丰满水电站全面治理（重建）工程大坝土建及金属结构安装工程压力钢管制作施工方案中国水利水电第十六工程局有限公司丰满电站重建工程大坝项目经理部二○一五年七月目录1项目概述.............................................................11.1工程项目及工程量..............................................11.2工程责任......................................................22编制依据及引用的标准和规程规范.......................................22.1编制依据......................................................22.2引用的标准和规程规范..........................................23施工布置.............................................................33.1施工方案简介..................................................33.2钢板存放场地..................................................43.3防腐施工区....................................................44压力钢管制作.........................................................44.1压力钢管制作组织机构..........................................44.2压力钢管制作工艺流程..........................................54.3压力钢管制作工序..............................................64.3.1材料检验....................................................64.3.2材料存放....................................................74.3.3钢板表面预处理..............................................74.3.4钢板下料、坡口切割..........................................74.3.5钢板压头....................................................94.3.6钢板卷制....................................................94.3.7瓦片组圆....................................................94.3.8错口检查...................................................104.3.9调圆、安装内支撑、加劲环安装概述...........................104.4钢管拼装工艺要求.............................................125压力钢管焊接与焊缝检验..............................................135.1焊工和无损检验人员资格.......................................135.2焊缝分类.....................................................135.3焊接工艺评定.................................................135.4焊接方法、焊接材料及焊接设备.................................145.4.1焊接方法...................................................145.4.2焊接材料...................................................155.4.3焊接设备...................................................156压力钢管制造焊接工艺................................................156.1焊前检查及清理...............................................156.2预热.........................................................156.3定位焊.......................................................166.4纵缝焊接.....................................................166.5加劲环焊接...................................................176.6焊接工艺.....................................................186.6.1一般注意事项...............................................196.6.2正面焊缝打底焊道的焊接注意事项.............................216.6.3中间填充层焊道及盖面焊道的焊接.............................216.6.4空间焊接位置的特点及注意事项...............................226.7后热消氢处理.................................................226.8焊缝外观检查.................................................226.9无损探伤检测.................................................247缺陷的处理和补焊....................................................247.1焊缝缺陷处理和补焊...................
