√编码：FCC—TJE/方案-075综合重大一般天津100万吨/年乙烯及配套项目乙烯工程100万吨/年乙烯装置工艺管线焊接及热处理施工技术方案（REV0）编制：陈玉清审核：刘学卿批准：许建林中国石化集团第四建设公司天津100万吨/年乙烯及配套工程乙烯项目部2008年11月03日天津石化100万吨/年乙烯及配套项目乙烯工程100万吨/年乙烯装置工艺管线焊接及热处理施工技术方案目录1适用范围................................................................................................................................................12编制依据................................................................................................................................................13工程概况及特点....................................................................................................................................14焊接施工准备........................................................................................................................................84.1焊接工艺管理...................................................................................................................................84.2焊工管理...........................................................................................................................................84.3焊材管理...........................................................................................................................................84.4焊接设备管理...................................................................................................................................95施工工艺..............................................................................................................................................105.1坡口加工.........................................................................................................................................105.2焊前清理.........................................................................................................................................105.3坡口检查.........................................................................................................................................105.4焊口组对.........................................................................................................................................115.5定位焊.............................................................................................................................................115.6焊前预热及层间温度控制..............................................................................................................115.7焊接工艺.........................................................................................................................................125.8焊后热处理.....................................................................................................................................175.9硬度检测.........................................................................................................................................196质量要求及焊缝返修..........................................................................................................................206.1焊缝施工记录.................................................................................................................................206.2外观质量...
