Emkhakheni wokukhiqiza amapayipi, kudingeka kulandelwe amazinga ahlukahlukene kanye nezincazelo ukuqinisekisa ikhwalithi nokuphepha komkhiqizo wokugcina.I-ASTM A139ingenye yezindinganiso ezinjalo edlala indima ebalulekile ekukhiqizweni kwamapayipi ensimbi ezinhlelo zokusebenza ezahlukahlukene.
I-ASTM A139 iyincazelo ejwayelekile yepayipi lensimbi elihlanganisiwe le-electrofusion (arc) (NPS 4 nangaphezulu). Ihlanganisa izidingo zepayipi lensimbi elihlanganisiwe le-spiral seam (arc) elihlanganisiwe, udonga oluncane, ipayipi lensimbi elihlanganisiwe le-austenitic lokusetshenziswa okugqwalisayo noma okushisa okuphezulu. Leli zinga lichaza izidingo zezinto zokwakha, izinqubo zokukhiqiza, ubukhulu kanye nezakhiwo zemishini zamapayipi ensimbi.
Izidingo zezinto ze-ASTM A139 zichaza izinhlobo namazinga ensimbi angasetshenziswa ukwenza amapayipi. Lokhu kufaka phakathi ukwakheka kwamakhemikhali ensimbi, okumele kuqukathe amaphesenti athile ezinto ezifana nekhabhoni, i-manganese, i-phosphorus, i-sulfur kanye ne-silicon. Lezi zidingo zibalulekile ekuqinisekiseni ukuthi insimbi esetshenziswa kuamapayipiihlangabezana nezindinganiso zamandla adingekayo kanye nokumelana nokugqwala.
Inqubo yokukhiqiza yepayipi le-ASTM A139 ihilela ukushisela nge-electrofusion (arc), okusebenzisa i-arc kagesi ukukhiqiza ukushisa okudingekayo ukushisela imichilo yensimbi ibe yisimo esiyindilinga. Le nqubo ilawulwa ngokucophelela ukuqinisekisa ukuthi ukushisela kusezingeni eliphezulu futhi akunazo iziphambeko. Indinganiso iphinde ichaze izindlela zokuhlola zokushisela, njengokuhlolwa kwe-ultrasonic kanye nokuhlolwa kokugoba okuqondiswa ngokugoba, ukuqinisekisa ukuthi kuhlangabezana nezindinganiso zekhwalithi ezidingekayo.
Ngokuphathelene nobukhulu, i-ASTM A139 ichaza izidingo zosayizi wepayipi, ukujiya kodonga, kanye nobude. Lokhu kufaka phakathi ukubekezelelana okuthile kobukhulu ukuqinisekisa ukuthi ipayipi lihlangabezana nemininingwane edingekayo yokusetshenziswa kwalo okuhlosiwe. Lezi zidingo zobukhulu zibalulekile ekuqinisekiseni ukuthi amapayipi afakiwe futhi axhunywe kahle ezinhlotsheni ezahlukene zezicelo.
Izakhiwo zemishini ezifana namandla okudonsa, amandla okukhiqiza, kanye nokwelulwa nazo zichazwe ku-ASTM A139. Lezi zakhiwo zibalulekile ekunqumeni amandla kanye nokusebenza kwepayipi ngaphansi kwezimo zokusebenza ezahlukahlukene. Indinganiso ibeka izidingo ezincane zalezi zakhiwo zemishini ukuqinisekisa ukuthi ipayipi lingamelana nokucindezela okulindelekile, izinga lokushisa kanye nezimo zemvelo.
Sekukonke, i-ASTM A139 idlala indima ebalulekile ekukhiqizweni kweamapayipi ensimbikwezicelo ezahlukahlukene. Ngokuchaza izinto zokwakha, izinqubo zokukhiqiza, ubukhulu kanye nezakhiwo zemishini zamapayipi, indinganiso iqinisekisa ukuthi umkhiqizo wokugcina uhlangabezana nezindinganiso zekhwalithi nezokuphepha ezidingekayo. Inikeza abakhiqizi, onjiniyela kanye nabasebenzisi bokugcina ukuzethemba kokuthi ipayipi lizosebenza njengoba kulindelekile ekusetshenzisweni kwalo okuhlosiwe.
Ngamafuphi, ukuqonda ukubaluleka kwe-ASTM A139 ekukhiqizweni kwamapayipi kubalulekile ekuqinisekiseni ikhwalithi nokuphepha kwemikhiqizo yamapayipi ensimbi. Indinganiso ibeka izidingo ezidingekayo zezinto zokwakha, izinqubo zokukhiqiza, ubukhulu kanye nezakhiwo zemishini ukuqinisekisa ukuthi amapayipi ahlangabezana nezindinganiso zekhwalithi kanye nokusebenza ezidingekayo. Ngokunamathela ku-ASTM A139, abakhiqizi bangakhiqiza amapayipi ensimbi esezingeni eliphezulu ahlangabezana nezidingo zezimboni nezinhlelo zokusebenza ezahlukahlukene.
Isikhathi sokuthunyelwe: Disemba-28-2023