2. Construction Program 1）短焊缝（见图九）
Short welding seam (see figure 9)
图九：短焊缝施焊顺序图
Figure 9 Welding sequence for short welding seam
将一条长焊缝以中心点为界，分为两个焊缝编号。
The central point of long welds will be based as the boundary, divide a long weld into two weld numbers.
采用分段退焊+跳焊法进行施焊，两个焊工采用相近的焊接参数，同时施焊。即按图九所示先同时焊D、F段，再同时焊B、H段，依次类推。再同时焊跳段部分，使焊缝整体施焊方向与分段施焊方向相反。
Back-step welding plus skip welding are to be adopted for welding operation, in which two welders carry out welding simultaneously with similar welding parameters. That is to say, at first, they simultaneously weld D and F sections as shown in figure 9 and afterwards B and H sections, and the like. At the same time, the skipped section shall be welded, so that the overall welding direction of the welding seam is opposite to that of the section welding. 2）. 长焊缝（见图十）
Long welding seam (see figure 10)
图十：长焊缝施焊顺序图
Figure 10: Welding sequence for long welding seam
将一条长焊缝以中心点为界，分为两个焊缝编号。
The central point of long welds will be based as the boundary, divide a long weld into two weld numbers.
施焊顺序同短焊缝。即当焊工甲按图示方向施焊A段时，焊工乙同时按图示方向施焊等长的
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2. Construction Program B'段，再同时焊C、D'段，依次类推。再同时焊跳段B、A'等部分，使焊缝整体施焊方向与分段施焊方向相反。
The welding sequence is identical to that of short welding seam. That is to say, when welder A is welding section A in accordance with the direction as shown in the figure, welder B shall simultaneously weld section B' with same length as A and afterwards weld sections C and D', and the like. At the same time, skipped sections B, A' and etc. shall be welded, so that the overall welding direction of the welding seam is opposite to that of the section welding.
顶板长焊缝的整体施焊顺序是先焊中间的焊缝，依次向两边对称施焊。即首先施焊焊缝11、16，其次22、17，再12、15，然后21、18，依次类推。
The welding sequence for long welding seam on the top plate shall be to weld the middle seam at first, and then to symmetrically conduct welding towards both sides in turn. That is to say, firstly weld the welding seam of 11 and 16, secondly 22 and 17, thirdly 12 and 15, then followed by 21 and 18, and the like.
e).焊缝表面清理 Welds Cleaning
去除表面熔渣、飞溅等，用酸洗膏进行酸洗，使焊缝表面整洁美观。
Remove slag and splatter from the weld face, clean the face with pickling paste to present a neat and clean weld face. 4.6.3
储罐壁焊接方法 Welding method for tank wall
a).坡口Groove
坡口加工采用机械加工。
Machining is to be adopted for processing of groove.
1). 纵向焊缝坡口（见图十一）Longitudinal weld groove (see figure 11)
图十一：储罐壁纵向焊缝坡口图
Figure 11: Diagram for longitudinal weld groove on tank wall
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2. Construction Program 2).环向焊缝坡口（见图十二）Circular weld groove (see figure 12) 储罐环向焊缝仅对上层壁板的下缘开坡口，下层壁板不开坡口。
Grooves are to be opened only on lower edges of the upper wall plate for the circular welding seam of the storage tank. No grooves will be opened on the lower wall plate.
图十二：储罐壁环向焊缝坡口图
Figure 12: Diagram for circular weld groove on tank wall
b).组对 Assembly
按照坡口要求进行组对。以点固焊长不小于50mm，间距300m m，对母材进行点焊固定。 Conduct assembly as per groove requirements. Tack welding is to be conducted to fix the metal base, with the length of tack welding not less than 50mm and spacing to be 300mm. c).焊口施焊顺序 Welding sequence
在焊接打底焊道①和填充盖面焊道②③后，进行背面清根、目视检查，再进行清根焊道的焊接。应结合母材的材质和厚度等因素控制层间温度。
After welding the backing weld ① and filling cover pass ②③, carry out back gouging, visual inspection and afterwards welding of the back gouging pass. The interpass temperature control shall be in combination with material and thickness of the base metal .
1).纵向焊口施焊顺序（见图十三）Welding sequence for longitudinal crater (see figure 13)
图十三：纵向焊口施焊顺序图
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2. Construction Program Figure 13: Diagram for welding sequence of longitudinal crater
2). 环向焊口施焊顺序（见图十四） Welding sequence for circular crater (see figure 14)
图十四：环向焊口施焊顺序图
Figure 14: Diagram for welding sequence of circular crater
d).储罐壁焊缝施焊顺序 Welding sequence for welding seam on tank wall 总体顺序：纵向焊缝---横向焊缝
General sequence: longitudinal weld---transverse weld
焊缝分布见图十五，以0°为始点，按逆时针方向，1/4圆周为一条焊缝。
Weld distribution is shown in figure 15. 1/4 periphery is one weld at the counter-clockwise direction, with 0° as the starting point.
（1）---（20）为纵向焊缝，（21）---（40）为横向焊缝。
---（20） is the longitudinal weld and （21）---（40） transverse weld.
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2. Construction Program 图十五：储罐壁本体组对焊口分布图
Figure 15: Crater distribution diagram for assembly of tank wall body
1). 纵向焊缝 Longitudinal weld
纵向焊缝采用跳焊法，其施焊顺序见图十六：
Skip-welding method shall be adopted for longitudinal weld. Please refer to figure 16 for its welding sequence.
General welding direction
图十六：储罐壁纵向焊缝施焊顺序图
Figure 16: Diagram for welding sequence of longitudinal weld on tank wall
焊完A段后，再焊C、E段，然后再焊跳段B、D段。纵向焊缝整体施焊方向为由下至上。 Firstly, weld section A, second, weld sections C and E, and then weld the skipped sections B and D. General welding direction of longitudinal weld is from the bottom to the top. 2). 环向焊缝 Circular weld
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Project Title：Storage Tanks for Jilin Hydrogen Peroxide Project