HPMOD Nb炉管在特殊工况下的焊接工艺  

Welding technology of HPMOD+Nb furnace tube under special conditions

作　　者：黄礼琼 孟晋安 李剑 

机构地区：[1]兰州石化维达公司,甘肃兰州730060 [2]兰州石化公司,甘肃兰州730060

出　　处：《电焊机》2016年第1期71-73,共3页Electric Welding Machine

摘　　要：在对HPMOD+Nb(Z40Cr25Ni35Nb)炉管进行紧急停车检修过程中,由于工艺条件的限制,现场焊接工况较差,炉管内部有正压空气流,焊接过程中无法进行背部充氩保护。应用TYPE I型免充氩保护剂焊接技术进行施焊,焊后进行100%PT检测,焊接效果良好。组对间隙为4 mm时能有效防止焊缝根部未熔合;炉管内部鳍片采用专用坡口机可提高施工效果和保护焊缝质量。On HPMOD＋Nb（Z40Cr25Ni35Nb） in the process of furnace tube for emergency shutdown overhaul,due to the limitation of process conditions,the welding condition is bad,there is positive pressure air flow inside furnace tube,back filled argon protection may be not possible in the welding process. Adopt TYPE I type no argon protective agent filling welding technology in welding, 100% PT tests ＇after welding, the welding effect is good. Group of clearance for 4 mm can effectively prevent the weld root incomplete fusion; fins inside furnace tube through a dedicated groove machine can improve the effect of the construction and protection of weld quality.

关 键 词：HPMOD+Nb Z40Cr25Ni35Nb 炉管焊接 免充氩保护剂 

分 类 号：TG457.6[金属学及工艺—焊接]