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.
Contents Foreword 1 General Provisions 2 General requirements 3 Materials 4 Welding node construction 4.1 General requirements 4.2 Weld groove shape and dimension 4.3 Theoretical throat of welding 4.4 nodes of group welding members 4.5 node forms preventing plates generating lamellar tearing 4.6 Manufacture of members and welding node forms of the field erection 4.7 weld node form bearing live load and resisting earthquake 5 Qualification of welding procedure 5.1 General requirements 5.2 Qualification rule of welding procedure 5.3 Provisions for renewed procedure qualification 5.4 The preparation of test piece and test sample 5.5 Test and inspection of test piece and test sample 6. Welding Procedure 6.1 General requirement 6.2 Weld preheating and post-heating 6.3 Technology measures for preventing lamellar tearing 6.4 Technological measures for controlling welding deformations 6.5 Postwelding stress-relieving treatment 6.6 Repair of the molten weld imperfection 7 Welding Quality Inspection 7.1 General requirement 7.2 Appearance inspection 7.3 Nondestructive testing 8. Weld Strength and Reinforcement 9. Welder Examination 9.1 General requirement 9.2 Examination content and classification 9.3 Fundamental examination of manual manipulation skills 9.4 Additional examination for manual manipulation skill 9.5 Examination for manual manipulation skill in position welding 9.6 Skill examination of mechanical manipulation 9.7 Test record, re-trial, make-up exam, re-examination, exemption from examination and certificates Appendix A directional property level of steel plate thickness and its sulfur content and contraction value of cross sectional area Appendix C Clapboard Electroslag Weld inside Box Column (Beam) Appendix D Ultrasonic Inspection Method and Imperfection Grades for Round Tube T, K and Y Node Weld Appendix E Examination Result Registration Form and Certificate Format for Engineering Construction Welder
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.
Contents of JGJ 81-2002
Contents
Foreword
1 General Provisions
2 General requirements
3 Materials
4 Welding node construction
4.1 General requirements
4.2 Weld groove shape and dimension
4.3 Theoretical throat of welding
4.4 nodes of group welding members
4.5 node forms preventing plates generating lamellar tearing
4.6 Manufacture of members and welding node forms of the field erection
4.7 weld node form bearing live load and resisting earthquake
5 Qualification of welding procedure
5.1 General requirements
5.2 Qualification rule of welding procedure
5.3 Provisions for renewed procedure qualification
5.4 The preparation of test piece and test sample
5.5 Test and inspection of test piece and test sample
6. Welding Procedure
6.1 General requirement
6.2 Weld preheating and post-heating
6.3 Technology measures for preventing lamellar tearing
6.4 Technological measures for controlling welding deformations
6.5 Postwelding stress-relieving treatment
6.6 Repair of the molten weld imperfection
7 Welding Quality Inspection
7.1 General requirement
7.2 Appearance inspection
7.3 Nondestructive testing
8. Weld Strength and Reinforcement
9. Welder Examination
9.1 General requirement
9.2 Examination content and classification
9.3 Fundamental examination of manual manipulation skills
9.4 Additional examination for manual manipulation skill
9.5 Examination for manual manipulation skill in position welding
9.6 Skill examination of mechanical manipulation
9.7 Test record, re-trial, make-up exam, re-examination, exemption from examination and certificates
Appendix A directional property level of steel plate thickness and its sulfur content and contraction value of cross sectional area
Appendix C Clapboard Electroslag Weld inside Box Column (Beam)
Appendix D Ultrasonic Inspection Method and Imperfection Grades for Round Tube T, K and Y Node Weld
Appendix E Examination Result Registration Form and Certificate Format for Engineering Construction Welder
