Amapayipi ensimbi engagqwali anezindonga ezacile asetshenziswa kakhulu ezimbonini nasezimbonini zezentengiselwano, izinto ezisetshenziswa kakhulu yi-304 kanye ne-316L yensimbi engagqwali. Lezi zinsimbi ezimbili ezingenasici zinokumelana nokugqwala okuhle kakhulu kanye nezakhiwo zemishini ngakho-ke zikhethwa njengezinto ezikhethwayo zamapayipi ensimbi engenasici anezindonga ezincane. Ngezansi ngizochaza ukuthi kungani kufanele ukhethe i-304 noma i-316L yensimbi engagqwali.

Okokuqala, amapayipi ensimbi engagqwali adinga ukumelana nokugqwala okuhle ngoba ngokuvamile asetshenziselwa ukuthutha izinto ezihlukahlukene, kuhlanganise noketshezi, amagesi namakhemikhali. I-304 insimbi engagqwali iyinto evamile yensimbi engagqwali equkethe u-18% we-chromium kanye ne-nickel engu-8%. Lokhu kwakheka kwamakhemikhali kunikeza insimbi engagqwali engu-304 ukumelana okuhle kakhulu nokugqwala, kuyenza imelane nemithombo yezindaba egqwalayo evame kakhulu, njengamanzi, ama-asidi, nama-alkali. Ngakho-ke, amapayipi ensimbi engagqwali angu-304 asetshenziswa kabanzi embonini jikelele nasezindaweni zokwakha.

Uma kuqhathaniswa, insimbi engagqwali engu-316L inokumelana nokugqwala okuphezulu. Iqukethe i-2-3% ye-molybdenum, ehlinzeka ngokuvikeleka okwengeziwe ngokumelene nokugqwala. Lokhu kuvumela ipayipi lensimbi engagqwali elingu-316L ukuthi lisebenze kahle ezindaweni eziqinile, ikakhulukazi lapho ama-ion e-chloride noma amanye amagesi abolayo ekhona. Ngakho-ke, amapayipi ensimbi engagqwali angu-316L asetshenziswa kabanzi embonini yamakhemikhali, yasolwandle, neyokucubungula ukudla, enezidingo eziphakeme zokumelana nokugqwala.

Okwesibili, amapayipi ensimbi engagqwali nawo adinga ukuba nezakhiwo ezinhle zemishini ukuze ahlangabezane nezidingo ezahlukahlukene zohlelo. Kokubili insimbi engagqwali engu-304 kanye ne-316L inamandla amakhulu nokuqina, okuyenza ifanelekele amasistimu amapayipi ezindaweni ezinomfutho ophezulu kanye nezinga lokushisa eliphezulu. Ukwengeza, zombili izinto zokwakha kulula ukuzisebenzisa ngomshini nokushisela, zinikeza ukuguquguquka okukhulu komklamo.

Kafushane, ukukhetha kwensimbi engagqwali engu-304 noma engu-316L njengempahla yamapayipi ensimbi engenasici anezindonga ezincane kusekelwe ekumelaneni nokugqwala okuhle kakhulu kanye nezakhiwo zemishini. Ngokuya ngezidingo ezithile zohlelo lokusebenza kanye nezimo zemvelo, ukukhetha izinto ezifanele zensimbi engagqwali kungaqinisekisa ukwethembeka nokuqina kwesistimu yakho yamapayipi.