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
