為了降低成本,節約貴重的不銹鋼,或者為了適應鋼管外表面使用環境的不同要求,近年來研究開發出焊接在線亞洲日產一區二區:不銹鋼復合管。焊接不銹鋼復合管一般分為:大口徑厚壁復合管和小口徑薄壁復合管;大口徑厚壁復合管采用復合板生產,小口徑薄壁復合管采用復合卷板生產,生產加工方式和不銹鋼焊管基本相同。目前,我國生產不銹鋼復合管可執行的標準有CJ/T 184-2003(《不銹鋼塑料復合管》)和GB/T 18704-2002(《不銹鋼復合管》)。
1. 用復(fu)合板(ban)加工生產的復(fu)合管
不(bu)銹(xiu)(xiu)鋼(gang)復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)一般是(shi)(shi)用(yong)(yong)(yong)不(bu)銹(xiu)(xiu)鋼(gang)復(fu)(fu)(fu)合(he)(he)(he)(he)板(帶)加工生(sheng)產的(de)(de),其生(sheng)產方式和不(bu)銹(xiu)(xiu)鋼(gang)焊(han)(han)(han)管(guan)基本一樣,但其焊(han)(han)(han)接較(jiao)不(bu)銹(xiu)(xiu)鋼(gang)焊(han)(han)(han)管(guan)復(fu)(fu)(fu)雜,填充材料的(de)(de)合(he)(he)(he)(he)金量要高于(yu)復(fu)(fu)(fu)合(he)(he)(he)(he)層的(de)(de)合(he)(he)(he)(he)金含(han)量。圖11-121a是(shi)(shi)內(nei)復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)示意圖,用(yong)(yong)(yong)于(yu)管(guan)道(dao)(dao)內(nei)輸(shu)送(song)流(liu)通(tong)腐蝕(shi)(shi)(shi)介質(zhi);圖11-21b是(shi)(shi)外(wai)(wai)復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)示意圖,用(yong)(yong)(yong)于(yu)管(guan)道(dao)(dao)內(nei)輸(shu)送(song)流(liu)通(tong)普通(tong)介質(zhi),外(wai)(wai)表面(mian)處于(yu)腐蝕(shi)(shi)(shi)環境(jing)或(huo)在腐蝕(shi)(shi)(shi)介質(zhi)之(zhi)中,一般是(shi)(shi)作為裝(zhuang)飾管(guan)用(yong)(yong)(yong);圖11-21c是(shi)(shi)內(nei)、外(wai)(wai)復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)示意圖,用(yong)(yong)(yong)于(yu)管(guan)道(dao)(dao)內(nei)輸(shu)送(song)流(liu)通(tong)腐蝕(shi)(shi)(shi)介質(zhi),管(guan)道(dao)(dao)外(wai)(wai)表面(mian)處于(yu)腐蝕(shi)(shi)(shi)環境(jing)或(huo)在腐蝕(shi)(shi)(shi)介質(zhi)之(zhi)中。薄(bo)壁復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)可采用(yong)(yong)(yong)連續(xu)成(cheng)型(xing)焊(han)(han)(han)接方式生(sheng)產,厚壁復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)可采用(yong)(yong)(yong)非(fei)連續(xu)成(cheng)型(xing)焊(han)(han)(han)接生(sheng)產。不(bu)銹(xiu)(xiu)鋼(gang)復(fu)(fu)(fu)合(he)(he)(he)(he)管(guan)的(de)(de)焊(han)(han)(han)接,見(jian)第二章(zhang)《2.2.3不(bu)銹(xiu)(xiu)鋼(gang)復(fu)(fu)(fu)合(he)(he)(he)(he)板的(de)(de)焊(han)(han)(han)接》。

2. 套裝復合管
套(tao)(tao)裝復合管(guan)(guan)(guan)(guan)是(shi)(shi)(shi)采用(yong)兩(liang)種兩(liang)支或兩(liang)種三支管(guan)(guan)(guan)(guan)子(zi)套(tao)(tao)裝在一起(qi)的復合管(guan)(guan)(guan)(guan)。被套(tao)(tao)裝的管(guan)(guan)(guan)(guan),可以(yi)(yi)是(shi)(shi)(shi)無(wu)縫管(guan)(guan)(guan)(guan)也可以(yi)(yi)是(shi)(shi)(shi)焊接管(guan)(guan)(guan)(guan)。如果(guo)是(shi)(shi)(shi)采用(yong)焊接管(guan)(guan)(guan)(guan),焊管(guan)(guan)(guan)(guan)的內(nei)外(wai)(wai)焊縫應做(zuo)整平處理。為(wei)了(le)滿足用(yong)戶要求,套(tao)(tao)裝復合管(guan)(guan)(guan)(guan)的組合,可以(yi)(yi)外(wai)(wai)層(ceng)是(shi)(shi)(shi)不銹(xiu)鋼管(guan)(guan)(guan)(guan),內(nei)層(ceng)是(shi)(shi)(shi)普(pu)通碳鋼管(guan)(guan)(guan)(guan);也可以(yi)(yi)內(nei)層(ceng)是(shi)(shi)(shi)不銹(xiu)鋼管(guan)(guan)(guan)(guan),外(wai)(wai)層(ceng)是(shi)(shi)(shi)普(pu)通碳鋼管(guan)(guan)(guan)(guan);還可以(yi)(yi)內(nei)、外(wai)(wai)都是(shi)(shi)(shi)不銹(xiu)鋼管(guan)(guan)(guan)(guan)而中(zhong)間是(shi)(shi)(shi)普(pu)通碳鋼管(guan)(guan)(guan)(guan)。

