Liphaephe tsa tšepe tse entsoeng ka motsoako o se nang seamless tse entsoeng kaASTM A335 P11leASTM A335 P22li sebelisoa haholo indastering ea petrochemical le ea tlhahiso ea motlakase bakeng sa thepa e nang le mocheso o phahameng, e hanelang khatello. Le hoja ka bobeli e le liphaephe tsa tšepe tsa motsoako oa chromium-molybdenum tse boletsoeng tlas'a maemo a ASTM A335, li bontša liphapang tse kholo maemong a itseng a ts'ebetso le ts'ebeliso. Ho utloisisa liphapang tsena ho bohlokoa bakeng sa moralo oa boenjiniere, khetho ea thepa le taolo ea boleng ba theko.

Sebopeho sa lik'hemik'hale ke ntlha ea bohlokoa e khethollang thepa ena e 'meli.Phaephe ea A335 P11Sebopeho sa lik'hemik'hale se na le likarolo tse ka bang 1.00 ho isa ho 1.50 tsa chromium le likarolo tse 0.44 ho isa ho 0.65 tsa molybdenum. Ka lehlakoreng le leng, ASTM A335 P22 e na le likarolo tse ngata tsa ho kopanya, ka chromium e ka bang likarolo tse 1.90 ho isa ho 2.60 le molybdenum e pakeng tsa likarolo tse 0.87 ho isa ho 1.13. Phapang ena ea metsoako e lebisa ka ho toba liphapang tse kholo ts'ebetsong ea tsona ea mocheso o phahameng. Sekhahla se phahameng sa chromium le molybdenum sa P22 se fana ka matla a phahameng a mocheso o phahameng, khanyetso ea oxidation le khanyetso ea ho thekesela.

Ha ho tluoa tabeng ea ho khetha thepa bakeng sa lits'ebetso tsa boenjiniere, maemo a ts'ebeliso ea thepa ena e 'meli a fapana haholo. P11 hangata e sebelisoa libakeng tsa mocheso o mahareng le khatello 'me hangata e fumanoa liphaepheng tsa ts'ebetso lifemeng tsa ho hloekisa oli, liphaepheng tsa superheater tse mocheso o tlase liphaepheng tsa motlakase, le litsamaisong tse ling tsa phapanyetsano ea mocheso. Mocheso oa eona oa moralo hangata o ka tlase ho 550°C. Ka lehlakoreng le leng, P22 e etselitsoe libaka tse hlokang mocheso o phahameng le khatello e phahameng 'me ke thepa e ratoang bakeng sa liphaephe tsa superheater tse mocheso o phahameng le ho futhumatsa hape liphaepheng tsa motlakase, hammoho le liphaephe tsa karabelo ea mocheso o phahameng le khatello e phahameng indastering ea petrochemical. E boloka thepa e ntle ea mechini le ho hanyetsa mafome mochesong oa moralo oa 580°C le ho feta.

Ha ho rekoa thepa ena e 'meli, tlhokomelo e khethehileng e lokela ho lefshoa ho liphapang litlhoko tsa eona tsa tekheniki. Mabapi le ho kheloha ha botenya ba lebota, ka bobeli li khomarela mefuta e tšoanang ea mamello e boletsoeng keTekanyetso ea ASTM A335Ha ba reka, bafepedi ba lokela ho kopuoa ho fana ka litlaleho tse qaqileng tsa tlhahlobo ea litekanyo ho netefatsa hore ho lekana ha botenya ba lebota ho fihlela litlhoko tsa liphaephe tsa khatello. Mabapi le taolo ea metsoako ea lik'hemik'hale, basebetsi ba rekang ba tlameha ho hlahloba ka hloko litifikeiti tsa thepa ho netefatsa hore litaba tsa likarolo tsa bohlokoa tsa ho kopanya tse kang chromium le molybdenum li fihlela litlhoko tse tloaelehileng. Habohlokoa ka ho khetheha, tlhoko ea litaba tsa molybdenum bakeng sa P22 e phahame haholo ho feta ea P11, e leng ea bohlokoa bakeng sa ho netefatsa ts'ebetso ea mocheso o phahameng. Ho feta moo, ha ho rekoa, kalafo e nepahetseng ea mocheso e lokela ho khethoa ho latela tikoloho ea ts'ebeliso. Ho lokisa le ho futhumatsa hangata ke khetho e ntle ka ho fetisisa bakeng sa ho netefatsa ts'ebetso ea thepa.

Leha ASTM A335 P11 le P22 e le tsa lelapa le le leng la tšepe ea alloy ea chromium-molybdenum, P22 e fana ka ts'ebetso e phahameng ea mocheso o phahameng ka lebaka la dikahare tsa eona tse phahameng tsa alloy, tse tlang le litšenyehelo tse phahameng tsa theko. Lintlha tse kang mocheso oa ts'ebetso, liparamente tsa khatello, litšobotsi tsa mecha ea phatlalatso, le tekanyetso ea litšenyehelo li tlameha ho nahanoa ka botlalo nakong ea moralo oa boenjiniere le khetho ea thepa. Nakong ea ts'ebetso ea theko, litekanyetso tsa bohlokoa tsa boleng tse kang sebopeho sa lik'hemik'hale, thepa ea mechini, le mamello ea litekanyo li tlameha ho laoloa ka tieo ho netefatsa hore thepa e fihlela litlhoko tsa moralo le maemo a polokeho. Khetho e nepahetseng ea thepa le taolo e tiileng ea boleng ba theko li bohlokoa bakeng sa ho netefatsa ts'ebetso e sireletsehileng ea nako e telele ea litsamaiso tsa liphaephe tsa mocheso o phahameng.