ASTM A312 TP309S Stainless hlau welded yeeb nkab

Nyob ntawm qhov ntev thiab phab ntsa thickness, welded kav yog tsim los ntawm ntau txoj kev: hluav taws xob tsis kam vuam (ERW), fusion vuam (EFW), thiab ob chav submerged arc vuam (DSAW). Hauv ERW thiab EFW cov txheej txheem tsim khoom, welded kav yog tsim los ntawm kub lossis txias dov daim ntawv thiab vuam cov seams. Txhawm rau kom cov welded yeeb nkab sab nrauv (OD) du thiab zoo ib yam, cov cuab yeej txiav hu ua cov hniav txiav yog siv los tshem tawm cov vuam burrs. Trimming kuj tseem tuaj yeem ua los ntawm sab hauv (ID) weld burrs. Kev kho cua sov thaum kawg ntawm cov txheej txheem tsim khoom tuaj yeem ua rau thaj tsam welded ntawm cov yeeb nkab steel tsis tshua pom. Vim lub xub ntiag ntawm cov vuam seam, welded kav dej muaj zog ua hauj lwm qis dua seamless kav raws li ASME cov cai. Feem ntau, cov kav dej welded muaj nruj dua qhov ntev dua li cov kav dej seamless thiab tsis tshua kim los tsim hauv tib qhov ntau.

ERW yog yeeb nkab, uas yog, hluav taws xob tsis kam welded yeeb nkab. Daim ntawv yog dov rau hauv cov yeeb nkab thiab tom qab ntawd welded siv cov txheej txheem hluav taws xob tiv thaiv vuam. Feem ntau siv rau qhov loj diameters. (Cov txheej txheem pheej yig tshaj) ERW yeeb nkab yog hais txog hluav taws xob tsis kam welded yeeb nkab. ERW steel yeeb nkab yog siv rau ntau yam engineering lub hom phiaj, fencing, scaffolding, kab yeeb nkab, thiab lwm yam. ERW steel yeeb nkab yog muaj nyob rau hauv ntau yam zoo, phab ntsa thicknesses, thiab tiav cov yeeb nkab diameters.
Alloy 309 thiab Alloy 309S yog austenitic chromium-nickel stainless hlau uas feem ntau siv rau hauv cov ntawv thov kub. Vim muaj cov ntsiab lus siab chromium thiab npib tsib xee, alloys 309 thiab 309S yog cov corrosion resistant, muaj oxidation zoo heev thiab kub ua hauj, thaum muaj zog zoo ntawm chav tsev kub thiab siab kub. Qhov sib txawv tseem ceeb ntawm 309 thiab 309S yog cov ntsiab lus carbon. Lub 309S alloy muaj cov pa roj carbon tsawg dua los txo cov nag lossis daus ntawm carbide thiab txhim kho weldability.
Alloy 309 (UNS S30900) yog austenitic stainless hlau tsim rau kev siv kub-resistant corrosion. Nyob rau hauv tsis-cycling tej yam kev mob, lub alloy resists oxidation rau 1900 degree F (1038 degree). Nquag thermal cycling txo oxidation tsis kam mus txog 1850 degree F (1010 degree ).
Vim nws cov ntsiab lus chromium siab thiab cov ntsiab lus tsis tshua muaj npib tsib xee, 309 alloy tuaj yeem siv rau hauv qhov chaw qaub ncaug txog 1832 degree F (1000 degree). Txij li thaum cov hlau tsis tshua muaj kev cuam tshuam rau cov pa roj carbon monoxide, nws tsis pom zoo siv rau hauv qhov chaw carburizing heev. 309 alloy tuaj yeem siv rau hauv me me oxidation, nitriding, bonding, thiab thermal cycling daim ntaub ntawv, tab sis lub siab tshaj plaws kev pab cuam kub yuav tsum tau txo.

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