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：所有縱焊(han)縫(feng)和環(huan)(huan)焊(han)縫(feng)（除一端(duan)頭與筒(tong)體環(huan)(huan)焊(han)縫(feng)外）均(jun)采用(yong)埋(mai)弧(hu)焊(han)，焊(han)機型號為(wei)MZ-1000型，采用(yong)直流反(fan)極性電源(yuan)。焊(han)絲牌號H08Cr19Ni10Ti，直徑為(wei)4mm，焊(han)劑為(wei)HJ260。
1. 縱縫埋弧焊
鋼(gang)板放(fang)(fang)在刨邊機上(shang)按圖(tu)3-72進(jin)(jin)行(xing)坡(po)口加(jia)工，待焊(han)鋼(gang)板放(fang)(fang)在門(men)式(shi)焊(han)接(jie)夾具（圖(tu)3-19）上(shang)進(jin)(jin)行(xing)裝配，待焊(han)處清(qing)(qing)除油污后(hou)(hou)進(jin)(jin)行(xing)焊(han)接(jie)，焊(han)接(jie)參數(shu)見表3-62，焊(han)好第(di)1、2層焊(han)縫后(hou)(hou)要進(jin)(jin)行(xing)清(qing)(qing)根，先用(yong)碳弧氣刨，然后(hou)(hou)用(yong)風動砂輪清(qing)(qing)理打磨出(chu)金屬光(guang)澤，并保證清(qing)(qing)根后(hou)(hou)凹槽尺寸(cun)均勻一致，然后(hou)(hou)焊(han)接(jie)第(di)3層焊(han)縫。
2. 環縫埋弧焊(han)
環(huan)縫(feng)(feng)埋弧(hu)(hu)焊(han)(han)(han)(han)接包括筒(tong)(tong)節與筒(tong)(tong)節和筒(tong)(tong)節與一端(duan)頭(tou)的環(huan)縫(feng)(feng)焊(han)(han)(han)(han)接。將焊(han)(han)(han)(han)好的筒(tong)(tong)節、封(feng)頭(tou)放(fang)在(zai)焊(han)(han)(han)(han)接滾輪架（見圖(tu)3-18）上(shang)進(jin)(jin)行(xing)裝配，用焊(han)(han)(han)(han)條電(dian)弧(hu)(hu)焊(han)(han)(han)(han)進(jin)(jin)行(xing)定(ding)位焊(han)(han)(han)(han)，在(zai)平臺(tai)式焊(han)(han)(han)(han)接操作機上(shang)（如(ru)圖(tu)3-19）進(jin)(jin)行(xing)環(huan)縫(feng)(feng)焊(han)(han)(han)(han)接，先焊(han)(han)(han)(han)內焊(han)(han)(han)(han)縫(feng)(feng)（第1、2層）然后按縱縫(feng)(feng)工藝進(jin)(jin)行(xing)清根再焊(han)(han)(han)(han)第3層焊(han)(han)(han)(han)縫(feng)(feng)，焊(han)(han)(han)(han)接參數(shu)可參表3-62。
上述(shu)縱、環縫(feng)(feng)焊(han)接(jie)完畢，先(xian)進行目視檢(jian)查，然后進行100％滲透檢(jian)測，排(pai)除焊(han)縫(feng)(feng)表(biao)面(mian)缺陷(xian)后，再進行100％射線檢(jian)測，焊(han)縫(feng)(feng)內部質量(liang)應達到(dao)設計圖樣要(yao)求后才能進行下(xia)面(mian)工序。
3. 另一封頭與(yu)筒(tong)體焊接
內(nei)(nei)容器是一(yi)個密封容器（除輸入、輸出液管路外），沒有(you)人孔(kong)裝置(zhi)，焊(han)(han)(han)(han)接設備(bei)和人員無(wu)(wu)法(fa)進(jin)(jin)入容器內(nei)(nei)操作。采用的焊(han)(han)(han)(han)接工藝如圖(tu)3-73所(suo)示。內(nei)(nei)環縫增加了(le)一(yi)個環形(xing)(xing)墊(dian)圈，材質與內(nei)(nei)容器材質相同，墊(dian)圈厚度為4mm，寬度為30mm。先用鎢(wu)極氬(ya)弧(hu)焊(han)(han)(han)(han)進(jin)(jin)行打底焊(han)(han)(han)(han)，保證焊(han)(han)(han)(han)透實現單面焊(han)(han)(han)(han)雙面成(cheng)形(xing)(xing)，通過100％射(she)(she)線檢測判片(pian)合格(ge)后(hou)，進(jin)(jin)行第(di)2層焊(han)(han)(han)(han)條電(dian)弧(hu)焊(han)(han)(han)(han)，其目(mu)的是提高焊(han)(han)(han)(han)縫厚度，防止埋弧(hu)焊(han)(han)(han)(han)時(shi)由(you)于熔深過大(da)而將打底焊(han)(han)(han)(han)焊(han)(han)(han)(han)縫焊(han)(han)(han)(han)穿(chuan)。第(di)3層環形(xing)(xing)焊(han)(han)(han)(han)縫用埋弧(hu)焊(han)(han)(han)(han)完成(cheng)。各(ge)層焊(han)(han)(han)(han)縫的焊(han)(han)(han)(han)接參數見表3-63。焊(han)(han)(han)(han)后(hou)將環焊(han)(han)(han)(han)縫進(jin)(jin)行滲透檢測和射(she)(she)線檢測合格(ge)后(hou)再進(jin)(jin)行無(wu)(wu)油干燥氣(qi)壓試驗和氮質譜真空檢漏。全部滿足圖(tu)樣技(ji)術性(xing)能(neng)要求后(hou)才(cai)能(neng)與外容器進(jin)(jin)行組裝。
