entails dov lub phaj los yog coil nyob rau hauv ib ncig seem nrog kev pab los ntawm ib tug roller lossis dabtsi yog khoov khoom. Cov khoom siv muab tub lim tuaj yeem siv rau hauv kev tsim khoom loj. Cov kav dej welded tsis tshua kim dua cov kav dej seamless, uas muaj tag nrho cov nqi tsim khoom siv ntau dua. Txawm hais tias cov txheej txheem no, xws li vuam txoj kev yog qhov tseem ceeb ntawm cov kav hlau stainless, cov ntsiab lus ntawm cov txheej txheem vuam no yuav tsis hais. Nws tuaj yeem yog lub ntsiab lus ntawm lwm qhov blog tshaj tawm ntawm peb li. Tau hais tias, welding txoj kev rau cov kav hlau stainless feem ntau tshwm sim raws li cov ntawv luv. Nws yog ib qho tseem ceeb kom paub txog cov ntawv luv luv no. Muaj ntau ntau cov txheej txheem welded, xws li:

• EFW- Hluav taws xob fusion vuam
• ERW- Hluav taws xob tsis kam vuam
• HFW-High zaus vuam
• SAW- Submerged arc vuam (kauv seam lossis ntev seam)

Kuj tseem muaj seamless hom stainless hlau kav hauv khw. Hauv kev nthuav dav ntxiv, tom qab tsim hluav taws xob ua haujlwm vuam, hlau yog dov thoob plaws nws qhov ntev. Seamless yeeb nkab ntawm txhua qhov ntev yuav raug tsim los ntawm cov hlau extrusion. ERW cov kav dej muaj cov pob qij txha uas tau welded raws lawv qhov hla ntu, hos cov kav dej seamless muaj cov pob qij txha uas khiav qhov ntev ntawm cov yeeb nkab. Tsis muaj vuam nyob rau hauv seamless kav txij li thaum tag nrho cov txheej txheem ntau lawm yog ua los ntawm cov khoom round billet. Nyob rau hauv ntau yam diameters, cov kav dej seamless tau ua tiav rau phab ntsa thickness thiab qhov ntev specifications. Txij li thaum tsis muaj seam nyob rau hauv lub cev ntawm cov yeeb nkab, cov kav dej no tau siv rau hauv cov kev siv hluav taws xob siab xws li roj thiab roj tsheb thauj mus los, kev lag luam, thiab kev ua kom zoo.

Stainless hlau yeeb nkab hom - Raws li cov qib Alloy

Cov tshuaj muaj pes tsawg leeg ntawm cov hlau tag nrho muaj kev cuam tshuam zoo rau cov khoom kawg ntawm cov khoom siv kho tshuab thiab cov chaw siv. Yog li, nws tsis yog qhov xav tsis thoob tias lawv tuaj yeem raug cais raws li lawv cov tshuaj muaj pes tsawg leeg. Txawm li cas los xij, thaum sim nrhiav cov qib ntawm cov yeeb nkab steel hlau tshwj xeeb, ntau hom npe tuaj yeem ntsib. Cov qauv siv feem ntau thaum xaiv cov kav hlau yog DIN (German), EN, thiab ASTM qib. Ib tug tuaj yeem sab laj ib lub rooj sib tham los nrhiav cov qib sib npaug. Cov lus hauv qab no muab cov ntsiab lus tseem ceeb ntawm cov qauv sib txawv no.

Table 1. Ib feem ntawm lub rooj siv cov khoom siv stainless hlau yeeb nkab

Ntau hom Raws li ASTM Specifications

Nws yog ib qho classic hais tias kev lag luam thiab cov qauv sib raug zoo. Kev tsim khoom thiab kev soj ntsuam cov txiaj ntsig tuaj yeem sib txawv vim qhov sib txawv ntawm ntau lub koom haum cov qauv rau ntau yam kev siv ntau yam. Tus neeg yuav khoom yuav tsum xub nkag siab cov ntsiab lus ntawm ntau yam kev lag luam tshwj xeeb rau lawv cov haujlwm, ua ntej ua qhov kev yuav khoom. Nws kuj yog ib qho tseeb hais rau cov kav hlau stainless.

ASTM yog ib lub npe luv rau American Society for Testing and Materials. ASTM International muab cov qauv kev pabcuam thiab cov khoom siv rau ntau yam kev lag luam. Lub koom haum no tau ua haujlwm tam sim no 12000+ tus qauv uas tau siv hauv kev lag luam thoob plaws ntiaj teb. Stainless hlau kav thiab fittings yog nyob rau hauv ntau tshaj 100 tus qauv. Tsis zoo li lwm lub cev, ASTM suav nrog yuav luag txhua hom kav dej. Piv txwv li, raws li American yeeb yam khoom, tag nrho cov spectrum ntawm cov yeeb nkab yog muab. Seamless carbon kav nrog cov kev qhia tshwj xeeb yog siv rau cov kev pabcuam kub. Cov qauv ASTM yog txhais los ntawm kev txiav txim siab ntawm cov tshuaj muaj pes tsawg leeg thiab cov txheej txheem tsim khoom tshwj xeeb cuam tshuam nrog cov khoom siv. Qee cov qauv khoom siv ASTM tau muab hauv qab no ua piv txwv.

• A106- Rau kev pabcuam kub
• A335- Seamless ferritic steel yeeb nkab (Rau qhov kub thiab txias)
• A333- Welded thiab seamless alloy steel kav (Rau qhov kub thiab txias)
• A312- Rau kev pabcuam corrosive thiab kev pabcuam kub, txias ua haujlwm welded, ncaj seam welded, thiab seamless kav yog siv

Ntau hom Stainless Hlau Yeeb Nkab Raws li cov chaw siv

Cov kav dej huv:Cov kav dej huv huv yog ua los ntawm cov hlau tsis muaj steel thiab siv rau hauv cov ntaub ntawv huv huv xws li cov ntaub ntawv rhiab heev. Hom yeeb nkab no tau muab qhov tseem ceeb tshaj plaws hauv kev lag luam kom ua tau zoo ntawm cov dej ntws. Cov yeeb nkab muaj qhov zoo tshaj plaws corrosion kuj thiab tsis xeb vim nws qhov yooj yim ntawm kev txij nkawm. Ntau yam kev txwv tsis pub dhau yog txiav txim siab raws li daim ntawv thov. Cov kav dej huv nrog cov qib ASTMA270 feem ntau siv.

Mechanical Pipes:Hallow Cheebtsam, bearing qhov chaw, thiab lub tog raj kheej qhov chaw yog feem ntau siv nyob rau hauv mechanical yeeb nkab daim ntaub ntawv. Cov cuab yeej siv tau yooj yim tswj tau rau ntau yam ntawm cov duab seem xws li cov duab plaub, square, thiab lwm cov duab uas ntxiv rau cov duab qub lossis cov duab qub. A554 thiab ASTMA 511 yog cov feem ntau siv qib hom hauv kev siv tshuab. Lawv muaj machinability zoo heev thiab siv nyob rau hauv daim ntaub ntawv xws li tsheb los yog ua liaj ua teb machinery.

Polished Pipes:Cov kav dej polished stainless hlau yog siv hauv tsev nyob ntawm qhov kev qhia tshwj xeeb. Cov kav dej polished pab txo qis kev hnav thiab tsim kua muag ntawm cov khoom ua haujlwm. Nws kuj pab txo qhov adhesion thiab paug ntawm ntau yam khoom siv. Electropolished nto muaj ntau yam kev siv. Stainless hlau polished kav tsis tas yuav muaj txheej txheej ntxiv. Polished kav dej muaj lub luag haujlwm tseem ceeb thiab tseem ceeb hauv kev zoo nkauj thiab kev siv vaj tsev.