Litšepe tse kopantsoeng tsa setso li bapala karolo e tloaelehileng tlhahisong ea litšepe, ebang ke tšepe e sa hloekang e sebelisoang lisebelisoa tsa bongaka kapa lijong tsa leoatleng, meloko efe kapa efe ea litšepe tse sebetsang hantle tse ntlafalitsoeng lilemong tse mashome a 'maloa tse fetileng bakeng sa indasteri ea likoloi, kapa litšepe tse kang aluminium le titanium. tse nang le karolelano e phahameng ea matla le boima le ho hanyetsa ho hoholo ha mafome ho etsa hore e tšoanelehe haholo bakeng sa lits'ebetso indastering ea lifofane, ho hloekisa oli le lik'hemik'hale.
Ho tšoana le ho li-alloy tse ling tsa tšepe ea khabone, haholo-holo li-alloy tse nang le khabone e itseng le manganese. Ho latela bongata ba likarolo tse kopanyang, tse ling tsa tsona li loketse hantle tlhahiso eali-flange, lisebelisoaleliphaephelibakeng tsa ho hloekisa lik'hemik'hale le oli. Kaofela li na le ntho e le 'ngoe e tšoanang: thepa e sebelisoang lits'ebetsong tsena e tlameha ho ba bonolo ho lekana ho mamella ho robeha ha brittle le stress corrosion petsoha (SCC).
Mekhatlo ea maemo a kang Mokhatlo oa Amerika oa Baenjiniere ba Manufacturing (ASME) le ASTM Intl. (eo pele e neng e tsejoa e le Mokhatlo oa Amerika oa Teko le Lisebelisoa) e fana ka tataiso ntlheng ena. Melao e 'meli e amanang ea indasteri-Boiler ea ASMEle Sejana sa Kgatelelo (BPVD) Karolo ya VIII, Karolo ya 1, le ASME B31.3, Diphaephe tsa Ts'ebetso - sebetsana le tshepe ya khabone (ntho efe kapa efe e nang le khabone ya 0.29% ho isa ho 0.54% le manganese ya 0.60% ho isa ho 1.65%, e nang le thepa e nang le tshepe). e tenyetsehang ka ho lekaneng bakeng sa tshebediso maemong a lehodimo a chesang, dibakeng tse futhumetseng le dithempereichara tse tlase ho -20 degrees Fahrenheit. Leha ho le jwalo, ditshitiso tsa moraorao mochesong o potolohileng di lebisitse tlhahlobong e haufi ya bongata le dikarolwana tsa dielemente tse fapaneng tsa microalloying tse sebediswang tlhahisong ya di-flange, di-fitting le liphaephe tsa tšepe tsa api.
Ho fihlela morao tjena, ASME kapa ASTM ha lia ka tsa hloka tlhahlobo ea tšusumetso ho netefatsa ho se sebetse hantle ha lihlahisoa tse ngata tsa tšepe ea khabone tse sebelisoang mochesong o ka tlase ho likhato tse 20 tsa Fahrenheit. Qeto ea ho qhelela ka thoko lihlahisoa tse itseng e ipapisitse le litšobotsi tsa nalane tsa thepa. Mohlala, ha mocheso o tlase oa moralo oa tšepe (MDMT) e le likhato tse 20 tsa Fahrenheit, ha e hloke liteko tsa tšusumetso ka lebaka la karolo ea eona ea setso lits'ebetsong tse joalo.
Nako ea poso: Mmesa-19-2023