湖南安全技术职业学院HunanVocationalInstituteofSafetyTechnology毕业设计设计题目：星沙天然气管道管线改造工程施工方案学生姓名：罗海文专业班级：工程安全评价与监理1201指导老师：候站正系主任：谢圣权评阅人：刘晓辉2015年9月目录第一章编制说明................................................................................................31.1编制依据...............................................................................................31.2施工执行的规范标准...........................................................................3第二章工程概况................................................................................................42.1工程概况...............................................................................................42.2工程特点...............................................................................................42.3工程目标...............................................................................................4第三章天然气的组成和特性............................................................................53.1组成.......................................................................................................53.2特性.......................................................................................................53.2供应方式...............................................................................................5第四章施工工艺流程........................................................................................64.1测量放线...............................................................................................64.2施工作业带的清理...............................................................................74.3管沟开挖...............................................................................................74.4管沟回填...............................................................................................74.5管道组对及焊接...................................................................................74.6焊接检验...............................................................................................84.7管道防腐........