銅合金是以銅為基體的一種有色金屬合金,一般分為黃銅、青銅和白銅。銅合金具有優良的導電性、導熱性、冷加工性能和良好的耐蝕性,并具有易于連接等優點,因而被制造成法蘭,廣泛應用于機械、石油、化工、輕工、船舶等行業的管道系統和裝置中,起著連接管子、泵、閥、壓力容器、各種承壓設備的重要作用。


  由(you)于銅(tong)合金(jin)的強度和硬度較低,因此銅(tong)合金(jin)法(fa)蘭(lan)使用壓力一般不高,通(tong)常公稱壓力在5.0MPa以(yi)下(xia);溫度一般在260℃以(yi)下(xia)。


  銅(tong)(tong)(tong)(tong)合金(jin)(jin)法蘭(lan)(lan)(lan)的結構型式有整(zheng)體(ti)式、焊(han)接(jie)(jie)式及松套式三種(zhong)。整(zheng)體(ti)式法蘭(lan)(lan)(lan)通常鑄造成型。焊(han)接(jie)(jie)式法蘭(lan)(lan)(lan)包括(kuo)平焊(han)和(he)對(dui)焊(han)兩種(zhong),與之(zhi)相焊(han)接(jie)(jie)的管(guan)子為(wei)銅(tong)(tong)(tong)(tong)管(guan)。松套式法蘭(lan)(lan)(lan)焊(han)環材料為(wei)銅(tong)(tong)(tong)(tong)合金(jin)(jin),法蘭(lan)(lan)(lan)材料為(wei)鋼,兩者組(zu)合在一起,焊(han)環與銅(tong)(tong)(tong)(tong)管(guan)采用銅(tong)(tong)(tong)(tong)釬焊(han),此(ci)種(zhong)松套法蘭(lan)(lan)(lan)又被(bei)稱為(wei)銅(tong)(tong)(tong)(tong)合金(jin)(jin)復合法蘭(lan)(lan)(lan)。由于在使用中法蘭(lan)(lan)(lan)與流體(ti)介質不直(zhi)接(jie)(jie)接(jie)(jie)觸,因此(ci)法蘭(lan)(lan)(lan)可由價格比銅(tong)(tong)(tong)(tong)合金(jin)(jin)便宜的鋼材制(zhi)成。