LNG储罐9%Ni钢立缝SMAW焊接质量安全健康隐患  

Quality safety and health risks of 9%Ni steel vertical weld by SMAW for LNG tank

作　　者：韦宝成 杨尚玉 孙昕辉[2] WEI Baocheng;YANG Shangyu;SUN Xinhui(Offshore Oil Engineering Co.,Ltd.,Tianjin 300461,China;CNOOC Gas&Power Group Co.,Ltd.,Beijing 100029,China).)

机构地区：[1]海洋石油工程股份有限公司,天津300461 [2]中海石油气电集团有限责任公司,北京100029

出　　处：《电焊机》2020年第8期110-117,I0008,共9页Electric Welding Machine

摘　　要：着重讨论目前大型LNG储罐内罐9%Ni钢壁板立缝焊条电弧焊中存在的质量隐患、安全隐患及健康风险,通过分析和现场施工经验发现,造成这些隐患的原因在于焊接工艺可复制性差、焊工手工操作、碳弧气刨清根、大量打磨、监管不充分、高空作业难度大等,建议采用一种高效率的交流钨极氩弧自动焊工艺来代替传统焊条电弧焊,这种焊接工艺应具有焊接质量高、适应性强、清洁,且自动焊设备性价比高等特点。The quality,safety and health risks of 9%Ni steel vertical weld by shielded manual arc welding for large LNG tank are mainly discussed.Through analysis and field construction experience,it is found that the causes of these hidden dangers are poor replicability of welding procedure,manual operation of welder,carbon arc gouging back chipping,extensive grinding,inadequate supervision,difficulty of high altitude operation,etc.It is suggested that using an efficient automatic AC GTAW welding procedure to replace the traditi-onal shield manual arc welding.This suggested welding proc-edure has the characteristics of high quality,strong adaptab-ility,cleanliness and high cost performance.

关 键 词：9%NI钢 焊条电弧焊 质量隐患 碳弧气刨 渗碳层 

分 类 号：TG408[金属学及工艺—焊接]