BS 7123:1989

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Information and requirements to be agreed and to be
     documented
3.1 Information to be supplied by the client
3.2 Information to be supplied by either of the
     contracting parties
3.3 Requirements to be agreed
4. Materials
4.1 Parent metal
4.2 Backing material
5. Approval and testing of welding procedures
6. Approval and testing of welders
7. Inspection and testing
7.1 General
7.2 Quality of welds
8. Metal arc welding equipment
8.1 Equipment
8.2 Instrumentation
9. Metal arc welding consumables
9.1 Manual metal-arc welding
9.2 Gas-shielded welding
9.3 Non-shielded welding
9.4 Storage and handling
10. Welded connections
10.1 General
10.2 Butt joints
10.3 Splice joints
10.4 Lap joints
10.5 Cruciform joints
10.6 Tack welds (locational)
10.7 Preparation for welding
10.8 Assembly
10.9 Weld design
11. Welding practice
11.1 Adverse weather conditions
11.2 Preheating
11.3 Heat build-up during welding
11.4 Stray-arcing
11.5 Cleaning
11.6 Tack welds
11.7 Defective joints
11.8 Welding processes
11.9 Welding procedures
12. Approval of welding procedures
12.1 Approved procedures
12.2 Limitation of variable
12.3 Welding procedure approval tests
13. Welder approval
13.1 General
13.2 Changes not affecting approval
13.3 Limitation of variables
13.4 Number and type of tests
13.5 Acceptance levels
Appendices
A. Tack welds for locational purposes
B. Welding procedure sheet
Tables
1. Minimum preheating temperatures for butt joints
     and cruciform joints: hydrogen controlled
     consumables
2. Minimum preheating temperatures for butt joints
     and cruciform joints: non-hydrogen controlled
     consumables
3. Arc energy of runout lengths for electrodes of
     efficiency <110% complying with BS 639
4. Arc energy of runout lengths for electrodes of
     efficiency >100% and <130% complying with BS 639
5. Arc energy of runout lengths for electrodes of
     efficiency >130% complying with BS 639
6. Tests required for procedure approval
7. Acceptance levels (visual and macro examination)
8. Acceptance levels (radiographic examination) for
     butt welds
9. Tests for welder approval
10. Electrode diameters and welding currents for tack
     welds for locational purposes
Figures
1. Flare-bevel and flare-vee fillet welds
2. Butt joints
3. Splice joints
4. Lap joints
5. Start and finish of a lap joint
6. Cruciform joint
7. Effective throat thickness
8. Preheating temperatures for lap joints, splice
     joints and tack welded lap joints in steel bars
     having a carbon equivalent of 0.42% or less
9. Preheating temperatures for lap joints, splice
     joints and tack welded lap joints in steel bars
     having a carbon equivalent of >0.42% to 0.51%
10. Welding positions for tests on butt joints
11. Welding positions for tests on splice joints
12. Tensile test pieces and macro examination test
     specimens for procedure approval and welder
     approval tests
13. Suitable weldment forms for tack welds for
     locational purposes

Requirements for materials of construction, methods for the approval of welding procedures and welders, workmanship and inspection requirements for the joining of reinforcing steel for concrete structures.