船舶舱室设备底座焊接工艺规范
WELDING PROCEDURE SPECIFICATION FOR EQUIPMENT BASE OF HULL CABIN
1 范围
Scope
本规范规定了船舶舱室重要设备底座焊接与普通设备底座焊接施工前的准备、人员、工艺要求、工艺过程、检验。
The specification rules the requirements of forewelding to preparation , personnel ,technological requirements ,technology process ,examination ;which are for ba of important equipments and common equipments of hull cabin .
本规范适用于各类船舶舱室设备底座的焊接。
The specification apply to the welding for equipment ba of diversified hull cabin .
2 规范引用文件 «船舶建造质量检验»
Referring to document ≤QUALITY INSPECTION OF SHIPBUILDING ≥
3 焊接前准备
Preparation of forewelding
3.1 CJ422钛钙型药皮碳钢焊条参数( CJ422 parameters for C steel electrode of Ti and Ca covering) 表3.1-1(form)
试验项目(Test project) | δs(Mpa) | δb(Mpa) | δ5(%) | AKV（-20°）J |
| ≥330 | ≥420 | ≥22 | ≥47 |
X射线探伤 (Radiographic inspection)：Ⅱ级（Grade two） | | | | |
焊条直径(MM) Diameter | 2.5 | 3.2 | 4 | 5 |
焊接电流(A) Current | 60~110 | 120~150 | 160~210 | 220~270 |
| | | | |
3.2 CJ507低氢钠药皮碳钢焊条参数 (CJ422 parameters for C steel electrode of low hydrogen Na covering ) 表3.2-1(form)
试验项目(Test project) | δs(Mpa) | δb(Mpa) | δ5(%) | AKV（-20℃） | J(-30℃) |
| ≥400 | ≥490 | ≥22 | ≥47 | ≥27 |
X射线探伤 (Radiographic inspection) Ⅱ级（Grade two） | | | | | |
焊条直径(MM) Diameter | 2.5 | 3.2 | 4 | 5 | 5.8 |
焊接电流(A) Current | 60~110 | 120~150 | 160~210 | 220~270 | 210~260 |
| | | | | |
3.3 焊前施工人员应先了解被焊工件的施工要求及作业环境、钢材牌号等级、据此按材料的选配原则确定焊条焊丝牌号、规格及极性。
Welder should know about the welding requirements ,environment ,brand and grand of steel before welding .According to that ,to decide the brand ,size of electrode and wire and polarity on the principle of choosing material .
3.4 定位焊
Tack welding
3.4.1定位焊用的焊条牌号应与正式焊缝的焊条牌号相同。
Electrode brand for tack welding shall be uniform with normal welds .
3.4.2定位焊高度不得超过正式焊缝的高度，焊后的熔渣应立即去除。
The height of tack welding don’t exceed normal welds , eliminating postweld slag at once .
3.4.3由于CO2定位焊容易产生焊接缺陷，定位焊缝不宜过短，一般强度钢为（30~40）mm，高强度钢为50mm，焊缝厚为（3~4）mm。
The length of tack welds shall be longer becau of making defects easily with CO2 gas-shielded arc welding .Common strength steel (30—40)mm, high strength steel 50mm ,thickness of welds (3—4)mm .
3.5 所要焊接的设备底座已经按照装配要求定位好，并且打磨焊前认可才能进入焊接阶段。
Equipment ba to be welded must be fitted on requirements like and grinded ,before it welded .
3.6对于船舶重大设备如主机、发电机、中间轴承、锚绞车、舵机及主甲板设备吊艇、舷梯等基座应选用CJ507低氢钠型药皮碳钢焊条或CO2气体保护焊。
For the grand ship equipment welding of ba of main engine , generator , intermediate bearing , windlass , steering gear , and davit , accommodation ladder which is on the main deck ; should choo CJ507 low hydrogen Na coating C steel electrode or CO2 gas-shielded arc welding .
3.7其他普通设备基座可选用普通的CJ422钛钙型药皮碳钢焊条。
May choo common CJ422 C steel electrode of Ti and Ca covering for other common
equipment ba .
3.8 焊接材料
Welding consumable
3.8.1 焊丝：
Welding wire
CO2焊丝可选用直径为（￠1.2）mm的实芯焊丝或药芯焊丝，并须经船级社认可。并有规则地盘绕在焊丝盘或焊丝筒内。
Diameter 1.2mm flux-cored wire will be ud for CO2 gas-shielded arc welding and need be approved by Society .
3.8.2 CO2气体：
CO2 gas
使用的液体二氧化碳其质量应符合国家标准GB6052-85《工业液体二氧化碳》中规定的Ⅰ类或Ⅱ类一级标准
The quality of liquid CO2 ud shall accord with grade one of type I or II ruled by national standard GB6052-85≤Industry liquid CO2 ≥
CO2气瓶压力低于1MPa时不能使用。
Don’t u it again when cylinder pressure is below 1 Mpa .
3.9 焊接设备
Welding equipment
3.9.1 CO2气体保护焊焊接设备应采用设备制造厂生产的专用设备，并应定期进行严格的检测与维修。
For CO2 gas-shielded arc welding u the special equipment that need be examined and maintained carefully every time .
3.9.2 CO2焊接电源必须具备必要的电流容量及适合于焊接的电气特性，并应有可靠的外壳安全接地。
Welding power source for CO2 gas-shielded arc welding must have necessary current volume and electric characteristic suitable for welding . It must have reliable safe grounding for crust .
3.9.3 送丝机构的控制装置，必须具备与焊接电源输出特性相应的控制机能，必须能均匀地调节焊接电流或电弧电压。
Controlling device of wire feeder must have corresponding controlling function as with the input characteristic of welding power source , rugulate current and voltage uniformly .
3.9.4 焊枪必须具备必要的电流容量及耐用性能，而且还要有良好的操作性能，必须能稳定地送丝，焊枪的外壳必须有良好的绝缘性能。
Welding gun must have current volume and can be ud for a long time , convenient operation to welder , feeding wire steadily . Crust of welding gun must have better insulated property .
4 人员
Personnel
CO2保护焊的焊工必须经过专门培训和考试，并按船级社合格证所规定之类别从事产品焊接。
手工电弧焊焊接的焊工持证方能上岗。
Welder for CO2 gas-shielded arc welding who must be specially trained and examined can be permitted to work on items ruled in certificate issued by Society .Welder for covered electrode manual arc welding can’t work unless with certificate .
