1.Txoj kev ntawm Astm A928 thiab A790
Thawj qhov kev sib txawv ntawm lawv cov nyiaj nyob hauv lawv txoj kev ua kom pom tseeb:
{{0 {}}}} ** Tshaj tawm {{welded {2} {2} {2}- Cov kav dej kub ua rau cov hlau stainless Nws yog tsim los rau cov chaw pabcuam hauv cov chaw ib puag ncig thiab cov khoom siv ua kom nruj vuam thiab tshuaj xyuas cov kev cai lij choj.
{{0 {}}}}}}}}} ** Ib qho uas ua tsis tau zoo thiab welded duplex cov kav hlau Nws lub hom phiaj dav dav corrosion tsis kam, tshwj xeeb ntxhov siab corrosion cracking, thiab suav nrog cov kev tiv thaiv dav dav.
Qhov sib txawv tseem ceeb muaj xws li:
{{0-}} ຫັ ** "VUAM Txoj Kev **: A928 xav tau tub lim hlau; A790 VUAM YOG AUTOGENS (TSIS MUAJ HLAU).
{{0 {}}} ** SCHECTION **: A928 muaj tsib chav kawm ua kom meej, thiab tsis muaj kev cuam tshuam nrog cov khoom siv hluav taws xob (piv txwv li, hydrostatic, hluav taws xob).
{{0- ** Daim ntawv thov tsom **: A928 yog qhov zoo tagnrho rau high- corrosion sectors (tshuaj lom neeg, tawm tsam); A790 suits General Industrial Siv.
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2. Dab tsi yog Astm A928?
** ASTM A928 / A928M ** yog tus qauv rau @}}}}}}}} mi}} mi}}} pa roj hmab stainless hlau. Qhov tseem ceeb:
{{0-} ** Kev tsim khoom **: Cov kav dej yog ob npaug {{welded nrog kev daws analing thiab quenching kom khaws corrosion tsis kam.
-}} ** Cov Chav Tiv Thaiv **:
{{0 {{}} * Chav 1 *: Puv Rt nrog ob chav vuam.
{{0- * Chav 2 *: Ob Chav Vuam Tsis Muaj RT.
{{0- * Chav 5 *: MET RT (piv txwv, 300 hli rau 15m ntawm Weld).
{{{0 {{}} ** Cov ntawv thov **: Roj, Tshuaj thiab Desalination Nroj Tsuag Qhov uas tsis tshua yog qhov tseem ceeb.
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3.Qhov yog ASTM A790?
** ASTM A790 / A790M ** GUAGSCS ** Seamless ** Seamless ** Welded Duplex Pipes ** Rau Cov Kev Pab Cuam Corrosion. Cov ntsiab lus tseem ceeb:
{{0-}}}}}}}} Xaiv ** (Tsis Muaj Tus Muab Cov Khoom Siv Hluav Taws Xob), thiab cov kav dej dhau los ntawm kev kho kom sov sov (1020-1140 degree) ua raws li kev ua kom txias sai.
{{0 {}}}} ** Qhov ntev **: Npog NPS 1/8 "(10.7 hli) rau 30,24 hli txog 12.7 hli.
{{0- ** Kev sim Tensile, Floftening, hydrostatic, thiab tsis muaj kev sim hluav taws xob.
{{{0 {{{}} ** Daim ntaub ntawv thauj khoom, siv tshuaj lom neeg, tua hluav taws xob, pulp / cov ntawv lag luam, thiab cov qauv txheej txheem.
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4. Kev sib xyaw ntawm Astm A790
ASTM A790 kav siv cov qib qis dua zoo li ** UNS UNRS S31803, S32205, thiab s32760 **. Muaj pes tsawg leeg muaj pes tsawg leej muaj xws li:
{{0 {{}} E} ** chromium (CR) **: 18-30% (txhim kho corrosion tsis kam).
-}}}}}}}} Kuv) **: Txog li 5% (txhim kho pits Kuj).
{{0-}} ** Npib (NI) **: 3-10% (ruaj khov Austenic theem).
{{0 -}} **:4-0.32% (nce zog thiab corrosion tsis kam).
Piv Txwv: * uns s32205 (2205) * muaj 22-23% thiab 0,5-6.5% ni, thiab 0.14-0 .2% n.
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5. Astm A790 Unic S32760 Khoom
** UNR UNR UNS UNRY S32760 (Super Duplex) ** yog qib nyob hauv astm AntM A790 nrog cov khoom tshwj xeeb:
{{0 {}} ** Tshaj tawm ** ** **
{{0- ** Cr **: 24-26%, ** NI **: 6-8%, ** MO **: 3-4%.
{{0-}} ** 0.2-0.3%, ** w **: 0.5-1.0% (Tungsten Boosts Resistance).
{{0- Qhov tsis tshua muaj impurities (c tsawg dua lossis sib npaug rau 0.03%, s tsawg dua lossis sib npaug rau 0.01%).
{{0- ** Cov Khoom Siv Neeg Khoyam **:
{{0-}} ** Tensile lub zog **: Ntau dua lossis sib npaug lossis sib npaug lossis muaj zog dua lossis sib luag rau 524 MPA.
{{0 {{{}} ** E, ** ENGONIT **: 34%, ** Hardness **: Tsawg dua **: Tsawg dua lossis sib npaug rau 290 HBW.
{{{0 {{}} ** Daim ntaub ntawv thov, offshore platform, tshuaj lom neeg tshuaj ntsuab, thiab dej hiav txwv Weartination tshuab vim tias Chloride cov chloride zoo dua.
