Zvishandiso zvechinyakare zvine basa guru mukugadzirwa kwesimbi, ingave simbi isingatsvedzeri inoshandiswa mumidziyo yekurapa kana yegungwa, chero zvizvarwa zvesimbi dzinoshanda zvakanaka dzakagadzirwa mumakumi emakore apfuura muindasitiri yemotokari, kana simbi dzakadai sealuminium netitanium. dzine simba guru pakurema uye dzinodzivirira ngura zvakanyanya zvinoita kuti zvive zvakakodzera kushandiswa muindasitiri yendege, yekuchenesa mafuta uye yemakemikari.
Izvi zvinoshandawo kune mamwe ma alloys esimbi yekabhoni, kunyanya ma alloys ane kabhoni uye manganese. Zvichienderana nehuwandu hwezvinhu zvinobatanidza, zvimwe zvacho zvakakodzera kugadzirwa kweflanges, zvigadzikouyemapaipimumakambani ekuchenesa mafuta nemakemikari. Zvese zvine chinhu chimwe chete chakafanana: zvinhu zvinoshandiswa mukushandiswa uku zvinofanirwa kunge zvakapfava zvakakwana kuti zvigone kutsungirira kupwanyika kwebrittle fracture uye stress corrosion cracking (SCC).
Masangano emitemo akadai seAmerican Society of Manufacturing Engineers (ASME) neASTM Intl. (yaimbozivikanwa seAmerican Society for Testing and Materials) anopa gwara panyaya iyi. Makodhi maviri eindasitiri ane hukama-ASME Bhoirauye Mudziyo weKumanikidza (BPVD) Chikamu VIII, Chikamu 1, uye ASME B31.3, Process Piping - inotarisa simbi yekabhoni (chero chinhu chine 0.29% kusvika 0.54% kabhoni uye 0.60% kusvika 1.65% manganese, zvinhu zvine iron). inochinjika zvakakwana kuti ishandiswe munzvimbo dzinopisa, munzvimbo dzine mamiriro ekunze anodziya uye tembiricha dzakaderera se -20 degrees Fahrenheit. Zvisinei, zvipingamupinyi zvazvino patembiricha yekunze zvakaita kuti pave nekuongororwa kwakanyatsojeka kwehuwandu uye huwandu hwezvinhu zvakasiyana-siyana zve microalloying zvinoshandiswa mukugadzira ma flanges, fittings uye mapaipi esimbi eApi.
Kusvika munguva pfupi yapfuura, ASME kana ASTM zvaisada kuyedzwa kwemhedzisiro yechinhu kuti zvisimbiswe kuti zvinhu zvakawanda zvesimbi yekabhoni zvinoshandiswa patembiricha yakaderera kusvika -20 degrees Fahrenheit. Sarudzo yekusabvisa zvimwe zvigadzirwa yakavakirwa pahunhu hwekare hwechinhu chacho. Semuenzaniso, kana tembiricha yekugadzirwa kwesimbi iri pasi pe -20 degrees Fahrenheit, hazvibatanidzwi pakuyedzwa kwemhedzisiro yechinhu nekuda kwebasa rayo rekare mukushandiswa kwakadaro.
Nguva yekutumira: Kubvumbi-19-2023