Ubwino wogwiritsa ntchito mapaipi a Selder Astm A252
Chimodzi mwazinthu zazikulu zakugwiritsa ntchito anyezi a252 owoneka bwino achitsulo ndi mphamvu zake zazikulu komanso zolimba. Mapaipi awa amatha kupirira zovuta zapamwamba komanso katundu wolemera, kuwapanga kukhala abwino pakupatsira mafuta ndi mafuta, mayendedwe amtsinje ndi mapangidwe a makina. Njira yowuzira yowuzira yophika yopanga imatsimikizira kuti ndi yolimba komanso yolumikizirana, kulola chitolirocho kuti chikapiritse matumbo okhalapo.
Katundu wamakina
| Grade 1 | Gires 2 | Giredi 3 | |
| Zopatsa kapena zolimbitsa mphamvu, min, MPA (PSI) | 205 (30 000) | 240 (35 000 000) | 310 (45 000,000) |
| Kukhala mphamvu, min, MPA (PSI) | 345 (50 000) | 415 (60 000) | 455 (66 0000) |
Kusanthula kwa malonda
Zitsulo sizikhala zopitilira 0,050% phosphorous.
Mitundu yovomerezeka yolemera ndi miyeso
Kutalika konse kwa mulu wa chitolirocho kudzalemedwa mosiyana ndi kulemera kwake sikusintha kapena 5% pansi pa kulemera kwake, kuwerengetsa kutalika kwake ndi kulemera kwake pamtunda
Kunja kwa m'mimba sikusintha kuposa ± 1% kuchokera ku mainchesi omwe ali kunja
Makulidwe a khoma nthawi iliyonse sadzapitilira 12.5% pansi pa khoma lotchulidwa
Utali
Kutalika Kwachimodzimodzi: 16 mpaka 25ft (4.88 mpaka 7.62m)
Kutalika kawiri kawiri: kupitirira 25ft mpaka 3ft (7.62 ku 10,67m)
Kutalika kwa yunifolomu: Veriation yovomerezeka ± 1in
Kuphatikiza pa mphamvu,Mapaipi owoneka bwino a ASTM A252Amapereka bwino kwambiri. Izi ndizofunikira makamaka kwa mapaipi omwe amadziwika ndi zinthu zoyipa zachilengedwe kapena zinthu zachilengedwe. Kuphimba kuphimba pamipaka izi kumawonjezeranso kukana kwawo, kuwunikira moyo wautali ndi ndalama zotsika.
Kuphatikiza apo, mapaipi owoneka bwino a ASTM A252 amadziwika chifukwa cha kusintha kwake komanso kusavuta kukhazikitsa. Mapangidwe awo osinthika amatha kusinthidwa mosavuta kuti akwaniritse zofunika kwambiri polojekiti, pomwe chilengedwe chawo chopepuka chimapangitsa kuti ntchito ndi mayendedwe azitha kugwira ntchito mosavuta. Izi zimawapangitsa kusankha bwino ntchito zosiyanasiyana, chifukwa zimatha kukhazikitsidwa mwachangu komanso moyenera, kuchepetsa ntchito yomanga ndi ntchito yomanga.
Ubwino wina wogwiritsa ntchito anyezi a252 owoneka bwino achitsulo ndi chilengedwe chake. Opangidwa kuchokera ku zinthu zobwezerezedwanso, mapaipi awa amatha kugwiritsidwanso ntchito kapena kufungizidwa kumapeto kwa moyo wawo wothandiza, kuchepetsa mphamvu zonse zachilengedwe zamapasi ndi kukonza. Kuphatikiza apo, zomwe zimachitika nthawi yayitali komanso zosafunikira zimathandizira kukhala ndi zomangamanga zachilengedwe komanso zachilengedwe.
Pomaliza, mapaipi owoneka bwino a ASTM A252 ali ndi zabwino zingapo zomwe zimapangitsa kuti ikhale chisankho choyamba pomanga bomba. Mphamvu zawo zazikulu, kukhazikika, kutunkha, kusinthasintha komanso kusakhazikika kwachilengedwe kumapangitsa iwo kukhala oyenererana ndi ntchito zosiyanasiyana mafakitale osiyanasiyana. Posankha mapaipi awa, opanga mapulojekiti amatha kuonetsetsa kuti dongosolo lodalirika komanso lokhalitsa lomwe limakumana ndi miyezo yapamwamba kwambiri komanso yothandiza kwambiri.
