1. ** Dab tsi yog ittm 928 / uns unic s31803 khoom? **
ASTM A928 yog cov qauv kev cai rau ** Ferritic / Austenitic / Duplex) stainless hlau yeeb nkab steel hlau ** * Ntau welded nrog ntxiv ntawm muab tub lim hlau *. D31803 yog qhov tshwj xeeb alloy tsim (feem ntau hu ua ** Duplex 2205 **). Cov ntaub ntawv no muaj lub zog siab, zoo heev corrosion tsis kam (tshwj xeeb yog cov tshuaj pleev chloride ntxhov siab corrosion), thiab Weldability zoo. Nws yog feem ntau siv rau welded yeeb nkab hauv kev ua kom haum ib puag ncig zoo li cov tshuaj lom neeg, roj & roj av.
2. ** Dab tsi yog Astm A890 khoom siv? **
ASTM A890 is a standard specification for **Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic)** for general application. Nws npog cov cam (tsis muaj wrought) duplex stainless hlau alloys npaj rau corrosion {}} resistant kev pab. Cov qib kawm muaj xws li 1b, 2a, 3a, 5a, 6a & aws, cd3mn / 1b, cd3mwcun / 5a). Cov cuab yeej no yog siv rau li qub, twj, fittings, thiab lwm yam uas cov corrosion tsis kam ntawm cov hlau stainless.
3. ** Dab tsi yog qhov sib txawv ntawm Astm A778 thiab ASTM A312? **
* ** ASTM A778: ** Relded ** Welded Austenitic Stainless Hlau Tub Khoom ** (cov raj) npaj rau qhov tsis tshua muaj corrosion thiab cua sov {1} {tsis kam. Cov hlab yog welded thiab siv nyob rau hauv lub - Welded mob tsis muaj qhov kev pab cuam tshav kub (piv txwv li, cov ntawv thov cua sov).
* ** AVTM A312: ** Daim npog ** ncaj {{{txias welded steel hlau **}} kub thiab cov kev pab cuam corrosive. Cov kav dej ua raws li A312 * yuav tsum * yog cov khoom siv ua kom ntseeg tau tias muaj kev ua kom zoo dua thiab kho tshuab. Nws yog thawj tus qauv rau General - hom phiaj stainless hlau txheej txheem piping.
4. ** Dab tsi yog cov khoom tsis sib xws? **
Tus ** Kev Ua Ke Ua Haujlwm (Unify Unified System (Uncution) ** yog * tsis yog cov qauv txheem nws tus kheej *. Nws yog ib txoj kev sib koom ua ke ** Tus lej cim kos npe ** Rau cov hlau thiab alloys, tsim ua ke los ntawm SAE International thiab Astm International. Nws lub hom phiaj yog muab cov txheej txheem, hla}}}}} hais txog cov ntawv sau ua ntej (piv txwv li alloys alloys) ua raws li tsib tus lej. Cov lej tsis muaj kev cuam tshuam ntawm alloys los ntawm ib txwm muaj cov lej sib txawv (zoo li AISI, SATM, ASME, CAT SPEC
5. ** Dab tsi yog tsis tau nyob rau hauv piping? **
Nyob rau hauv cov ntsiab lus ntawm piping, ** Tsis muaj cov lej sau tseg) ** Piv txwv li:
* "AVTM A312 TP.3L" Qhia tawm cov yeeb nkab txheem thiab qib kawm, thaum "tsis tau pom cov tshuaj lom neeg txo li 304L stainless hlau qib.
* "A928 Qib S31803" Siv tus lej tsis muaj cai ncaj qha rau qib kawm rau Duplex 2205 yeeb nkab.
Tej yam tsis muaj tseeb muab txoj kev qhia thoob ntiaj teb, muaj kev sib tw, thiab li qub, ua kom muaj kev siv tshuaj lom neeg siv thoob plaws cov khoom siv engineering.
