二氧化碳液態低溫容器槽車是由外容器和內容器組成。內容器材質為06Cr18Ni11Ti不銹鋼，壁厚16mm。內容器外形尺寸：直徑1600mm，長為5786mm，容積為11m3。除進行外觀目視檢查外，還必須對焊縫進行100％的滲透檢測和100％的射線檢測。內容器還要進行2.88MPa干燥無油壓縮空氣試驗和氦質譜真空檢漏，漏氣率不大于2×10-5Pa·L／s。
焊(han)接工藝：所有(you)縱焊(han)縫和環焊(han)縫（除一端頭與筒體環焊(han)縫外）均采用埋弧焊(han)，焊(han)機型(xing)號(hao)為(wei)MZ-1000型(xing)，采用直(zhi)流反極性電(dian)源。焊(han)絲牌號(hao)H08Cr19Ni10Ti，直(zhi)徑為(wei)4mm，焊(han)劑為(wei)HJ260。
1. 縱縫(feng)埋弧(hu)焊
鋼(gang)板(ban)放(fang)在刨(bao)邊(bian)機(ji)上按圖3-72進行坡口加工，待(dai)焊(han)鋼(gang)板(ban)放(fang)在門式(shi)焊(han)接(jie)夾具（圖3-19）上進行裝配，待(dai)焊(han)處清(qing)除油污后(hou)(hou)進行焊(han)接(jie)，焊(han)接(jie)參數見表3-62，焊(han)好第1、2層焊(han)縫(feng)(feng)后(hou)(hou)要進行清(qing)根，先用碳弧氣刨(bao)，然(ran)后(hou)(hou)用風動砂輪清(qing)理打磨出金屬光(guang)澤，并保證清(qing)根后(hou)(hou)凹槽(cao)尺寸均勻(yun)一致，然(ran)后(hou)(hou)焊(han)接(jie)第3層焊(han)縫(feng)(feng)。
2. 環縫埋弧焊
環縫(feng)(feng)(feng)埋(mai)弧(hu)焊(han)(han)(han)(han)接包(bao)括筒(tong)(tong)節與筒(tong)(tong)節和筒(tong)(tong)節與一端頭(tou)的環縫(feng)(feng)(feng)焊(han)(han)(han)(han)接。將焊(han)(han)(han)(han)好(hao)的筒(tong)(tong)節、封頭(tou)放(fang)在焊(han)(han)(han)(han)接滾輪架（見圖(tu)3-18）上進行(xing)(xing)裝配，用焊(han)(han)(han)(han)條電弧(hu)焊(han)(han)(han)(han)進行(xing)(xing)定位焊(han)(han)(han)(han)，在平臺(tai)式(shi)焊(han)(han)(han)(han)接操作機(ji)上（如圖(tu)3-19）進行(xing)(xing)環縫(feng)(feng)(feng)焊(han)(han)(han)(han)接，先(xian)焊(han)(han)(han)(han)內焊(han)(han)(han)(han)縫(feng)(feng)(feng)（第(di)1、2層）然(ran)后按縱縫(feng)(feng)(feng)工藝進行(xing)(xing)清根再焊(han)(han)(han)(han)第(di)3層焊(han)(han)(han)(han)縫(feng)(feng)(feng)，焊(han)(han)(han)(han)接參數(shu)可(ke)參表3-62。
上述(shu)縱、環(huan)縫(feng)(feng)焊接完畢，先進行目(mu)視檢查(cha)，然后(hou)進行100％滲透檢測，排除焊縫(feng)(feng)表面缺陷(xian)后(hou)，再進行100％射線檢測，焊縫(feng)(feng)內部(bu)質量應達到設(she)計圖樣要(yao)求(qiu)后(hou)才能進行下(xia)面工序。
3. 另一(yi)封(feng)頭與筒體焊接
內(nei)容(rong)(rong)器(qi)是(shi)一個(ge)(ge)密(mi)封容(rong)(rong)器(qi)（除(chu)輸入(ru)、輸出(chu)液管路外(wai)），沒有(you)人孔裝置，焊(han)(han)(han)(han)(han)接(jie)設(she)備和人員無法(fa)進(jin)(jin)入(ru)容(rong)(rong)器(qi)內(nei)操作。采(cai)用(yong)的(de)焊(han)(han)(han)(han)(han)接(jie)工藝如(ru)圖(tu)3-73所(suo)示(shi)。內(nei)環(huan)縫(feng)(feng)增加了一個(ge)(ge)環(huan)形墊圈(quan)，材質與內(nei)容(rong)(rong)器(qi)材質相同，墊圈(quan)厚度(du)(du)為4mm，寬度(du)(du)為30mm。先(xian)用(yong)鎢極(ji)氬(ya)弧焊(han)(han)(han)(han)(han)進(jin)(jin)行打底(di)焊(han)(han)(han)(han)(han)，保證焊(han)(han)(han)(han)(han)透實現單面焊(han)(han)(han)(han)(han)雙面成(cheng)形，通過(guo)100％射(she)線檢測判(pan)片合格(ge)后，進(jin)(jin)行第2層(ceng)焊(han)(han)(han)(han)(han)條電(dian)弧焊(han)(han)(han)(han)(han)，其目(mu)的(de)是(shi)提高焊(han)(han)(han)(han)(han)縫(feng)(feng)厚度(du)(du)，防止埋弧焊(han)(han)(han)(han)(han)時由(you)于熔深過(guo)大而將(jiang)(jiang)打底(di)焊(han)(han)(han)(han)(han)焊(han)(han)(han)(han)(han)縫(feng)(feng)焊(han)(han)(han)(han)(han)穿(chuan)。第3層(ceng)環(huan)形焊(han)(han)(han)(han)(han)縫(feng)(feng)用(yong)埋弧焊(han)(han)(han)(han)(han)完成(cheng)。各層(ceng)焊(han)(han)(han)(han)(han)縫(feng)(feng)的(de)焊(han)(han)(han)(han)(han)接(jie)參數見表3-63。焊(han)(han)(han)(han)(han)后將(jiang)(jiang)環(huan)焊(han)(han)(han)(han)(han)縫(feng)(feng)進(jin)(jin)行滲透檢測和射(she)線檢測合格(ge)后再進(jin)(jin)行無油干(gan)燥氣壓試驗和氮質譜真空檢漏。全部滿足圖(tu)樣技術性能要求后才能與外(wai)容(rong)(rong)器(qi)進(jin)(jin)行組裝。
