BASF MDI Complex Chongqing ProjectMulti Discipline Construction The Third Chemical EngineeringContract No: CO-CQ5522-92L-012 Construction Company of China Rev.03, 25.May.2013 File No: MDI-TCC-92L012-MS-039 Page 1 of 11 Project Quality Management Preheating and Post Welding Heat Treatment Procedu re 焊前预热与焊后热处理方案 Preheating and Post Welding Heat Treatment Procedure MDI-TCC-92L012-MS-039 3 25.May .2013 Revised asTMDI comments 2 18.Apr.2013 Revised asTMDI comments GAO BIN XIA KAO FEI ZHAO QI 1 8,Mar,2013 Revised asTMDI comments GAO BIN XIA KAO FEI ZHAO QI 0 14,Jan,2013 Issue for approval GAO BIN XIA KAO FEI ZHAO QI Revision Date Revision Description Prepared By Reviewed By Approved By BASF MDI Complex Chongqing ProjectMulti Discipline Construction The Third Chemical EngineeringContract No: CO-CQ5522-92L-012 Construction Company of China Rev.03, 25.May.2013 File No: MDI-TCC-92L012-MS-039 Page 2 of 11 Project Quality Management Preheating and Post Welding Heat Treatment Procedu re 目录 Contents 1. 概述General △3 2. 编制依据 References △3 3. 焊前预热与焊后热处理执行程序和计划 PWHT Execution Plan and Procedure △3 4. 硬度检查和无损检测 Hardness Test and RT △3 5. 标识管理 Marks Management 6. 附件 Attachments BASF MDI Complex Chongqing ProjectMulti Discipline Construction The Third Chemical EngineeringContract No: CO-CQ5522-92L-012 Construction Company of China Rev.03, 25.May.2013 File No: MDI-TCC-92L012-MS-039 Page 3 of 11 Project Quality Management Preheating and Post Welding Heat Treatment Procedure 1.概述General 为了降低和消除管道焊接应力，防止出现应力腐蚀裂纹。应用电加热的方法对焊缝进行热处理，热处理适用于碳钢(t > 19mm)、和输送介质代码为701、702 管道的管子、管件。我公司施工范围内的需要热处理的有A672-C60、A106-B 两种材质。 The procedure is prepare...
