0 Scope
适用范围
This document is to be ud for structural steelwork of JEBSENS 30,000 TDW SELF-UNLOADING BULK CARRIER project.
本要求适用于JEBSENS 30,000 TDW 自卸式散货船 项目钢结构工程。
All welding shall be carried out in such a quence as to avoid excessive residual stress and minimize distortion分贝的意思.
所有焊接应采取适当的顺序，以避免过大的残余应力和减少变形。
1 General
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1.1 Normally, the welding quence for plate butts shall be as showed in Fig. 6. And the e
nds of welds first finished shall be free of any unacceptable defect. But when a seam is to pass an unwelded or finished “dead end” butt, welding shall be stopped at 200-300mm from the unwelded butt “dead end”. After the recordtypecompletion of the butt, proceed with the am welding (e Fig.1).
一般的，板材拼接应按照图6所示顺序进行，且先完成焊缝的端部不得有任何不合格的缺陷。但是当一大接缝需焊接通过一未焊接或未焊完的端接头时，要在距端接头200-300mm处停止，在完成端接头以后，再完成大接缝（如图1）。
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Fig. 1 Welding quence for crosd welds 图1交叉焊缝的焊接顺序 |
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1.2 The beveled side of single “V” joints and the larger beveled side of double “V” joints shall be welded first unless otherwi noted.
除非另有要求，应该先焊接单面坡口的开坡口侧和双面坡口的较大坡口侧。
sm全称1.3 For block welding, internal structure can not be welded to the shell before the completion of shell welding.
在分段焊接中，只有外板焊完后才能将内部结构焊到外板上。
1.4 Backstep or wandering ptactice is recommended for long weld bysupr SMAW or FCAW-G( e Fig. 2 and Fig. 3).
用手工焊或CO2气体保护焊焊接长焊缝时，应采用分段退焊或跳焊（见图2和图3）。
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Fig. 2 Backstep practice 图2分段退焊工艺 | Fig. 3 Wandering kind怎么读practice 图3跳焊工艺 |
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cdns1.5 Penetrations through the shell (a chests, etc.) shall be welded to the shell only after shell welding in the area has been completed.
外板上，只有全部完工的区域，才能将其它结构（海水箱等）焊到外板上。
1.6 Interction of longitudinals and transver stiffeners should be welded 2013六级作文first before they are welded to the plate( e Fig. 4 ). However, it is also considered acceptable welding longitudinal longitudinals to the plating prior to fitting and / or welding of transver stiffeners.
龙骨与扶强材交错处应先焊好，再焊到板上（见图4），但也可以考虑横向结构装焊完之前将纵向扶强材焊到板上。
Fig. 4 Welding quence for plate butt welds
图4板列对接焊接顺序
1.7 Welding, should be started from the midship and progress to side, forward, and aft. And so do each single block.
焊接要从船舯开始，然后向舷侧、艏部和艉部进行，各个分段也要用相同的方法焊接，从中间向四周辐射进行。
1.8 Reinforce collars for stiffener cut-open shall be welded to the stiffenercretary的音标 first, and then lapped to the member which has the cut-open(e Fig. 5).
补板加强的地方，应先将补板焊到穿越扶强材上，再搭焊到被开孔结构上（见图5）。
Fig. 5 Welding quence for reinforce collars
图5加强补板的recommend是什么意思焊接顺序
2 Typical welding quences
典型焊接顺序
2.1 Plate butt welds
板列对接焊缝
Fig. 6 Welding quence for plate butt welds
图6板列对接焊接顺序
2.2 Flat structure
平面分段
2.2.1 Deck
甲板分段
First weld the vertical fillets( Fig. 4 (a) ), then weld the flat fillets( Fig. 4 (b) ).
先焊立角焊缝(图7(a))，再焊平角焊缝 (图7(b))。
Fig. 7 Welding quence for deck flat structure
