Standard No.:	DL/T 819-2002
English Name:	The Code of the Welding Heat Treatment for Power Plant
Chinese Name:	火力发电厂焊接热处理技术规程
Professional Classification:	DL    Professional Standard - Electricity
Source Content Issued by:	NDRC
Issued on:	2002-04-27
Implemented on:	2002-9-1
Status:	superseded
Superseded by:	DL/T 819-2010 The code for the welding heat treatment for power plant
Superseded on:	2011-5-1
Target Language:	English
File Format:	PDF
Word Count:	5500 words
Translation Price(USD):	130.0
Delivery:	via email in 1 business day

This code specifies the requirements for the welding heat treatment of weldments during the manufacturing, installation and maintenance processes of the steel pressure pipes and parts (including pressure parts and non-pressure parts) in the power plant. This code is applicable to preheat, postheat and postweld heat treatment for weldments by heating methods.

Foreword III 1 Scope 1 2 Normative References 1 3 Technical Terms 1 4 General Provisions 2 4.1 Personnel 2 4.2 Safety Requirement 2 5 Heating methods and Equipments for Welding Heat Treatment 3 5.1 Heating Methods 3 5.2 Heating Equipments 3 6 Welding Heat Treatment Process 4 6.1 Evaluation 4 6.2 Preheat 4 6.3 Postheat 4 6.4 Postweld Heat Treatment 4 7 Measures for Welding Heat Treatment Process 5 7.1 Temperature Measurement 5 7.2 Heated Perimeter and Installation of Heating Equipments 6 7.3 Temperature Difference Control and Thermal Insulation 7 7.4 Measures for Flame Heating Process 7 8 Quality Inspection and Technical Document 7 8.1 Quality Inspection 7 8.2 Technical Document 8 Annex A 9 Annex B 11 Annex C 12 Annex D 13