Foreword

The standard series DL/T 5210 Code for Construction Quality Acceptance and Evaluation of Electric Power Construct consists of 8 parts：

—DL/T 5210.1　Part 1：Civil Work

—DL/T 5210.2　Part 2：Boiler Unit

—DL/T 5210.3　Part 3：Steam Turbine Generator Unit

—DL/T 5210.4　Part 4：Instrumentation and Control

—DL/T 5210.5　Part 5：Piping & System

—DL/T 5210.6　Part 6：Water Treatment/Hydrogen Generation Equipment and System

—DL/T 5210.7　Part 7：Welding

—DL/T 5210.8　Part 8：Processing Preparation

This Part is the fourth part of DL/T 5210.

This Part is formulated by the National Development and Reform Commission according to the requirements of the document Announcement on Issuing the Professional Standard Project Planning in 2008（Fagaiban Gongye［2008］No.1242）.

During the drafting procedure，this Part references the content of Standard for Quality Inspection and Evaluation of Thermal Power Construction-Part of Thermal Meters and Control Devices（Dianzong［1998］No.145）.

Appendix A，Appendix B，Appendix C，Appendix D，Appendix E and Appendix F in this Part are normative.

Appendix G，Appendix H，Appendix I，Appendix J，Appendix K，Appendix L and Appendix M in this Part are informative.

This Part is proposed by the China Electricity Council.

The Technical Committee for Standardization of Thermal Power Construction in power industry is under the jurisdiction of and in charge of the explanation of this Part.

Chief Drafting Organizations：

　　　　　　Guangdong Power Engineering Corporation

　　　　　　First Electric Power Construction Company of Jiangsu Province

Participating Organizations：

　　　　　　Beijing Electric Power Construction Company

　　　　　　Northeast China Power Administration-No.1 Engineering Corporation

　　　　　　Northwestern Electric Power Construction Group Company

　　　　　　Zhejiang Electric Power Test & Research Institute

Chief Drafting Staff：

　　　　　　Fan Youlin　Chen Fayu　Guo Wei　Ye Mingjia　Wen Zhiguo　Gong Jianhua

　　　　　　Liu Aimin　Cai Qibin　Tian Zhiqun　Liu Qiang　Lang Guocheng　Sun Changsheng

The former Standard for Quality Inspection and Evaluation of Thermal Power Construction-Part of Thermal Meters and Control Devices（Dianzong［1998］No.145）shall be abolished on the issuing date of this Part.

During the process of implementing this Part，the relevant opinions and advice，whenever necessary，can be posted or passed on to the Standardization Center of the China Electricity Council（No.1，Baiguang Road Ertiao，Beijing，100761，China）.