1.0.1 This code is formulated with a view to go through with national technical economy policy in welding for steel structure of building, and to live up to state-of-art technology, economy and rationality, safety and usability, and guarantee quality.
1.0.2 this code is applicable to carbon construction steel and low-alloy high-tensile structural steel welding with steels thickness is greater than or equal to 3 mm in steel structural engineering of industry as truss or wire frame (shell) structure, multilayer and high level beam/ column frame structure, etc., and civil architecture as well as general structures. Applied welding methods include manual electric arc welding, shielded arc welding, self-protecting welding, submerged arc welding, electroslag welding, electro-gas welding, stud welding and combination of correspondent welding method.
1.0.3 Welding of steel structure must comply with current relevant regulations for safety technique and labor protection of the nation.
1.0.4 not only the requirements stipulated in this (code, but also those in the current relevant ones of the nation shall be complied with for welding of steel structure.
Foreword 1
1 general provision 7
2 general requirements 8
3 materials 13
4 welding node construction 15
4.1 general requirements 15
4.2 weld groove shape and dimension 16
4.3 theoretical throat of welding 44
4.4 nodes of group welding members 59
4.5 node forms preventing plates generating lamellar tearing 64
4.7 weld node form bearing live load and resisting earthquake 76
5 Qualification of welding procedure 80
5.1 General requirements 80
5.2 Qualification rule of welding procedure 86
5.3 Provisions for renewed procedure qualification 89
5.4 The preparation of test piece and test sample 93
5.5 Test and inspection of test piece and test sample 106
6. Welding procedure 114
6.1 General requirement 114
6.2 Weld preheating and post-heating 130
6.3 Technology measures for preventing lamellar tearing 134
6.4 Technological measures for controlling welding deformations 135
6.5 Postwelding stress-relieving treatment 136
6.6 Repair of the molten weld imperfection 137
7 Welding quality inspection 139
7.1 General requirement 139
7.2 Appearance inspection 142
7.3 Nondestructive testing 146
8. Weld strength and reinforcement 149
9. Welder examination 157
9.1 General requirement 157
9.2 Examination content and classification 160
9.3 Fundamental examination of manual manipulation skills 163
9.4 Additional examination for manual manipulation skill 177
9.5 Examination for manual manipulation skill in position welding 183
9.6 Skill examination of mechanical manipulation 185
9.7 Test record, re-trial, make-up exam, re-examination, exemption from examination and certificates 194
Appendix A directional property level of steel plate thickness and its sulfur content and contraction value of cross sectional area 196
Appendix B technology rating report form and technology rating report of structural steel structural welding 197
Appendix C Clapboard Electroslag Weld inside Box Column (Beam) 213
Appendix D Ultrasonic Inspection Method and Imperfection Grades for Round Tube T, K and Y Node Weld 215
Appendix E Examination Result Registration Form and Certificate Format for Engineering Construction Welder 219
Explanation of Wording in this code 229
