Zosakaniza zachikhalidwe zimagwira ntchito yokhazikika pakupanga zitsulo, kaya ndi zitsulo zosapanga dzimbiri zomwe zimagwiritsidwa ntchito pazida zamankhwala kapena nsomba zam'madzi, mibadwo yonse yazitsulo zogwira ntchito kwambiri zomwe zidapangidwa zaka makumi angapo zapitazi pamakampani opanga magalimoto, kapena zitsulo monga aluminiyamu ndi titaniyamu.zomwe zimakhala ndi mphamvu zolemera kwambiri komanso kukana kwa dzimbiri zimapangitsa kuti zikhale zoyenera kwambiri kuti zigwiritsidwe ntchito muzamlengalenga, zoyenga mafuta ndi mafakitale a mankhwala.
Zomwezo zimagwiranso ntchito pazitsulo zina za carbon steel, makamaka ma alloys okhala ndi carbon ndi manganese.Kutengera kuchuluka kwa zinthu alloying, zina mwazo ndi bwino kuti kupangaflanges, zopangirandimapaipiOnse ali ndi chinthu chimodzi chofanana: zida zomwe zimagwiritsidwa ntchito pazifukwa izi ziyenera kukhala ductile mokwanira kuti zipirire brittle fracture ndi stress corrosion cracking (SCC).
Mabungwe amiyezo monga American Society of Manufacturing Engineers (ASME) ndi ASTM Intl.(omwe kale ankadziwika kuti American Society for Testing and Materials) amapereka malangizo pankhaniyi.Mitundu iwiri yokhudzana ndi makampani-ASME Boilerndi Pressure Vessel (BPVD) Gawo VIII, Gawo 1, ndi ASME B31.3, Process Piping - adilesi ya carbon steel (chilichonse chomwe chili ndi 0.29% mpaka 0.54% carbon ndi 0.60% mpaka 1.65% manganese, chitsulo chokhala ndi zipangizo).kusinthasintha kokwanira kugwiritsidwa ntchito kumadera otentha, madera otentha komanso kutentha kotsika mpaka -20 degrees Fahrenheit.Komabe, zolepheretsa zaposachedwa pa kutentha kozungulira kwachititsa kuti tiwunikenso mozama za kuchuluka ndi kuchuluka kwa zinthu zosiyanasiyana zama microalloying zomwe zimagwiritsidwa ntchito popanga ma flanges, zolumikizira ndi. mapaipi achitsulo api.
Mpaka posachedwapa, ASME kapena ASTM sanafunikire kuyesa mphamvu kuti atsimikizire kuti zinthu zambiri zazitsulo za carbon zitsulo zimagwiritsidwa ntchito pa kutentha kotsika mpaka -20 digiri Fahrenheit.Chisankho chochotsa zinthu zina chimachokera ku mbiri yakale ya zinthuzo.Mwachitsanzo, kutentha kocheperako pakupanga zitsulo (MDMT) kukakhala -20 digiri Fahrenheit, sikumayesedwa pakuyesa zotsatira zake chifukwa cha chikhalidwe chake pamapulogalamu otere.
Nthawi yotumiza: Apr-19-2023