M'munda wa kupanga zitoliro, miyezo ndi ndondomeko zosiyanasiyana ziyenera kutsatiridwa kuti zitsimikizire ubwino ndi chitetezo cha mankhwala omaliza.ASTM A139ndi mulingo umodzi wotere womwe umagwira ntchito yofunika kwambiri popanga mapaipi achitsulo pazinthu zosiyanasiyana.
ASTM A139 ndi muyezo specifications electrofusion (arc) welded zitsulo chitoliro (NPS 4 ndi pamwamba).Imakhudza zofunikira za spiral seam electrofusion (arc) welded, khoma lopyapyala, chitoliro chachitsulo cha austenitic pazogwiritsa ntchito zowononga kapena kutentha kwambiri.Muyezo uwu umafotokoza zofunikira pazida, njira zopangira, miyeso ndi makina amapaipi achitsulo.
Zofunikira za ASTM A139 zimatchula mitundu ndi magulu achitsulo omwe angagwiritsidwe ntchito popanga mapaipi.Izi zikuphatikizapo mankhwala zikuchokera zitsulo, amene ayenera kukhala ndi magawo enieni a zinthu monga carbon, manganese, phosphorous, sulfure ndi pakachitsulo.Zofunikira izi ndizofunikira pakuwonetsetsa kuti zitsulo zimagwiritsidwa ntchitomapaipiamakumana ndi mphamvu zofunikira komanso kukana dzimbiri.
Njira yopangira chitoliro cha ASTM A139 imaphatikizapo kuwotcherera kwa electrofusion (arc), yomwe imagwiritsa ntchito arc yamagetsi kuti ipange kutentha komwe kumafunikira kuti muwotcherera zitsulo kuti zikhale zozungulira.Njirayi imayendetsedwa bwino kuti zitsimikizidwe kuti zowotcherera zimakhala zapamwamba komanso zopanda chilema.Muyezowu umatchulanso njira zowunikira ma welds, monga kuyezetsa kwa akupanga ndi kuyesa kwa bend mowongolera, kuti zitsimikizire kuti zikukwaniritsa zofunikira.
Pankhani ya miyeso, ASTM A139 imafotokoza zofunikira pakukula kwa chitoliro, makulidwe a khoma, ndi kutalika.Izi zikuphatikizapo kulolerana kwapadera pa miyeso kuonetsetsa kuti chitoliro chikukumana ndi zofunikira zomwe zimagwiritsidwa ntchito.Zofunikira zazikuluzikuluzi ndizofunikira kwambiri pakuwonetsetsa kuti mapaipi aikidwa ndikulumikizidwa moyenera pazogwiritsa ntchito zosiyanasiyana.
Zida zamakina monga kulimba kwamphamvu, kulimba kwa zokolola, ndi kutalika zimafotokozedwanso mu ASTM A139.Zinthuzi ndizofunikira pakuzindikira mphamvu ndi magwiridwe antchito a chitoliro pansi pazikhalidwe zosiyanasiyana zogwirira ntchito.Muyezo umayika zofunikira zochepa pazinthu zamakinawa kuti zitsimikizire kuti chitolirocho chingathe kupirira kupanikizika, kutentha ndi chilengedwe.
Ponseponse, ASTM A139 imagwira ntchito yofunika kwambiri popangamapaipi achitsuloza ntchito zosiyanasiyana.Mwa kufotokozera zida, njira zopangira, miyeso ndi makina amapaipi, muyezo umatsimikizira kuti chomaliza chimakwaniritsa zofunikira zoyenera komanso chitetezo.Zimapatsa opanga, mainjiniya ndi ogwiritsa ntchito mapeto chidaliro kuti chitolirocho chidzachita monga momwe akuyembekezeredwa pakugwiritsa ntchito kwake.
Mwachidule, kumvetsetsa kufunikira kwa ASTM A139 pakupanga mapaipi ndikofunikira pakuwonetsetsa kuti zinthu zili bwino komanso chitetezo cha zida zachitsulo.Muyezowu umayika zofunikira pazida, njira zopangira, miyeso ndi zida zamakina kuti zitsimikizire kuti mapaipi amakwaniritsa zofunikira komanso magwiridwe antchito.Potsatira ASTM A139, opanga amatha kupanga chitoliro chachitsulo chapamwamba chomwe chimakwaniritsa zofunikira za mafakitale ndi ntchito zosiyanasiyana.
Nthawi yotumiza: Dec-28-2023