图例焊接培训讲义.docxVIP

图例焊接培训讲义All short strong backs for erection joint to be installed inside of shellplae. Long strong backs can be used on outside.（所有外板对接逢马板须安装在里面，长的加排可以在外面）Safety arrangement: Ventilation to be supplied for all tank; Light to be had for erection area i.w.o dark area; safety staging to be arranged for erection area.（所有舱需要准备通风，照明需要到位，梯子需要固定）“5S” to be done for all progress.（5S要做到位）（）Rust, water to be removed before welding.（焊前不许有锈有水）Bevel to be made for fillet welding seam i.w.o the gap more than 5mm.and the bevel to be smooth. （角焊缝间隙超过5MM需要开坡口且坡口要光顺） Bevel to be 45~50 degree for butt joint（对接焊坡口角度在45°—50°）. Welding remains to be removed i.w.o refit area.（开刀的地方老根要去除）Repair welding to be longer than 50mm. Repair welding for defects on butt welding seam to be gouged.（修补焊要大于50MM）pre-heating to be done i.w.o the plate thickness more than 30mm for erection joint.（合拢口对接板厚大于30MM要预热，最低预热温度要达到80°）NDT to be finished before erection joint final inspection after welding. (MT for all the cut area for lifting padeye to be done).（NDT报告报验焊后之前需要提交，所有调码区域MT）Build up if any to be informed and to be confirmed by owner before welding. And UT to be done for that area.（长肉的地方需要经过船东同意且焊前要经过船东确认，长肉的地方UT报告提交）Protection against painting damage to be done. Especial PSPC area. （PSPC要求的地方需要保护）12. For the “T” butt joint, Head to be continue welding. （T接头的地方要连续）Tack welding to be at backside of bevel and longer than 50mm, the quality to be same as normal welding. （定位焊要在坡口反面，切定位焊质量要符合工艺要求）14. Module line to be made if necessary. 15. Heating box to be used for manual electrode.（保温桶需要正确使用）16. Deep penetration and full penetration welding to be marked with painting nearly welding seam. （现场用油漆笔标注出深溶和全熔的位置）17. Painting to be removed on oil-tightness welding seam before air test for oil tank. （密性前腰去除油漆）18. Smooth grinding to be done for lower stool inner plate and longitudinal BHD inner plate.19. Welding seam to be straight and w