Pankhani yopanga mapaipi, miyezo ndi zofunikira zosiyanasiyana ziyenera kutsatiridwa kuti zitsimikizire kuti chinthu chomaliza chili bwino komanso chotetezeka.ASTM A139ndi muyezo umodzi womwe umagwira ntchito yofunika kwambiri popanga mapaipi achitsulo kuti agwiritsidwe ntchito m'njira zosiyanasiyana.
ASTM A139 ndiye muyezo wokhazikika wa chitoliro chachitsulo cholumikizidwa ndi electrofusion (arc) (NPS 4 ndi kupitirira apo). Chimakhudza zofunikira za chitoliro cholumikizidwa ndi electrofusion (arc) chozungulira, khoma lopyapyala, chitoliro chachitsulo chozungulira chozungulira kuti chigwiritsidwe ntchito mowononga kapena kutentha kwambiri. Muyezo uwu umafotokoza zofunikira pa zipangizo, njira zopangira, miyeso ndi mawonekedwe a makina a mapaipi achitsulo.
Zofunikira za ASTM A139 zimafotokoza mitundu ndi magulu a chitsulo chomwe chingagwiritsidwe ntchito popanga mapaipi. Izi zikuphatikizapo kapangidwe ka mankhwala a chitsulo, chomwe chiyenera kukhala ndi magawo enaake a zinthu monga kaboni, manganese, phosphorous, sulfure ndi silicon. Zofunikira izi ndizofunikira kwambiri kuti chitsulo chomwe chimagwiritsidwa ntchito chigwiritsidwe ntchito.mapaipiimakwaniritsa mphamvu zofunikira komanso miyezo yolimbana ndi dzimbiri.
Njira yopangira chitoliro cha ASTM A139 imaphatikizapo kuwotcherera kwa electrofusion (arc), komwe kumagwiritsa ntchito arc yamagetsi kuti apange kutentha komwe kumafunikira kuti kulumikize zingwe zachitsulo kukhala mawonekedwe a cylindrical. Njirayi imayendetsedwa mosamala kuti zitsimikizire kuti zolumikizirazo ndi zapamwamba komanso zopanda zilema. Muyezowu umatchulanso njira zowunikira zolumikizira, monga kuyesa kwa ultrasound ndi kuyesa kupindika kolunjika, kuti zitsimikizire kuti zikukwaniritsa miyezo yofunikira yaubwino.
Ponena za miyeso, ASTM A139 imafotokoza zofunikira pa kukula kwa chitoliro, makulidwe a khoma, ndi kutalika. Izi zikuphatikizapo kulekerera kwapadera pa miyeso kuti zitsimikizire kuti chitolirocho chikukwaniritsa zofunikira pa ntchito yake. Zofunikira za miyeso iyi ndizofunikira kwambiri kuti zitsimikizire kuti mapaipi ayikidwa ndikulumikizidwa molondola mu ntchito zosiyanasiyana.
Makhalidwe a makina monga mphamvu yokoka, mphamvu yotulutsa, ndi kutalika kwa chitolirocho zafotokozedwanso mu ASTM A139. Makhalidwe amenewa ndi ofunikira podziwa mphamvu ndi magwiridwe antchito a chitolirocho pansi pa mikhalidwe yosiyanasiyana yogwirira ntchito. Muyezowu umakhazikitsa zofunikira zochepa pa makhalidwe a makinawa kuti zitsimikizire kuti chitolirocho chikhoza kupirira kupsinjika, kutentha ndi mikhalidwe yofunikira.
Ponseponse, ASTM A139 imagwira ntchito yofunika kwambiri popangamapaipi achitsulopa ntchito zosiyanasiyana. Mwa kutchula zipangizo, njira zopangira, miyeso ndi makhalidwe a makina a mapaipi, muyezowu umaonetsetsa kuti chinthu chomaliza chikukwaniritsa miyezo yofunikira ya khalidwe ndi chitetezo. Umapatsa opanga, mainjiniya ndi ogwiritsa ntchito chidaliro chakuti chitolirocho chigwira ntchito monga momwe amayembekezera pa ntchito yake yomwe akufuna.
Mwachidule, kumvetsetsa kufunika kwa ASTM A139 popanga mapaipi ndikofunikira kwambiri kuti zitsimikizire kuti zinthu zopangira mapaipi achitsulo ndizabwino komanso zotetezeka. Muyezowu umakhazikitsa zofunikira pa zipangizo, njira zopangira, miyeso ndi mawonekedwe a makina kuti zitsimikizire kuti mapaipi akukwaniritsa miyezo yofunikira ya khalidwe ndi magwiridwe antchito. Potsatira ASTM A139, opanga amatha kupanga mapaipi achitsulo apamwamba kwambiri omwe amakwaniritsa zosowa za mafakitale ndi ntchito zosiyanasiyana.
Nthawi yotumizira: Disembala-28-2023